ECD SYSTEM(w/ DPF) Starter Signal Circuit

DESCRIPTION


WIRING DIAGRAM

A01VJPBE04

CAUTION / NOTICE / HINT

Note


  • When replacing the ECM, the ECM needs Registration and Initialization Click here.

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

Tech Tips

When the ECM must be replaced, before replacing the ECM, perform the "Learning Values Save" function using the GTS. Then after installing the new ECM, perform all of the initialization/registrations for the "Learning Values Write" function by following the instructions shown on the GTS display.

PROCEDURE


  1. CHECK WHETHER ENGINE CAN BE CRANKED


    1. Check if the engine can be cranked.

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

    B

    READ VALUE USING GTS (STARTER SIGNAL) Click here

    A

  2. READ VALUE USING GTS (STARTER SIGNAL)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menu items: Powertrain / Engine and ECT / Data List / Starter Signal.

    5. Check the value displayed on the GTS when the ignition switch is turned to the ON and START positions.

      OK
      Ignition Switch Position Starter Signal
      ON OFF
      START ON

    NG

    READ VALUE USING GTS (STARTER SIGNAL) Click here

    OK

  3. CHECK ST RELAY (POWER SOURCE)


    1. A01VLZ6E01
      Text in Illustration
      *1 Engine room relay Block
      *2 ST Relay Holder

      Remove the ST relay from the engine room relay block.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      5 (ST relay holder) - Body ground Always 11 to 14 V
      Result
      Result Proceed to
      OK (w/o Stop and Start System) A
      OK (w/ Stop and Start System) B
      NG C

    B

    CHECK HARNESS AND CONNECTOR (ECM - ST RELAY - BODY GROUND) Click here

    C

    REPAIR OR REPLACE HARNESS OR CONNECTOR (ST RELAY - BATTERY)

    A

  4. CHECK HARNESS AND CONNECTOR (ECM - ST RELAY - BODY GROUND)


    1. Disconnect the A108 ECM connector.

    2. Remove the ST relay from the engine room relay block.

    3. Disconnect the A90 power management control ECU connector.

    4. Disconnect the A39 clutch start switch assembly connector.

    5. Disconnect the B1 starter assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A108-53 (STA) - 2 (ST relay holder) Always Below 1 Ω
      1 (ST relay holder) - Body ground Always Below 1 Ω
      3 (ST relay holder) - B1-1 Always Below 1 Ω
      A108-53 (STA) or 2 (ST relay holder) - Body ground Always 10 kΩ or higher
      3 (ST relay holder) or B1-1 - Body ground Always 10 kΩ or higher

    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  5. CHECK HARNESS AND CONNECTOR (ECM - ST RELAY - BODY GROUND)


    1. Disconnect the A108 ECM connector.

    2. Remove the ST relay from the engine room relay block.

    3. Disconnect the A90 power management control ECU connector.

    4. Disconnect the A39 clutch start switch assembly connector.

    5. Disconnect the A92 engine stop and start ECU connector.

    6. Disconnect the B1 starter assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      2 (ST relay holder) - A108-53 (STA) Always Below 1 Ω
      1 (ST relay holder) - Body ground Always Below 1 Ω
      A108-53 (STA) - A92-21 (STA) Always Below 1 Ω
      3 (ST relay holder) - B1-1 Always Below 1 Ω
      A108-53 (STA), 2 (ST relay holder) or A92-21 (STA) - Body ground Always 10 kΩ or higher
      3 (ST relay holder) or B1-1 - Body ground Always 10 kΩ or higher

    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  6. READ VALUE USING GTS (STARTER SIGNAL)


    1. Disconnect the A90 power management control ECU connector.

    2. Connect the GTS to the DLC3.

    3. Turn the ignition switch to ON.

    4. Turn the GTS on.

    5. Enter the following menu items: Powertrain / Engine and ECT / Data List / Starter Signal.

    6. Check the value displayed on the GTS when the ignition switch is turned to the ON and START positions.

      OK
      Ignition Switch Position Starter Signal
      ON OFF
      START ON
      Result
      Result Proceed to
      NG A
      OK (w/ Stop and Start System) B
      OK (w/o Stop and Start System) C

    B

    REPLACE POWER MANAGEMENT CONTROL ECU Click here

    C

    REPLACE POWER MANAGEMENT CONTROL ECU Click here

    A

  7. INSPECT IGNITION OR STARTER SWITCH ASSEMBLY


    1. Inspect the ignition or starter switch assembly Click here.


    NG

    REPLACE IGNITION OR STARTER SWITCH ASSEMBLY Click here

    OK

  8. INSPECT CLUTCH START SWITCH ASSEMBLY


    1. Inspect the clutch start switch assembly Click here.

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

    B

    CHECK HARNESS AND CONNECTOR (IGNITION OR STARTER SWITCH - CLUTCH START SWITCH - ENGINE STOP AND START ECU) Click here

    C

    REPLACE CLUTCH START SWITCH ASSEMBLY Click here

    A

  9. CHECK HARNESS AND CONNECTOR (CLUTCH START SWITCH ASSEMBLY - IGNITION OR STARTER SWITCH ASSEMBLY)


    1. Disconnect the A39 clutch start switch assembly connector.

    2. Disconnect the F13 ignition or starter switch assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A39-2 - F13-7 (ST2) Always Below 1 Ω
      A39-2 or F13-7 (ST2) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  10. CHECK HARNESS AND CONNECTOR (ECM - CLUTCH START SWITCH ASSEMBLY - ST RELAY - POWER MANAGEMENT CONTROL ECU)


    1. Disconnect the A108 ECM connector.

    2. Disconnect the A39 clutch start switch assembly connector.

    3. Remove the ST relay from the engine room relay block.

    4. Disconnect the A90 power management control ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A108-53 (STA) - A39-1 Always Below 1 Ω
      A108-53 (STA) - A90-5 (STA) Always Below 1 Ω
      A108-53 (STA) - 2 (ST relay holder) Always Below 1 Ω
      A108-53 (STA), A90-5 (STA), A39-1 or 2 (ST relay holder) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  11. CHECK IGNITION OR STARTER SWITCH ASSEMBLY (POWER SOURCE)

    A01VJSIE01
    Text in Illustration
    *a

    Front view of wire harness connector

    (to Ignition or Starter Switch Assembly)

    1. Disconnect the ignition or starter switch assembly connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      F13-5 (AM2) - Body ground Always 11 to 14 V

    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (IGNITION OR STARTER SWITCH ASSEMBLY - BATTERY)

  12. CHECK HARNESS AND CONNECTOR (IGNITION OR STARTER SWITCH - CLUTCH START SWITCH - ENGINE STOP AND START ECU)


    1. Disconnect the F13 ignition or starter switch assembly connector.

    2. Disconnect the A39 clutch start switch assembly connector.

    3. Disconnect the A92 engine stop and start ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F13-7 (ST2) - A39-2 Always Below 1 Ω
      A39-2 - A92-28 (CLL) Always Below 1 Ω
      F13-7 (ST2), A39-2 or A92-28 (CLL) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  13. CHECK HARNESS AND CONNECTOR (ECM - CLUTCH START SWITCH - ST RELAY - POWER MANAGEMENT CONTROL ECU - ENGINE STOP AND START ECU)


    1. Disconnect the A108 ECM connector.

    2. Disconnect the A39 clutch start switch assembly connector.

    3. Remove the ST relay from the engine room relay block.

    4. Disconnect the A90 power management control ECU connector.

    5. Disconnect the A92 engine stop and start ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A108-53 (STA) - A39-1 Always Below 1 Ω
      A108-53 (STA) - A90-5 (STA) Always Below 1 Ω
      A39-1 - 2 (ST relay holder) Always Below 1 Ω
      A108-53 (STA) - A92-21 (STA) Always Below 1 Ω
      A108-53 (STA), A90-5 (STA), A39-1, 2 (ST relay holder) or A92-21 (STA) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  14. CHECK IGNITION OR STARTER SWITCH ASSEMBLY (POWER SOURCE)

    A01VJSIE01
    Text in Illustration
    *a

    Front view of wire harness connector

    (to Ignition or Starter Switch Assembly)

    1. Disconnect the ignition or starter switch assembly connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      F13-5 (AM2) - Body ground Always 11 to 14 V

    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (IGNITION OR STARTER SWITCH ASSEMBLY - BATTERY)

  15. READ VALUE USING GTS (STARTER SIGNAL)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menu items: Powertrain / Engine and ECT / Data List / Starter Signal.

    5. Check the value displayed on the GTS when the ignition switch is turned to the ON and START positions.

      OK
      Ignition Switch Position Starter Signal
      ON OFF
      START ON
      Result
      Result Proceed to
      OK A
      NG (w/o Stop and Start System) B
      NG (w/ Stop and Start System) C

    A

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

    C

    CHECK HARNESS AND CONNECTOR (ECM - ST RELAY) Click here

    B

  16. CHECK HARNESS AND CONNECTOR (ECM - ST RELAY)


    1. Disconnect the A108 ECM connector.

    2. Disconnect the A39 clutch start switch assembly connector.

    3. Disconnect the A90 power management control ECU connector.

    4. Remove the ST relay from the engine room relay block.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A108-53 (STA) - 2 (ST relay holder) Always Below 1 Ω

    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  17. CHECK HARNESS AND CONNECTOR (ECM - ST RELAY)


    1. Disconnect the A108 ECM connector.

    2. Disconnect the A39 clutch start switch assembly connector.

    3. Disconnect the A90 power management control ECU connector.

    4. Remove the ST relay from the engine room relay block.

    5. Disconnect the A92 engine stop and start ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A108-53 (STA) - 2 (ST relay holder) Always Below 1 Ω

    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR