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 assembly and to terminal STA of the ECM (STA signal).

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.

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 engine switch on (IG).

    3. Turn the GTS on.

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


      Powertrain > Engine > Data List
      Tester Display
      Starter SW

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

      OK
      Condition GTS Display (Starter SW)
      Engine switch on (IG) OFF
      Engine started ON
      Result
      Result Proceed to
      OK (w/ stop and start system) A
      OK (w/o stop and start system) B
      NG (w/ stop and start system) C
      NG (w/o stop and start system) D

    B

    INSPECT ST RELAY Click here

    C

    GO TO STOP AND START SYSTEM (STARTER SIGNAL CIRCUIT) Click here

    D

    INSPECT PARK/NEUTRAL POSITION SWITCH ASSEMBLY Click here

    A

  3. CHECK HARNESS AND CONNECTOR (ECM - STOP AND START ECU - ST NO. 2 RELAY)


    1. Disconnect the ECM connector.

    2. Disconnect the engine stop and start ECM connector.

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

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A35-29 (STA) - A38-23 (STA2) Always Below 1 Ω
      A36-29 (STA) or A38-23 (STA2) or 2 (ST NO. 2 relay)- Body ground and other terminals Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. Disconnect the ECM connector.

    2. Disconnect the engine stop and start ECM connector.

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

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

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A35-57 (NSW) - A38-28 (CLL) Always Below 1 Ω
      A35-57 (NSW) or A38-28 (CLL) or C14-4 (B) - Body ground and other terminals Always 10 kΩ or higher
      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

  5. INSPECT ST RELAY


    1. Inspect the ST relay.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE ST RELAY

    OK

  6. INSPECT STARTER ASSEMBLY


    1. Inspect the starter assembly.

      for 1.3 kW type: Click here

      for 1.7 kW type: Click here

      w/ stop and start system: Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE STARTER ASSEMBLY for 1.3 kW type: Click here
    REPLACE STARTER ASSEMBLY for 1.7 kW type: Click here
    REPLACE STARTER ASSEMBLY w/ stop and start system: Click here

    OK

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


    1. Remove the ST relay from the No. 1 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 relay) - C50-1 (ST) Always Below 1 Ω
      3 (ST relay) or C50-1 (ST) - Body ground and other terminals Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  8. CHECK HARNESS AND CONNECTOR (BATTERY - 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
      D2-1 (B) - Body ground Always 11 to 14 V
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. Remove the ST relay from the No. 1 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 relay) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


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

    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
      C14-9 (L) - 2 (ST relay) Always Below 1 Ω
      I51-12 (STA) - 2 (ST relay) Always Below 1 Ω
      C14-9 (L) or I51-12 (STA) or 2 (ST relay) - Body ground and other terminals Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. B005B2LC01
      *1 No. 1 Engine Room Relay Block and Junction Block Assembly
      *2 ST Relay

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

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

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

    OK

    GO TO ENTRY AND START SYSTEM Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  12. INSPECT PARK/NEUTRAL POSITION SWITCH ASSEMBLY


    1. Inspect the park/neutral position switch assembly.

      for 2WD: Click here

      for AWD: Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE PARK/NEUTRAL POSITION SWITCH ASSEMBLY for 2WD: Click here
    REPLACE PARK/NEUTRAL POSITION SWITCH ASSEMBLY for AWD: Click here

    OK

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


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

    2. Disconnect the ECM connector.

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

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

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      C14-9 (L) - A35-29 (STA) Always Below 1 Ω
      C14-9 (L) or A35-29 (STA) or 2 (ST relay) or I51-12 (STA) - Body ground and other terminals Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


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

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

    3. Disconnect the ECM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      I51-10 (STAR) - C14-4 (B) Always Below 1 Ω
      I51-10 (STAR) - A35-57 (NSW) Always Below 1 Ω
      I51-10 (STAR) or C14-4 (B) or A35-57 (NSW) - Body ground and other terminals Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    GO TO ENTRY AND START SYSTEM Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  15. READ VALUE USING GTS (STARTER SW)


    1. Connect the GTS to DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

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


      Powertrain > Engine > Data List
      Tester Display
      Starter SW

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

      OK
      Condition GTS Display (Starter SW)
      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)