SFI SYSTEM Starter Signal Circuit

DTC Code DTC Name
Starter Signal Circuit

DESCRIPTION

While the engine is being cranked, current flows from terminal ST2 of the ignition switch assembly*1 or terminal STAR of the certification ECU (smart key ECU assembly)*2 to the park/neutral position switch assembly and to terminal STA of the ECM (STA signal).

  • *1: w/o Entry and Start System

  • *2: w/ Entry and Start System

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 ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Engine and ECT / Data List / All Data / Starter Signal.

      Powertrain > Engine and ECT > Data List

      Tester Display

      Starter Signal

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

      OK

      Switch Position

      Starter Signal

      ON

      OFF

      START

      ON

    Result

    Result

    Proceed to

    NG

    (for CVT models)

    A

    NG

    (for Manual Transaxle Models)

    B

    OK

    C
    B

    INSPECT CLUTCH START SWITCH ASSEMBLYClick here

    C

    GO TO STOP AND START SYSTEM (STARTER SIGNAL CIRCUIT)

    Click here

    A

  3. CHECK HARNESS AND CONNECTOR (ECM - ENGINE 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

      A62-29 (STA) - A66-23 (STA2)

      Always

      Below 1 Ω

      A62-29 (STA), A66-23 (STA2) or 2 (ST NO. 2 relay) - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK HARNESS AND CONNECTOR (ECM - ENGINE STOP AND START ECU - PARK/NEUTRAL POSITION SWITCH 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

      A62-23 (NSW) - A66-17 (CLL)

      Always

      Below 1 Ω

      A62-23 (NSW), A66-17 (CLL) or B36-4 (B) - Body ground and other terminals

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    OK

    GO TO STOP AND START SYSTEM (STARTER SIGNAL CIRCUIT)

    Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  5. INSPECT CLUTCH START SWITCH ASSEMBLY

    1. Inspect the clutch start switch assembly.

      Click here

    Result

    Result

    Proceed to

    OK (w/ Entry and Start System)

    A

    OK (w/o Entry and Start System)

    B

    NG

    C
    B

    INSPECT IGNITION SWITCH ASSEMBLYClick here

    C

    REPLACE CLUTCH START SWITCH ASSEMBLY

    Click here

    A

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

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

    2. Disconnect the clutch start switch assembly connector.

    3. Disconnect the engine stop and start ECM connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      G82-5 (STAR) - A4-2

      Always

      Below 1 Ω

      G82-5 (STAR) - A66-17 (CLL)

      Always

      Below 1 Ω

      A66-17 (CLL) - A4-2

      Always

      Below 1 Ω

      G82-5 (STAR) or A4-2 - Body ground

      Always

      10 kΩ or higher

      G82-5 (STAR) or A66-17 (CLL) - Body ground

      Always

      10 kΩ or higher

      A66-17 (CLL) or A4-2 - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  7. CHECK HARNESS AND CONNECTOR (CLUTCH START SWITCH ASSEMBLY - ST NO.1 RELAY - ECM - CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - ENGINE STOP AND START)

    1. Disconnect the clutch start switch assembly connector.

    2. Remove the ST NO.1 relay from the No. 2 engine room relay block and junction block assembly.

    3. Disconnect the ECM connector.

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

    5. Disconnect the engine stop and start ECM connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      A4-1 - A62-29 (STA)

      Always

      Below 1 Ω

      A4-1, 2 (ST NO.1 relay), A62-29 (STA), G82-7 (STA) or A66-21 (STA) - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    OK

    GO TO STOP AND START SYSTEM (STARTER SIGNAL CIRCUIT)

    Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  8. INSPECT IGNITION SWITCH ASSEMBLY

    1. Inspect the ignition switch assembly.

      Click here

    Result

    Proceed to

    OK

    NG
    NG

    REPLACE IGNITION SWITCH ASSEMBLY

    Click here

    OK

  9. CHECK HARNESS AND CONNECTOR (IGNITION SWITCH ASSEMBLY - CLUTCH START SWITCH ASSEMBLY - ENGINE STOP AND START ECM)

    1. Disconnect the ignition switch assembly connector.

    2. Disconnect the clutch start switch assembly connector.

    3. Disconnect the engine stop and start ECM connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      G4-2 (ST2) - A4-2

      Always

      Below 1 Ω

      G4-2 (ST2) - A66-17 (CLL)

      Always

      Below 1 Ω

      A66-17 (CLL) - A4-2

      Always

      Below 1 Ω

      G4-2 (ST2) or A4-2 - Body ground

      Always

      10 kΩ or higher

      G4-2 (ST2) or A66-17 (CLL) - Body ground

      Always

      10 kΩ or higher

      A66-2 (ST2) or A4-2 - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  10. CHECK HARNESS AND CONNECTOR (CLUTCH START SWITCH ASSEMBLY - ST NO.1 RELAY - ECM - ENGINE STOP AND START ECM)

    1. Disconnect the clutch start switch assembly connector.

    2. Remove the ST NO.1 relay from the No. 2 engine room relay block and junction block assembly.

    3. Disconnect the ECM connector.

    4. Disconnect the engine stop and start ECM connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      A4-1 - A62-29 (STA)

      Always

      Below 1 Ω

      A4-1, 2 (ST NO.1 relay), A62-29 (STA) or A66-21 (STA) - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    OK

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

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  11. READ VALUE USING GTS (STARTER SIGNAL)

    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Engine and ECT / Data List / All Data / Starter Signal.

      Powertrain > Engine and ECT > Data List

      Tester Display

      Starter Signal

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

      OK

      Switch Position

      Starter Signal

      ON

      OFF

      START

      ON

    Result

    Result

    Proceed to

    OK

    A

    NG (w/ Stop and Start system)

    B

    NG (w/o Stop and Start system)

    C
    A

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

    Click here

    B

    REPAIR OR REPLACE HARNESS OR CONNECTOR (ST NO.2 RELAY - ECM)

    C

    REPAIR OR REPLACE HARNESS OR CONNECTOR (ST NO.1 RELAY - ECM)