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 intelligent tester, 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. DTC Detection Condition Trouble Area
P1604

Either condition is met:


  • The engine speed is less than 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).

  • Immobiliser system (w/ immobiliser system)

  • Engine assembly (excess friction, compression loss)

  • Starter

  • Crankshaft position sensor

  • Camshaft position sensor

  • Engine coolant temperature sensor

  • Fuel pump

  • Fuel pump control circuit

  • Fuel pipes

  • Fuel line

  • Fuel injector

  • Throttle body with motor assembly

  • Pressure regulator

  • Battery

  • Flywheel

  • Spark plug

  • Ignition coil circuit

  • Intake system

  • Camshaft timing oil control valve assembly

  • Mass air flow meter

  • Air fuel ratio sensor

  • Valve timing

  • Fuel

  • Purge VSV

  • Intake valve

  • ECM
A01BDGXE01

INSPECTION PROCEDURE

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 these DTCs can be stored as a result of certain user actions, even if these DTCs are output, if the customer makes no mention of problems, clear these DTCs 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 intelligent tester. 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 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 reoccur, 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 ECM may be malfunctioning.

          A01BBMRE23

      2. All engine speeds recorded in the freeze frame data are between 100 and 250 rpm (the engine cranks but there is no combustion).

        Tech Tips

        If the engine speed is between 100 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.

          A01BEKXE33

      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.

          A01BBMRE24

    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 turnoff.

          Tech Tips

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

        5. The initial combustion and starter turnoff occur late.

          Tech Tips

          If the initial combustion and starter turnoff 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

      • Crankshaft position sensor

      • ECM

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

      • Fuel pump control circuit

      • Ignition system

      • Immobiliser system (w/ immobiliser system)

      • Engine coolant temperature sensor

      • Fuel injection system

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

      • Engine assembly (compression loss)

      • Fuel injection system

      • Fuel pump control circuit

      		 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 31
        Starting system

        • Starter (includes pinion gear wear or tooth damage)

        • Starting system
        Engine assembly

        • Engine assembly (excess friction)

        • Flywheel wear or tooth damage
        Cranking speed too low Battery malfunction

        • Battery fully depleted

        		 32 to 34
        Starting system

        • Starter
        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 leak

        • Fuel leak from fuel line

        • Fuel pump control circuit

        • Fuel pump

        		 35 to 49
        Ignition system malfunction

        • Spark plug

        • Crankshaft position sensor

        • Ignition coil
        Engine stalls after starter turnoff Air suction

        • Intake system connections

        		 50 to 55
        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
        The initial combustion and starter turnoff occur late Engine coolant temperature sensor malfunction

        • Engine coolant temperature sensor

        		 56 to 69
        Mass air flow meter malfunction

        • Mass air flow meter
        Abnormal A/F learned value

        • Air fuel ratio sensor
        Deviation from fuel injection characteristics

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

        • Spark plug
        Lack of fuel pressure

        • Pressure regulator

        • Fuel pump

        • Fuel pump control circuit

      2. Systems to Inspect

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

        • Fuel injector

        85 to 92

        93 to 100
        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 surge tank

        • Purge VSV system

        • Fuel injector

        		 101 to 103
        Fuel system troubleshooting C Injection signal system malfunction

        • Fuel injector assembly

        • Crankshaft position sensor

        • Camshaft position sensor

        • ECM

        		 71 to 75
        Intake system troubleshooting Difference between ISC target value and opening angle when idling

        • Engine assembly (compression loss)

        • Valve timing

        • Engine coolant temperature sensor

        • ECM

        82 to 84

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

        • Crankshaft position sensor system (including sensor installation)

        • Camshaft position sensor system (including sensor installation)

        • ECM

        76 to 81

        107 to 112

PROCEDURE


  1. CHECK FOR ANY OTHER DTCS OUTPUT AND RECORD FREEZE FRAME DATA


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

    3. Enter the following menus: Powertrain / Engine and ECT / DTC.

    4. A01BFY8E53

      Read the DTCs and record the freeze frame data.

      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 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 ENGINE IMMOBILISER SYSTEM

    Tech Tips

    If the vehicle is not equipped with an immobiliser system, proceed to the next step (OK).


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the intelligent tester on.

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

    5. Read the value displayed on the intelligent tester.

      OK
      Immobiliser Fuel Cut is 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.


    NG

    REPAIR ENGINE IMMOBILISER SYSTEM Click here

    OK

  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

    CONFIRM PROBLEM SYMPTOM Click here

    A

  4. READ FREEZE FRAME DATA


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

    3. Using the intelligent tester, 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 below 5 V Battery fully depleted A
      Minimum voltage is 5 V or higher

      • Starter malfunction

      • Crankshaft position sensor system (w/ immobiliser system)

      • Excess engine friction

      • ECM

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

      • Fuel pump control circuit

      • Ignition system

      • Engine coolant temperature sensor

      • Immobiliser system

      • Fuel injection system

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

      • Engine assembly

      • Fuel injection system

      • Fuel pump control circuit

      		 D

      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


    B

    READ FREEZE FRAME DATA Click here

    C

    READ FREEZE FRAME DATA Click here

    D

    READ FREEZE FRAME DATA Click here

    E

    INSPECT MASS AIR FLOW METER Click here

    A

    CHARGE OR REPLACE BATTERY

  5. READ FREEZE FRAME DATA


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

    3. Using the intelligent tester, 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


      • A01BI1QE01

        *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.


    B

    CHECK SENSOR INSTALLATION (CRANKSHAFT POSITION SENSOR) Click here

    C

    CHECK AND REPAIR ENGINE OR BATTERY

    A

    CHECK STARTER SIGNAL CIRCUIT Click here

  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.

    NG

    SECURELY REINSTALL SENSOR Click here

    OK

  7. CHECK CRANKSHAFT POSITION SENSOR


    1. Disconnect the crankshaft position sensor connector.

    2. Check for oil on the connector terminals.

      OK
      No oil on the terminals.

    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.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  9. CHECK CRANKSHAFT POSITION SENSOR


    1. Replace the crankshaft position sensor Click here.

    2. Check the engine start operation.

      OK
      Malfunction has been repaired successfully.

    NG

    REPLACE ECM Click here

    OK

    END (CRANKSHAFT POSITION SENSOR IS DEFECTIVE)

  10. READ FREEZE FRAME DATA


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

    3. Using the intelligent tester, 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, Ambient Temp for A/C Coolant Temp, Ambient Temp for A/C Fuel Pump/Speed Status
      Difference between Coolant Temp, Ambient Temp for A/C and Intake Air is 10°C (18°F) or more*1 Coolant Temp is 125°C (257°F) or higher, or below Ambient Temp for A/C by 15°C (27°F) or more - Engine coolant temperature sensor A
      Other than above All 5 sets of freeze frame data are ON - B
      At least 1 of the 5 sets of freeze frame data is OFF Fuel pump control circuit C
      Difference between Coolant Temp, Ambient Temp for A/C and Intake Air is less than 10°C (18°F)*2 - At least 1 of the 5 sets of freeze frame data is OFF Fuel pump control circuit C
      All 5 sets of freeze frame data are ON - B

      Tech Tips


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

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


    B

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

    C

    CHECK FUEL PUMP CONTROL CIRCUIT Click here

    A

    REPLACE ENGINE COOLANT TEMPERATURE SENSOR Click here

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


    1. Connect the intelligent tester to the DLC3.

    2. Disconnect the connector from the fuel suction tube.

    3. Turn the ignition switch to ON.

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

    5. A01BAMME22
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Fuel Pump)

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      h2-4 - 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.


    NG

    CHECK FUEL PUMP CONTROL CIRCUIT Click here

    OK

  12. CHECK TERMINAL VOLTAGE (POWER SOURCE OF FUEL INJECTOR)


    1. Check the harnesses and connectors, referring to Fuel Injector Circuit 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.


    NG

    REPAIR FUEL INJECTOR POWER SOURCE CIRCUIT Click here

    OK

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


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

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

    4. 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.


    B

    CHECK FUEL SYSTEM Click here

    A

    REPAIR OR REPLACE FUEL LINE

  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

    B

    PERFORM SIMULATION TEST Click here

    A

    REPAIR OR REPLACE FUEL SYSTEM

  15. READ FREEZE FRAME DATA


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

    3. Using the intelligent tester, 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, Ambient Temp for A/C, Intake Air Coolant Temp, Ambient Temp for A/C Long FT Engine Speed
      Difference between Coolant Temp, Ambient Temp for A/C and Intake Air is 10°C (18°F) or more Coolant Temp is 125°C (257°F) or higher, or below Ambient Temp for A/C by 15°C (27°F) or more - - Engine coolant temperature sensor A
      Other than above -15% or less, or +15% or more -

      • Fuel pump control circuit

      • Fuel injector

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

      • Fuel system

      • Intake air system

      		 D
      Difference between Coolant Temp, Ambient Temp for A/C and Intake Air is less than 10°C (18°F) - -15% or less, or +15% or more -

      • Fuel pump control circuit

      • Fuel injector

      		 B
      -15 to +15% Minimum speed is 300 rpm or more*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.


    B

    INSPECT FUEL INJECTOR Click here

    C

    CHECK AND REPAIR ENGINE

    D

    READ FREEZE FRAME DATA Click here

    A

    REPLACE ENGINE COOLANT TEMPERATURE SENSOR Click here

  16. INSPECT FUEL INJECTOR


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

      OK
      No carbon present.

    NG

    REPLACE FUEL INJECTOR Click here

    OK

  17. 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

    B

    PERFORM SIMULATION TEST Click here

    A

    REPAIR OR REPLACE FUEL SYSTEM

  18. READ FREEZE FRAME DATA


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

    3. Using the intelligent tester, 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 A
      Engine coolant temperature is 40 to 90°C (104 to 194°F)*2 Fuel injector B
      Engine coolant temperature is 90°C (194°F) or higher*3 Pressure regulator A

      Tech Tips

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

      *2: 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 assembly.

      *3: If the engine coolant temperature is 90°C (194°F) or more (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 of the pressure regulator to maintain fuel pressure after stopping the engine.


    B

    INSPECT FUEL INJECTOR Click here

    A

  19. CHECK FUEL PRESSURE


    1. Check the fuel pressure Click here.

      Tech Tips

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

      Result
      Result Proceed to
      Abnormal A
      Normal B

    B

    PERFORM SIMULATION TEST Click here

    A

    REPLACE FUEL PRESSURE REGULATOR ASSEMBLY

  20. INSPECT FUEL INJECTOR


    1. Clean the inside of the surge tank with compressed air.

    2. After stopping the engine, measure the HC concentration inside the surge tank for 15 minutes.

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

      Tech Tips

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


    B

    INSPECT THROTTLE BODY WITH MOTOR ASSEMBLY Click here

    A

  21. INSPECT FUEL INJECTOR


    1. Inspect the fuel injector Click here.

      Result
      Result Proceed to
      Abnormal A
      Normal B

    B

    INSPECT THROTTLE BODY WITH MOTOR ASSEMBLY Click here

    A

    REPLACE FUEL INJECTOR Click here

  22. INSPECT THROTTLE BODY WITH MOTOR ASSEMBLY


    1. Check if carbon is in the airflow passage.

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

    B

    CHECK INTAKE SYSTEM Click here

    A

    CLEAN OR REPLACE THROTTLE BODY WITH MOTOR ASSEMBLY Click here

  23. CHECK INTAKE SYSTEM


    1. Check the intake system for vacuum leaks.

      OK
      No leaks in intake system.

    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

    B

    CONFIRM PROBLEM SYMPTOM Click here

    A

    END

  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 (includes pinion gear wear or tooth damage)

      • Starter system

      • Engine assembly (excess friction)

      • Flywheel wear or tooth damage

      		 A
      Abnormal cranking speed

      • Battery fully depleted

      • Starter

      • Engine assembly (excess friction, compression loss)

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

      • Pressure regulator fuel pressure maintenance

      • Fuel injector leak

      • Fuel leak from fuel line

      • Fuel pump control circuit

      • Fuel pump

      • Spark plug

      • Crankshaft position sensor system

      • Ignition coil 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

      • Mass air flow meter system

      		 D
      The initial combustion and starter turnoff occur late*3

      • Engine coolant temperature sensor

      • Mass air flow meter

      • Air fuel ratio sensor

      • Heated oxygen sensor

      • Fuel injector

      • Spark plug

      • Pressure regulator

      • Fuel pump

      • Fuel pump control circuit

      		 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 turnoff, the air-fuel ratio may be incorrect or the camshaft timing oil control valve may have a problem returning.

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


    B

    PERFORM SIMULATION TEST Click here

    C

    INSPECT FUEL INJECTOR Click here

    D

    INSPECT MASS AIR FLOW METER 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

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

      • Flywheel

      • Starter

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

      • Battery

      • Starter

      • Starter system

      		 C

      Tech Tips

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


    B

    INSPECT STARTER (STARTER PINION GEAR) Click here

    C

    INSPECT BATTERY Click here

    A

  27. INSPECT BATTERY


    1. Inspect the battery Click here.


    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.


    NG

    REPAIR OR REPLACE ENGINE ASSEMBLY

    OK

    INSPECT STARTER Click here

  29. INSPECT STARTER (STARTER PINION GEAR)


    1. Remove the starter Click here.

    2. Check for starter pinion gear wear and damage.

      OK
      There is no wear or damage.

    NG

    REPLACE STARTER Click here

    OK

    REPLACE FLYWHEEL Click here

  30. INSPECT BATTERY


    1. Inspect the battery Click here.


    NG

    CHARGE OR REPLACE BATTERY

    OK

  31. INSPECT STARTER


    1. Inspect the starter Click here.


    NG

    REPLACE STARTER Click here

    OK

    CHECK STARTER SIGNAL CIRCUIT Click here

  32. 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

      • Excess engine friction

      		 A
      Cranking speed is fast (300 rpm or more)*1 Engine compression loss B

      Tech Tips

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


    B

    CHECK AND REPAIR ENGINE

    A

  33. INSPECT BATTERY


    1. Inspect the battery Click here.


    NG

    CHARGE OR REPLACE BATTERY

    OK

  34. CHECK ENGINE


    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.


    NG

    REPAIR OR REPLACE ENGINE

    OK

    INSPECT STARTER Click here

  35. INSPECT FUEL INJECTOR


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

      OK
      Fuel injector operating noise is heard.

    NG

    READ VALUE USING INTELLIGENT TESTER (ENGINE SPEED) Click here

    OK

  36. CHECK FUEL PRESSURE


    1. Inspect the fuel pressure Click here.


    NG

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

    OK

  37. CHECK SPARK PLUG AND SPARK


    1. Check for sparks Click here.


    NG

    INSPECT SPARK PLUG Click here

    OK

  38. 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 is stuck open A
      When the engine is stopped and approximately 15 to 120 minutes have passed, engine starting trouble occurs*2 Fuel injector leak B
      When the engine is stopped and approximately 2 to 3 minutes have passed, engine starting trouble occurs*3 Failure to maintain fuel pressure by pressure regulator A
      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 of the system to maintain fuel pressure after stopping the engine.

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

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

      *4: From step 70, perform fuel system troubleshooting C (steps 71 to 75).


    B

    INSPECT FUEL INJECTOR Click here

    C

    CHECK MALFUNCTION CONDITION Click here

    A

  39. 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.

      Result
      Result Proceed to

      Below 147 kPa (1.5 kgf/cm2) (5 minutes after stopping the engine)

      		 A

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

      		 B*1

      Tech Tips


      • If the engine cannot be started, check the fuel pressure after cranking the engine.

      • *1: From step 70, perform fuel system troubleshooting C (steps 71 to 75).


    B

    CHECK MALFUNCTION CONDITION Click here

    A

    REPLACE FUEL PRESSURE REGULATOR ASSEMBLY

  40. INSPECT FUEL INJECTOR


    1. After stopping the engine, measure the HC concentration inside the surge tank for 15 minutes.

      Result
      Result Proceed to
      4000 ppm or more A
      Less than 4000 ppm B*1

      Tech Tips


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

      • *1: From step 70, perform fuel system troubleshooting C (steps 71 to 75).


    B

    CHECK MALFUNCTION CONDITION Click here

    A

    REPLACE FUEL INJECTOR Click here

  41. 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.


    NG

    REPLACE SPARK PLUG

    OK

  42. READ VALUE USING INTELLIGENT TESTER (ENGINE SPEED)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

    3. Enter the following menus: Powertrain / Engine and ECT / Data List / Engine Speed.

    4. Start the engine.

    5. While running the engine, read the value of Engine Speed.

      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.


    NG

    CHECK CRANKSHAFT POSITION SENSOR CIRCUIT Click here

    OK

  43. CHECK TERMINAL VOLTAGE (POWER SOURCE OF IGNITION COIL)


    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.


    NG

    CHECK IGNITION COIL POWER SOURCE CIRCUIT Click here

    OK

  44. CHECK HARNESS AND CONNECTOR (IGNITION COIL - ECM)


    1. Check 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 70 and perform troubleshooting for the ignition system (steps 76 to 81).


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE IGNITION COIL

  45. PERFORM ACTIVE TEST USING INTELLIGENT TESTER (CONTROL THE FUEL PUMP / SPEED)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

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

    4. 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.


    NG

    CHECK FUEL PUMP CONTROL CIRCUIT Click here

    OK

  46. PERFORM ACTIVE TEST USING INTELLIGENT TESTER (CONTROL THE FUEL PUMP / SPEED)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

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

    4. 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 circuit, check if engine starting trouble occurs again. If engine starting trouble occurs again, proceed to step 70 and perform fuel system troubleshooting (steps 71 to 75).


    B

    CHECK FUEL PUMP CONTROL CIRCUIT Click here

    A

    REPAIR OR REPLACE FUEL LINE

  47. READ VALUE USING INTELLIGENT TESTER (ENGINE SPEED)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

    3. Enter the following menus: Powertrain / Engine and ECT / Data List / Engine Speed.

    4. Start the engine.

    5. While running the engine, read the value of Engine Speed.

      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.


    NG

    REPLACE CRANKSHAFT POSITION SENSOR Click here

    OK

  48. CHECK TERMINAL VOLTAGE (POWER SOURCE OF FUEL INJECTOR)


    1. Check the harnesses and connectors, referring to Fuel Injector Circuit 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.


    NG

    REPAIR FUEL INJECTOR POWER SOURCE CIRCUIT Click here

    OK

  49. CHECK HARNESS AND CONNECTOR (FUEL INJECTOR - ECM)


    1. Check the harnesses and connectors, referring to Fuel Injector Circuit 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.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE ECM Click here

  50. INSPECT MASS AIR FLOW METER


    1. Inspect the mass air flow meter Click here.


    NG

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

    OK

  51. CHECK INTAKE SYSTEM


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

      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.

    NG

    REPAIR OR REPLACE INTAKE SYSTEM

    OK

  52. 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

    3. Reconnect the throttle body with motor assembly connector.

      Tech Tips

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


    B

    PERFORM ACTIVE TEST USING INTELLIGENT TESTER (CONTROL THE VVT SYSTEM) Click here

    A

  53. INSPECT THROTTLE BODY WITH MOTOR ASSEMBLY


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

      OK
      No carbon present.

    NG

    REMOVE FOREIGN OBJECT AND CLEAN THROTTLE BODY WITH MOTOR ASSEMBLY

    OK

  54. PERFORM ACTIVE TEST USING INTELLIGENT TESTER (CONTROL THE VVT SYSTEM)


    1. Performing the Active Test, referring to DTC P0011 inspection procedure Click here.

      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.

      • If the camshaft timing oil control valve is stuck ON, the valve overlap increases and combustion worsens due to the internal EGR which may cause rough idle or cause the engine to stall.

      • *: From step 70, perform intake system troubleshooting (steps 82 to 84). If engine starting trouble still occurs, perform fuel system troubleshooting A (steps 85 to 92).

      Result
      Result Proceed to
      NG A
      OK* B

    B

    CHECK MALFUNCTION CONDITION Click here

    A

    REPLACE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY Click here

  55. CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER - 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 70 and perform intake system troubleshooting (steps 82 to 84). If engine starting trouble still occurs, perform fuel system troubleshooting A (steps 85 to 92).


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE MASS AIR FLOW METER Click here

  56. 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 70 and perform fuel system troubleshooting A (steps 93 to 100), fuel system troubleshooting B (steps 101 to 103), intake system troubleshooting (steps 104 to 106), and ignition system troubleshooting (steps 107 to 112), in that order.


    NG

    REPLACE ENGINE COOLANT TEMPERATURE SENSOR Click here

    OK

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


    1. Check the harnesses and connectors, referring to DTC P0115 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 70 and perform fuel system troubleshooting A (steps 93 to 100), fuel system troubleshooting B (steps 101 to 103), intake system troubleshooting (steps 104 to 106), and ignition system troubleshooting (steps 107 to 112), in that order.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  58. INSPECT MASS AIR FLOW METER


    1. Inspect the mass air flow meter Click here.

      Tech Tips

      If the mass air flow meter 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 70 and perform fuel system troubleshooting A (steps 93 to 100), fuel system troubleshooting B (steps 101 to 103), intake system troubleshooting (steps 104 to 106), and ignition system troubleshooting (steps 107 to 112), in that order.


    NG

    REPLACE MASS AIR FLOW METER Click here

    OK

  59. CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER - 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 70 and perform fuel system troubleshooting A (steps 93 to 100), fuel system troubleshooting B (steps 101 to 103), intake system troubleshooting (steps 104 to 106), and ignition system troubleshooting (steps 107 to 112), in that order.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  60. READ VALUE USING INTELLIGENT TESTER


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

    3. Enter the following menus: Powertrain / Engine and ECT / Data List / Long FT and Atmosphere Pressure.

      Result
      Data List Item Result Suspected Area Proceed to
      Long FT#1 +25% or more or less than -25%

      • Air fuel ratio sensor

      • Heated oxygen sensor

      • Mass air flow meter

      • Fuel injector

      • ECM

      		 A
      Atmosphere Pressure 80 kPa or less (when elevation is 0 m)
      Both Data List items listed above Values are other than above - B

    B

    CHECK FUEL PRESSURE Click here

    A

  61. PERFORM SIMULATION TEST


    1. Remove the EFI and ETCS fuses from the engine room relay block.

    2. After 60 seconds or more elapse, install the EFI and ETCS fuses.

    3. Check if the engine can be started.

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

    B

    CHECK FUEL PRESSURE Click here

    A

  62. INSPECT AIR FUEL RATIO SENSOR

    A01BE4GE27

    1. Connect the intelligent tester to the DLC3.

    2. Start the engine.

    3. Turn the intelligent tester on.

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

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

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

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

    8. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Injection Volume for A/F Sensor.

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

      Standard Voltage
      Intelligent Tester Display Injection Volume Specified Condition
      AFS Voltage B1S1 +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 70 and perform fuel system troubleshooting A (steps 93 to 100), fuel system troubleshooting B (steps 101 to 103), intake system troubleshooting (steps 104 to 106), and ignition system troubleshooting (steps 107 to 112), in that order.


    NG

    REPLACE AIR FUEL RATIO SENSOR Click here

    OK

  63. PERFORM SIMULATION TEST


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

      OK
      Speed is stable.

      Tech Tips

      After replacing the fuel injector or mass air flow meter, check if engine starting trouble occurs again. If engine starting trouble occurs, replace the ECM. If engine starting trouble still occurs, proceed to step 70 and perform fuel system troubleshooting A (steps 93 to 100), fuel system troubleshooting B (steps 101 to 103), intake system troubleshooting (steps 104 to 106), and ignition system troubleshooting (steps 107 to 112), in that order.


    NG

    REPLACE FUEL INJECTOR Click here

    OK

    REPLACE MASS AIR FLOW METER Click here

  64. CHECK FUEL PRESSURE


    1. Inspect the fuel pressure Click here.


    NG

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

    OK

  65. 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 70 and perform fuel system troubleshooting A (steps 93 to 100), fuel system troubleshooting B (steps 101 to 103), intake system troubleshooting (steps 104 to 106), and ignition system troubleshooting (steps 107 to 112), 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 70 and perform fuel system troubleshooting A (steps 93 to 100), fuel system troubleshooting B (steps 101 to 103), intake system troubleshooting (steps 104 to 106), and ignition system troubleshooting (steps 107 to 112), in that order.

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


    B

    REPLACE SPARK PLUG (ABNORMAL CYLINDER)

    C

    REPLACE SPARK PLUG (ALL CYLINDER)

    A

  66. 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 is stuck open A
      When the engine is stopped and approximately 15 to 120 minutes have passed, engine starting trouble occurs*2 Fuel injector leak B
      When the engine is stopped and approximately 2 to 3 minutes have passed, engine starting trouble occurs*3 Failure to maintain fuel pressure by pressure regulator A
      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 of the system to maintain fuel pressure after stopping the engine.

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

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

      *4: From step 70, perform fuel system troubleshooting A (steps 93 to 100), fuel system troubleshooting B (steps 101 to 103), intake system troubleshooting (steps 104 to 106), and ignition system troubleshooting (steps 107 to 112), in that order.


    B

    INSPECT FUEL INJECTOR Click here

    C

    CHECK MALFUNCTION CONDITION Click here

    A

  67. 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.

      Result
      Result Proceed to

      Below 147 kPa (1.5 kgf/cm2) (5 minutes after stopping the engine)

      		 A

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

      		 B*

      Tech Tips


      • If the engine cannot be started, check the fuel pressure after cranking the engine.

      • *: From step 70, perform fuel system troubleshooting A (steps 93 to 100), fuel system troubleshooting B (steps 101 to 103), intake system troubleshooting (steps 104 to 106), and ignition system troubleshooting (steps 107 to 112), in that order.


    B

    CHECK MALFUNCTION CONDITION Click here

    A

    REPLACE FUEL PRESSURE REGULATOR ASSEMBLY

  68. INSPECT FUEL INJECTOR


    1. Clean the inside of the surge tank with compressed air.

    2. After stopping the engine, measure the HC concentration inside the surge tank for 15 minutes.

      Result
      Result Proceed to
      4000 ppm or more A
      Less than 4000 ppm B*

      Tech Tips


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

      • *: From step 70, perform fuel system troubleshooting A (steps 93 to 100), fuel system troubleshooting B (steps 101 to 103), intake system troubleshooting (steps 104 to 106), and ignition system troubleshooting (steps 107 to 112), in that order.


    B

    CHECK MALFUNCTION CONDITION Click here

    A

    REPLACE FUEL INJECTOR Click here

  69. PERFORM ACTIVE TEST USING INTELLIGENT TESTER (CONTROL THE FUEL PUMP / SPEED)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

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

    4. 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 circuit, check if engine starting trouble occurs again. If engine starting trouble still occurs, proceed to step 70 and perform fuel system troubleshooting A (steps 93 to 100), fuel system troubleshooting B (steps 101 to 103), intake system troubleshooting (steps 104 to 106), and ignition system troubleshooting (steps 107 to 112), in that order.


    B

    CHECK FUEL PUMP CONTROL CIRCUIT Click here

    A

    REPAIR OR REPLACE FUEL LINE

  70. CHECK MALFUNCTION CONDITION


    1. If the malfunction could not be identified during the inspections in steps 38, 39, 40 and 46, perform fuel system troubleshooting C (steps 71 to 75).

      Result
      Performed Step Troubleshooting by System Procedure Proceed to
      Steps 38, 39, 40 and 46 Fuel system troubleshooting C 71 to 75 A

    2. If the malfunction could not be identified during the inspection in step 44, perform ignition system troubleshooting (steps 76 to 81).

      Result
      Performed Step Troubleshooting by System Procedure Proceed to
      Step 44 Ignition system troubleshooting 76 to 81 B

    3. If the malfunction could not be identified during the inspections in steps 54 and 55, perform intake air system troubleshooting (steps 82 to 84). If engine starting trouble still occurs, perform fuel system troubleshooting A (steps 85 to 92).

      Result
      Performed Step Troubleshooting by System Procedure Proceed to
      Step 54 and 55 Intake air system troubleshooting 82 to 84 C
      Fuel system troubleshooting A 85 to 92

    4. If the malfunction could not be identified during the inspections in steps 56, 57, 58, 59, 62, 63, 65, 66, 67, 68 and 69, perform fuel system troubleshooting A (steps 93 to 100), fuel system troubleshooting B (steps 101 to 103), intake air system troubleshooting (steps 104 to 106), and ignition system troubleshooting (steps 107 to 112), in that order.

      Result
      Performed Step Troubleshooting by System Procedure Proceed to
      Steps 56, 57, 58, 59, 62, 63, 65, 66, 67, 68 and 69 Fuel system troubleshooting A 93 to 100 D
      Fuel system troubleshooting B 101 to 103
      Intake air system troubleshooting 104 to 106
      Ignition system troubleshooting 107 to 112

    B

    CHECK SENSOR INSTALLATION (CRANKSHAFT POSITION SENSOR) Click here

    C

    READ VALUE USING INTELLIGENT TESTER (ISC LEARNING VALUE) Click here

    D

    CHECK FUEL PRESSURE Click here

    A

  71. INSPECT FUEL INJECTOR


    1. Inspect the fuel injector Click here.


    NG

    REPLACE FUEL INJECTOR Click here

    OK

  72. CHECK TERMINAL VOLTAGE (POWER SOURCE OF FUEL INJECTOR)


    1. Check the harnesses and connectors, referring to Fuel Injector Circuit 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.


    NG

    CHECK FUEL INJECTOR POWER SOURCE CIRCUIT Click here

    OK

  73. CHECK HARNESS AND CONNECTOR (FUEL INJECTOR - ECM)


    1. Check the harnesses and connectors, referring to Fuel Injector Circuit 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.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  74. CHECK CRANKSHAFT POSITION SENSOR


    1. Replace the crankshaft position sensor Click here.

    2. Check the engine start operation.

      OK
      Malfunction has been repaired successfully.

    NG

    CHECK CAMSHAFT POSITION SENSOR Click here

    OK

    END (CRANKSHAFT POSITION SENSOR IS DEFECTIVE)

  75. CHECK CAMSHAFT POSITION SENSOR


    1. Replace the camshaft position sensor Click here.

    2. Check the engine start operation.

      OK
      Malfunction has been repaired successfully.

    NG

    REPLACE ECM Click here

    OK

    END (CAMSHAFT POSITION SENSOR IS DEFECTIVE)

  76. 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.

    NG

    SECURELY REINSTALL CRANKSHAFT POSITION SENSOR Click here

    OK

  77. CHECK SENSOR INSTALLATION (CAMSHAFT POSITION SENSOR)


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

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

      OK
      Sensor is installed correctly.

    NG

    SECURELY REINSTALL CAMSHAFT POSITION SENSOR Click here

    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.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  79. CHECK HARNESS AND CONNECTOR (CAMSHAFT POSITION SENSOR - 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.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  80. CHECK CRANKSHAFT POSITION SENSOR


    1. Replace the crankshaft position sensor Click here.

    2. Check the engine start operation.

      OK
      Malfunction has been repaired successfully.

    NG

    CHECK CAMSHAFT POSITION SENSOR Click here

    OK

    END (CRANKSHAFT POSITION SENSOR IS DEFECTIVE)

  81. CHECK CAMSHAFT POSITION SENSOR


    1. Replace the camshaft position sensor Click here.

    2. Check the engine start operation.

      OK
      Malfunction has been repaired successfully.

    NG

    REPLACE ECM Click here

    OK

    END (CAMSHAFT POSITION SENSOR IS DEFECTIVE)

  82. READ VALUE USING INTELLIGENT TESTER (ISC LEARNING VALUE)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

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

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

      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

  83. CHECK CYLINDER COMPRESSION PRESSURE


    1. Check the compression Click here.


    NG

    CHECK AND REPAIR ENGINE ASSEMBLY

    OK

    CHECK VALVE TIMING

  84. INSPECT ENGINE COOLANT TEMPERATURE SENSOR


    1. Inspect the engine coolant temperature sensor Click here.


    NG

    REPLACE ENGINE COOLANT TEMPERATURE SENSOR Click here

    OK

  85. 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)
      5 minutes after stopping engine

      147 kPa (1.5 kgf/cm2) or higher

    NG

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

    OK

  86. READ VALUE USING INTELLIGENT TESTER (LONG FT)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

    3. Enter the following menus: Powertrain / Engine and ECT / Data List / Long FT#1.

      Result
      Data List Item Result Suspected Area Proceed to
      Long FT#1 -15 to +15%

      • Wire harness or connector

      • Fuel

      		 A
      +15% or more, or less than -15% Fuel injector B

    B

    REPLACE FUEL INJECTOR Click here

    A

  87. PERFORM SIMULATION TEST


    1. Check if the idling speed is stable after starting the engine and if an unstable idling speed has ever occurred 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

  88. 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.

    NG

    SECURELY REINSTALL CRANKSHAFT POSITION SENSOR Click here

    OK

  89. 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.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  90. CHECK CRANKSHAFT POSITION SENSOR


    1. Replace the crankshaft position sensor Click here.

    2. Check the engine start operation.

      OK
      Malfunction has been repaired successfully.

    NG

    REPLACE ECM Click here

    OK

    END (CRANKSHAFT POSITION SENSOR IS DEFECTIVE)

  91. PERFORM ACTIVE TEST USING INTELLIGENT TESTER (CONTROL THE FUEL PUMP / SPEED)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

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

    4. 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.


    B

    INSPECT FUEL PUMP Click here

    A

    REPAIR OR REPLACE FUEL LINE

  92. 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.


    NG

    REPLACE FUEL PUMP Click here

    OK

    REPLACE FUEL PRESSURE REGULATOR

  93. 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.

      Result
      Result Proceed to

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

      		 A

      Below 147 kPa (1.5 kgf/cm2) (5 minutes after stopping the engine)

      		 B

    B

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

    A

  94. READ VALUE USING INTELLIGENT TESTER (LONG FT#1)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

    3. Enter the following menus: Powertrain / Engine and ECT / Data List / Long FT#1.

      Result
      Data List Item Result Suspected Area Proceed to
      Long FT#1 -15 to +15%

      • Wire harness or connector

      • Fuel

      		 A
      +15% or more, or less than -15% Fuel injector B

    B

    REPLACE FUEL INJECTOR Click here

    A

  95. PERFORM SIMULATION TEST


    1. Check if the idling speed is stable after starting the engine and if an unstable idling speed has ever occurred 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

  96. 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.

    NG

    SECURELY REINSTALL CRANKSHAFT POSITION SENSOR Click here

    OK

  97. 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.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  98. CHECK CRANKSHAFT POSITION SENSOR


    1. Replace the crankshaft position sensor Click here.

    2. Check the engine start operation.

      OK
      Malfunction has been repaired successfully.

    NG

    REPLACE ECM Click here

    OK

    END (CRANKSHAFT POSITION SENSOR IS DEFECTIVE)

  99. PERFORM ACTIVE TEST USING INTELLIGENT TESTER (CONTROL THE FUEL PUMP / SPEED)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

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

    4. 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.


    B

    INSPECT FUEL PUMP Click here

    A

    REPAIR OR REPLACE FUEL LINE

  100. 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.


    NG

    REPLACE FUEL PUMP Click here

    OK

  101. CHECK PURGE VSV


    1. A01BA5S

      Disconnect the purge hose (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.

    6. Connect the connector of the purge VSV.

    7. Connect the purge hose of the purge VSV.

      Tech Tips

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


    NG

    INSPECT PURGE VSV

    OK

  102. CHECK FUEL INJECTOR


    1. Clean the inside of the surge tank with compressed air.

    2. After stopping the engine, measure the HC concentration inside the surge tank for 15 minutes.

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

      Tech Tips

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


    B

    CHECK INTAKE VALVE Click here

    A

    REPLACE FUEL INJECTOR Click here

  103. CHECK INTAKE VALVE


    1. Check if carbon is on the intake valves.

      Result
      Result Proceed to
      Carbon present A
      No carbon present B

    B

    READ VALUE USING INTELLIGENT TESTER (ISC LEARNING VALUE) Click here

    A

    CLEAN INTAKE VALVE

  104. READ VALUE USING INTELLIGENT TESTER (ISC LEARNING VALUE)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

    3. Start the engine, turn off all accessory switches and warm up the engine until the engine coolant temperature stabilizes.

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

      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

  105. CHECK CYLINDER COMPRESSION PRESSURE


    1. Inspect the compression Click here.


    NG

    CHECK AND REPAIR ENGINE ASSEMBLY

    OK

    CHECK VALVE TIMING

  106. INSPECT ENGINE COOLANT TEMPERATURE SENSOR


    1. Inspect the engine coolant temperature sensor Click here.


    NG

    REPLACE ENGINE COOLANT TEMPERATURE SENSOR Click here

    OK

  107. 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.

    NG

    SECURELY REINSTALL CRANKSHAFT POSITION SENSOR Click here

    OK

  108. CHECK SENSOR INSTALLATION (CAMSHAFT POSITION SENSOR)


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

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

      OK
      Sensor is installed correctly.

    NG

    SECURELY REINSTALL CAMSHAFT POSITION SENSOR Click here

    OK

  109. 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.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  110. CHECK HARNESS AND CONNECTOR (CAMSHAFT POSITION SENSOR - 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.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  111. CHECK CRANKSHAFT POSITION SENSOR


    1. Replace the crankshaft position sensor Click here.

    2. Check the engine start operation.

      OK
      Malfunction has been repaired successfully.

    NG

    CHECK CAMSHAFT POSITION SENSOR Click here

    OK

    END (CRANKSHAFT POSITION SENSOR IS DEFECTIVE)

  112. CHECK CAMSHAFT POSITION SENSOR


    1. Replace the camshaft position sensor Click here.

    2. Check the engine start operation.

      OK
      Malfunction has been repaired successfully.

    NG

    REPLACE ECM Click here

    OK

    END (CAMSHAFT POSITION SENSOR IS DEFECTIVE)