SFI SYSTEM(w/o Canister Pump Module) 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 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 procedure.

  • After turning engine switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work.

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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 / Data List / All Data / Starter Signal.


      Powertrain > Engine > Data List
      Tester Display
      Starter Signal

    5. Check the value displayed on the GTS when the engine switch is turned on (IG) and the engine is started.

      OK
      Condition GTS Display (Starter Signal)
      Engine switch on (IG) OFF
      Engine started ON
      Result
      Proceed to
      OK
      NG

    NG

    INSPECT PARK/NEUTRAL POSITION SWITCH Click here

    OK

  3. INSPECT ST RELAY


    1. Inspect the ST relay.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE ST RELAY

    OK

  4. INSPECT STARTER ASSEMBLY


    1. Inspect the starter assembly.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE STARTER ASSEMBLY Click here

    OK

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


    1. Remove the ST relay from the No. 1 engine room relay block.

    2. Disconnect the E43 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 relay holder) - E43-1 Always Below 1 Ω
      3 (ST relay holder) or E43-1 - Body ground and other terminals Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. CHECK HARNESS AND CONNECTOR (BATTERY - STARTER ASSEMBLY)


    1. Disconnect the cable from the negative (-) battery terminal.

    2. Disconnect the cable from the positive (+) battery terminal.

    3. Disconnect the F2 starter assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      Positive (+) battery terminal - F2-1 Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. Remove the ST relay from the No. 1 engine room relay block.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      1 (ST relay holder) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. Remove the ST relay from the No. 1 engine room relay block.

    2. Disconnect the E25 park/neutral position switch connector.

    3. Disconnect the A21 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
      E25-5 (L) - 2 (ST relay holder) Always Below 1 Ω
      A21-7 (STA) - 2 (ST relay holder) Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  9. CHECK HARNESS AND CONNECTOR (BATTERY - ST RELAY)


    1. Remove the ST relay from the No. 1 engine room relay block.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      5 (ST relay holder) - Body ground Always 11 to 14 V
      Result
      Result Proceed to
      OK (w/ Entry function) A
      OK (w/o Entry function) B
      NG C

    A

    GO TO ENTRY AND START SYSTEM Click here

    B

    GO TO PUSH-BUTTON START Click here

    C

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  10. INSPECT PARK/NEUTRAL POSITION SWITCH


    1. Inspect the park/neutral position switch.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE PARK/NEUTRAL POSITION SWITCH Click here

    OK

  11. CHECK HARNESS AND CONNECTOR (PARK/NEUTRAL POSITION SWITCH - ECM - ST RELAY - CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - TCM)


    1. Disconnect the E25 park/neutral position switch connector.

    2. Disconnect the A13 ECM connector.

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

    4. Disconnect the A21 certification ECU (smart key ECU assembly) connector.

    5. Disconnect the A28 TCM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      E25-5 (L) - A13-20 (STA) Always Below 1 Ω
      E25-5 (L), A13-20 (STA), 2 (ST relay holder), A21-7 (STA) or A28-15 (STA) - Body ground and other terminals Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. Disconnect the A21 certification ECU (smart key ECU assembly) connector.

    2. Disconnect the E25 park/neutral position switch connector.

    3. Disconnect the A13 ECM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A21-5 (STAR) - E25-4 (B) Always Below 1 Ω
      A21-5 (STAR) - A13-31 (NSW) Always Below 1 Ω
      A21-5 (STAR), E25-4 (B) or A13-31 (NSW) - Body ground and other terminals Always 10 kΩ or higher
      Result
      Result Proceed to
      OK (w/ Entry function) A
      OK (w/o Entry function) B
      NG C

    A

    GO TO ENTRY AND START SYSTEM Click here

    B

    GO TO PUSH-BUTTON START Click here

    C

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  13. 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 / Data List / All Data / Starter Signal.


      Powertrain > Engine > Data List
      Tester Display
      Starter Signal

    5. Check the value displayed on the GTS when the engine switch is turned on (IG) and the engine is started.

      OK
      Condition GTS Display (Starter Signal)
      Engine switch on (IG) OFF
      Engine started ON
      Result
      Proceed to
      OK
      NG

    OK

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

    NG

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