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

DESCRIPTION

The push-button start function uses a push-type engine switch, which the driver can operate by merely carrying the key. This system consists primarily of the power management control ECU, engine switch, ID code box, steering lock ECU, key, ACC relay, IG1 relay, IG2 relay and certification ECU. The power management control ECU controls the system. This function operates in cooperation with the entry and start system.

WIRING DIAGRAM


CAUTION / NOTICE / HINT

Note


  • When using the GTS with the engine switch off to troubleshoot: Connect the GTS to the vehicle, and turn a courtesy light switch on and off at 1.5 second intervals until communication between the GTS and vehicle begins.

  • Before performing the inspection, check that there are no problems related to the CAN communication system and LIN communication system.

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

Tech Tips

After the certification ECU, steering lock actuator assembly (steering lock ECU), ID code box and/or ECM are/is replaced, perform the registration procedures described in the Service Bulletin.


  1. EMERGENCY ENGINE START CONTROL

    A004RLME12
    Text in Illustration
    *1 Engine Switch
    *2 Key

    1. To operate the push-button start function when the key battery is low, hold the key against to the engine switch with the clutch pedal depressed.

PROCEDURE


  1. CHECK IF ENGINE START (INITIALIZE STEERING LOCK)


    1. Place the key on the seat. Depress the clutch pedal.

    2. Check that the engine switch indicator is illuminated in green, push the engine switch, and check that the engine starts.

    3. Open and close the driver side door with the engine switch off.

    4. 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.


    OK

    USE SIMULATION METHOD TO CHECK Click here

    NG

  2. READ VALUE USING GTS AND CHECK FOR DTC


    1. Read value using the GTS (Power Supply Open).


      1. Connect the GTS to the DLC3.

      2. Turn the engine switch on (IG).

      3. Turn the GTS on.

      4. Enter the following menus: Body Electrical / Entry&Start / Data List.

      5. According to the display on the GTS, read the Data List.

        Entry&Start
        Tester Display Measurement Item/Range Normal Condition Diagnostic Note
        Power Supply Open Power supply open / OK or NG (Past)

        OK: Power supply normal

        NG (Past): Power supply open occurred in past

        		 -

    2. Check for DTCs


      1. Enter the following menus: All / DTC.

      2. Read the DTCs.

        Result
        Result Proceed to
        No DTC is output, power supply open has not occurred in past A
        DTCs other than B2782 are output B
        Power supply open has occurred in past and/or DTC B2782 is output C

    B

    GO TO DTC CHART Click here

    C

    GO TO STEERING LOCK SYSTEM (B2782) Click here

    A

  3. CHECK ENGINE SWITCH CONDITION


    1. Check if the power source mode changes.


      1. When the key is inside the vehicle, push the engine switch and check that the power source mode changes.

        Result
        Result Proceed to
        OK: off → on (ACC) → on (IG) → off A
        Power source mode does not change to on (IG) or on (ACC). B
        Power source mode does not change to on (IG). C
        Power source mode does not change to on (ACC). D

    B

    GO TO POWER SOURCE MODE DOES NOT CHANGE TO ON (IG AND ACC) Click here

    C

    GO TO POWER SOURCE MODE DOES NOT CHANGE TO ON (IG) Click here

    D

    GO TO POWER SOURCE MODE DOES NOT CHANGE TO ON (ACC) Click here

    A

  4. CHECK CRANKING FUNCTION


    1. Check the engine cranking function.


      1. When there is fuel in the fuel tank and the key is inside the vehicle, check that depressing the clutch pedal and pressing the engine switch cranks the engine.

        OK
        Engine cranks.

        Tech Tips

        If the result is OK, refer to the ECD system.



    OK

    GO TO ECD SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING)

    NG

  5. INSPECT CLUTCH START SWITCH


    1. A004SC8E30
      *a Component without harness connected: (Clutch Start Switch Assembly)
      *b 8.0 +/-0.35 mm (0.315 +/-0.014 in.)
      *c Pushed in
      *d Released

      Disconnect the A3 clutch start switch connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      1 - 2

      Pushed in

      (Clutch pedal depressed)

      		 Below 1 Ω

      Released

      (Clutch pedal released)

      		 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR, OR REPLACE ST RELAY OR CLUTCH START SWITCH Click here

    OK

  6. INSPECT STARTER RELAY (ST RELAY)


    1. A004P5SE02

      Remove the ST relay from the No. 1 relay block.

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

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

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR, OR REPLACE ST RELAY OR CLUTCH START SWITCH Click here

    OK

  7. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - BODY GROUND)


    1. A004RMRE02
      Text in Illustration
      *1

      Rear view of wire harness connector

      (to Power Management Control ECU)

      Disconnect the D113 ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      D113-3 (STAR) - Body ground 20°C (68°F) 93.8 to 136.4 Ω

    NG

    CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - STEERING LOCK ECU) Click here

    OK

  8. READ VALUE USING GTS (CLUTCH START SWITCH)


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / Power Source Control / Data List.

    5. According to the display on the GTS, read the Data List.

      Power Source Control
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Neutral SW/Clutch SW Status of the clutch start switch/ ON or OFF

      ON: Clutch pedal depressed

      OFF: Clutch pedal released

      		 -
      OK
      ON (clutch pedal depressed) or OFF (clutch pedal released) appears on the screen according to the condition of the clutch pedal.

    NG

    REPLACE POWER MANAGEMENT CONTROL ECU Click here

    OK

  9. READ VALUE USING GTS (STEERING UNLOCK SWITCH)


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / Power Source Control / Data List.

    5. According to the display on the GTS, read the Data List.

      Power Source Control
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Steering Unlock Switch Steering unlock switch / ON or OFF

      ON: Steering lock released

      OFF: Steering lock locked

      		 -
      OK
      ON (steering lock released) or OFF (steering lock locked) appears on the screen according to the steering lock condition.

    NG

    CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - STEERING LOCK ECU) Click here

    OK

  10. CHECK STEERING LOCK


    1. Turn the engine switch from off to on (ACC) and check that the steering lock moves to the released position when the engine switch is on (ACC).

      OK
      Lock moves to released position.

    NG

    GO TO STEERING LOCK SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) Click here

    OK

  11. READ VALUE USING GTS (ENGINE START REQUEST)


    1. Connect the GTS to the DLC3.

    2. Turn the GTS on.

      Tech Tips

      When using the GTS 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.

    3. Enter the following menus: Body Electrical / Entry&Start / Data List.

    4. According to the display on the GTS, read the Data List.

    5. Turn the engine switch on (IG).

      Entry&Start
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Engine Start Request Start request signal response / OK or NG

      OK: Received

      NG: Not received

      		 The engine switch is pressed and held.
      OK
      OK appears on the screen.

    NG

    REPLACE CERTIFICATION ECU

    OK

  12. READ VALUE USING GTS (L CODE)


    1. Connect the GTS to the DLC3.

    2. Turn the GTS on.

      Tech Tips

      When using the GTS 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.

    3. Enter the following menus: Body Electrical / Entry&Start / Data List.

    4. According to the display on the GTS, read the Data List.

    5. Turn the engine switch on (IG).

      Entry&Start
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      L Code Check L code certification result / OK or NG

      OK: L code certification result normal

      NG: L code certification result abnormal

      		 -
      OK
      OK (L code certification result normal) appears on the screen.

    NG

    GO TO ENGINE IMMOBILISER SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) Click here

    OK

  13. READ VALUE USING GTS (S CODE)


    1. Connect the GTS to the DLC3.

    2. Turn the GTS on.

      Tech Tips

      When using the GTS 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.

    3. Enter the following menus: Body Electrical / Entry&Start / Data List.

    4. According to the display on the GTS, read the Data List.

    5. Turn the engine switch on (IG).

      Entry&Start
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      S Code Check S code certification result / OK or NG

      OK: S code certification result normal

      NG: S code certification result abnormal

      		 -
      OK
      OK (S code certification result normal) appears on the screen.

    NG

    GO TO ENGINE IMMOBILISER SYSTEM

    OK

  14. READ VALUE USING GTS (STARTER REQUEST SIGNAL)


    1. Connect the GTS to the DLC3.

    2. Turn the GTS on.

      Tech Tips

      When using the GTS 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.

    3. Enter the following menus: Body Electrical / Power Source Control / Data List.

    4. According to the display on the GTS, read the Data List.

    5. Turn the engine switch on (IG).

      Power Source Control
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Starter Request Signal Starter request signal monitor / ON or OFF

      ON: ST relay on

      OFF: ST relay off

      		 The engine switch is pressed and held.

      Note

      Check that the engine switch indicator is illuminated in green and push the engine switch.

      OK
      The Data List item changes from OFF to ON when the engine switch is pushed.

      Tech Tips

      If the result is OK, refer to the ECD system.



    OK

    GO TO ECD SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING)

    NG

    REPLACE POWER MANAGEMENT CONTROL ECU Click here

  15. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - STEERING LOCK ECU)


    1. Disconnect the D111 power management control ECU connector.

      A004TKFE01
      Text in Illustration
      *1

      Rear view of wire harness connector

      (to Power Management Control ECU)

      		 *2

      Front view of wire harness connector

      (to Steering Lock ECU)

    2. Disconnect the D57 steering lock ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      D57-4 (SLP1) - D111-3 (SLP) Always Below 1 Ω
      D57-4 (SLP1) or D111-3 (SLP) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  16. INSPECT STEERING LOCK ACTUATOR ASSEMBLY (STEERING LOCK ECU)


    1. A004TZAE02
      Text in Illustration
      *1

      Component with harness connected

      (Steering Lock ECU)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      D57-4 (SLP1) - Body ground Steering lock locked 10 kΩ or higher
      D57-4 (SLP1) - Body ground Steering lock released Below 1 Ω

    OK

    REPLACE POWER MANAGEMENT CONTROL ECU Click here

    NG

    REPLACE STEERING LOCK ACTUATOR ASSEMBLY (STEERING LOCK ECU) Click here

  17. REPAIR OR REPLACE HARNESS OR CONNECTOR, OR REPLACE ST RELAY OR CLUTCH START SWITCH


    1. Replace the ST relay or clutch start switch with a new or normally functioning part, or repair or replace any damaged harness or connector.


    NEXT

  18. READ VALUE USING GTS (STARTER REQUEST SIGNAL)


    1. Connect the GTS to the DLC3.

    2. Turn the GTS on.

      Tech Tips

      When using the GTS 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.

    3. Enter the following menus: Body Electrical / Power Source Control / Data List.

    4. According to the display on the GTS, read the Data List.

    5. Turn the engine switch on (IG).

      Power Source Control
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Starter Request Signal Starter request signal monitor / ON or OFF

      ON: ST relay on

      OFF: ST relay off

      		 The engine switch is pressed and held.

      Note

      Check that the engine switch indicator is illuminated in green and push the engine switch.

      OK
      The Data List item changes from OFF to ON when the engine switch is pushed.

    NG

    REPLACE POWER MANAGEMENT CONTROL ECU Click here

    OK

  19. CHECK IF ENGINE STARTS


    1. Place the key on the seat. Depress the clutch pedal.

    2. Check that the engine switch indicator is illuminated in green, push the engine switch, and check that the engine starts.

    3. Open and close the driver side door with the engine switch off.

    4. 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.

      Tech Tips

      If the result is not OK, refer to the ECD system.



    OK

    END

    NG

    GO TO ECD SYSTEM (Starter Signal Circuit)