СИСТЕМА ECD Starter Signal Circuit

DESCRIPTION

While the engine is being cranked, current flows from terminal ST2 of the ignition or starter switch assembly*1 or terminal STAR of the certification ECU (smart key ECU assembly)*2 to the clutch start switch assembly and to terminal STA of the ECM (STA signal).

  • *1: w/o entry and start system

  • *2: w/ entry and start system

WIRING DIAGRAM

Refer to DTC P0617.

Click hereНажмите здесь

CAUTION / NOTICE / HINT

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

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

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 Нажмите здесь

    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 menus: Powertrain / Engine and ECT / Data List / All Data / Starter Signal.

      Powertrain > Engine and ECT > Data List
      Tester Display
      Starter Signal
    5. Check the value displayed on the GTS when the ignition switch is turned to the ON and START positions.

      OK
      Switch Position Starter Signal
      ON OFF
      START ON
      Result
      Proceed to
      OK
      NG
    NG Нажмите здесь

    OK
  3. INSPECT ST NO. 1 RELAY

    1. Inspect the ST NO. 1 relay.

      Click hereНажмите здесь

      Result
      Proceed to
      OK
      NG
    NG

    REPLACE ST NO. 1 RELAY


    OK
  4. INSPECT STARTER ASSEMBLY

    1. Inspect the starter assembly.

      Click hereНажмите здесь

      Result
      Proceed to
      OK
      NG
    NG

    REPLACE STARTER ASSEMBLY Click hereНажмите здесь


    OK
  5. CHECK HARNESS AND CONNECTOR (ST NO. 1 RELAY - STARTER ASSEMBLY)

    1. Remove the ST NO. 1 relay from the engine room relay block and junction block assembly.

    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
      3 (ST NO. 1 relay) - B8-1 Always Below 1 Ω
      3 (ST NO. 1 relay) or B8-1 - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR


    OK
  6. CHECK TERMINAL VOLTAGE (POWER SOURCE OF STARTER ASSEMBLY)

    1. Disconnect the starter assembly connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      s4-1 - Body ground Always 11 to 14 V
      Result
      Proceed to
      OK
      NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR


    OK
  7. CHECK TERMINAL VOLTAGE (POWER SOURCE OF ST NO. 1 RELAY)

    1. Remove the ST NO. 1 relay from the engine room relay block and junction block assembly.

      A012KUTC04
      *1 Engine Room Relay Block and Junction Block Assembly
      *2 ST NO. 1 Relay
    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Condition Specified Condition
      5 (ST NO. 1 relay) - Body ground Always 11 to 14 V
      Result
      Proceed to
      OK
      NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (BATTERY - ST NO. 1 RELAY)


    OK
  8. CHECK HARNESS AND CONNECTOR (ST NO. 1 RELAY - BODY GROUND)

    1. Remove the ST NO. 1 relay from the engine room relay block and junction block assembly.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      1 (ST NO. 1 relay) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR


    OK
  9. CHECK HARNESS AND CONNECTOR (ST NO. 1 RELAY - CLUTCH START SWITCH ASSEMBLY)

    1. Remove the ST NO. 1 relay from the engine room relay block and junction block assembly.

    2. Disconnect the clutch start switch assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      2 (ST NO. 1 relay) - A5-1 Always Below 1 Ω
      Result
      Proceed to
      OK
      NG
    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click hereНажмите здесь


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR


  10. INSPECT CLUTCH START SWITCH ASSEMBLY

    1. Inspect the clutch start switch assembly.

      Click hereНажмите здесь

      Result
      Result Proceed to
      OK (w/ entry and start system) A
      OK (w/o entry and start system) B
      NG C
    B Нажмите здесь

    C

    REPLACE CLUTCH START SWITCH ASSEMBLY Click here Нажмите здесь


    A
  11. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - CLUTCH START SWITCH ASSEMBLY - ENGINE STOP AND START ECU)

    1. Disconnect the certification ECU (smart key ECU assembly) connector.

    2. Disconnect the clutch start switch assembly connector.

    3. Disconnect the 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
      E33-5 (STAR) - A5-2 Always Below 1 Ω
      E33-5 (STAR), A5-2 or A9-28 (CLL) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR


    OK
  12. CHECK HARNESS AND CONNECTOR (CLUTCH START SWITCH ASSEMBLY - ST NO. 1 RELAY - ECM - CERTIFICATION ECU - ENGINE STOP AND START ECU)

    1. Disconnect the clutch start switch assembly connector.

    2. Remove the ST NO. 1 relay from the engine room relay block and junction block assembly.

    3. Disconnect the ECM connector.

    4. Disconnect the certification ECU (smart key ECU assembly) connector.

    5. Disconnect the 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
      A5-1 - A118-43 (STA) Always Below 1 Ω
      A5-1, 2 (ST NO. 1 relay), A118-43 (STA), E33-7 (STA) or A9-21 (STA) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG
    OK

    GO TO ENTRY AND START SYSTEM Click hereНажмите здесь


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR


  13. INSPECT IGNITION OR STARTER SWITCH ASSEMBLY

    1. Inspect the ignition or starter switch assembly.

      Click hereНажмите здесь

      Result
      Proceed to
      OK
      NG
    NG

    REPLACE IGNITION OR STARTER SWITCH ASSEMBLY Click hereНажмите здесь


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

    1. Disconnect the ignition or starter switch assembly connector.

    2. Disconnect the clutch start switch assembly connector.

    3. Disconnect the 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
      E4-2 (ST2) - A5-2 Always Below 1 Ω
      E4-2 (ST2), A5-2 or A9-28 (CLL) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR


    OK
  15. CHECK HARNESS AND CONNECTOR (CLUTCH START SWITCH ASSEMBLY - ST NO. 1 RELAY - ECM - ENGINE STOP AND START ECU)

    1. Disconnect the clutch start switch assembly connector.

    2. Remove the ST NO. 1 relay from the engine room relay block and junction block assembly.

    3. Disconnect the ECM connector.

    4. Disconnect the engine stop and start ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A5-1 - A118-43 (STA) Always Below 1 Ω
      A5-1, 2 (ST NO. 1 relay), A118-43 (STA) or A9-21 (STA) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG
    OK

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


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR


  16. 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 / All Data / Starter Signal.

      Powertrain > Engine and ECT > Data List
      Tester Display
      Starter Signal
    5. Check the value displayed on the GTS when the ignition switch is turned to the ON and START positions.

      OK
      Switch Position Starter Signal
      ON OFF
      START ON
      Result
      Proceed to
      OK
      NG
    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click hereНажмите здесь


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (ST NO. 1 RELAY - ECM)