ECD SYSTEM Starter Signal Circuit

DESCRIPTION

While the engine is being cranked, the starter signal is also sent to terminal STA of the ECM.

The starter signal mainly performs engine control when the engine is started.

WIRING DIAGRAM

Refer to DTC P0617 Click here.

CAUTION / NOTICE / HINT

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 (See page ) and initialization Click here.

Tech Tips

This chart is based on the premise that the engine can crank normally. If the engine cannot crank normally, proceed to Problem Symptoms Table Click here.

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 engine switch to on (IG).

    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 engine switch is turned to the on (IG) and START positions.

      OK
      Condition GTS Display (Starter Signal)
      Engine switch on (IG) OFF
      Engine started ON
      Result
      Result Proceed to
      OK A
      NG (for automatic transmission models) B
      NG (for manual transmission models) C

    B

    INSPECT PARK/NEUTRAL POSITION SWITCH ASSEMBLY Click here

    C

    INSPECT CLUTCH START SWITCH ASSEMBLY Click here

    A

  3. INSPECT STARTER RELAY (ST)


    1. Inspect the starter relay (ST) Click here.


    NG

    REPLACE STARTER RELAY (ST)

    OK

  4. INSPECT STARTER ASSEMBLY


    1. Inspect the starter assembly.


      Result
      Result Proceed to
      OK A
      NG (for 2.0 kW type) B
      NG (for 2.7 kW type) C

    B

    REPLACE STARTER ASSEMBLY Click here

    C

    REPLACE STARTER ASSEMBLY Click here

    A

  5. CHECK HARNESS AND CONNECTOR (STARTER RELAY - STARTER ASSEMBLY)


    1. Remove the starter relay (ST) from the engine room relay block.

    2. Disconnect the starter assembly connector.

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

      Standard Resistance (for 2.0 kW type)
      Tester Connection Condition Specified Condition
      Starter relay (ST) terminal 3 - D11-1 Always Below 1 Ω
      Starter relay (ST) terminal 3 or D11-1 - Body ground and other terminals Always 10 kΩ or higher
      Standard Resistance (for 2.7 kW type)
      Tester Connection Condition Specified Condition
      Starter relay (ST) terminal 3 - D10-1 Always Below 1 Ω
      Starter relay (ST) terminal 3 or D10-1 - Body ground and other terminals Always 10 kΩ or higher

    4. Reinstall the starter relay.

    5. Reconnect the starter assembly connector.


    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 (for 2.0 kW type)
      Tester Connection Condition Specified Condition
      D8-1 - Body ground Always 11 to 14 V
      Standard Voltage (for 2.7 kW type)
      Tester Connection Condition Specified Condition
      D9-1 - Body ground Always 11 to 14 V

    3. Reconnect the starter assembly connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  7. CHECK HARNESS AND CONNECTOR (STARTER RELAY - BODY GROUND)


    1. Remove the starter relay (ST) from the engine room relay block.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      Starter relay (ST) terminal 1 - Body ground Always Below 1 Ω
      Result
      Result Proceed to
      OK (for automatic transmission models) A
      OK (for manual transmission models) B
      NG C

    3. Reinstall the starter relay (ST).


    B

    CHECK HARNESS AND CONNECTOR (CLUTCH START SWITCH ASSEMBLY - CERTIFICATION ECU - STATER RELAY (ST)) Click here

    C

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    A

  8. CHECK HARNESS AND CONNECTOR (PARK/NEUTRAL POSITION SWITCH ASSEMBLY - CERTIFICATION ECU - STATER RELAY (ST))


    1. Remove the starter relay (ST) from the engine room relay block.

    2. Disconnect the park/neutral position switch assembly connector.

    3. Disconnect the certification ECU (Smart Key ECU Assembly) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      C159-5 (L) - Starter relay (ST) terminal 2 Always Below 1 Ω
      G213-12 (STA) - Starter relay (ST) terminal 2 Always Below 1 Ω
      C159-5 (L) or Starter relay (ST) terminal 2 - Body ground and other terminals Always 10 kΩ or higher
      G213-12 (STA) or Starter relay (ST) terminal 2 - Body ground and other terminals Always 10 kΩ or higher

    5. Reinstall the starter relay (ST).

    6. Reconnect the park/neutral position switch assembly connector.

    7. Reconnect the certification ECU (Smart Key ECU Assembly) connector.


    OK

    CHECK TERMINAL VOLTAGE (POWER SOURCE OF STARTER RELAY (ST)) Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  9. CHECK HARNESS AND CONNECTOR (CLUTCH START SWITCH ASSEMBLY - CERTIFICATION ECU - STATER RELAY (ST))


    1. Remove the starter relay (ST) from the engine room relay block.

    2. Disconnect the clutch start switch assembly connector.

    3. Disconnect the certification ECU (Smart Key ECU Assembly) connector.

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

      Standard Resistance (for LHD)
      Tester Connection Condition Specified Condition
      A40-1 - Starter relay (ST) terminal 2 Always Below 1 Ω
      G213-12 (STA) - Starter relay (ST) terminal 2 Always Below 1 Ω
      A40-1 or Starter relay (ST) terminal 2 - Body ground and other terminals Always 10 kΩ or higher
      G213-12 (STA) or Starter relay (ST) terminal 2 - Body ground and other terminals Always 10 kΩ or higher
      Standard Resistance (for RHD)
      Tester Connection Condition Specified Condition
      r1-1 - Starter relay (ST) terminal 2 Always Below 1 Ω
      G213-12 (STA) - Starter relay (ST) terminal 2 Always Below 1 Ω
      r1-1 or Starter relay (ST) terminal 2 - Body ground and other terminals Always 10 kΩ or higher
      G213-12 (STA) or Starter relay (ST) terminal 2 - Body ground and other terminals Always 10 kΩ or higher

    5. Reinstall the starter relay.

    6. Reconnect the the clutch start switch assembly connector.

    7. Reconnect the certification ECU (Smart Key ECU Assembly) connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  10. CHECK TERMINAL VOLTAGE (POWER SOURCE OF STARTER RELAY (ST))


    1. B001D89E01
      Text in Illustration
      *1 Engine Room Relay Block
      *2 Starter Relay (ST)

      Remove the starter relay (ST) 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
      Starter relay (ST) terminal 5 - Body ground Always 11 to 14 V

    3. Reinstall the starter relay (ST).


    OK

    CHECK ENTRY AND START SYSTEM Click here

    NG

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

  11. INSPECT PARK/NEUTRAL POSITION SWITCH ASSEMBLY


    1. Inspect the park/neutral position switch assembly Click here.


    NG

    REPLACE PARK/NEUTRAL POSITION SWITCH ASSEMBLY Click here

    OK

  12. CHECK HARNESS AND CONNECTOR (ECM - CERTIFICATION ECU - PARK/NEUTRAL POSITION SWITCH ASSEMBLY - STATER RELAY (ST))


    1. Remove the starter relay (ST) from the engine room relay block.

    2. Disconnect the park/neutral position switch assembly connector.

    3. Disconnect the certification ECU (Smart Key ECU Assembly) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      C159-5 (L) - Starter relay (ST) terminal 2 Always Below 1 Ω
      G213-12 (STA) - Starter relay (ST) terminal 2 Always Below 1 Ω
      C159-5 (L) or Starter relay (ST) terminal 2 - Body ground and other terminals Always 10 kΩ or higher
      G213-12 (STA) or Starter relay (ST) terminal 2 - Body ground and other terminals Always 10 kΩ or higher

    5. Reinstall the starter relay.

    6. Reconnect the park/neutral position switch assembly connector.

    7. Reconnect the certification ECU (Smart Key ECU Assembly) connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  13. CHECK HARNESS AND CONNECTOR (PARK/NEUTRAL POSITION SWITCH ASSEMBLY - CERTIFICATION ECU - ECM)


    1. Disconnect the ECM connector.

    2. Disconnect the park/neutral position switch assembly connector.

    3. Disconnect the certification ECU (Smart Key ECU Assembly) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      C159-4 (B) - G213-10 (STAR) Always Below 1 Ω
      G213-10 (STAR) - G184-11 (NSW) Always Below 1 Ω
      C159-4 (B) or G213-10 (STAR) - Body ground and other terminals Always 10 kΩ or higher
      G213-10 (STAR) or G184-11 (NSW) - Body ground and other terminals Always 10 kΩ or higher

    5. Reconnect the ECM connector.

    6. Reconnect the park/neutral position switch assembly connector.

    7. Reconnect the certification ECU (Smart Key ECU Assembly) connector.


    OK

    CHECK ENTRY AND START SYSTEM Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  14. INSPECT CLUTCH START SWITCH ASSEMBLY


    1. Inspect the clutch start switch assembly Click here.


    NG

    REPLACE CLUTCH START SWITCH ASSEMBLY

    OK

  15. CHECK HARNESS AND CONNECTOR (ECM - CERTIFICATION ECU - CLUTCH START SWITCH ASSEMBLY - STATER RELAY (ST))


    1. Remove the starter relay (ST) from the engine room relay block.

    2. Disconnect the clutch start switch assembly connector.

    3. Disconnect the certification ECU (Smart Key ECU Assembly) connector.

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

      Standard Resistance (for LHD)
      Tester Connection Condition Specified Condition
      C40-1 - Starter relay (ST) terminal 2 Always Below 1 Ω
      G213-12 (STA) - Starter relay (ST) terminal 2 Always Below 1 Ω
      C40-1 or Starter relay (ST) terminal 2 - Body ground and other terminals Always 10 kΩ or higher
      G213-12 (STA) or Starter relay (ST) terminal 2 - Body ground and other terminals Always 10 kΩ or higher
      Standard Resistance (for RHD)
      Tester Connection Condition Specified Condition
      r1-1 - Starter relay (ST) terminal 2 Always Below 1 Ω
      G213-12 (STA) - Starter relay (ST) terminal 2 Always Below 1 Ω
      r1-1 or Starter relay (ST) terminal 2 - Body ground and other terminals Always 10 kΩ or higher
      G213-12 (STA) or Starter relay (ST) terminal 2 - Body ground and other terminals Always 10 kΩ or higher

    5. Reinstall the starter relay.

    6. Reconnect the clutch start switch assembly connector.

    7. Reconnect the certification ECU (Smart Key ECU Assembly) connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  16. CHECK HARNESS AND CONNECTOR (CLUTCH START SWITCH ASSEMBLY - CERTIFICATION ECU - ECM)


    1. Disconnect the ECM connector.

    2. Disconnect the clutch start switch assembly connector.

    3. Disconnect the certification ECU (Smart Key ECU Assembly) connector.

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

      Standard Resistance (for LHD)
      Tester Connection Condition Specified Condition
      A40-2 - G213-10 (STAR) Always Below 1 Ω
      A40-2 or G213-10 (STAR) - Body ground and other terminals Always 10 kΩ or higher
      Standard Resistance (for RHD)
      Tester Connection Condition Specified Condition
      r1-2 - G213-10 (STAR) Always Below 1 Ω
      r1-2 or G213-10 (STAR) - Body ground and other terminals Always 10 kΩ or higher

    5. Reconnect the ECM connector.

    6. Reconnect the clutch start switch assembly connector.

    7. Reconnect the certification ECU (Smart Key ECU Assembly) connector.


    OK

    CHECK ENTRY AND START SYSTEM Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  17. READ VALUE USING GTS (STARTER SIGNAL)


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch to on (IG).

    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 engine switch is turned to the on (IG) and START positions.

      OK
      Condition GTS Display (Starter Signal)
      Engine switch on (IG) OFF
      Engine started ON

    OK

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

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (STARTER RELAY - ECM)