SFI SYSTEM Starter Signal Circuit

DESCRIPTION

While the engine is being cranked, current flows from terminal STAR of the certification ECU (smart key ECU assembly) to the park/neutral position switch assembly and to terminal STA of the ECM (STA signal).

WIRING DIAGRAM

Refer to DTC P0617 Click here.

CAUTION / NOTICE / HINT

Note

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

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 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 START.

      OK
      Engine Switch Position Display (Starter Signal)
      Engine switch on (IG) Close or OFF
      Engine started Open or ON

    NG

    INSPECT PARK/NEUTRAL POSITION SWITCH Click here

    OK

  3. INSPECT STARTER RELAY (ST)


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


    NG

    REPLACE STARTER RELAY (ST)

    OK

  4. INSPECT STARTER


    1. Inspect the starter Click here.


    NG

    REPAIR OR REPLACE STARTER Click here

    OK

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


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

    2. Disconnect the starter connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      ST relay (3) - D2-1 Always Below 1 Ω
      ST relay (3) or D2-1 - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. CHECK HARNESS AND CONNECTOR (BATTERY - STARTER)


    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
      D21-1 - Body ground Always 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  7. CHECK HARNESS AND CONNECTOR (ST 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
      ST relay (1) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  8. CHECK HARNESS AND CONNECTOR (ST RELAY - PNP SWITCH, SMART KEY ECU ASSEMBLY)


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

    2. Disconnect the PNP switch connector.

    3. Disconnect the 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
      ST relay (2) - E128-12 (STA) Always Below 1 Ω
      ST relay (2) - C24-5 Always Below 1 Ω
      ST relay (2) or E128-12 (STA) - Body ground Always 10 kΩ or higher
      ST relay (2) - C24-5 - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  9. CHECK STARTER RELAY (POWER SOURCE)

    B001XG8E02
    *1 Starter Relay (ST)
    *2 Engine Room Relay Block

    1. 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
      ST relay (5) - Body ground Always 11 to 14 V

    OK

    GO TO ENTRY AND START SYSTEM Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  10. INSPECT PARK/NEUTRAL POSITION SWITCH


    1. Inspect the Park/Neutral Position (PNP) switch Click here.


    NG

    REPLACE PARK/NEUTRAL POSITION SWITCH Click here

    OK

  11. CHECK HARNESS AND CONNECTOR (PNP SWITCH - ECM, SMART KEY ECU ASSEMBLY)


    1. Disconnect the smart key ECU assembly connector.

    2. Disconnect the PNP switch connector.

    3. Disconnect the ECM connector.

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

      Standard Resistance (for RHD)
      Tester Connection Condition Specified Condition
      C24-4 - E128-10 (STAR) Always Below 1 Ω
      C46-120 (NSW) - E128-10 (STAR) Always Below 1 Ω
      C24-4 or E128-10 (STAR) - Body ground Always 10 kΩ or higher
      C46-120 (NSW) or E128-10 (STAR) - Body ground Always 10 kΩ or higher
      Standard Resistance (for LHD)
      Tester Connection Condition Specified Condition
      C24-4 - E128-10 (STAR) Always Below 1 Ω
      C45-120 (NSW) - E128-10 (STAR) Always Below 1 Ω
      C24-4 or E128-10 (STAR) - Body ground Always 10 kΩ or higher
      C45-120 (NSW) or E128-10 (STAR) - Body ground Always 10 kΩ or higher

    OK

    GO TO SMART KEY SYSTEM

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  12. READ VALUE USING GTS (STARTER SIGNAL)


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch 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 START.

      OK
      Engine Switch Position Display (Starter Signal)
      Engine switch on (IG) Close or OFF
      Engine started Open or ON

    OK

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

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR