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 Techstream, 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 of the following condition is met (1 trip detection logic):

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

  • After the engine starts (engine speed is 500 rpm or higher), the engine speed drops to 200 rpm or less within approximately 2 seconds.

  • 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 with motor body 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

  • Engine immobiliser system

  • ECM
A011UJGE09

  1. Reference waveforms showing a normal cold engine start

    A011QU1

  2. Reference waveforms showing a normal warm engine start

    A011RBJ

  3. Reference values when there is an air leak in the intake system during starting difficulty

    Freeze Frame Data P1604 Startability Malfunction
    Parameter -3 -2 -1 0 1 Unit
    Engine Speed 1489 986 345 186 124 rpm
    Calculate Load 36.2 28.2 31.4 92.4 94.6 %
    Vehicle Load 7.9 7.9 9.2 7.2 6.0 %
    MAF 10.12 5.04 2.79 0.81 0.68 gm/sec
    Atmosphere Pressure 0 0 0 0 0 kPa
    Coolant Temp 185 185 185 185 185 F
    Intake Air 102 102 102 102 102 F
    Battery Voltage 13.222 13.300 12.109 11.972 11.854 V
    Throttle Sensor Volt % 16.5 16.5 16.0 15.6 15.6 %
    Throttl Sensor #2 Volt % 48.2 48.2 47.8 47.2 47.2 %
    Throttle Sensor Position 0.0 0.0 0.0 0.0 0.0 %
    Throttle Motor DUTY 16.5 16.5 16.0 15.6 15.6 %
    Injector (Port) 3628 2620 2744 2744 2744 μs
    Injection Volum (Cylinder 1) 3.062 0.226 0.226 0.226 0.226 ml
    Fuel Pump Duty 58.6 58.6 58.6 58.6 58.6 %
    EVAP (Purge) VSV 0.0 0.0 0.0 0.0 0.0 %
    Evap Purge Flow 0.0 0.0 0.0 0.0 0.0 %
    Purge Density Learn Value 0.000 0.000 0.000 0.000 0.000
    EVAP System Vent Valve OFF OFF OFF OFF OFF
    EVAP Purge VSV OFF OFF OFF OFF OFF
    Purge Cut VSV Duty 0.0 0.0 0.0 0.0 0.0 %
    Target Air-Fuel Ratio 0.998 0.998 0.998 0.998 0.998
    AF Lambda B1S1 0.999 0.999 0.999 0.999 0.999
    AF Lambda B2S1 0.997 0.997 0.997 0.998 0.998
    AFS Voltage B1S1 3.258 3.258 3.258 3.258 3.258 V
    AFS Voltage B2S1 3.251 3.251 3.251 3.253 3.253 V
    O2S B1S2 0.000 0.000 0.000 0.000 0.000 V
    O2S B2S2 0.015 0.015 0.015 0.000 0.000 V
    Short FT #1 0.000 0.000 0.000 0.000 0.000 %
    Long FT #1 8.782 4.354 -2.665 -2.665 -2.665 %
    Total FT #1 0.058 0.058 0.058 0.058 0.058
    Sort FT #2 0.000 0.000 0.000 0.000 0.000 %
    Long FT #2 9.264 4.587 -2.462 -2.462 -2.462 %
    Total FT #2 0.062 0.062 0.062 0.062 0.062
    Fuel System Status #1 OL OL OL OL OL
    Fuel System Status #2 OL OL OL OL OL
    IGN Advance 0.0 10.5 16.5 18.0 18.0 deg
    Knock Feedback Value -1.5 -1.5 -1.5 -1.5 -1.5 deg(CA)
    Knock Correct Learn Value 17.0 17.0 17.0 17.0 17.0 deg(CA)
    Starter Signal Close Close Close Close Close

WIRING DIAGRAM

Refer to DTC P0351 for the ignition coil circuit Click here.

Refer to DTC P0451 for the EVAP system circuit Click here.

Refer to DTC P2195 for the air fuel ratio sensor circuit Click here.

Refer to Fuel Pump Control Circuit Click here.

Refer to Fuel Injector Circuit Click here.

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 the 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 Techstream. 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 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 an ECM may be malfunctioning.

          A011QUME50

      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.

          A011UKVE28

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

        Tech Tips

        If the engine speed is 250 rpm or higher (combustion occurs but the initial combustion and starter turn off 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.

          A011QUME21

    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. The initial combustion and starter turn off occur late.

          Tech Tips

          If the 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

      • Engine immobiliser system

      • 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 31
        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

        		 32 to 34
        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

        		 35 to 48
        Ignition system malfunction

        • Spark plug

        • Crankshaft position sensor

        • Ignition coil assembly
        Engine stalls after starter turn off Air suction

        • Intake system connections

        		 49 to 54
        Deposits in throttle with motor body assembly

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

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

        • Mass air flow meter sub-assembly
        The initial combustion and starter turn off occur late Engine coolant temperature sensor malfunction

        • Engine coolant temperature sensor

        		 55 to 68
        Mass air flow meter sub-assembly malfunction

        • Mass air flow meter sub-assembly
        Abnormal air fuel ratio 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 surge tank

        • 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

        		 70 to 74
        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 Crankshaft position sensor and/or VVT 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 inspection procedure.

    • After turning engine 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)

    1. Connect the Techstream to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the Techstream on.

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

    5. 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 then the DTC is stored.

      A011T8AE46
      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

    1. Connect the Techstream to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the Techstream on.

    4. Enter the following menus: Powertrain / Engine / Data List / Primary / Immobiliser Fuel Cut.

    5. Read the value displayed on the Techstream.

      OK
      Immobiliser Fuel Cut is OFF.

      Tech Tips

      If the engine is cranked immediately after reconnecting the battery cable (key verification for engine immobiliser system not completed), the engine cannot be started. Key verification needs to wait for several seconds after turning the engine switch on (IG).

    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 Techstream to the DLC3.

    2. Turn the engine switch on (IG).

    3. Using the Techstream, 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
      Freeze Frame Data Item Suspected Area Proceed to
      Low Rev for Eng Start
      ON exists

      • Intake system connections

      • Throttle with motor body 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)

    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 SUB-ASSEMBLY Click here

    A

    CHARGE OR REPLACE BATTERY

  5. READ FREEZE FRAME DATA

    1. Connect the Techstream to the DLC3.

    2. Turn the engine switch on (IG).

    3. Using the Techstream, 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

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

        A011RD0E01

      • *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 replacing the engine assembly Click here.

    B

    CHECK SENSOR INSTALLATION (CRANKSHAFT POSITION SENSOR) Click here

    C

    CHECK AND REPAIR ENGINE ASSEMBLY 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

    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.
    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. REPLACE 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 Techstream to the DLC3.

    2. Turn the engine switch on (IG).

    3. Using the Techstream, 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 lower than outside 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 C
      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 outside 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.

    B

    PERFORM ACTIVE TEST USING TECHSTREAM (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 TECHSTREAM (CONTROL THE FUEL PUMP / SPEED)

    1. Connect the Techstream to the DLC3.

      A011TYFE20

    2. Disconnect the fuel pump connector.

    3. Turn the engine switch on (IG).

    4. Turn the Techstream on.

    5. Enter the following menus: Powertrain / Engine / Active Test / 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
      N11-4 (B) - Body ground Active Test is being performed 11 to 14 V
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Fuel Pump)

      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 ASSEMBLY)

    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.

    NG

    CHECK FUEL INJECTOR CIRCUIT Click here

    OK

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

    1. Connect the Techstream to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the Techstream on.

    4. Enter the following menus: Powertrain / Engine / Active Test / 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.

    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

      Tech Tips

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

    B

    PERFORM SIMULATION TEST Click here

    A

    REPAIR OR REPLACE FUEL SYSTEM

  15. READ FREEZE FRAME DATA

    1. Connect the Techstream to the DLC3.

    2. Turn the engine switch on (IG).

    3. Using the Techstream, 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 more, or lower than outside 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 outside 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.

    B

    INSPECT FUEL INJECTOR ASSEMBLY Click here

    C

    CHECK AND REPAIR ENGINE ASSEMBLY

    D

    READ FREEZE FRAME DATA Click here

    A

    REPLACE ENGINE COOLANT TEMPERATURE SENSOR Click here

  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.

    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 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, fuel filter or fuel tank, remove the foreign matter.

    B

    PERFORM SIMULATION TEST Click here

    A

    REPAIR OR REPLACE FUEL SYSTEM

  18. READ FREEZE FRAME DATA

    1. Connect the Techstream to the DLC3.

    2. Turn the engine switch on (IG).

    3. Using the Techstream, 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 assembly 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 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 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 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.

    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
    B

    PERFORM SIMULATION TEST Click here

    A

    REPLACE FUEL PRESSURE REGULATOR Click here

  20. INSPECT FUEL INJECTOR ASSEMBLY

    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 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

    INSPECT THROTTLE WITH MOTOR BODY ASSEMBLY 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.

    NG

    REPLACE FUEL INJECTOR ASSEMBLY Click here

    OK

  22. INSPECT THROTTLE WITH MOTOR BODY 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 with motor body assembly Click here.

    B

    CLEAN OR REPLACE THROTTLE WITH MOTOR BODY ASSEMBLY Click here

    A

  23. CHECK INTAKE SYSTEM

    1. Check the intake system for vacuum leaks Click here.

      OK
      No leaks in intake system.

      Tech Tips

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

    NG

    REPAIR OR REPLACE INTAKE SYSTEM

    OK

  24. PERFORM SIMULATION TEST

    1. Check if the engine can be started.

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

    END

    A

  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 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 turn off (engine stalls immediately after the first time the engine speed increases)*2

      • Intake system connections

      • Throttle with motor body assembly

      • Camshaft timing oil control valve assembly

      • Mass air flow meter sub-assembly system

      		 D
      The 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

      • 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 the 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

    INSPECT MASS AIR FLOW METER SUB-ASSEMBLY 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.*1

      • 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

      *1: 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.

    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 replacing the engine assembly Click here.

    NG

    REPAIR OR REPLACE ENGINE ASSEMBLY

    OK

    INSPECT STARTER ASSEMBLY Click here

  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.
    NG

    REPLACE STARTER ASSEMBLY Click here

    OK

    REPLACE DRIVE PLATE AND RING GEAR SUB-ASSEMBLY Click here

  30. INSPECT BATTERY

    1. Inspect the battery Click here.

    NG

    CHARGE OR REPLACE BATTERY

    OK

  31. INSPECT STARTER ASSEMBLY

    1. Inspect the starter assembly Click here.

    NG

    REPLACE STARTER ASSEMBLY 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 assembly

      • Excess engine friction

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

      Tech Tips

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

      • Perform "Inspection After Repair" after replacing the engine assembly Click here.

    B

    CHECK AND REPAIR ENGINE ASSEMBLY

    A

  33. INSPECT BATTERY

    1. Inspect the battery Click here.

    NG

    CHARGE OR REPLACE BATTERY

    OK

  34. 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 replacing the engine assembly Click here.

    NG

    CHECK AND REPAIR ENGINE ASSEMBLY

    OK

    INSPECT STARTER ASSEMBLY Click here

  35. 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.
    NG

    READ VALUE USING TECHSTREAM (ENGINE SPEED) Click here

    OK

  36. CHECK FUEL PRESSURE

    1. Check the fuel pressure Click here.

    NG

    PERFORM ACTIVE TEST USING TECHSTREAM (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 assembly 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 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 to maintain fuel pressure after stopping the engine.

      *4: From step 69, perform fuel system troubleshooting C (steps 70 to 74).

    B

    INSPECT FUEL INJECTOR ASSEMBLY 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.

      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*1

      Tech Tips

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

      • *1: from step 69, perform fuel system troubleshooting C (steps 70 to 74).

    B

    CHECK MALFUNCTION CONDITION Click here

    A

    REPLACE FUEL PRESSURE REGULATOR Click here

  40. INSPECT FUEL INJECTOR ASSEMBLY

    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 higher A
      Less than 4000 ppm B*1

      Tech Tips

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

      • *1: From step 69, perform fuel system troubleshooting C (steps 70 to 74).

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

    B

    CHECK MALFUNCTION CONDITION Click here

    A

    REPLACE FUEL INJECTOR ASSEMBLY 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.

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

    NG

    REPLACE SPARK PLUG Click here

    OK

  42. READ VALUE USING TECHSTREAM (ENGINE SPEED)

    1. Connect the Techstream to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the Techstream on.

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

    NG

    CHECK CRANKSHAFT POSITION SENSOR CIRCUIT Click here

    OK

  43. 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.

    NG

    CHECK IGNITION COIL POWER SOURCE CIRCUIT Click here

    OK

  44. 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 69 and perform troubleshooting for the ignition system (steps 75 to 83).

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

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE IGNITION COIL ASSEMBLY Click here

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

    1. Connect the Techstream to the DLC3.

    2. Turn the engine switch on (IG).

    3. Enter the following menus: Powertrain / Engine / 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 TECHSTREAM (CONTROL THE FUEL PUMP / SPEED)

    1. Connect the Techstream to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the Techstream on.

    4. Enter the following menus: Powertrain / Engine / Active Test / 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 69 and perform fuel system troubleshooting C (steps 70 to 74).

    B

    CHECK FUEL PUMP CONTROL CIRCUIT Click here

    A

    REPAIR OR REPLACE FUEL LINE

  47. READ VALUE USING TECHSTREAM (ENGINE SPEED)

    1. Connect the Techstream to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the Techstream on.

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

    NG

    REPLACE CRANKSHAFT POSITION SENSOR Click here

    OK

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

    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.

    NG

    CHECK FUEL INJECTOR CIRCUIT Click here

    OK

    REPLACE ECM Click here

  49. INSPECT MASS AIR FLOW METER SUB-ASSEMBLY

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

    NG

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

    OK

  50. 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 air surge tank assembly increases and the air suction noise becomes louder.

      • If Short FT #1, Short FT #2, Long FT #1 and Long FT #2 are largely different from the normal values (differ by higher 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 is no air leaks.

      Tech Tips

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

    NG

    REPAIR OR REPLACE INTAKE SYSTEM

    OK

  51. INSPECT THROTTLE WITH MOTOR BODY ASSEMBLY

    1. Disconnect the throttle with motor body 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 Click here.

    B

    PERFORM ACTIVE TEST USING TECHSTREAM (OPERATE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY) Click here

    A

  52. INSPECT THROTTLE WITH MOTOR BODY ASSEMBLY

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

      OK
      No carbon present.

      Tech Tips

      Perform "Inspection After Repair" after cleaning the throttle with motor body assembly Click here.

    NG

    REMOVE FOREIGN OBJECT AND CLEAN THROTTLE WITH MOTOR BODY ASSEMBLY

    OK

  53. PERFORM ACTIVE TEST USING TECHSTREAM (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*1

        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 assembly is stuck at the advanced side, the valve overlap increases and combustion worsens due to the internal EGR which may cause rough idle or cause the engine to stall.

        • *1: From step 69, perform intake system troubleshooting (steps 84 to 86). If engine starting trouble still occurs, perform fuel system troubleshooting A (steps 87 to 94).

    B

    CHECK MALFUNCTION CONDITION Click here

    A

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

  54. 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 69 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.

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE MASS AIR FLOW METER SUB-ASSEMBLY 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 69 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.

    NG

    REPLACE ENGINE COOLANT TEMPERATURE SENSOR Click here

    OK

  56. 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 69 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.

    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 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 69 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.

    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 69 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.

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  59. READ VALUE USING TECHSTREAM

    1. Connect the Techstream to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the Techstream on.

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

      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 Techstream to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the Techstream on.

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

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

      • - Engine switch on (IG)

      • - Engine stopped

      • - Battery voltage 9 V or higher

    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

    CHECK FUEL PRESSURE Click here

    A

  61. INSPECT AIR FUEL RATIO SENSOR

    A011T2RE21

    1. Connect the Techstream to the DLC3.

    2. Start the engine.

    3. Turn the Techstream on.

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

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

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

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

    8. Enter the following menus: Powertrain / Engine / Active Test / Control the Injection Volume / Gas AF Control / AFS Voltage B1S1 or AFS Voltage B2S1.

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

      Standard
      Techstream Display Injection Volume Specified Condition

      AFS Voltage B1S1

      AFS Voltage B2S1

      		 +12% Air fuel ratio sensor output voltage is below 3.1 V
      -12% 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 69 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.

    NG

    REPLACE AIR FUEL RATIO SENSOR Click here

    OK

  62. PERFORM SIMULATION TEST

    1. Check if the idle 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 69 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.

    NG

    REPLACE FUEL INJECTOR ASSEMBLY Click here

    OK

    REPLACE MASS AIR FLOW METER SUB-ASSEMBLY Click here

  63. CHECK FUEL PRESSURE

    1. Check the fuel pressure Click here.

    NG

    PERFORM ACTIVE TEST USING TECHSTREAM (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 69 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 69 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 is stuck open A
      When the engine is stopped and approximately 15 to 120 minutes have passed, engine starting trouble occurs*2 Fuel injector assembly 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 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 to maintain fuel pressure after stopping the engine.

      *4: From step 69, 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*1

      Tech Tips

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

      • *1: From step 69, 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

    CHECK MALFUNCTION CONDITION Click here

    A

    REPLACE FUEL PRESSURE REGULATOR Click here

  67. INSPECT FUEL INJECTOR ASSEMBLY

    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 higher A
      Less than 4000 ppm B*1

      Tech Tips

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

      • *1: From step 69, 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.

    B

    CHECK MALFUNCTION CONDITION Click here

    A

    REPLACE FUEL INJECTOR ASSEMBLY Click here

  68. PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE FUEL PUMP / SPEED)

    1. Connect the Techstream to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the Techstream on.

    4. Enter the following menus: Powertrain / Engine / Active Test / 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 69 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.

    B

    CHECK FUEL PUMP CONTROL CIRCUIT Click here

    A

    REPAIR OR REPLACE FUEL LINE

  69. CHECK MALFUNCTION CONDITION

    1. If the malfunction could not be identified during the inspection in steps 38, 39, 40 and 46, perform fuel system troubleshooting C (steps 70 to 74).

      Result
      Performed Step Troubleshooting by System Procedure Proceed to
      Steps 38, 39, 40 and 46 Fuel system troubleshooting C 70 to 74 A

    2. If the malfunction could not be identified during the inspection in step 44, perform ignition system troubleshooting (steps 75 to 83).

      Result
      Performed Step Troubleshooting by System Procedure Proceed to
      Step 44 Ignition system troubleshooting 75 to 83 B

    3. If the malfunction could not be identified during the inspection in steps 53 and 54, 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 53 and 54 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 68, 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 68 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 TECHSTREAM (ISC LEARNING VALUE) Click here

    D

    CHECK FUEL PRESSURE Click here

    A

  70. 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.

    NG

    REPLACE FUEL INJECTOR ASSEMBLY Click here

    OK

  71. CHECK TERMINAL VOLTAGE (POWER SOURCE OF FUEL INJECTOR ASSEMBLY)

    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.

    NG

    CHECK FUEL INJECTOR CIRCUIT Click here

    OK

  72. REPLACE 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 VVT SENSOR (FOR INTAKE CAMSHAFT) Click here

    OK

    END (CRANKSHAFT POSITION SENSOR IS DEFECTIVE)

  73. 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.
    NG

    REPLACE VVT SENSOR (FOR EXHAUST CAMSHAFT) Click here

    OK

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

  74. 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.
    NG

    REPLACE ECM Click here

    OK

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

  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.
    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.
    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.
    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.

    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.

    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.

    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.
    NG

    REPLACE VVT SENSOR (FOR INTAKE CAMSHAFT) Click here

    OK

    END (CRANKSHAFT POSITION SENSOR IS DEFECTIVE)

  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.
    NG

    REPLACE VVT SENSOR (FOR EXHAUST CAMSHAFT) Click here

    OK

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

  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.
    NG

    REPLACE ECM Click here

    OK

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

  84. READ VALUE USING TECHSTREAM (ISC LEARNING VALUE)

    1. Connect the Techstream to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the Techstream on.

    4. Enter the following menus: Powertrain / Engine / Data List / Primary / ISC Learning Valve.

    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.

    NG

    CHECK AND REPAIR ENGINE ASSEMBLY

    OK

    CHECK VALVE TIMING Click here

  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.

    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

      380 (3.9 kgf/cm2, 55 psi) to 420 kPa (4.3 kgf/cm2, 61 psi)
      5 minutes after stopping engine

      147 kPa (1.5 kgf/cm2, 21 psi) or higher
    NG

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

    OK

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

    1. Connect the Techstream to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the Techstream on.

    4. Enter the following menus: Powertrain / Engine / Data List / Gas AF Control / Long FT #1 and 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 idle 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.
    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.

    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.
    NG

    REPLACE ECM Click here

    OK

    END (CRANKSHAFT POSITION SENSOR IS DEFECTIVE)

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

    1. Connect the Techstream to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the Techstream on.

    4. Enter the following menus: Powertrain / Engine / Active Test / 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.

    B

    INSPECT FUEL PUMP Click here

    A

    REPAIR OR REPLACE FUEL LINE

  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.

    NG

    REPLACE FUEL PUMP Click here

    OK

    REPLACE FUEL PRESSURE REGULATOR 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.

    NG

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

    OK

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

    1. Connect the Techstream to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the Techstream on.

    4. Enter the following menus: Powertrain / Engine / Data List / Gas AF Control / Long FT #1 and 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 idle 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

  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.
    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.

    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.
    NG

    REPLACE ECM Click here

    OK

    END (CRANKSHAFT POSITION SENSOR IS DEFECTIVE)

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

    1. Connect the Techstream to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the Techstream on.

    4. Enter the following menus: Powertrain / Engine / Active Test / 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.

    B

    INSPECT FUEL PUMP Click here

    A

    REPAIR OR REPLACE FUEL LINE

  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.

    NG

    REPLACE FUEL PUMP Click here

    OK

  103. CHECK PURGE VSV

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

      A011SQSE01
      Text in Illustration
      *1 Fuel Vapor Feed Hose Assembly (to Canister)
      *2 Purge VSV Connector
      *3 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 DTCs Click here.

    NG

    INSPECT PURGE VSV Click here

    OK

  104. INSPECT FUEL INJECTOR ASSEMBLY

    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 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.

    B

    CHECK INTAKE VALVE Click here

    A

    REPLACE FUEL INJECTOR ASSEMBLY Click here

  105. 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 TECHSTREAM (ISC LEARNING VALUE) Click here

    A

    CLEAN INTAKE VALVE

  106. READ VALUE USING TECHSTREAM (ISC LEARNING VALUE)

    1. Connect the Techstream to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the Techstream on.

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

    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.

    NG

    CHECK AND REPAIR ENGINE ASSEMBLY

    OK

    CHECK VALVE TIMING Click here

  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.

    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.
    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.
    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.
    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.

    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.

    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.

    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.
    NG

    REPLACE VVT SENSOR (FOR INTAKE CAMSHAFT) Click here

    OK

    END (CRANKSHAFT POSITION SENSOR IS DEFECTIVE)

  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.
    NG

    REPLACE VVT SENSOR (FOR EXHAUST CAMSHAFT) Click here

    OK

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

  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.
    NG

    REPLACE ECM Click here

    OK

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