SFI SYSTEM Starter Signal Circuit

DESCRIPTION



WIRING DIAGRAM

Refer to DTC P061512.

Click here

CAUTION / NOTICE / HINT

Note


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

  • After turning ignition 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.

    Click here

  • When the starter assembly is replaced, the number of starter operations stored in the engine stop and start ECU must be reset (w/ Stop and Start System).

    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 SW) Click here

    A

  2. READ VALUE USING GTS (STARTER SW)


    1. Connect the GTS to DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Engine / Data List / All Data / Starter SW.


      Powertrain > Engine > Data List
      Tester Display
      Starter SW

    5. Check the value displayed on the GTS when the ignition switch is turned to ON and the engine is started.

      OK
      Condition GTS Display (Starter SW)
      Ignition switch ON OFF
      Cranking position ON
      Result
      Result Proceed to
      OK A
      NG (for CVT) B
      NG (for Manual Transaxle) C

    B

    INSPECT PARK/NEUTRAL POSITION SWITCH Click here

    C

    INSPECT CLUTCH START SWITCH ASSEMBLY Click here

    A

  3. INSPECT RELAY (ST RELAY)


    1. Inspect the ST relay.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE ST RELAY

    OK

  4. CHECK HARNESS AND CONNECTOR (ST RELAY - ECM)


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

    2. Disconnect the A38 ECM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      2 (ST relay holder) - A38-29 (STA) Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. A005Q86C19
      *1 No. 1 Engine Room Relay Block
      *2 ST Relay Holder

      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
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


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

    2. Disconnect the C34 starter assembly (TMC Made) connector.

    3. Disconnect the C35 starter assembly (TMMT Made) connector.

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

      Standard Resistance (TMC Made)
      Tester Connection Condition Specified Condition
      3 (ST relay holder) - C34-1 Always Below 1 Ω
      3 (ST relay holder) or C34-1 - Body ground and other terminals Always 10 kΩ or higher
      Standard Resistance (TMMT Made)
      Tester Connection Condition Specified Condition
      3 (ST relay holder) - C35-1 Always Below 1 Ω
      3 (ST relay holder) or C35-1 - Body ground and other terminals Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. A005Q86C19
      *1 No. 1 Engine Room Relay Block
      *2 ST Relay Holder

      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. INSPECT STARTER ASSEMBLY


    1. Inspect the starter assembly.

      for Denso Made with Stop and Start System: Click here

      for Denso Made without Stop and Start System: Click here

      for Valeo Made Cold Area Specification Vehicles: Click here

      for Valeo Made except Cold Area Specification Vehicles: Click here

      Result
      Result Proceed to
      OK A
      NG (for Denso Made with Stop and Start System) B
      NG (for Denso Made without Stop and Start System) C
      NG (for Valeo Made Cold Area Specification Vehicles) D
      NG (for Valeo Made except Cold Area Specification Vehicles) E

    A

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

    B

    REPLACE STARTER ASSEMBLY for Denso Made with Stop and Start System: Click here

    C

    REPLACE STARTER ASSEMBLY for Denso Made without Stop and Start System: Click here

    D

    REPLACE STARTER ASSEMBLY for Valeo Made Cold Area Specification Vehicles: Click here

    E

    REPLACE STARTER ASSEMBLY for Valeo Made except Cold Area Specification Vehicles: Click here

  9. INSPECT PARK/NEUTRAL POSITION SWITCH


    1. Inspect the park/neutral position switch.

      for 2WD: Click here

      for AWD: Click here

      Result
      Result Proceed to
      OK A
      NG (for 2WD) B
      NG (for AWD) C

    B

    REPLACE PARK/NEUTRAL POSITION SWITCH Click here

    C

    REPLACE PARK/NEUTRAL POSITION SWITCH Click here

    A

  10. CHECK HARNESS AND CONNECTOR (PARK/NEUTRAL POSITION SWITCH VOLTAGE)


    1. A005OIWC30
      *a

      Front view of wire harness connector

      (to Park/Neutral Position Switch)

      Disconnect C36 the park/neutral position switch connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      C36-4 (B) - Body ground Engine cranking position 11 to 14 V
      Result
      Result Proceed to
      OK (w/ Entry and Start System) A
      OK (w/o Entry and Start System) B
      NG (w/ Entry and Start System) C
      NG (w/o Entry and Start System) D

    B

    CHECK HARNESS AND CONNECTOR (ST RELAY - PARK/NEUTRAL POSITION SWITCH - ECM) Click here

    C

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

    D

    INSPECT IGNITION OR STARTER SWITCH ASSEMBLY Click here

    A

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


    1. Disconnect the M66 certification ECU (smart key ECU assembly) connector.

    2. Disconnect the C36 park/neutral position switch connector.

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

    4. Disconnect the A38 ECM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      M66-20 (STA) - C36-9 (L) Always Below 1 Ω
      2 (ST relay holder) - A38-29 (STA) Always Below 1 Ω
      A38-29 (STA), M66-20 (STA), 2 (ST relay holder) or C36-9 (L) - Body ground and other terminals Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    CHECK ENTRY AND START SYSTEM (FOR START FUNCTION) Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

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


    1. Disconnect the C36 park/neutral position switch connector.

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

    3. Disconnect the A38 ECM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      2 (ST relay holder) - C36-9 (L) Always Below 1 Ω
      2 (ST relay holder) - A38-29 (STA) Always Below 1 Ω
      A38-29 (STA), 2 (ST relay holder) or C36-9 (L) - Body ground and other terminals Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  13. INSPECT IGNITION OR STARTER SWITCH ASSEMBLY


    1. Inspect the ignition or starter switch assembly.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE IGNITION OR STARTER SWITCH ASSEMBLY Click here

    OK

  14. CHECK HARNESS AND CONNECTOR (IGNITION OR STARTER SWITCH ASSEMBLY VOLTAGE)


    1. Disconnect the F12 ignition or starter switch assembly connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      F12-5 (AM1) - Body ground Always 11 to 14 V
      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 (BATTERY - IGNITION OR STARTER SWITCH ASSEMBLY)

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


    1. Disconnect the M66 certification ECU (smart key ECU assembly) connector.

    2. Disconnect the C36 park/neutral position switch connector.

    3. Disconnect the A38 ECM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      M66-9 (STAR) - C36-4 (B) Always Below 1 Ω
      A38-57 (NSW), M66-9 (STAR) or C36-4 (B) - Body ground and other terminals Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    CHECK ENTRY AND START SYSTEM (FOR START FUNCTION) Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  16. INSPECT IGNITION OR STARTER SWITCH ASSEMBLY


    1. Inspect the ignition or starter switch assembly.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE IGNITION OR STARTER SWITCH ASSEMBLY Click here

    OK

  17. CHECK HARNESS AND CONNECTOR (IGNITION OR STARTER SWITCH ASSEMBLY VOLTAGE)


    1. Disconnect the F12 ignition or starter switch assembly connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      F12-5 (AM1) - Body ground Always 11 to 14 V
      Result
      Proceed to
      OK
      NG

    OK

    REPAIR OR REPLACE HARNESS OR CONNECTOR (IGNITION OR STARTER SWITCH ASSEMBLY - PARK/NEUTRAL POSITION SWITCH - ENGINE STOP AND START ECU - ECM)

    NG

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

  18. INSPECT CLUTCH START SWITCH ASSEMBLY


    1. Inspect the clutch start switch assembly.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE CLUTCH START SWITCH ASSEMBLY Click here

    OK

  19. CHECK HARNESS AND CONNECTOR (CLUTCH START SWITCH ASSEMBLY VOLTAGE)


    1. Disconnect the A51 clutch start switch assembly connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A51-2 - Body ground Engine cranking position 11 to 14 V
      Result
      Result Proceed to
      OK (w/ Entry and Start System) A
      OK (w/o Entry and Start System) *2 B
      OK (w/o Entry and Start System) *1 C
      NG (w/ Entry and Start System) D
      NG (w/o Entry and Start System) *2 E
      NG (w/o Entry and Start System) *1 F

      *1: w/ Stop and Start System

      *2: w/o Stop and Start System


    B

    REPAIR OR REPLACE HARNESS OR CONNECTOR (ECM - CLUTCH START SWITCH ASSEMBLY - ST NO. 1 RELAY)

    C

    CHECK HARNESS AND CONNECTOR (ENGINE STOP AND START ECU - ST RELAY - CLUTCH START SWITCH ASSEMBLY - ECM) Click here

    D

    CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - ECM - CLUTCH START SWITCH ASSEMBLY) Click here

    E

    INSPECT IGNITION OR STARTER SWITCH ASSEMBLY Click here

    F

    INSPECT IGNITION OR STARTER SWITCH ASSEMBLY Click here

    A

  20. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - ST RELAY - CLUTCH START SWITCH ASSEMBLY - ECM)


    1. Disconnect the M66 certification ECU (smart key ECU assembly) connector.

    2. Disconnect the A51 clutch start switch assembly connector.

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

    4. Disconnect the A38 ECM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      M66-20 (STA) - A51-1 Always Below 1 Ω
      2 (ST relay holder) - A38-29 (STA) Always Below 1 Ω
      A38-29 (STA), M66-20 (STA), 2 (ST relay holder) or A51-1 - Body ground and other terminals Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    CHECK ENTRY AND START SYSTEM (FOR START FUNCTION) Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  21. CHECK HARNESS AND CONNECTOR (ENGINE STOP AND START ECU - ST RELAY - CLUTCH START SWITCH ASSEMBLY - ECM)


    1. Disconnect the A62 engine stop and start ECU connector.

    2. Disconnect the A51 clutch start switch assembly connector.

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

    4. Disconnect the A38 ECM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A62-21 (STA) - 2 (ST relay) Always Below 1 Ω
      2 (ST relay holder) - A51-1 Always Below 1 Ω
      2 (ST relay holder) - A38-29 (STA) Always Below 1 Ω
      A62-21 (STA), A38-29 (STA), 2 (ST relay holder) or A51-1 - Body ground and other terminals Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    CHECK STOP AND START SYSTEM (STA SIGNAL) Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  22. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - ECM - CLUTCH START SWITCH ASSEMBLY)


    1. Disconnect the M66 certification ECU (smart key ECU assembly) connector.

    2. Disconnect the A51 clutch start switch assembly connector.

    3. Disconnect the A38 ECM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A38-57 (NSW) - A51-2 Always Below 1 Ω
      M66-9 (STAR) - A51-2 Always Below 1 Ω
      A38-57 (NSW), M66-9 (STAR) or A51-2 - Body ground and other terminals Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    CHECK ENTRY AND START SYSTEM (FOR START FUNCTION) Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  23. INSPECT IGNITION OR STARTER SWITCH ASSEMBLY


    1. Inspect the ignition or starter switch assembly.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE IGNITION OR STARTER SWITCH ASSEMBLY Click here

    OK

  24. CHECK HARNESS AND CONNECTOR (IGNITION OR STARTER SWITCH ASSEMBLY VOLTAGE)


    1. Disconnect the F12 ignition or starter switch assembly connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      F12-5 (AM1) - Body ground Always 11 to 14 V
      Result
      Proceed to
      OK
      NG

    OK

    REPAIR OR REPLACE HARNESS OR CONNECTOR (IGNITION OR STARTER SWITCH ASSEMBLY - CLUTCH START SWITCH ASSEMBLY - ECM)

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  25. INSPECT IGNITION OR STARTER SWITCH ASSEMBLY


    1. Inspect the ignition or starter switch assembly.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE IGNITION OR STARTER SWITCH ASSEMBLY Click here

    OK

  26. CHECK HARNESS AND CONNECTOR (IGNITION OR STARTER SWITCH ASSEMBLY VOLTAGE)


    1. Disconnect the F12 ignition or starter switch assembly connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      F12-5 (AM1) - Body ground Always 11 to 14 V
      Result
      Proceed to
      OK
      NG

    OK

    REPAIR OR REPLACE HARNESS OR CONNECTOR (IGNITION OR STARTER SWITCH ASSEMBLY - CLUTCH START SWITCH ASSEMBLY - ENGINE STOP AND START ECU - ECM)

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  27. READ VALUE USING GTS (STARTER SW)


    1. Connect the GTS to DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Engine / Data List / All Data / Starter SW.


      Powertrain > Engine > Data List
      Tester Display
      Starter SW

    5. Check the value displayed on the GTS when the ignition switch is turned to ON and the engine is started.

      OK
      Condition GTS Display (Starter SW)
      Ignition switch ON OFF
      Cranking position 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 NO. 1 RELAY - ECM)