SFI SYSTEM, Diagnostic DTC:P1604

DTC Code DTC Name
P1604 Startability Malfunction

DESCRIPTION

This DTC is stored when the engine does not start even though the STA signal is input or when the engine takes a long time to start, and when the engine speed is low or the engine stalls just after the engine starts.

Using the GTS, the conditions present when the DTC was stored can be confirmed by referring to the freeze frame data. Freeze frame data records engine conditions when a malfunction occurs. This information can be useful when troubleshooting.

It is necessary to check if the vehicle ran out of fuel before performing troubleshooting, as this DTC is also stored when there is engine starting trouble due to running out of fuel.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory
P1604 Startability Malfunction

Either of the following conditions is met:


  • The engine speed is below 500 rpm with the STA signal on for a certain amount of time (refer to the illustration below) (1 trip detection logic).

  • After the engine starts (engine speed is 500 rpm or more), the engine speed drops to 200 rpm or less within approximately 2 seconds (1 trip detection logic).

  • Engine assembly (excess friction, compression loss)

  • Starter assembly

  • Crankshaft position sensor

  • VVT sensor

  • Engine coolant temperature sensor

  • Fuel pump

  • Fuel pump control system

  • Fuel line (fuel filter, pipes and hoses)

  • Fuel injector assembly

  • Throttle body with motor assembly

  • Fuel pressure regulator

  • Battery

  • Drive plate and ring gear sub-assembly

  • Spark plug

  • Ignition coil assembly circuit

  • Intake system

  • Camshaft timing oil control valve assembly

  • Mass air flow meter sub-assembly

  • Air fuel ratio sensor

  • Valve timing

  • Fuel

  • Purge VSV

  • Intake valve

  • Immobiliser system

  • ECM

 Does not come on DTC stored
B003ZIXE09

CAUTION / NOTICE / HINT

Tech Tips


  • In contrast to normal malfunction diagnosis for components, circuits and systems, DTC P1604 is used to determine the malfunctioning area from the problem symptoms and freeze frame data when the user mentions problems such as starting difficulty.

    As this DTC can be stored as a result of certain user actions, even if the DTC is output, if the customer makes no mention of problems, clear the DTC without performing any troubleshooting and return the vehicle to the customer.

  • If any other DTCs are output, perform troubleshooting for those DTCs first.

  • When the Data List item "Immobiliser Fuel Cut" is ON, the engine cannot be started.

  • Read freeze frame data using the GTS. Freeze frame data records engine conditions when a malfunction occurs. This information can be useful when troubleshooting.

  • When confirming the freeze frame data, be sure to check all 5 sets of freeze frame data.

    Click here

  • When confirming the freeze frame data, if there are multiple items related to the cause of the malfunction, perform troubleshooting for all related items.

  • Try to start the vehicle under the conditions recorded in the freeze frame data which were present when the malfunction occurred. Confirm the data at this time and compare it with the freeze frame data.

  • If the malfunction does not recur, carefully check the vehicle conditions from when the malfunction occurred using freeze frame data.

  • When performing inspections, jiggle the relevant wire harnesses and connectors in an attempt to reproduce malfunctions that do not always occur.

  • If the same inspection or replacement procedure appears 2 times when performing an inspection procedure, it is not necessary to repeat the procedure the second time.


  1. Malfunction Recurrence and Inspection Areas


    1. Freeze frame data exists, but the malfunction (starting difficulty) has not reoccurred and the malfunction conditions are unknown.


      1. The engine speed recorded in the freeze frame data is 0 rpm (the engine does not crank).

        Tech Tips

        One of the following problems may be present: battery depletion, excess engine friction, a starter malfunction or a crankshaft position sensor malfunction.


        • If the battery voltage is less than 6 V during cranking, there is a high probability that engine friction is abnormal.

        • If the battery voltage drops to 5 V or less when starting the engine, the battery may be malfunctioning.

        • If the battery voltage fluctuates while cranking the engine, it can be concluded that cranking is being performed. When the engine speed is 0 rpm, the crankshaft position sensor and/or an ECM may be malfunctioning.

          B004096E51

      2. All engine speeds recorded in the freeze frame data are between 60 and 250 rpm (the engine cranks but there is no combustion).

        Tech Tips

        If the engine speed is between 60 and 250 rpm (no initial combustion), there may be a wiring problem or a complete failure of an ignition or fuel system part.


        • Due to an engine coolant temperature sensor malfunction, the fuel injection volume is extremely high or low and the engine may not be able to be started.

        B003ZGNE28

      3. The engine speed recorded in the freeze frame data is 250 rpm or higher (the initial combustion and starter turnoff timing is too late).

        Tech Tips

        If the engine speed is 250 rpm or higher (combustion occurs but the initial combustion and starter turnoff timing is too late), the fuel injection volume is often incorrect (too low or too high) and determining the cause of the malfunction is often difficult.


        • Due to an engine coolant temperature sensor malfunction, the fuel injection volume is extremely high or low and engine starting trouble may occur.

        • If Long FT is incorrect, there may be a fuel supply problem due to the injectors or fuel pump being clogged, etc.

        • If the engine cranking speed is too high, compression loss may have occurred due to carbon interfering with the valve operation.

          B004096E64

    2. When the malfunction (starting difficulty) can be reproduced, or malfunction conditions are known, perform the following inspections ("Problem symptoms" and "Systems to inspect")


      1. Problem symptoms


        1. The engine does not crank.

          Tech Tips

          The starter is normal if a noise that indicates the starter pinion gear is extending is heard. The battery may be fully depleted or there may be excess engine friction.

        2. The engine cranking speed is abnormal.

          Tech Tips

          If the engine cranking speed is too high (for example, 300 rpm or higher with no combustion), compression loss may have occurred because carbon interfered with valve operation, etc.

        3. There is no initial combustion.

          Tech Tips

          If there is no initial combustion, there is probably a wiring problem or an ignition or fuel system part malfunction.

        4. The engine stalls after starter turn off.

          Tech Tips

          If the engine stalls after starter turn off, the air fuel ratio may be incorrect or the VVT may have a problem returning.

        5. Initial combustion and starter turn off occur late.

          Tech Tips

          If initial combustion and starter turn off occur late, the fuel injection volume is probably incorrect (too low or too high).

          Tech Tips

          Causes of fuel system malfunctions according to conditions present at the time of the malfunction.


          • When 2 to 3 minutes have elapsed after stopping the engine: Fuel pressure loss due to the pressure regulator failing to maintain the fuel pressure.

          • When 15 to 120 minutes have elapsed after stopping the engine: Problem with injector fuel seal.

          • When a long time has elapsed after stopping the engine: Pressure regulator is stuck open.

      2. Systems to inspect.


        1. Intake system

        2. Ignition system

        3. Fuel system

  2. INSPECTION FLOW


    1. Freeze frame data exists, but the malfunction (starting difficulty) has not reoccurred and the malfunction conditions are unknown.

      Freeze Frame Data Item Result Suspected Area Procedure
      Engine Speed 0 rpm (no engine cranking at all)

      • Battery fully depleted

      • Engine assembly (excess friction)

      • Starter assembly

      • Crankshaft position sensor

      • ECM

      		 4 to 9
      60 to 250 rpm (engine cranks but no initial combustion*1)

      • Fuel pump control system

      • Ignition system

      • Engine coolant temperature sensor

      • Fuel injection system

      		 10 to 14
      250 rpm or higher (combustion occurs but initial combustion and starter turn off*2 occur late)

      • Engine assembly (compression loss)

      • Fuel injection system

      • Fuel pump control system

      		 15 to 23

      Tech Tips


      • *1: First combustion after cranking begins.

      • *2: Condition when engine speed increases and starter can be turned off.

    2. When the malfunction (starting difficulty) can be reproduced, or when malfunction conditions are known.


      1. Problem symptoms

        Problem Symptom Suspected Area Suspected Component Procedure
        The engine does not crank Battery malfunction

        • Battery fully depleted

        		 26 to 29, and 35 to 36
        Starting system

        • Starter assembly (includes pinion gear wear or tooth damage)

        • Starting system
        Engine assembly

        • Engine assembly (excess friction)

        • Drive plate and ring gear sub-assembly wear or tooth damage
        Cranking speed too low Battery malfunction

        • Battery fully depleted

        		 37 to 39
        Starting system

        • Starter assembly
        Engine assembly

        • Engine assembly (excess friction)
        Cranking speed too high Engine assembly

        • Engine assembly (compression loss)
        There is no initial combustion Fuel supply problem

        • Cannot maintain pressure due to pressure regulator malfunction

        • Fuel injector assembly leak

        • Fuel leak from fuel line

        • Fuel pump control system

        • Fuel pump

        		 41 to 54
        Ignition system malfunction

        • Spark plug

        • Crankshaft position sensor

        • Ignition coil assembly
        Engine stalls after starter turnoff Air suction

        • Intake system connections

        		 30 to 34 and 40
        Deposits in throttle body with motor assembly

        • Throttle body with motor assembly
        VVT valve does not return properly

        • Camshaft timing oil control valve assembly
        Mass air flow meter malfunction

        • Mass air flow meter sub-assembly
        Initial combustion and starter turnoff occur late Engine coolant temperature sensor malfunction

        • Engine coolant temperature sensor

        		 55 to 67 and 74
        Mass air flow meter sub-assembly malfunction

        • Mass air flow meter sub-assembly
        Abnormal air fuel learning value

        • Air fuel ratio sensor
        Deviation from fuel injection characteristics

        • Fuel injector assembly
        Wet-fouled or dry-fouled spark plug

        • Spark plug
        Lack of fuel pressure

        • Pressure regulator

        • Fuel pump

        • Fuel pump control system

      2. Systems to inspect.

        Troubleshooting by System Suspected Area Suspected Component Procedure
        Fuel system troubleshooting A Abnormal air fuel ratio learning value

        • Fuel injector assembly

        87 to 94

        95 to 102
        Rough idling

        • Crankshaft position sensor
        Abnormal fuel pressure

        • Fuel

        • Fuel leak from fuel line

        • Fuel pump

        • Pressure regulator
        Fuel system troubleshooting B Abnormal concentration of HC in intake manifold

        • Purge VSV system

        • Fuel injector assembly

        		 103 to 105
        Fuel system troubleshooting C Injection signal system malfunction

        • Fuel injector assembly

        • Crankshaft position sensor

        • VVT sensor

        • ECM

        		 69 to 73
        Intake system troubleshooting Difference between ISC target value and opening angle when idling

        • Engine assembly (compression loss)

        • Valve timing

        • Engine coolant temperature sensor

        • ECM

        84 to 86

        106 to 108
        Ignition system troubleshooting Camshaft and/or crankshaft position sensor signal malfunction

        • Crankshaft position sensor system (including sensor installation)

        • VVT sensor system (including sensor installation)

        • ECM

        75 to 83

        109 to 117

    Note


    • Inspect the fuses for circuits related to this system before performing the following procedure.

    • After turning ignition switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work.

      Click here

PROCEDURE


  1. CHECK ANY OTHER DTCS OUTPUT AND RECORD FREEZE FRAME DATA (IN ADDITION TO DTC P1604)

    B00404OE78
    *a DTC is stored
    *b 0.5 seconds
    *c Freeze frame data recorded point

    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Engine / Trouble Codes.

    5. Read the DTCs and record the Freeze Frame Data.


      Powertrain > Engine > Trouble Codes

      Tech Tips


      • This freeze frame data shows the actual engine conditions when engine starting trouble occurred.

      • When confirming the freeze frame data, be sure to check all 5 data sets of freeze frame data.

      • The fourth set of freeze frame data is the data recorded when then the DTC is stored.

      Result
      Result Proceed to
      DTC P1604 is output A
      DTC P1604 and other DTCs are output B

    B

    GO TO DTC CHART Click here

    A

  2. CHECK IMMOBILISER SYSTEM


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Engine / Data List / All Data / Immobiliser Communication and Immobiliser Fuel Cut.


      Powertrain > Engine > Data List
      Tester Display
      Immobiliser Communication
      Immobiliser Fuel Cut

    5. Check the Data List indication.

      OK
      Data List Item GTS Display
      Immobiliser Communication ON
      Immobiliser Fuel Cut OFF

      Tech Tips


      • If the engine is started immediately after reconnecting the battery terminal, the engine may stall immediately after it starts due to the intercommunication process between each ECU. For this reason, when starting the engine after reconnecting the battery terminal, first turn the ignition switch to ON and then wait several seconds for the communication process to complete before starting the engine.

      • When this operation causes DTC P1604 to be stored, this is due to normal operation of the immobiliser system and does not indicate a malfunction, so clear the DTC and return the vehicle to the customer.

      Result
      Result Proceed to
      OK A
      NG (w/ Smart Entry and Start System) B
      NG (w/o Smart Entry and Start System) C

    B

    CHECK IMMOBILISER SYSTEM Click here

    C

    CHECK IMMOBILISER SYSTEM Click here

    A

  3. CHECK MALFUNCTION CONDITION


    1. Confirm the problem symptoms.

      Result
      Result Proceed to
      Freeze frame data exists, but the starting difficulty cannot be reproduced and it is unknown what kind of starting difficulty occurred A
      The problem symptoms can be reproduced, or the malfunction conditions are known B

    B

    GO TO STEP 25 Click here

    A

  4. READ FREEZE FRAME DATA


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Using the GTS, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored.

      Click here

      Result
      Freeze Frame Data Item Suspected Area Proceed to
      Engine Speed Battery Voltage
      All 5 sets of freeze frame data are 0 rpm (no engine cranking at all) Minimum voltage is less than 5 V Battery fully depleted A
      Minimum voltage is 5 V or higher

      • Starter assembly malfunction

      • Crankshaft position sensor system

      • Excess engine friction

      • ECM

      		 B
      60 to 250 rpm (engine cranks but no initial combustion) -

      • Fuel pump control system

      • Ignition system

      • Engine coolant temperature sensor

      • Fuel injection system

      		 C
      250 rpm or higher (combustion occurs but initial combustion and starter turn off occur late) -

      • Engine assembly

      • Engine coolant temperature sensor

      • Fuel injection system

      • Fuel pump control system

      		 D
      Result
      Freeze Frame Data Item Suspected Area Proceed to
      Low Rev for Eng Start
      ON

      • Intake system connections

      • Throttle body with motor assembly

      • Camshaft timing oil control valve assembly

      • Mass air flow meter sub-assembly

      		 E

      Tech Tips


      • When DTC P1604 is stored, either "Engine Start Hesitation"*1 or "Low Rev for Eng Start"*2 in the Freeze Frame Data will be ON. If "Low Rev for Eng Start" is ON, proceed to E.

      • *1: This value turns ON when the engine speed does not reach a certain value for a certain period of time when starting the engine.

      • *2: This value turns ON when the engine stalls immediately after starting the engine. If "Low Rev for Eng Start" is ON, as there is a possibility that the low engine speed or engine stall was caused by the user, confirm the following freeze frame data items.


        • Immobiliser Fuel Cut

        • Engine Speed (Starter Off)

        • Shift SW Status (R, D Range)


    A

    CHARGE OR REPLACE BATTERY

    C

    READ FREEZE FRAME DATA Click here

    D

    READ FREEZE FRAME DATA Click here

    E

    INSPECT MASS AIR FLOW METER SUB-ASSEMBLY Click here

    B

  5. READ FREEZE FRAME DATA


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Using the GTS, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored.

      Click here

      Result
      Freeze Frame Data Item Result Suspected Area Proceed to
      Battery Voltage Minimum voltage is 6 V or higher and voltage does not fluctuate*1 Starter system A
      Minimum voltage is 6 V or higher and voltage fluctuates*2, *3

      • Crankshaft position sensor system

      • ECM

      		 B
      Minimum voltage is 5 to 6 V*4

      • Excess engine friction

      • Battery fully depleted

      		 C

      Tech Tips

      B003ZWQE05
      *1 Freeze Frame Data
      *2 Voltage does not Fluctuate
      *3 Voltage Fluctuates

      • *1: The 5 sets of freeze frame data show approximately the same battery voltage.

      • *2: The 5 sets of freeze frame data show different battery voltages.

      • *3: If the voltage fluctuates, it can be determined that cranking is being performed. When the engine speed is 0 rpm, the crankshaft position sensor system and/or the ECM may be malfunctioning.

      • *4: There may be excess engine friction. Make sure that the crankshaft rotates smoothly when turning it by hand. Excess engine friction may have occurred temporarily. Remove the cylinder head cover and oil pan, and check for foreign matter such as iron fragments. If there is a malfunction or signs of a malfunction present, perform a detailed inspection by disassembling all the parts.

      • Perform "Inspection After Repair" after repairing or replacing the engine assembly.

        Click here


    A

    CHECK STARTER SIGNAL CIRCUIT Click here

    C

    CHECK AND REPAIR ENGINE ASSEMBLY OR BATTERY

    B

  6. CHECK SENSOR INSTALLATION (CRANKSHAFT POSITION SENSOR)


    1. Check the tightening and installation condition of the crankshaft position sensor bolt.

    2. Check the connection of the crankshaft position sensor connector.

      OK
      Sensor is installed correctly.
      Result
      Proceed to
      OK
      NG

    NG

    SECURELY REINSTALL SENSOR

    OK

  7. INSPECT CRANKSHAFT POSITION SENSOR


    1. Disconnect the crankshaft position sensor connector.

    2. Check for oil on the connector terminals.

      OK
      No oil on the terminals.
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE CRANKSHAFT POSITION SENSOR Click here

    OK

  8. CHECK HARNESS AND CONNECTOR (CRANKSHAFT POSITION SENSOR - ECM)


    1. Check the harnesses and connectors, referring to DTC P0335 inspection procedure.

      Click here

      Tech Tips


      • Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.

      • Make sure there is not an excessive amount of force applied to the wire harness.

      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  9. REPLACE CRANKSHAFT POSITION SENSOR


    1. Replace the crankshaft position sensor.

      Click here

    2. Check the engine start operation.

      OK
      Malfunction has been repaired successfully.
      Result
      Proceed to
      OK
      NG

    OK

    END (CRANKSHAFT POSITION SENSOR IS DEFECTIVE)

    NG

    REPLACE ECM Click here

  10. READ FREEZE FRAME DATA


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Using the GTS, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored.

      Click here

      Result
      Freeze Frame Data Item Suspected Area Proceed to
      Coolant Temp, Intake Air Coolant Temp Fuel Pump Duty
      Difference between Coolant Temp and Intake Air is 10°C (18°F) or higher*1 Coolant Temp is 125°C (257°F) or higher, or less than ambient temperature*3 by 15°C (27°F) or higher - Engine coolant temperature sensor A
      Other than above All 5 sets of freeze frame data are higher than 0% - B
      At least 1 of the 5 sets of freeze frame data is 0% Fuel pump control system C
      Difference between Coolant Temp and Intake Air is less than 10°C (18°F)*2 - At least 1 of the 5 sets of freeze frame data is 0% Fuel pump control system
      All 5 sets of freeze frame data are higher than 0% - B

      Tech Tips


      • *1: A long time had not elapsed after stopping the engine.

      • *2: A long time had elapsed after stopping the engine.

      • *3: Use an actual ambient temperature estimated from the Initial Intake Air, Ambient Temp for A/C, and (if possible) the weather when the DTC was detected.

      • Perform "Inspection After Repair" after replacing the engine coolant temperature sensor.

        Click here


    A

    REPLACE ENGINE COOLANT TEMPERATURE SENSOR Click here

    C

    CHECK FUEL PUMP CONTROL CIRCUIT Click here

    B

  11. PERFORM ACTIVE TEST USING GTS (CONTROL THE FUEL PUMP / SPEED)


    1. Connect the GTS to the DLC3.

    2. Disconnect the fuel pump connector.

    3. Turn the ignition switch to ON.

    4. Turn the GTS on.

    5. B00408IC12
      *a

      Front view of wire harness connector

      (to Fuel Pump)

      Enter the following menus: Powertrain / Engine / Active Test / Control the Fuel Pump / Speed.


      Powertrain > Engine > Active Test
      Tester Display
      Control the Fuel Pump / Speed

    6. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Condition Specified Condition
      M9-4 - Body ground Active Test is being performed 11 to 14 V

      Tech Tips


      • Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.

      • Make sure there is not an excessive amount of force applied to the wire harness.

      Result
      Proceed to
      OK
      NG

    NG

    CHECK FUEL PUMP CONTROL CIRCUIT Click here

    OK

  12. CHECK TERMINAL VOLTAGE (#10, #20, #30, #40, #50 AND/OR #60)


    1. Check the harnesses and connectors, referring to DTC P0300 inspection procedure.

      Click here

      Tech Tips


      • Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.

      • Make sure there is not an excessive amount of force applied to the wire harness.

      Result
      Proceed to
      OK
      NG

    NG

    CHECK FUEL INJECTOR CIRCUIT Click here

    OK

  13. PERFORM ACTIVE TEST USING GTS (CONTROL THE FUEL PUMP / SPEED)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Engine / Active Test / Control the Fuel Pump / Speed.


      Powertrain > Engine > Active Test
      Tester Display
      Control the Fuel Pump / Speed

    5. When performing the Active Test, check for fuel leakage from the fuel pipes.

      Result
      Result Proceed to
      Fuel leakage or signs of fuel leakage are present A
      No fuel leakage or signs of fuel leakage B

      Tech Tips


      • Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.

      • When performing the Active Test, if there is no operating noise from the fuel pump, the fuel pump system may be malfunctioning.

      • Check if the vehicle ran out of fuel, as engine starting trouble due to running out of fuel is also detected.


    A

    REPAIR OR REPLACE FUEL LINE

    B

  14. CHECK FUEL SYSTEM


    1. Check for foreign matter such as iron particles around the fuel pump (fuel pump, fuel pump filter and inside the fuel tank), and for signs that the fuel pump was stuck.

      Result
      Result Proceed to
      There is foreign matter or signs that fuel pump was stuck A
      There is no foreign matter and no signs that fuel pump was stuck B

      Tech Tips

      If there is foreign matter such as iron particles on the fuel pump, remove the foreign matter.


    A

    REPAIR OR REPLACE FUEL SYSTEM

    B

    GO TO STEP 24 Click here

  15. READ FREEZE FRAME DATA


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Using the GTS, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored.

      Click here

      Result
      Freeze Frame Data Item Suspected Area Proceed to
      Coolant Temp, Intake Air Coolant Temp Long FT #1, Long FT #2 Engine Speed
      Difference between Coolant Temp and Intake Air is 10°C (18°F) or higher Coolant Temp is 125°C (257°F) or higher, or less than ambient temperature*2 by 15°C (27°F) or higher - - Engine coolant temperature sensor A
      Other than above -15% or less, or 15% or higher -

      • Fuel pump control system

      • Fuel injector assembly

      		 B
      -15 to 15% Minimum speed is 300 rpm or higher*1 Engine assembly C
      Minimum speed is less than 300 rpm

      • Fuel system

      • Intake air system

      		 D
      Difference between Coolant Temp and Intake Air is less than 10°C (18°F) - -15% or less, or 15% or higher -

      • Fuel pump control system

      • Fuel injector assembly

      		 B
      -15 to 15% Minimum speed is 300 rpm or higher*1 Engine assembly C
      Minimum speed is less than 300 rpm

      • Fuel system

      • Intake air system

      		 D

      Tech Tips


      • *1: Compression loss may have occurred in the engine assembly.

      • *2: Use an actual ambient temperature estimated from the Initial Intake Air, Ambient Temp for A/C, and (if possible) the weather when the DTC was detected.

      • Perform "Inspection After Repair" after replacing the engine assembly or engine coolant temperature sensor.

        Click here


    A

    REPLACE ENGINE COOLANT TEMPERATURE SENSOR Click here

    C

    CHECK AND REPAIR ENGINE ASSEMBLY

    D

    READ FREEZE FRAME DATA Click here

    B

  16. INSPECT FUEL INJECTOR ASSEMBLY


    1. Check that no carbon is stuck to the fuel injector assembly.

      OK
      No carbon present.

      Tech Tips

      Perform "Inspection After Repair" after replacing the fuel injector assembly.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE FUEL INJECTOR ASSEMBLY Click here

    OK

  17. CHECK FUEL SYSTEM


    1. Check for foreign matter such as iron particles around the fuel pump (fuel pump, fuel filter and inside the fuel tank), and for signs that the fuel pump was stuck.

      Result
      Result Proceed to
      There is foreign matter or signs that fuel pump was stuck A
      There is no foreign matter and no signs that fuel pump was stuck B

      Tech Tips

      If there is foreign matter such as iron particles on the fuel pump, remove the foreign matter.


    A

    REPAIR OR REPLACE FUEL SYSTEM

    B

    GO TO STEP 24 Click here

  18. READ FREEZE FRAME DATA


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Using the GTS, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored.

      Click here

      Result
      Freeze Frame Data Item Result Suspected Area Proceed to
      Coolant Temp Engine coolant temperature is 40°C (104°F) or less*1 Pressure regulator assembly A
      Engine coolant temperature is 90°C (194°F) or higher*2
      Engine coolant temperature is 40 to 90°C (104 to 194°F)*3 Fuel injector assembly B

      Tech Tips


      • *1: If the engine coolant temperature is 40°C [104°F] or less (after the engine is stopped and the vehicle is not driven for a long period of time), the pressure regulator may be stuck open. Attach a fuel pressure gauge and check the ability to maintain fuel pressure after stopping the engine.

      • *2: If the engine coolant temperature is 90°C [194°F] or higher (2 to 5 minutes have passed after stopping the engine), there may be a problem with the pressure regulator failing to maintain the fuel pressure. Attach a fuel pressure gauge and check the ability to maintain fuel pressure after stopping the engine.

      • *3: If the engine coolant temperature is 40 to 90°C [104 to 194°F] (15 to 120 minutes have passed after stopping the engine), there may be fuel leaking from a fuel injector.


    B

    INSPECT FUEL INJECTOR ASSEMBLY Click here

    A

  19. CHECK FUEL PRESSURE

    Tech Tips

    For the fuel pressure inspection, refer to the following procedures.

    Click here


    1. Attach a fuel pressure gauge and check the fuel pressure after stopping the engine.

      Standard
      147 kPa (1.5 kgf/cm2, 21 psi) or higher (5 minutes after stopping the engine)

      Tech Tips

      If the engine cannot be started, read the values after cranking the engine.

      Result
      Result Proceed to
      Abnormal A
      Normal B

    A

    REPLACE FUEL PRESSURE REGULATOR ASSEMBLY Click here

    B

    GO TO STEP 24 Click here

  20. INSPECT FUEL INJECTOR ASSEMBLY


    1. Clean the inside of the intake manifold with compressed air.

    2. After stopping the engine, measure the HC concentration inside the intake manifold for 15 minutes.

      Result
      Result Proceed to
      4000 ppm or higher A
      Less than 4000 ppm B

      Tech Tips

      If the concentration is 4000 ppm or higher, a fuel injector assembly may have a sealing problem.


    B

    GO TO STEP 22 Click here

    A

  21. INSPECT FUEL INJECTOR ASSEMBLY


    1. Inspect the fuel injector assemblies.

      Click here

      Tech Tips

      Perform "Inspection After Repair" after replacing the fuel injector assembly.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE FUEL INJECTOR ASSEMBLY Click here

    OK

  22. INSPECT THROTTLE BODY WITH MOTOR ASSEMBLY


    1. Check if carbon is in the air flow passage.

      Result
      Result Proceed to
      No carbon present A
      Carbon in passage B

      Tech Tips

      Perform "Inspection After Repair" after cleaning or replacing the throttle body with motor assembly.

      Click here


    B

    CLEAN OR REPLACE THROTTLE BODY WITH MOTOR ASSEMBLY Click here

    A

  23. CHECK INTAKE SYSTEM


    1. Check the intake system for vacuum leak.

      Click here

      OK
      No leak in intake system.

      Tech Tips

      Perform "Inspection After Repair" after repairing or replacing the intake system.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE INTAKE SYSTEM

    OK

  24. PERFORM SIMULATION TEST


    1. Check if the engine can be started.

      Result
      Result Proceed to
      Engine can be started A
      Engine cannot be started B

    A

    END

    B

  25. CONFIRM PROBLEM SYMPTOM


    1. Confirm the problem symptoms.

      Tech Tips

      The problem symptoms below can be determined by reading the freeze frame data.

      Result
      Problem Symptom Suspected Area Proceed to
      The engine does not crank

      • Battery fully depleted

      • Starter assembly (includes pinion gear wear or teeth damage)

      • Starter system

      • Engine assembly (excess friction)

      • Drive plate and ring gear sub-assembly wear or teeth damage

      		 A
      Abnormal cranking speed

      • Battery fully depleted

      • Starter assembly

      • Engine assembly (excess friction, compression loss)

      		 B
      There is no initial combustion (combustion does not occur even once)*1

      • Pressure regulator assembly fuel pressure maintenance

      • Fuel injector assembly leak

      • Fuel leak from fuel line

      • Fuel pump control system

      • Fuel pump

      • Spark plug

      • Crankshaft position sensor system

      • Ignition coil assembly system

      		 C
      The engine stalls after starter turnoff (engine stalls immediately after the first time the engine speed increases)*2

      • Intake system connections

      • Throttle body with motor assembly

      • Camshaft timing oil control valve assembly

      • Mass air flow meter sub-assembly system

      		 D
      Initial combustion and starter turn off occur late*3

      • Engine coolant temperature sensor

      • Mass air flow meter sub-assembly

      • Air fuel ratio sensor

      • Heated oxygen sensor

      • Fuel injector assembly

      • Spark plug

      • Pressure regulator assembly

      • Fuel pump

      • Fuel pump control system

      		 E

      Tech Tips


      • If there is hesitation (cranking speed is slow and combustion occurs before passing TDC) during the initial cranking period, the battery charge may be insufficient or the starter may be malfunctioning.

      • *1: If there is no initial combustion, a wire harness may be malfunctioning, or the ignition or fuel system may be malfunctioning.

      • *2: If the engine stalls after starter turn off, the air fuel ratio may be incorrect or the camshaft timing oil control valve may have a problem returning.

      • *3: If initial combustion and starter turn off occur late, the fuel injection volume may be incorrect (too low or too high).


    B

    PERFORM SIMULATION TEST Click here

    C

    INSPECT FUEL INJECTOR ASSEMBLY Click here

    D

    GO TO STEP 30 Click here

    E

    INSPECT ENGINE COOLANT TEMPERATURE SENSOR Click here

    A

  26. PERFORM SIMULATION TEST


    1. When cranking the engine, check for a noise indicating that the starter pinion gear is extending, and check that the starter pinion gear is not spinning freely.

      Result
      Problem Symptom Suspected Area Proceed to
      A noise indicating that the starter pinion gear is extending is heard and the starter pinion gear is not spinning freely*.

      • Battery

      • Excess engine friction

      • Starter assembly

      		 A
      A noise indicating that the starter pinion gear is extending is heard but the starter pinion gear is spinning freely.

      • Drive plate and ring gear sub-assembly

      • Starter assembly

      		 B
      A noise indicating that the starter pinion gear is extending is not heard

      • Battery

      • Starter assembly

      • Starter system

      		 C

      Tech Tips

      *: The battery may be fully depleted or there may be excess engine friction.


    B

    INSPECT STARTER ASSEMBLY (STARTER PINION GEAR) Click here

    C

    INSPECT BATTERY Click here

    A

  27. INSPECT BATTERY


    1. Inspect the battery.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    CHARGE OR REPLACE BATTERY

    OK

  28. CHECK ENGINE ASSEMBLY


    1. Check that the crankshaft rotates smoothly when rotating it by hand.

      OK
      Crankshaft rotates smoothly.

      Tech Tips


      • Excess engine friction may have occurred temporarily. Remove the cylinder head cover and oil pan, and check for foreign matter such as iron fragments. If there is a malfunction or signs of a malfunction present, perform a detailed inspection by disassembling all the parts.

      • Perform "Inspection After Repair" after repairing or replacing the engine assembly.

        Click here

      Result
      Proceed to
      OK
      NG

    OK

    INSPECT STARTER ASSEMBLY Click here

    NG

    REPAIR OR REPLACE ENGINE ASSEMBLY

  29. INSPECT STARTER ASSEMBLY (STARTER PINION GEAR)


    1. Remove the starter assembly.

      Click here

    2. Check for starter pinion gear wear and damage.

      OK
      There is no wear or damage.
      Result
      Result Proceed to
      NG A
      OK B

    A

    REPLACE STARTER ASSEMBLY Click here

    B

    REPLACE DRIVE PLATE AND RING GEAR SUB-ASSEMBLY Click here

  30. INSPECT MASS AIR FLOW METER SUB-ASSEMBLY


    1. Inspect the mass air flow meter sub-assembly.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER SUB-ASSEMBLY - ECM) Click here

    OK

  31. CHECK INTAKE SYSTEM


    1. Check for air leaks in the intake system (vacuum hose disconnection, cracks, damaged gaskets, etc.).

      Click here

      Tech Tips


      • If the accelerator pedal is released after racing the engine, the inspection is easier to perform because the vacuum inside the intake manifold increases and the air suction noise becomes louder.

      • If Short FT and Long FT are largely different from the normal values (differ by more than 15%) when idling (intake air volume is small) and almost the same as the normal values when racing the engine (for example, when maintaining a speed of 3000 rpm) (intake air volume is high), air leakage may be present.

      OK
      There are no air leaks.

      Tech Tips

      Perform "Inspection After Repair" after repairing or replacing the intake system.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE INTAKE SYSTEM

    OK

  32. INSPECT THROTTLE BODY WITH MOTOR ASSEMBLY


    1. Disconnect the throttle body with motor assembly connector.

      Tech Tips

      When the connector is disconnected, the vehicle enters fail-safe mode and the throttle valve opening angle is 4 to 7°.

    2. Crank the engine and check that it starts.

      Result
      Result Proceed to
      Engine starts A
      Engine does not start B

      Tech Tips

      When this inspection is performed, the MIL may illuminate. After finishing the inspection, check and clear DTCs.


    B

    GO TO STEP 34 Click here

    A

  33. INSPECT THROTTLE BODY WITH MOTOR ASSEMBLY


    1. Check if carbon is in the air flow passage.

      OK
      No carbon present.

      Tech Tips

      Perform "Inspection After Repair" after cleaning or replacing the throttle body with motor assembly.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REMOVE FOREIGN OBJECT AND CLEAN THROTTLE BODY WITH MOTOR ASSEMBLY

    OK

  34. PERFORM ACTIVE TEST USING GTS (OPERATE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY)


    1. Operate the VVT system through the Active Test, and check if the VVT system is operating normally.


      1. Perform the Active Test, referring to DTC P0011 inspection procedure (VVT system for intake camshaft).

        Click here

      2. Perform the Active Test, referring to DTC P0014 inspection procedure (VVT system for exhaust camshaft).

        Click here

        Result
        Result Proceed to
        NG A
        OK

        B

        *

        Tech Tips


        • Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.

        • When the results of the inspection using the Active Test are normal but the valve operating noise is abnormal, check the valve for any signs of problems.

        • *: From step 68, perform intake system troubleshooting (steps 84 to 86). If engine starting trouble still occurs, perform fuel system troubleshooting A (steps 87 to 94).


    A

    REPLACE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (FOR INTAKE OR EXHAUST CAMSHAFT) Click here

    B

    GO TO STEP 68 Click here

  35. INSPECT BATTERY


    1. Inspect the battery.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    CHARGE OR REPLACE BATTERY

    OK

  36. INSPECT STARTER ASSEMBLY


    1. Inspect the starter assembly.

      Click here

      Result
      Proceed to
      OK
      NG

    OK

    CHECK STARTER SIGNAL CIRCUIT Click here

    NG

    REPLACE STARTER ASSEMBLY Click here

  37. PERFORM SIMULATION TEST


    1. Check the cranking speed.

      Result
      Problem Symptom Suspected Area Proceed to
      Cranking speed is slow (100 rpm or less)

      • Battery

      • Starter assembly

      • Excess engine friction

      		 A
      Cranking speed is fast (300 rpm or higher)* Engine compression loss B

      Tech Tips


      • *: If the cranking speed is fast, there may be compression loss.

      • Perform "Inspection After Repair" after repairing or replacing the engine assembly.

        Click here


    B

    CHECK AND REPAIR ENGINE ASSEMBLY

    A

  38. INSPECT BATTERY


    1. Inspect the battery.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    CHARGE OR REPLACE BATTERY

    OK

  39. CHECK ENGINE ASSEMBLY


    1. Check that the crankshaft rotates smoothly when rotating it by hand.

      OK
      Crankshaft rotates smoothly.

      Tech Tips


      • Excess engine friction may have occurred temporarily. Remove the cylinder head cover and oil pan, and check for foreign matter such as iron fragments. If there is a malfunction or signs of a malfunction present, perform a detailed inspection by disassembling all the parts.

      • Perform "Inspection After Repair" after repairing or replacing the engine assembly.

        Click here

      Result
      Proceed to
      OK
      NG

    OK

    INSPECT STARTER ASSEMBLY Click here

    NG

    CHECK AND REPLACE ENGINE ASSEMBLY

  40. CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER SUB-ASSEMBLY - ECM)


    1. Check the harnesses and connectors, referring to DTC P0102 inspection procedure.

      Click here

      Tech Tips


      • Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.

      • Make sure there is not an excessive amount of force applied to the wire harness.

      • If the wire harness is normal, after replacing the mass air flow meter, check if engine starting trouble occurs again. If engine starting trouble occurs again, proceed to step 68 and perform intake system troubleshooting (steps 84 to 86). If engine starting trouble still occurs, perform fuel system troubleshooting A (steps 87 to 94).

      • Perform "Inspection After Repair" after replacing the mass air flow meter sub-assembly.

        Click here

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE MASS AIR FLOW METER SUB-ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  41. INSPECT FUEL INJECTOR ASSEMBLY


    1. Using a sound scope or screwdriver, check for an injector operating sound while cranking the engine.

      OK
      Fuel injector assembly operating sound is heard.
      Result
      Proceed to
      OK
      NG

    NG

    READ VALUE USING GTS (ENGINE SPEED) Click here

    OK

  42. CHECK FUEL PRESSURE


    1. Inspect the fuel pressure.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    PERFORM ACTIVE TEST USING GTS (CONTROL THE FUEL PUMP / SPEED) Click here

    OK

  43. CHECK SPARK PLUG AND SPARK


    1. Check for sparks.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    INSPECT SPARK PLUG Click here

    OK

  44. CONFIRM VEHICLE CONDITION


    1. Confirm the conditions present when the malfunction occurred based on the customer problem analysis.

      Result
      Problem Symptom Suspected Area Proceed to
      When the engine is stopped and a long time has passed, engine starting trouble occurs*1 Pressure regulator assembly is stuck open A
      When the engine is stopped and approximately 2 to 3 minutes have passed, engine starting trouble occurs*2 Failure to maintain fuel pressure by pressure regulator assembly
      When the engine is stopped and approximately 15 to 120 minutes have passed, engine starting trouble occurs*3 Fuel injector assembly leak B
      Condition other than above, or there is an inconsistency in the conditions present when engine starting trouble occurs -

      C

      *4

      Tech Tips


      • *1: The pressure regulator may be stuck open. Attach a fuel pressure gauge and check the ability to maintain fuel pressure after stopping the engine.

      • *2: The pressure regulator may not be able to maintain the fuel pressure. Attach a fuel pressure gauge and check the ability to maintain fuel pressure after stopping the engine.

      • *3: Fuel may be leaking from a fuel injector assembly.

      • *4: From step 68, perform fuel system troubleshooting C (steps 69 to 73).


    B

    INSPECT FUEL INJECTOR ASSEMBLY Click here

    C

    GO TO STEP 68 Click here

    A

  45. CHECK FUEL PRESSURE

    Tech Tips

    For the fuel pressure inspection, refer to the following procedures.

    Click here


    1. Attach a fuel pressure gauge and check the fuel pressure after stopping the engine.

      Standard
      147 kPa (1.5 kgf/cm2, 21 psi) or higher (5 minutes after stopping the engine)
      Result
      Result Proceed to
      Abnormal A
      Normal

      B

      *

      Tech Tips


      • If the engine cannot be started, read the values after cranking the engine.

      • *: from step 68, perform fuel system troubleshooting C (steps 69 to 73).


    A

    REPLACE FUEL PRESSURE REGULATOR ASSEMBLY Click here

    B

    GO TO STEP 68 Click here

  46. INSPECT FUEL INJECTOR ASSEMBLY


    1. Clean the inside of the intake manifold with compressed air.

    2. After stopping the engine, measure the HC concentration inside the intake manifold for 15 minutes.

      Result
      Result Proceed to
      4000 ppm or higher A
      Less than 4000 ppm

      B

      *

      Tech Tips


      • If the concentration is 4000 ppm or higher, a fuel injector assembly may have a sealing problem.

      • *: From step 68, perform fuel system troubleshooting C (steps 69 to 73).

      • Perform "Inspection After Repair" after replacing the fuel injector assembly.

        Click here


    A

    REPLACE FUEL INJECTOR ASSEMBLY Click here

    B

    GO TO STEP 68 Click here

  47. INSPECT SPARK PLUG


    1. Inspect the spark plugs.

      Click here

      Tech Tips


      • Even if the spark plug of only one cylinder is malfunctioning, replace the spark plugs of all cylinders.

      • Perform "Inspection After Repair" after replacing the spark plug.

        Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE SPARK PLUG Click here

    OK

  48. READ VALUE USING GTS (ENGINE SPEED)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Engine / Data List / All Data / Engine Speed.


      Powertrain > Engine > Data List
      Tester Display
      Engine Speed

    5. Start the engine.

    6. While running the engine, read the [Engine Speed] value.

      OK
      A value that matches the actual engine speed is constantly output.

      Tech Tips


      • Check the engine speed using a line graph.

      • If the engine cannot be started, check the engine speed while cranking the engine.

      • If the engine speed is 0 rpm, the crankshaft position sensor may have an open or short circuit.

      Result
      Proceed to
      OK
      NG

    NG

    CHECK CRANKSHAFT POSITION SENSOR CIRCUIT Click here

    OK

  49. CHECK TERMINAL VOLTAGE (POWER SOURCE OF IGNITION COIL ASSEMBLY)


    1. Check the harnesses and connectors, referring to DTC P0351 inspection procedure.

      Click here

      Tech Tips


      • Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.

      • Make sure there is not an excessive amount of force applied to the wire harness.

      Result
      Proceed to
      OK
      NG

    NG

    CHECK IGNITION COIL POWER SOURCE CIRCUIT Click here

    OK

  50. CHECK HARNESS AND CONNECTOR (IGNITION COIL ASSEMBLY - ECM)


    1. Check the harnesses and connectors, referring to DTC P0351 inspection procedure.

      Click here

      Tech Tips


      • Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.

      • Make sure there is not an excessive amount of force applied to the wire harness.

      • If the wire harness is normal, after replacing the ignition coil assembly, check if engine starting trouble occurs again. If engine starting trouble occurs again, proceed to step 68 and perform troubleshooting for the ignition system (steps 75 to 83).

      • Perform "Inspection After Repair" after replacing the ignition coil assembly.

        Click here

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE IGNITION COIL ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  51. PERFORM ACTIVE TEST USING GTS (CONTROL THE FUEL PUMP / SPEED)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Engine / Active Test / Control the Fuel Pump / Speed.


      Powertrain > Engine > Active Test
      Tester Display
      Control the Fuel Pump / Speed

    5. When performing the Active Test, check for an operating sound from the fuel pump.

      OK
      Control the Fuel Pump / Speed Specified Condition
      ON Operating sound heard
      OFF Operating sound not heard

      Tech Tips

      Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.

      Result
      Proceed to
      OK
      NG

    NG

    CHECK FUEL PUMP CONTROL CIRCUIT Click here

    OK

  52. PERFORM ACTIVE TEST USING GTS (CONTROL THE FUEL PUMP / SPEED)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Engine / Active Test / Control the Fuel Pump / Speed.


      Powertrain > Engine > Active Test
      Tester Display
      Control the Fuel Pump / Speed

    5. When performing the Active Test, check for fuel leakage from the fuel pipes.

      Result
      Result Proceed to
      Fuel leakage or signs of fuel leakage are present A
      No fuel leakage or signs of fuel leakage B

      Tech Tips


      • Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.

      • Check if the vehicle ran out of fuel, as engine starting trouble due to running out of fuel is also detected.

      • If there are no fuel leaks, after inspecting the fuel pump control system, check if engine starting trouble occurs again. If engine starting trouble occurs again, proceed to step 68 and perform fuel system troubleshooting C (steps 69 to 73).


    A

    REPAIR OR REPLACE FUEL LINE

    B

    CHECK FUEL PUMP CONTROL CIRCUIT Click here

  53. READ VALUE USING GTS (ENGINE SPEED)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Engine / Data List / All Data / Engine Speed.


      Powertrain > Engine > Data List
      Tester Display
      Engine Speed

    5. Start the engine.

    6. While running the engine, read the [Engine Speed] value.

      OK
      A value that matches the actual engine speed is constantly output.

      Tech Tips


      • Check the engine speed using a line graph.

      • If the engine cannot be started, check the engine speed while cranking the engine.

      • If the engine speed is 0 rpm, the crankshaft position sensor may have an open or short circuit.

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE CRANKSHAFT POSITION SENSOR Click here

    OK

  54. CHECK TERMINAL VOLTAGE (#10, #20, #30, #40, #50 AND/OR #60)


    1. Check the harnesses and connectors, referring to DTC P0300 inspection procedure.

      Click here

      Tech Tips


      • Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.

      • Make sure there is not an excessive amount of force applied to the wire harness.

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE ECM Click here

    NG

    CHECK FUEL INJECTOR CIRCUIT Click here

  55. INSPECT ENGINE COOLANT TEMPERATURE SENSOR


    1. Inspect the engine coolant temperature sensor.

      Click here

      Tech Tips


      • If the engine coolant temperature sensor is malfunctioning, after replacing it, check if engine starting trouble occurs again. If engine starting trouble occurs, replace the ECM. If engine starting trouble still occurs, proceed to step 68 and perform fuel system troubleshooting A (steps 95 to 102), fuel system troubleshooting B (steps 103 to 105), intake system troubleshooting (steps 106 to 108), and ignition system troubleshooting (steps 109 to 117), in that order.

      • Perform "Inspection After Repair" after replacing the engine coolant temperature sensor.

        Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE ENGINE COOLANT TEMPERATURE SENSOR Click here

    OK

  56. CHECK HARNESS AND CONNECTOR (ENGINE COOLANT TEMPERATURE SENSOR - ECM)


    1. Disconnect the engine coolant temperature sensor connector.

    2. Disconnect the ECM connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      C17-2 - C1-114 (THW) Always Below 1 Ω
      C17-1 - C1-117 (ETHW) Always Below 1 Ω
      C17-2 or C1-114 (THW) - Body ground Always 10 kΩ or higher

      Tech Tips


      • Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.

      • Make sure there is not an excessive amount of force applied to the wire harness.

      • If the wire harness or connector is malfunctioning, after replacing or repairing it, check if engine starting trouble occurs again. If engine starting trouble occurs, replace the ECM. If engine starting trouble still occurs, proceed to step 68 and perform fuel system troubleshooting A (steps 95 to 102), fuel system troubleshooting B (steps 103 to 105), intake system troubleshooting (steps 106 to 108), and ignition system troubleshooting (steps 109 to 117), in that order.

      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  57. INSPECT MASS AIR FLOW METER SUB-ASSEMBLY


    1. Inspect the mass air flow meter sub-assembly.

      Click here

      Tech Tips


      • If the mass air flow meter sub-assembly is malfunctioning, after replacing it, check if engine starting trouble occurs again. If engine starting trouble occurs, replace the ECM. If engine starting trouble still occurs, proceed to step 68 and perform fuel system troubleshooting A (steps 95 to 102), fuel system troubleshooting B (steps 103 to 105), intake system troubleshooting (steps 106 to 108), and ignition system troubleshooting (steps 109 to 117), in that order.

      • Perform "Inspection After Repair" after replacing the mass air flow meter sub-assembly.

        Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE MASS AIR FLOW METER SUB-ASSEMBLY Click here

    OK

  58. CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER SUB-ASSEMBLY - ECM)


    1. Check the harnesses and connectors, referring to DTC P0102 inspection procedure.

      Click here

      Tech Tips


      • Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.

      • Make sure there is not an excessive amount of force applied to the wire harness.

      • If the wire harness or connector is malfunctioning, after replacing or repairing it, check if engine starting trouble occurs again. If engine starting trouble occurs, replace the ECM. If engine starting trouble still occurs, proceed to step 68 and perform fuel system troubleshooting A (steps 95 to 102), fuel system troubleshooting B (steps 103 to 105), intake system troubleshooting (steps 106 to 108), and ignition system troubleshooting (steps 109 to 117), in that order.

      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  59. READ VALUE USING GTS


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Engine / Data List / All Data / Long FT #1, Long FT #2 and Atmosphere Pressure.


      Powertrain > Engine > Data List
      Tester Display
      Atmosphere Pressure
      Long FT #1
      Long FT #2
      Result
      Data List Item Result Suspected Area Proceed to
      Long FT #1, Long FT #2 25% or higher, or less than -25%

      • Air fuel ratio sensor

      • Heated oxygen sensor

      • Mass air flow meter sub-assembly

      • Fuel injector assembly

      • ECM

      		 A
      Atmosphere Pressure 80 kPa(abs) [600 mmHg(abs)] or less (when altitude is 0 m [0 ft])
      Both Data List items listed above Values are other than above - B

    B

    CHECK FUEL PRESSURE Click here

    A

  60. PERFORM SIMULATION TEST


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Engine / Utility / Learning Value Reset.


      Powertrain > Engine > Utility
      Tester Display
      Learning Value Reset

    5. Confirm the following conditions as instructed on the screen.


      • Ignition switch ON

      • Engine stopped

      • Battery voltage is higher than 9 V

    6. After confirming, select "Next" and initialize the learn value.

      Tech Tips

      If a message indicating learned value initialization failure is displayed on the screen, confirm the execution conditions, and perform learned value initialization again.

    7. Check if the engine can be started.

      Result
      Result Proceed to
      Engine can be started A
      Engine cannot be started B

    B

    GO TO STEP 63 Click here

    A

  61. INSPECT AIR FUEL RATIO SENSOR

    B003Z79E08

    1. Connect the GTS to the DLC3.

    2. Start the engine.

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Engine / Data List / All Data / Fuel System Status #1 and Fuel System Status #2.


      Powertrain > Engine > Data List
      Tester Display
      Fuel System Status #1
      Fuel System Status #2

    5. Confirm that Fuel System Status #1 and #2 is CL.

    6. Enter the following menus: Powertrain / Engine / Data List / All Data / AF Lambda B1S1 and AF Lambda B2S1.


      Powertrain > Engine > Data List
      Tester Display
      AF Lambda B1S1
      AF Lambda B2S1

    7. Confirm that AF Lambda B1S1 and B2S1 is within the range of 0.95 to 1.05 when idling.

    8. Enter the following menus: Powertrain / Engine / Active Test / Control the Injection Volume for A/F Sensor / All Data / AFS Voltage B1S1, AFS Voltage B2S1, O2S B1S2 and O2S B2S2.


      Powertrain > Engine > Active Test
      Active Test Display
      Control the Injection Volume for A/F Sensor
      Data List Display
      AFS Voltage B1S1
      AFS Voltage B2S1
      O2S B1S2
      O2S B2S2

    9. Read the output voltage from the air fuel ratio sensor when increasing and decreasing the fuel injection volume.

      Standard
      GTS Display Injection Volume Specified Condition

      AFS Voltage B1S1

      AFS Voltage B2S1

      		 12.5% Air fuel ratio sensor output voltage is below 3.1 V
      -12.5% Air fuel ratio sensor output voltage is higher than 3.4 V

      Tech Tips


      • The air fuel ratio sensor has an output delay of a few seconds and the heated oxygen sensor has a maximum output delay of approximately 20 seconds.

      • If the air fuel ratio sensor is malfunctioning, after replacing it, check if engine starting trouble occurs again. If engine starting trouble occurs, replace the ECM. If engine starting trouble still occurs, proceed to step 68 and perform fuel system troubleshooting A (steps 95 to 102), fuel system troubleshooting B (steps 103 to 105), intake system troubleshooting (steps 106 to 108), and ignition system troubleshooting (steps 109 to 117), in that order.

      • Perform "Inspection After Repair" after replacing the air fuel ratio sensor.

        Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE AIR FUEL RATIO SENSOR Click here

    OK

  62. PERFORM SIMULATION TEST


    1. Check if the idling speed is stable after starting the engine.

      OK
      Engine speed is stable.

      Tech Tips


      • After replacing the fuel injector assembly or mass air flow meter sub-assembly, check if engine starting trouble occurs again. If engine starting trouble occurs, replace the ECM. If engine starting trouble still occurs, proceed to step 68 and perform fuel system troubleshooting A (steps 95 to 102), fuel system troubleshooting B (steps 103 to 105), intake system troubleshooting (steps 106 to 108), and ignition system troubleshooting (steps 109 to 117), in that order.

      • Perform "Inspection After Repair" after replacing the fuel injector assembly or mass air flow meter sub-assembly.

        Click here

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE MASS AIR FLOW METER SUB-ASSEMBLY Click here

    NG

    REPLACE FUEL INJECTOR ASSEMBLY Click here

  63. CHECK FUEL PRESSURE


    1. Check the fuel pressure.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    PERFORM ACTIVE TEST USING GTS (CONTROL THE FUEL PUMP / SPEED) Click here

    OK

  64. INSPECT SPARK PLUG


    1. Inspect the spark plugs.

      Click here

      Result
      Result Proceed to
      All cylinders are normal A
      One cylinder is abnormal*1 B
      All cylinders are abnormal*2, *3 C

      Tech Tips


      • *1: If one cylinder is abnormal, replace the spark plug of that cylinder and inspect the ignition and fuel system for that cylinder. After performing repairs, check if engine starting trouble occurs again. If engine starting trouble still occurs, proceed to step 68 and perform fuel system troubleshooting A (steps 95 to 102), fuel system troubleshooting B (steps 103 to 105), intake system troubleshooting (steps 106 to 108), and ignition system troubleshooting (steps 109 to 117), in that order.

      • *2: If all cylinders are abnormal, replace the spark plugs of all cylinders and check if engine starting trouble occurs again. If engine starting trouble still occurs, proceed to step 68 and perform fuel system troubleshooting A (steps 95 to 102), fuel system troubleshooting B (steps 103 to 105), intake system troubleshooting (steps 106 to 108), and ignition system troubleshooting (steps 109 to 117), in that order.

      • *3: Engine starting trouble may occur if the vehicle is driven extremely short distances repeatedly.

      • Perform "Inspection After Repair" after replacing the spark plug.

        Click here


    B

    REPLACE SPARK PLUG (ABNORMAL CYLINDER) Click here

    C

    REPLACE SPARK PLUG (ALL CYLINDER) Click here

    A

  65. CONFIRM VEHICLE CONDITION


    1. Confirm the conditions present when the malfunction occurred based on the customer problem analysis.

      Result
      Problem Symptom Suspected Area Proceed to
      When the engine is stopped and a long time has passed, engine starting trouble occurs*1 Pressure regulator assembly is stuck open A
      When the engine is stopped and approximately 2 to 3 minutes have passed, engine starting trouble occurs*2 Failure to maintain fuel pressure by pressure regulator assembly
      When the engine is stopped and approximately 15 to 120 minutes have passed, engine starting trouble occurs*3 Fuel injector assembly leak B
      Condition other than above, or there is an inconsistency in the conditions present when engine starting trouble occurs -

      C

      *4

      Tech Tips


      • *1: The pressure regulator may be stuck open. Attach a fuel pressure gauge and check the ability to maintain fuel pressure after stopping the engine.

      • *2: The pressure regulator may not be able to maintain the fuel pressure. Attach a fuel pressure gauge and check the ability to maintain fuel pressure after stopping the engine.

      • *3: Fuel may be leaking from a fuel injector assembly.

      • *4: From step 68, perform fuel system troubleshooting A (steps 95 to 102), fuel system troubleshooting B (steps 103 to 105), intake system troubleshooting (steps 106 to 108), and ignition system troubleshooting (steps 109 to 117), in that order.


    B

    INSPECT FUEL INJECTOR ASSEMBLY Click here

    C

    CHECK MALFUNCTION CONDITION Click here

    A

  66. CHECK FUEL PRESSURE

    Tech Tips

    For the fuel pressure inspection, refer to the following procedures.

    Click here


    1. Attach a fuel pressure gauge and check the fuel pressure after stopping the engine.

      Standard
      147 kPa (1.5 kgf/cm2, 21 psi) or higher (5 minutes after stopping the engine)
      Result
      Result Proceed to
      Abnormal A
      Normal

      B

      *

      Tech Tips


      • If the engine cannot be started, read the values after cranking the engine.

      • *: From step 68, perform fuel system troubleshooting A (steps 95 to 102), fuel system troubleshooting B (steps 103 to 105), intake system troubleshooting (steps 106 to 108), and ignition system troubleshooting (steps 109 to 117), in that order.


    A

    REPLACE FUEL PRESSURE REGULATOR ASSEMBLY Click here

    B

    GO TO STEP 68 Click here

  67. INSPECT FUEL INJECTOR ASSEMBLY


    1. Clean the inside of the intake manifold with compressed air.

    2. After stopping the engine, measure the HC concentration inside the intake manifold for 15 minutes.

      Result
      Result Proceed to
      4000 ppm or higher A
      Less than 4000 ppm

      B

      *

      Tech Tips


      • If the concentration is 4000 ppm or higher, a fuel injector may have a sealing problem.

      • *: From step 68, perform fuel system troubleshooting A (steps 95 to 102), fuel system troubleshooting B (steps 103 to 105), intake system troubleshooting (steps 106 to 108), and ignition system troubleshooting (steps 109 to 117), in that order.

      • Perform "Inspection After Repair" after replacing the fuel injector assembly.

        Click here


    A

    REPLACE FUEL INJECTOR ASSEMBLY Click here

    B

  68. CHECK MALFUNCTION CONDITION


    1. If the malfunction could not be identified during the inspection in steps 44, 45, 46 and 52, perform fuel system troubleshooting C (steps 69 to 73).

      Result
      Performed Step Troubleshooting by System Procedure Proceed to
      Steps 44, 45, 46 and 52 Fuel system troubleshooting C 69 to 73 A

    2. If the malfunction could not be identified during the inspection in step 50, perform ignition system troubleshooting (steps 75 to 83).

      Result
      Performed Step Troubleshooting by System Procedure Proceed to
      Step 50 Ignition system troubleshooting 75 to 83 B

    3. If the malfunction could not be identified during the inspection in steps 34 and 40, perform intake air system troubleshooting (steps 84 to 86). If engine starting trouble still occurs, perform fuel system troubleshooting A (steps 87 to 94).

      Result
      Performed Step Troubleshooting by System Procedure Proceed to
      Step 34 and 40 Intake air system troubleshooting 84 to 86 C
      Fuel system troubleshooting A 87 to 94

    4. If the malfunction could not be identified during the inspection in steps 55, 56, 57, 58, 61, 62, 64, 65, 66, 67 and 74, perform fuel system troubleshooting A (steps 95 to 102), fuel system troubleshooting B (steps 103 to 105), intake air system troubleshooting (steps 106 to 108), and ignition system troubleshooting (steps 109 to 117), in that order.

      Result
      Performed Step Troubleshooting by System Procedure Proceed to
      Steps 55, 56, 57, 58, 61, 62, 64, 65, 66, 67 and 74 Fuel system troubleshooting A 95 to 102 D
      Fuel system troubleshooting B 103 to 105
      Intake air system troubleshooting 106 to 108
      Ignition system troubleshooting 109 to 117

    B

    CHECK SENSOR INSTALLATION (CRANKSHAFT POSITION SENSOR) Click here

    C

    READ VALUE USING GTS (ISC LEARNING VALUE) Click here

    D

    CHECK FUEL PRESSURE Click here

    A

  69. INSPECT FUEL INJECTOR ASSEMBLY


    1. Inspect the fuel injector assemblies.

      Click here

      Tech Tips

      Perform "Inspection After Repair" after replacing the fuel injector assembly.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE FUEL INJECTOR ASSEMBLY Click here

    OK

  70. CHECK TERMINAL VOLTAGE (#10, #20, #30, #40, #50 AND/OR #60)


    1. Check the harnesses and connectors, referring to DTC P0300 inspection procedure.

      Click here

      Tech Tips


      • Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.

      • Make sure there is not an excessive amount of force applied to the wire harness.

      Result
      Proceed to
      OK
      NG

    NG

    CHECK FUEL INJECTOR CIRCUIT Click here

    OK

  71. REPLACE CRANKSHAFT POSITION SENSOR


    1. Replace the crankshaft position sensor.

      Click here

    2. Check the engine start operation.

      OK
      Malfunction has been repaired successfully.
      Result
      Proceed to
      OK
      NG

    OK

    END (CRANKSHAFT POSITION SENSOR IS DEFECTIVE)

    NG

  72. REPLACE VVT SENSOR (FOR INTAKE CAMSHAFT)


    1. Replace the VVT sensor (for intake camshaft).

      Click here

    2. Check the engine start operation.

      OK
      Malfunction has been repaired successfully.
      Result
      Proceed to
      OK
      NG

    OK

    END (VVT SENSOR (FOR INTAKE CAMSHAFT) IS DEFECTIVE)

    NG

  73. REPLACE VVT SENSOR (FOR EXHAUST CAMSHAFT)


    1. Replace the VVT sensor (for exhaust camshaft).

      Click here

    2. Check the engine start operation.

      OK
      Malfunction has been repaired successfully.
      Result
      Proceed to
      OK
      NG

    OK

    END (VVT SENSOR (FOR EXHAUST CAMSHAFT) IS DEFECTIVE)

    NG

    REPLACE ECM Click here

  74. PERFORM ACTIVE TEST USING GTS (CONTROL THE FUEL PUMP / SPEED)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Engine / Active Test / Control the Fuel Pump / Speed.


      Powertrain > Engine > Active Test
      Tester Display
      Control the Fuel Pump / Speed

    5. When performing the Active Test, check for fuel leakage from the fuel pipes.

      Result
      Result Proceed to
      Fuel leakage or signs of fuel leakage are present A
      No fuel leakage or signs of fuel leakage B

      Tech Tips


      • Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.

      • Check if the vehicle ran out of fuel, as engine starting trouble due to running out of fuel is also detected.

      • If there are no fuel leaks, after inspecting the fuel pump control system, check if engine starting trouble occurs again. If engine starting trouble still occurs, proceed to step 68 and perform fuel system troubleshooting A (steps 95 to 102), fuel system troubleshooting B (steps 103 to 105), intake system troubleshooting (steps 106 to 108), and ignition system troubleshooting (steps 109 to 117), in that order.


    A

    REPAIR OR REPLACE FUEL LINE

    B

    CHECK FUEL PUMP CONTROL CIRCUIT Click here

  75. CHECK SENSOR INSTALLATION (CRANKSHAFT POSITION SENSOR)


    1. Check the tightening and installation condition of the crankshaft position sensor bolt.

    2. Check the connection of the crankshaft position sensor connector.

      OK
      Sensor is installed correctly.
      Result
      Proceed to
      OK
      NG

    NG

    SECURELY REINSTALL SENSOR

    OK

  76. CHECK SENSOR INSTALLATION (VVT SENSOR (FOR INTAKE CAMSHAFT))


    1. Check the tightening and installation condition of the VVT sensor (for intake camshaft) bolt.

    2. Check the connection of the VVT sensor (for intake camshaft) connector.

      OK
      Sensor is installed correctly.
      Result
      Proceed to
      OK
      NG

    NG

    SECURELY REINSTALL SENSOR (FOR INTAKE CAMSHAFT)

    OK

  77. CHECK SENSOR INSTALLATION (VVT SENSOR (FOR EXHAUST CAMSHAFT))


    1. Check the tightening and installation condition of the VVT sensor (for exhaust camshaft) bolt.

    2. Check the connection of the VVT sensor (for exhaust camshaft) connector.

      OK
      Sensor is installed correctly.
      Result
      Proceed to
      OK
      NG

    NG

    SECURELY REINSTALL SENSOR (FOR EXHAUST CAMSHAFT)

    OK

  78. CHECK HARNESS AND CONNECTOR (CRANKSHAFT POSITION SENSOR - ECM)


    1. Check the harnesses and connectors, referring to DTC P0335 inspection procedure.

      Click here

      Tech Tips


      • Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.

      • Make sure there is not an excessive amount of force applied to the wire harness.

      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  79. CHECK HARNESS AND CONNECTOR (VVT SENSOR (FOR INTAKE CAMSHAFT) - ECM)


    1. Check the harnesses and connectors, referring to DTC P0340 inspection procedure.

      Click here

      Tech Tips


      • Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.

      • Make sure there is not an excessive amount of force applied to the wire harness.

      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  80. CHECK HARNESS AND CONNECTOR (VVT SENSOR (FOR EXHAUST CAMSHAFT) - ECM)


    1. Check the harnesses and connectors, referring to DTC P0365 inspection procedure.

      Click here

      Tech Tips


      • Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.

      • Make sure there is not an excessive amount of force applied to the wire harness.

      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  81. REPLACE CRANKSHAFT POSITION SENSOR


    1. Replace the crankshaft position sensor.

      Click here

    2. Check the engine start operation.

      OK
      Malfunction has been repaired successfully.
      Result
      Proceed to
      OK
      NG

    OK

    END (CRANKSHAFT POSITION SENSOR IS DEFECTIVE)

    NG

  82. REPLACE VVT SENSOR (FOR INTAKE CAMSHAFT)


    1. Replace the VVT sensor (for intake camshaft).

      Click here

    2. Check the engine start operation.

      OK
      Malfunction has been repaired successfully.
      Result
      Proceed to
      OK
      NG

    OK

    END (VVT SENSOR (FOR INTAKE CAMSHAFT) IS DEFECTIVE)

    NG

  83. REPLACE VVT SENSOR (FOR EXHAUST CAMSHAFT)


    1. Replace the VVT sensor (for exhaust camshaft).

      Click here

    2. Check the engine start operation.

      OK
      Malfunction has been repaired successfully.
      Result
      Proceed to
      OK
      NG

    OK

    END (VVT SENSOR (FOR EXHAUST CAMSHAFT) IS DEFECTIVE)

    NG

    REPLACE ECM Click here

  84. READ VALUE USING GTS (ISC LEARNING VALUE)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Engine / Data List / All Data / ISC Learning Value.


      Powertrain > Engine > Data List
      Tester Display
      ISC Learning Value

    5. Start the engine and warm it up until the engine coolant temperature stabilizes with the A/C switch and all the accessory switches off.

      Result
      Data List Item Result Suspected Area Proceed to
      ISC Learning Value (Engine displacement (liters) x 0.9) or higher

      • Valve timing

      • Compression

      		 A
      Less than (engine displacement (liters) x 0.9) - B

    B

    INSPECT ENGINE COOLANT TEMPERATURE SENSOR Click here

    A

  85. CHECK CYLINDER COMPRESSION PRESSURE


    1. Check the compression.

      Click here

      Tech Tips

      Perform "Inspection After Repair" after repairing or replacing the engine assembly.

      Click here

      Result
      Proceed to
      OK
      NG

    OK

    ADJUST VALVE TIMING Click here

    NG

    CHECK AND REPAIR ENGINE ASSEMBLY

  86. INSPECT ENGINE COOLANT TEMPERATURE SENSOR


    1. Inspect the engine coolant temperature sensor.

      Click here

      Tech Tips

      Perform "Inspection After Repair" after replacing the engine coolant temperature sensor.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE ENGINE COOLANT TEMPERATURE SENSOR Click here

    OK

  87. CHECK FUEL PRESSURE

    Tech Tips

    For the fuel pressure inspection, refer to the following procedures.

    Click here


    1. Attach a fuel pressure gauge and check the fuel pressure when cranking the engine and after stopping the engine.

      Standard
      Vehicle State Specified Condition
      Cranking engine

      304 to 343 kPa (3.1 to 3.5 kgf/cm2, 44 to 50 psi)
      5 minutes after stopping engine

      147 kPa (1.5 kgf/cm2, 21 psi) or higher
      Result
      Proceed to
      OK
      NG

    NG

    PERFORM ACTIVE TEST USING GTS (CONTROL THE FUEL PUMP / SPEED) Click here

    OK

  88. READ VALUE USING GTS (LONG FT #1 AND LONG FT #2)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Engine / Data List / All Data / Long FT #1 and Long FT #2.


      Powertrain > Engine > Data List
      Tester Display
      Long FT #1
      Long FT #2
      Result
      Data List Item Result Suspected Area Proceed to
      Long FT #1, Long FT #2 -15 to 15%

      • Wire harness or connector

      • Fuel

      		 A
      15% or higher, or less than -15% Fuel injector assembly B

      Tech Tips

      Perform "Inspection After Repair" after replacing the fuel injector assembly.

      Click here


    B

    REPLACE FUEL INJECTOR ASSEMBLY Click here

    A

  89. PERFORM SIMULATION TEST


    1. Check if the idling speed after starting the engine is currently stable and has always been stable in the past.

      Result
      Problem Symptom Suspected Area Proceed to
      Current unstable idle speed or history of unstable idle speed Crankshaft position sensor system A
      All current and past idle speeds are stable Fuel B

      Tech Tips

      Through the customer problem analysis, confirm the fuel being used and the location at which the fuel was added to check if the malfunction is caused by the fuel in the vehicle.


    B

    REPLACE FUEL

    A

  90. CHECK SENSOR INSTALLATION (CRANKSHAFT POSITION SENSOR)


    1. Check the tightening and installation condition of the crankshaft position sensor bolt.

    2. Check the connection of the crankshaft position sensor connector.

      OK
      Sensor is installed correctly.
      Result
      Proceed to
      OK
      NG

    NG

    SECURELY REINSTALL SENSOR

    OK

  91. CHECK HARNESS AND CONNECTOR (CRANKSHAFT POSITION SENSOR - ECM)


    1. Check the harnesses and connectors, referring to DTC P0335 inspection procedure.

      Click here

      Tech Tips


      • Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.

      • Make sure there is not an excessive amount of force applied to the wire harness.

      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  92. REPLACE CRANKSHAFT POSITION SENSOR


    1. Replace the crankshaft position sensor.

      Click here

    2. Check the engine start operation.

      OK
      Malfunction has been repaired successfully.
      Result
      Proceed to
      OK
      NG

    OK

    END (CRANKSHAFT POSITION SENSOR IS DEFECTIVE)

    NG

    REPLACE ECM Click here

  93. PERFORM ACTIVE TEST USING GTS (CONTROL THE FUEL PUMP / SPEED)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Engine / Active Test / Control the Fuel Pump / Speed.


      Powertrain > Engine > Active Test
      Tester Display
      Control the Fuel Pump / Speed

    5. When performing the Active Test, check for fuel leakage from the fuel pipes.

      Result
      Result Proceed to
      Fuel leakage or signs of fuel leakage are present A
      No fuel leakage or signs of fuel leakage B

      Tech Tips


      • Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.

      • When performing the Active Test, if there is no operating noise from the fuel pump, the fuel pump system may be malfunctioning.

      • Check if the vehicle ran out of fuel, as engine starting trouble due to running out of fuel is also detected.


    A

    REPAIR OR REPLACE FUEL LINE

    B

  94. INSPECT FUEL PUMP


    1. Inspect the fuel pump.

      Click here

      Tech Tips


      • Make sure there is no foreign matter such as iron particles on the fuel pump and no signs that the fuel pump was stuck.

      • Make sure the internal connector is securely connected.

      • Make sure the fuel pump filter is not clogged.

      • Perform "Inspection After Repair" after replacing the fuel pump.

        Click here

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE FUEL PRESSURE REGULATOR ASSEMBLY Click here

    NG

    REPLACE FUEL PUMP Click here

  95. CHECK FUEL PRESSURE

    Tech Tips

    For the fuel pressure inspection, refer to the following procedures.

    Click here


    1. Attach a fuel pressure gauge and check the fuel pressure after stopping the engine.

      Standard
      147 kPa (1.5 kgf/cm2, 21 psi) or higher (5 minutes after stopping the engine)

      Tech Tips

      If the engine cannot be started, read the values after cranking the engine.

      Result
      Proceed to
      OK
      NG

    NG

    PERFORM ACTIVE TEST USING GTS (CONTROL THE FUEL PUMP / SPEED) Click here

    OK

  96. READ VALUE USING GTS (LONG FT #1 AND LONG FT #2)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Engine / Data List / All Data / Long FT #1 and Long FT #2.


      Powertrain > Engine > Data List
      Tester Display
      Long FT #1
      Long FT #2
      Result
      Data List Item Result Suspected Area Proceed to
      Long FT #1, Long FT #2 -15 to 15%

      • Wire harness or connector

      • Fuel

      		 A
      15% or higher, or less than -15% Fuel injector assembly B

      Tech Tips

      Perform "Inspection After Repair" after replacing the fuel injector assembly.

      Click here


    B

    REPLACE FUEL INJECTOR ASSEMBLY Click here

    A

  97. PERFORM SIMULATION TEST


    1. Check if the idling speed after starting the engine is currently stable and has always been stable in the past.

      Result
      Problem Symptom Suspected Area Proceed to
      Current unstable idling speed or history of unstable idling speed Crankshaft position sensor system A
      All current and past idling speeds are stable Fuel B

      Tech Tips

      Through the customer problem analysis, confirm the fuel being used and the location at which the fuel was added to check if the malfunction is caused by the fuel in the vehicle.


    B

    REPLACE FUEL

    A

  98. CHECK SENSOR INSTALLATION (CRANKSHAFT POSITION SENSOR)


    1. Check the tightening and installation condition of the crankshaft position sensor bolt.

    2. Check the connection of the crankshaft position sensor connector.

      OK
      Sensor is installed correctly.
      Result
      Proceed to
      OK
      NG

    NG

    SECURELY REINSTALL SENSOR

    OK

  99. CHECK HARNESS AND CONNECTOR (CRANKSHAFT POSITION SENSOR - ECM)


    1. Check the harnesses and connectors, referring to DTC P0335 inspection procedure.

      Click here

      Tech Tips


      • Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.

      • Make sure there is not an excessive amount of force applied to the wire harness.

      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  100. REPLACE CRANKSHAFT POSITION SENSOR


    1. Replace the crankshaft position sensor.

      Click here

    2. Check the engine start operation.

      OK
      Malfunction has been repaired successfully.
      Result
      Proceed to
      OK
      NG

    OK

    END (CRANKSHAFT POSITION SENSOR IS DEFECTIVE)

    NG

    REPLACE ECM Click here

  101. PERFORM ACTIVE TEST USING GTS (CONTROL THE FUEL PUMP / SPEED)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Engine / Active Test / Control the Fuel Pump / Speed.


      Powertrain > Engine > Active Test
      Tester Display
      Control the Fuel Pump / Speed

    5. When performing the Active Test, check for fuel leakage from the fuel pipes.

      Result
      Result Proceed to
      Fuel leakage or signs of fuel leakage are present A
      No fuel leakage or signs of fuel leakage B

      Tech Tips


      • Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.

      • When performing the Active Test, if there is no operating noise from the fuel pump, the fuel pump system may be malfunctioning.

      • Check if the vehicle ran out of fuel, as engine starting trouble due to running out of fuel is also detected.


    A

    REPAIR OR REPLACE FUEL LINE

    B

  102. INSPECT FUEL PUMP


    1. Inspect the fuel pump.

      Click here

      Tech Tips


      • Make sure there is no foreign matter such as iron particles on the fuel pump and no signs that the fuel pump was stuck.

      • Make sure the internal connector is securely connected.

      • Make sure the fuel pump filter is not clogged.

      • Perform "Inspection After Repair" after replacing the fuel pump.

        Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE FUEL PUMP Click here

    OK

  103. CHECK PURGE VSV

    B003ZLDC01
    *1 Purge VSV
    *2

    Fuel Vapor Feed Hose Assembly

    (to Canister)
    *3 Purge VSV connector

    1. Disconnect the fuel vapor feed hose assembly (on the canister side) of the purge VSV.

    2. Start the engine.

    3. Idle the engine.

    4. Disconnect the connector of the purge VSV.

    5. Check if air flows through the purge VSV.

      OK
      Air does not flow

      Tech Tips

      When this inspection is performed, the MIL may illuminate. After finishing the inspection, check and clear the DTCs.

      Result
      Proceed to
      OK
      NG

    NG

    INSPECT PURGE VSV Click here

    OK

  104. INSPECT FUEL INJECTOR ASSEMBLY


    1. Clean the inside of the intake manifold with compressed air.

    2. After stopping the engine, measure the HC concentration inside the intake manifold for 15 minutes.

      Result
      Result Proceed to
      4000 ppm or higher A
      Less than 4000 ppm B

      Tech Tips


      • If the concentration is 4000 ppm or higher, a fuel injector assembly may have a sealing problem.

      • Perform "Inspection After Repair" after replacing the fuel injector assembly.

        Click here


    A

    REPLACE FUEL INJECTOR ASSEMBLY Click here

    B

  105. CHECK INTAKE VALVE


    1. Check if carbon is on the intake valves.

      Result
      Result Proceed to
      Carbon present A
      No carbon present B

    A

    CLEAN INTAKE VALVE

    B

  106. READ VALUE USING GTS (ISC LEARNING VALUE)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Engine / Data List / All Data / ISC Learning Value.


      Powertrain > Engine > Data List
      Tester Display
      ISC Learning Value

    5. Start the engine and warm it up until the engine coolant temperature stabilizes with the A/C switch and all the accessory switches off.

      Result
      Data List Item Result Suspected Area Proceed to
      ISC Learning Value (Engine displacement (liters) x 0.9) or more

      • Valve timing

      • Compression

      		 A
      Less than (engine displacement (liters) x 0.9) - B

    B

    INSPECT ENGINE COOLANT TEMPERATURE SENSOR Click here

    A

  107. CHECK CYLINDER COMPRESSION PRESSURE


    1. Check the compression.

      Click here

      Tech Tips

      Perform "Inspection After Repair" after repairing or replacing the engine assembly.

      Click here

      Result
      Proceed to
      OK
      NG

    OK

    ADJUST VALVE TIMING Click here

    NG

    CHECK AND REPAIR ENGINE ASSEMBLY

  108. INSPECT ENGINE COOLANT TEMPERATURE SENSOR


    1. Inspect the engine coolant temperature sensor.

      Click here

      Tech Tips

      Perform "Inspection After Repair" after replacing the engine coolant temperature sensor.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE ENGINE COOLANT TEMPERATURE SENSOR Click here

    OK

  109. CHECK SENSOR INSTALLATION (CRANKSHAFT POSITION SENSOR)


    1. Check the tightening and installation condition of the crankshaft position sensor bolt.

    2. Check the connection of the crankshaft position sensor connector.

      OK
      Sensor is installed correctly.
      Result
      Proceed to
      OK
      NG

    NG

    SECURELY REINSTALL SENSOR

    OK

  110. CHECK SENSOR INSTALLATION (VVT SENSOR (FOR INTAKE CAMSHAFT))


    1. Check the tightening and installation condition of the VVT sensor (for intake camshaft) bolt.

    2. Check the connection of the VVT sensor (for intake camshaft) connector.

      OK
      Sensor is installed correctly.
      Result
      Proceed to
      OK
      NG

    NG

    SECURELY REINSTALL SENSOR (FOR INTAKE CAMSHAFT)

    OK

  111. CHECK SENSOR INSTALLATION (VVT SENSOR (FOR EXHAUST CAMSHAFT))


    1. Check the tightening and installation condition of the VVT sensor (for exhaust camshaft) bolt.

    2. Check the connection of the VVT sensor (for exhaust camshaft) connector.

      OK
      Sensor is installed correctly.
      Result
      Proceed to
      OK
      NG

    NG

    SECURELY REINSTALL SENSOR (FOR EXHAUST CAMSHAFT)

    OK

  112. CHECK HARNESS AND CONNECTOR (CRANKSHAFT POSITION SENSOR - ECM)


    1. Check the harnesses and connectors, referring to DTC P0335 inspection procedure.

      Click here

      Tech Tips


      • Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.

      • Make sure there is not an excessive amount of force applied to the wire harness.

      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  113. CHECK HARNESS AND CONNECTOR (VVT SENSOR (FOR INTAKE CAMSHAFT) - ECM)


    1. Check the harnesses and connectors, referring to DTC P0340 inspection procedure.

      Click here

      Tech Tips


      • Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.

      • Make sure there is not an excessive amount of force applied to the wire harness.

      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  114. CHECK HARNESS AND CONNECTOR (VVT SENSOR (FOR EXHAUST CAMSHAFT) - ECM)


    1. Check the harnesses and connectors, referring to DTC P0365 inspection procedure.

      Click here

      Tech Tips


      • Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.

      • Make sure there is not an excessive amount of force applied to the wire harness.

      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  115. REPLACE CRANKSHAFT POSITION SENSOR


    1. Replace the crankshaft position sensor.

      Click here

    2. Check the engine start operation.

      OK
      Malfunction has been repaired successfully.
      Result
      Proceed to
      OK
      NG

    OK

    END (CRANKSHAFT POSITION SENSOR IS DEFECTIVE)

    NG

  116. REPLACE VVT SENSOR (FOR INTAKE CAMSHAFT)


    1. Replace the VVT sensor (for intake camshaft).

      Click here

    2. Check the engine start operation.

      OK
      Malfunction has been repaired successfully.
      Result
      Proceed to
      OK
      NG

    OK

    END (VVT SENSOR (FOR INTAKE CAMSHAFT) IS DEFECTIVE)

    NG

  117. REPLACE VVT SENSOR (FOR EXHAUST CAMSHAFT)


    1. Replace the VVT sensor (for exhaust camshaft).

      Click here

    2. Check the engine start operation.

      OK
      Malfunction has been repaired successfully.
      Result
      Proceed to
      OK
      NG

    OK

    END (VVT SENSOR (FOR EXHAUST CAMSHAFT) IS DEFECTIVE)

    NG

    REPLACE ECM Click here