СИСТЕМА ECD Starter Signal Circuit

DESCRIPTION


WIRING DIAGRAM

A01IRNTE02

INSPECTION PROCEDURE

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. INSPECT STARTER RELAY (ST)


    1. Inspect the starter relay Click here.


    NG

    REPLACE STARTER RELAY (ST)

    OK

  3. 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 menus: 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

  4. CHECK HARNESS AND CONNECTOR (ST RELAY HOLDER TERMINAL VOLTAGE)


    1. A01ITNLE05
      Text in Illustration
      *1 No. 3 Relay Block
      *2 ST Relay Holder

      Remove the ST relay from the No. 3 relay block.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      1 (ST relay holder) - Body ground Cranking 11 to 14 V
      5 (ST relay holder) - Body ground Always 11 to 14 V
      Result
      Result Proceed to
      Normal A
      Abnormal (ST relay holder terminal 1) B
      Abnormal (ST relay holder terminal 5) C

    B

    REPAIR OR REPLACE HARNESS OR CONNECTOR (ECM - ST RELAY HOLDER)

    C

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

    A

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


    1. A01ITNLE05
      Text in Illustration
      *1 No. 3 Relay Block
      *2 ST Relay Holder

      Remove the ST relay from the No. 3 relay block.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      2 (ST relay holder) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. CHECK HARNESS AND CONNECTOR (STARTER ASSEMBLY - ST RELAY HOLDER)


    1. Remove the ST relay from the No. 3 relay block.

    2. Disconnect the starter assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      C92-1 - 3 (ST relay holder) Always Below 1 Ω
      C92-1 or 3 (ST relay holder) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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

  7. READ VALUE USING GTS (STARTER SIGNAL)


    1. Disconnect the 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 menus: 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
      OK (for LHD) A
      OK (for RHD) B
      NG C

    B

    REPLACE POWER MANAGEMENT CONTROL ECU Click here

    C

    CHECK HARNESS AND CONNECTOR (CLUTCH START SWITCH TERMINAL VOLTAGE) Click here

    A

    REPLACE POWER MANAGEMENT CONTROL ECU Click here

  8. CHECK HARNESS AND CONNECTOR (CLUTCH START SWITCH TERMINAL VOLTAGE)


    1. A01INWBE02
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Clutch Start Switch Assembly)

      Disconnect the clutch start switch assembly connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A4-2 - Body ground Cranking 11 to 14 V

    NG

    CHECK HARNESS AND CONNECTOR (IGNITION SWITCH TERMINAL VOLTAGE) Click here

    OK

  9. INSPECT CLUTCH START SWITCH ASSEMBLY


    1. Inspect the clutch start switch assembly Click here.


    NG

    REPLACE CLUTCH START SWITCH ASSEMBLY

    OK

    REPAIR OR REPLACE HARNESS OR CONNECTOR (ECM - CLUTCH START SWITCH ASSEMBLY - POWER MANAGEMENT CONTROL ECU - ST RELAY HOLDER)

  10. CHECK HARNESS AND CONNECTOR (IGNITION SWITCH TERMINAL VOLTAGE)


    1. A01IOQ6E02
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Ignition Switch Assembly)

      Disconnect the ignition switch assembly connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      H6-7 (AM2) - Body ground Always 11 to 14 V

    NG

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

    OK

  11. INSPECT IGNITION SWITCH ASSEMBLY


    1. Inspect the ignition switch assembly Click here.


    NG

    REPLACE IGNITION SWITCH ASSEMBLY Click here

    OK

    REPAIR OR REPLACE HARNESS OR CONNECTOR (IGNITION SWITCH ASSEMBLY - CLUTCH START SWITCH ASSEMBLY)

  12. 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 menus: 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

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

    OK

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

  13. CHECK HARNESS AND CONNECTOR (ECM - ST RELAY HOLDER)

    A01IRIWE02

    1. Disconnect the ECM connector.

    2. Disconnect the power management control ECU connector.

    3. Disconnect the clutch start switch assembly connector.

    4. Remove the ST relay from the No. 3 relay block.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A76-36 (STA) - 1(ST relay holder) Always Below 1 Ω
      Text in Illustration
      *1 No. 3 Relay Block *2 ST Relay Holder
      *a

      Front view of wire harness connector

      (to ECM)

      		 - -

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE ECM Click here