ENTRY AND START SYSTEM (for Start Function) Engine does not Start

DESCRIPTION


  1. ENGINE START SYSTEM FUNCTION


    1. If the engine switch is pressed with the shift lever is in the P or N position and the brake pedal depressed, the power source control ECU determines that it is an engine start request.

    2. The certification ECU (smart key ECU assembly) and other ECUs perform key verification via the LIN communication line.

    3. The power source control ECU activates the ACC relay.

    4. The power source control ECU activates the IG1 and IG2 relays.

    5. The certification ECU (smart key ECU assembly) outputs a steering UNLOCK signal. The signal is sent to the power source control ECU via the steering lock ECU.

    6. The power source control ECU sends an engine start request signal to the ECM.

    7. The ECM sends an ACC cut request signal to the power source control ECU.

    8. The ECM and power source control ECU activate the starter relay.

    9. The power source control ECU deactivates the ACC relay until the power source control ECU detects an engine start.

    A0161I4E03

WIRING DIAGRAM

See Cranking Holding Function Circuit Click here.

INSPECTION PROCEDURE


  1. EMERGENCY ENGINE START CONTROL


    1. If there is a malfunction in the stop light switch or STOP fuse, their signals may not be correctly transmitted to the power source control ECU. This may result in the engine not starting even if the engine switch is pressed while the brake pedal is depressed and the shift lever is in the P position.

      To activate the starter:


      1. Turn the engine switch from off to on (ACC).

      2. Hold pressing and hold the engine switch for 15 seconds.

    Tech Tips

    After the certification ECU (smart key ECU assembly), steering lock ECU, ID code box (immobiliser code ECU) and/or ECM are/is replaced, perform the registration procedures for the engine immobiliser system.

PROCEDURE


  1. CHECK IF ENGINE START (INITIALIZE STEERING LOCK)


    1. Shift lever is in the P.

    2. Open and close the driver's door with the engine switch off.

    3. Check if the engine can be started.

      OK
      Engine can be started.

      Tech Tips

      After the battery is discharged and then recharged, the engine may not start unless the steering lock is initialized using the above procedure.


    NG

    CHECK THE ENGINE SWITCH CONDITION Click here

    OK

    END (INITIALIZATION WAS DEFECTIVE)

  2. CHECK THE ENGINE SWITCH CONDITION


    1. Check the power source mode changes.


      1. When the key is inside the vehicle and the shift lever is in the P position, check that the power source mode changes.

        OK
        off → on (ACC) → on (IG) → off

    NG

    GO TO OTHER FLOW CHART (POWER SOURCE MODE DOES NOT CHANGE) Click here

    OK

  3. CHECK DTC


    1. Clear the DTCs Click here.

    2. Check for DTCs again.

    3. Proceed to the next step based on the inspection result.

      Result
      Result Proceed to
      No DTC is output A
      Entry and start system (for start function) DTCs are output B
      Steering lock system DTCs are output C
      Engine immobiliser system DTCs are output D
      Vehicle stability control system DTCs are output E

    B

    GO TO DIAGNOSTIC TROUBLE CODE CHART (ENTRY AND START SYSTEM) Click here

    C

    GO TO DIAGNOSTIC TROUBLE CODE CHART (STEERING LOCK SYSTEM) Click here

    D

    GO TO DIAGNOSTIC TROUBLE CODE CHART (ENGINE IMMOBILISER SYSTEM) Click here

    E

    GO TO DIAGNOSTIC TROUBLE CODE CHART (VEHICLE STABILITY CONTROL SYSTEM) Click here

    A

  4. CHECK CRANKING FUNCTION


    1. Check the engine cranking function.


      1. When there is fuel in the fuel tank, the key is inside the vehicle, and the shift lever is in the P position, check that depressing the brake pedal and pressing the engine switch crank the engine.

        OK
        Engine cranks.

    NG

    CHECK STEERING LOCK Click here

    OK

  5. READ VALUE USING INTELLIGENT TESTER (ENGINE START REQUEST)


    1. Connect the intelligent tester to the DLC3.

      Tech Tips

      When using the intelligent tester with the engine switch off, turn on and off any of the door courtesy light switches repeatedly at 1.5 second intervals or less until communication between the tester and vehicle starts.

    2. Turn the engine switch on (IG).

      Smart key:
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Engine Start Request Start request signal response / OK or NG

      OK: Received

      NG: Not received

      		 -
      OK
      "OK" (received) and "NG" (not received) appear on the screen.

    NG

    REGISTER RECOGNITION CODE (ECU CODE) Click here

    OK

  6. REPLACE ID CODE BOX (IMMOBILISER CODE ECU)


    1. Replace ID code box (immobiliser code ECU).


    NEXT

  7. KEY REGISTRATION


    1. Register the key.


    NEXT

  8. CHECK IF THE ENGINE START


    1. Shift lever is in the P.

    2. Open and close the driver's door with the engine switch off.

    3. Check if the engine can be started.

      OK
      Engine can be started.

      Tech Tips

      After the battery is discharged and then recharged, the engine may not start unless the steering lock is initialized using the above procedure.


    NG

    GO TO SFI SYSTEM Click here

    OK

    END (ID CODE BOX (IMMOBILISER CODE ECU DEFECTIVE)

  9. CHECK STEERING LOCK


    1. Check if the steering lock is released when turning the engine switch on (ACC).

      OK
      The steering lock is released.

    NG

    GO TO STEERING LOCK SYSTEM Click here

    OK

  10. READ VALUE USING INTELLIGENT TESTER (S CODE)


    1. Connect the intelligent tester to the DLC3.

      Tech Tips

      When using the the intelligent tester with the engine switch off, turn on and off any of the door courtesy light switches repeatedly at 1.5 second intervals or less until communication between the tester and vehicle starts.

    2. Turn the engine switch on (IG).

      Smart key:
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      S Code Check S code check / OK or NG

      OK: Normal

      NG: Malfunction

      		 -
      OK
      "OK" is displayed on the screen.

    NG

    REGISTER RECOGNITION CODE (ECU CODE) Click here

    OK

  11. READ VALUE USING INTELLIGENT TESTER (L CODE)


    1. Connect the intelligent tester to the DLC3.

      Tech Tips

      When using the intelligent tester with the engine switch off, turn on and off any of the door courtesy light switches repeatedly at 1.5 second intervals or less until communication between the tester and vehicle starts.

    2. Turn the engine switch on (IG).

      Smart key:
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      L Code Check L code check / OK or NG

      OK: Normal

      NG: Malfunction

      		 -
      OK
      "OK" is displayed on the screen.

    NG

    KEY REGISTRATION Click here

    OK

  12. READ VALUE USING INTELLIGENT TESTER (STOP LIGHT SWITCH)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the engine switch on (IG).

    3. Check the result when the engine switch is turned on (IG) and the engine is started.

      Smart key:
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Stop Light Switch1 Stop light switch 1 / ON or OFF

      OK: Brake pedal depressed

      NG: Brake pedal released

      		 -
      OK
      OK (brake pedal depressed) and OFF (brake pedal released) appear on the screen.

    NG

    INSPECT FUSE Click here

    OK

  13. READ VALUE USING INTELLIGENT TESTER (PARK/NEUTRAL POSITION SWITCH)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the engine switch on (IG).

    3. Read the Data List according to the displays on the tester screen.

      Power Source Control:
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Neutral SW Park/Neutral position switch / ON or OFF

      ON: Shift position is P or N

      OFF: Shift position is not P nor N

      		 -
      OK
      "ON" (Shift position is P or N) and "OFF" (Shift position is not P nor N) appear on the screen.

    NG

    INSPECT STARTER RELAY Click here

    OK

  14. CHECK HARNESS AND CONNECTOR (POWER SOURCE CONTROL ECU - ECM)


    1. A015ZO9E23

      Disconnect the J55 connector from power source control ECU.

    2. Disconnect the A5 connector from ECM.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      J55-39 (STSW) - A5-27 (STSW) Always Below 1Ω
      J55-39 (STSW) or A5-27 (STSW) Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CONTROL ECU - ECM)

    OK

  15. CHECK POWER SOURCE CONTROL ECU


    1. A015ZW5E01

      Reconnect the J55 connector to the power source control ECU.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      J55-39 (STSW) - Body ground Brake pedal depressed, engine switch hold on (ST) Output voltage at terminals AM1 or AM2 is -2 V or more.

    NG

    REPLACE POWER SOURCE CONTROL ECU

    OK

    GO TO SFI SYSTEM

  16. KEY REGISTRATION


    1. Register the key.


    NEXT

  17. CHECK IF ENGINE START


    1. Shift lever is in the P position.

    2. Open and close the driver's door with the engine switch off.

    3. Check if the engine can be started.

      OK
      Engine can be started.

      Tech Tips

      After the battery is discharged and then recharged, the engine may not start unless the steering lock is initialized using the above procedure.


    NG

    REPLACE STEERING LOCK ACTUATOR Click here

    OK

    END

  18. REPLACE STEERING LOCK ACTUATOR


    1. Replace the steering lock ECU Click here.


    NEXT

  19. REGISTER RECOGNITION CODE (ECU CODE)


    1. Register the recognition code (ECU code).


    NEXT

  20. CHECK IF ENGINE START


    1. Shift lever is in the P position.

    2. Open and close the driver's door with the engine switch off.

    3. Check if the engine can be started.

      OK
      Engine can be started.

      Tech Tips

      After the battery is discharged and then recharged, the engine may not start unless the steering lock is initialized using the above procedure.


    NG

    REPLACE ID CODE BOX (IMMOBILISER CODE ECU)

    OK

    END (STEERING LOCK ECU DEFECTIVE)

  21. REGISTER RECOGNITION CODE (ECU CODE)


    1. Register the recognition code (ECU code).


    NEXT

  22. CHECK IF ENGINE START


    1. Shift lever is in the P position.

    2. Open and close the driver's door with the engine switch off.

    3. Check if the engine can be started.

      OK
      Engine can be started.

      Tech Tips

      After the battery is discharged and then recharged, the engine may not start unless the steering lock is initialized using the above procedure.


    NG

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) Click here

    OK

    END

  23. REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)


    1. Replace the certification ECU (smart key ECU assembly).


    NEXT

  24. REGISTER RECOGNITION CODE (ECU CODE)


    1. Register the recognition code (ECU code).


    NEXT

  25. CHECK IF ENGINE START


    1. Shift lever is in the P position.

    2. Open and close the driver's door with the engine switch off.

    3. Check if the engine can be started.

      OK
      Engine can be started.

      Tech Tips

      After the battery is discharged and then recharged, the engine may not start unless the steering lock is initialized using the above procedure.


    NG

    REPLACE ID CODE BOX (IMMOBILISER CODE ECU)

    OK

    END (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) DEFECTIVE)

  26. INSPECT FUSE


    1. Remove the STOP SW fuse from main body ECU RH (cowl side junction block RH).

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

      Standard Resistance
      Tester Connection Condition Specified condition
      STOP SW fuse Always Below 1Ω

    NG

    REPLACE STOP SW FUSE

    OK

  27. INSPECT STOP LIGHT SWITCH


    1. A0163A4E02

      Remove the stop light switch Click here.

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


    NG

    REPLACE STOP LIGHT SWITCH Click here

    OK

  28. CHECK HARNESS AND CONNECTOR (POWER SOURCE CONTROL ECU - STOP LIGHT SWITCH)


    1. Disconnect the J55 connector from the power source control ECU.

      A0162LJE01

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      J55-1 (STP) - A22-1 Always Below 1Ω
      J55-1 (STP) or A22-1 - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CONTROL ECU - STOP LIGHT SWITCH)

    OK

    REPLACE POWER SOURCE CONTROL ECU

  29. INSPECT STARTER RELAY


    1. A0161LXE23

      Remove the starter relay from engine room relay block No. 1.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      3 - 5 When battery voltage is not applied to terminal 1 and 2 10 kΩ or higher
      3 - 5 When battery voltage is applied to terminal 1 and 2 Below 1Ω

    NG

    REPLACE STARTER RELAY

    OK

  30. INSPECT PARK/NEUTRAL POSITION SWITCH


    1. A0160LJE06

      Disconnect the E45 connector from park/neutral position switch.

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

      Standard Resistance
      Tester Connection Shift Position Specified Condition
      4 - 5 P Below 1Ω
      4 - 5 N Below 1Ω
      4 - 5 Except N or P 10 kΩ or higher

    NG

    REPLACE PARK/NEUTRAL POSITION SWITCH

    OK

  31. CHECK HARNESS AND CONNECTOR (POWER SOURCE CONTROL ECU - PARK/NEUTRAL SWITCH)


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

      A015ZYHE01
      Standard Resistance
      Tester Connection Condition Specified Condition
      J55-17 (STR1) - E45-4 (B) Always Below 1Ω
      J55-17 (STR1) or E45-4 (B) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CONTROL ECU - PARK/NEUTRAL POSITION SWITCH)

    OK

  32. CHECK HARNESS AND CONNECTOR (PARK/NEUTRAL POSITION SWITCH - STARTER RELAY)


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

      A015Z4DE01
      Standard Resistance
      Tester Connection Condition Specified Condition
      E45-5 (L) - Engine room relay block No. 1 STARTER relay terminal 1 Always Below 1Ω
      E45-5 (L) or Engine room relay block No. 1 STARTER relay terminal 1 - Body ground Always 10 kΩ or higher
      Engine room relay block No. 1 STARTER relay terminal 2 - Body ground Always Below 1Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE POWER SOURCE CONTROL ECU