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ECD SYSTEM (for DPF) Starter Signal Circuit

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DTC Code DTC Name
  Starter Signal Circuit
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DESCRIPTION

While the engine is being cranked, current flows from terminal ST2 of the ignition switch to the ST fuse and also flows to terminal STA of the ECM (STA signal).

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WIRING DIAGRAM

Refer to DTC P0617 (Click here).

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INSPECTION PROCEDURE

Note:

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

  • After replacing the ECM, the new ECM needs registration (Click here) and initialization (Click here).

Tip:

This chart is based on the premise that the engine can crank normally. If the engine cannot crank normally, proceed to the problem symptoms table (Click here).

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PROCEDURE


  1. Click here

    CHECK IF VEHICLE IS EQUIPPED WITH ENTRY AND START SYSTEM


    1. Check if the vehicle is equipped with the entry and start system.

      Table 1. Result
      Result Proceed to
      w/o Entry and Start System A
      w/ Entry and Start System B

  2. Click here

    READ VALUE USING INTELLIGENT TESTER (STARTER SIGNAL)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the tester on.

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

    5. Read the value.

      OK
      Ignition Switch Position Starter Signal
      ON OFF
      START ON

  3. Click here

    CHECK STARTER RELAY (POWER SOURCE)


    1. A01IN0NE01

      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 Engine cranking 11 to 14 V
      Table 2. Text in Illustration
      *1 No. 3 relay block
      *2 ST Relay
      Tip:

      The engine does not crank because the relay is not installed.

    3. Reinstall the ST relay.


  4. Click here

    INSPECT STARTER RELAY


    1. A01IOTM

      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
      3 - 5 Battery voltage not applied between terminals 1 and 2 10 kΩ or higher
      3 - 5 Battery voltage applied between terminals 1 and 2 Below 1 Ω

    3. Reinstall the ST relay.


  5. Click here

    CHECK HARNESS AND CONNECTOR (ST RELAY - BODY GROUND)


    1. A01IN0NE01

      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
      Table 3. Text in Illustration
      *1 No. 3 relay block
      *2 ST Relay

    3. Reinstall the ST relay.


  6. Click here

    CHECK HARNESS AND CONNECTOR (ST RELAY - CLUTCH PEDAL SWITCH ASSEMBLY)


    1. A01ITOOE11

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

    2. Disconnect the clutch pedal switch assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      1 (ST relay holder) - A4-1 Always Below 1 Ω
      1 (ST relay holder) or A4-1 - Body ground Always 10 kΩ or higher
      Table 4. Text in Illustration
      *1 No. 3 relay block
      *2 ST Relay
      *a

      Front view of wire harness connector

      (to Clutch Pedal Switch Assembly)

    4. Reinstall the ST relay.

    5. Reconnect the clutch pedal switch assembly connector.


  7. Click here

    INSPECT CLUTCH PEDAL SWITCH


    1. A01IRYSE11

      Disconnect the clutch pedal switch assembly connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      1 - 2 Pin not pushed 10 kΩ or higher
      Pin pushed Below 1 Ω
      Table 5. Text in Illustration
      *a

      Component without harness connected

      (Clutch Pedal Switch Assembly)
      *b On (Pushed)
      *c Off (Not Pushed)

    3. Reconnect the clutch pedal switch assembly connector.


  8. Click here

    CHECK HARNESS AND CONNECTOR (CLUTCH PEDAL SWITCH ASSEMBLY - IGNITION SWITCH ASSEMBLY)


    1. A01IRQPE09

      Disconnect the clutch pedal switch assembly connector.

    2. Disconnect the ignition switch assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A4-2 - H6-1 (ST1) Always Below 1 Ω
      A4-2 or H6-1 (ST1) - Body ground Always 10 kΩ or higher
      Table 6. Text in Illustration
      *a

      Front view of wire harness connector

      (to Clutch Pedal Switch Assembly)
      *b

      Front view of wire harness connector

      (to Ignition Switch Assembly)

    4. Reconnect the clutch pedal switch assembly connector.

    5. Reconnect the ignition switch assembly connector.


  9. Click here

    INSPECT IGNITION SWITCH ASSEMBLY


    1. A01IT63E27

      Disconnect the ignition switch assembly connector.

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

      Standard Resistance
      Tester Connection Ignition Switch Position Specified Condition
      All terminals Off 10 kΩ or higher
      2 (AM1) - 1 (ST1) START Below 1 Ω
      Table 7. Text in Illustration
      *a

      Component without harness connected

      (Ignition Switch Assembly)

    3. Reconnect the ignition switch assembly connector.


  10. Click here

    READ VALUE USING INTELLIGENT TESTER (STARTER SIGNAL)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the tester on.

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

    5. Read the value.

      OK
      Ignition Switch Position Starter Signal
      ON OFF
      START ON

  11. Click here

    CHECK STARTER RELAY (POWER SOURCE)


    1. A01IN0NE01

      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 Engine cranking 11 to 14 V
      Tip:

      The engine does not crank because the relay is not installed.

      Table 8. Text in Illustration
      *1 No. 3 relay block
      *2 ST Relay

    3. Reinstall the ST relay.


  12. Click here

    INSPECT STARTER RELAY


    1. A01IOTM

      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
      3 - 5 Battery voltage not applied between terminals 1 and 2 10 kΩ or higher
      3 - 5 Battery voltage applied between terminals 1 and 2 Below 1 Ω

    3. Reinstall the ST relay.


  13. Click here

    CHECK HARNESS AND CONNECTOR (ST RELAY - BODY GROUND)


    1. A01IN0NE01

      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
      Table 9. Text in Illustration
      *1 No. 3 relay block
      *2 ST Relay

    3. Reinstall the ST relay.


  14. Click here

    CHECK HARNESS AND CONNECTOR (ST RELAY - CLUTCH PEDAL SWITCH ASSEMBLY)


    1. A01ITOOE11

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

    2. Disconnect the clutch pedal switch assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      1 (ST relay holder) - A4-1 Always Below 1 Ω
      1 (ST relay holder) or A4-1 - Body ground Always 10 kΩ or higher
      Table 10. Text in Illustration
      *1 No. 3 relay block
      *2 ST Relay
      *a

      Front view of wire harness connector

      (to Clutch Pedal Switch Assembly)

    4. Reinstall the ST relay.

    5. Reconnect the clutch pedal switch assembly connector.


  15. Click here

    INSPECT CLUTCH PEDAL SWITCH


    1. A01IRYSE11

      Disconnect the clutch pedal switch assembly connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      1 - 2 Pin not pushed 10 kΩ or higher
      Pin pushed Below 1 Ω
      Table 11. Text in Illustration
      *a

      Component without harness connected

      (Clutch Pedal Switch Assembly)
      *b On (Pushed)
      *c Off (Not Pushed)

    3. Reconnect the clutch pedal switch assembly connector.


  16. Click here

    CHECK HARNESS AND CONNECTOR (CLUTCH PEDAL SWITCH ASSEMBLY - POWER MANAGEMENT CONTROL ECU)


    1. A01IPBKE14

      Disconnect the clutch pedal switch assembly connector.

    2. Disconnect the power management control ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A4-2 - H70-3 (STAR) Always Below 1 Ω
      A4-2 or H70-3 (STAR) - Body ground Always 10 kΩ or higher
      Table 12. Text in Illustration
      *a

      Front view of wire harness connector

      (to Clutch Pedal Switch Assembly)
      *b

      Rear view of wire harness connector

      (to Power Management Control ECU)

    4. Reconnect the clutch pedal switch assembly connector.

    5. Reconnect the power management control ECU connector.


  17. Click here

    PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

  18. Click here

    REPLACE STARTER RELAY

  19. Click here

    REPAIR OR REPLACE HARNESS OR CONNECTOR (ST RELAY - BODY GROUND)

  20. Click here

    REPAIR OR REPLACE HARNESS OR CONNECTOR (ECM - CLUTCH PEDAL SWITCH ASSEMBLY)

  21. Click here

    REPAIR OR REPLACE HARNESS OR CONNECTOR (ST RELAY - CLUTCH PEDAL SWITCH ASSEMBLY)

  22. Click here

    REPLACE CLUTCH PEDAL SWITCHClick here

  23. Click here

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

  24. Click here

    REPLACE IGNITION SWITCH ASSEMBLYClick here

  25. Click here

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

  26. Click here

    PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLEClick here

  27. Click here

    REPLACE STARTER RELAY

  28. Click here

    REPAIR OR REPLACE HARNESS OR CONNECTOR (ST RELAY - BODY GROUND)

  29. Click here

    REPAIR OR REPLACE HARNESS OR CONNECTOR (ECM - CLUTCH PEDAL SWITCH ASSEMBLY)

  30. Click here

    REPAIR OR REPLACE HARNESS OR CONNECTOR (ST RELAY - CLUTCH PEDAL SWITCH ASSEMBLY)

  31. Click here

    REPLACE CLUTCH PEDAL SWITCH

  32. Click here

    REPAIR OR REPLACE HARNESS OR CONNECTOR (CLUTCH PEDAL SWITCH ASSEMBLY - POWER MANAGEMENT CONTROL ECU)

  33. Click here

    GO TO ENTRY AND START SYSTEMClick here