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 or starter 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 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 result when the ignition switch is ON and engine starts.

      OK

      Condition

      Starter Signal

      Ignition Switch ON

      OFF

      Engine Started

      ON

    Result

    Result

    Proceed to

    NG

    A

    OK

    B
    B

    INSPECT ST NO. 1 RELAYClick here

    A

  3. INSPECT PARK/NEUTRAL POSITION SWITCH ASSEMBLY

    1. Inspect the park/neutral position 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 OR STARTER SWITCH ASSEMBLYClick here

    C

    REPLACE PARK/NEUTRAL POSITION SWITCH ASSEMBLY

    Click hereClick here

    A

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

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

    2. Disconnect the park/neutral position switch 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

      E33-5 (STAR) - B110-4 (B)

      Always

      Below 1 Ω

      E33-5 (STAR) - B31-63 (NSW)

      Always

      Below 1 Ω

      E33-5 (STAR), B110-4 (B) or B31-63 (NSW) - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. CHECK HARNESS AND CONNECTOR (PARK/NEUTRAL POSITION SWITCH ASSEMBLY - ST NO. 1 RELAY - ECM - CERTIFICATION ECU (SMART KEY ECU ASSEMBLY))

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

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

    3. Disconnect the ECM 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

      B110-9 (L) - A50-22 (STA)

      Always

      Below 1 Ω

      B110-9 (L), 2 (ST NO. 1 relay), A50-22 (STA) or E33-7 (STA) - Body ground

      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

  6. 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

  7. CHECK HARNESS AND CONNECTOR (IGNITION OR STARTER SWITCH ASSEMBLY - PARK/NEUTRAL POSITION SWITCH ASSEMBLY - ECM)

    1. Disconnect the ignition or starter switch assembly connector.

    2. Disconnect the park/neutral position switch 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

      E4-2 (ST2) - B110-4 (B)

      Always

      Below 1 Ω

      E4-2 (ST2) - B31-63 (NSW)

      Always

      Below 1 Ω

      E4-2 (ST2), B110-4 (B) or B31-63 (NSW) - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  8. CHECK HARNESS AND CONNECTOR (PARK/NEUTRAL POSITION SWITCH ASSEMBLY - ST NO. 1 RELAY - ECM)

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

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

    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

      B110-9 (L) - A50-22 (STA)

      Always

      Below 1 Ω

      B110-9 (L), 2 (ST NO. 1 relay) or A50-22 (STA) - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    OK

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

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  9. INSPECT ST NO. 1 RELAY

    1. Inspect the ST NO. 1 relay.

      Click here

    Result

    Proceed to

    OK

    NG
    NG

    REPLACE ST NO. 1 RELAY

    OK

  10. INSPECT STARTER ASSEMBLY

    1. Inspect the starter assembly.

      Click here

    Result

    Proceed to

    OK

    NG
    NG

    REPLACE STARTER ASSEMBLY

    Click here

    OK

  11. CHECK HARNESS AND CONNECTOR (ST NO. 1 RELAY - STARTER ASSEMBLY)

    1. Remove the ST NO. 1 relay from the 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 NO. 1 relay) - B8-1

      Always

      Below 1 Ω

      3 (ST NO. 1 relay) or B8-1 - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  12. CHECK TERMINAL VOLTAGE (POWER SOURCE OF 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

      B4-1 - Body ground

      Always

      11 to 14 V

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  13. CHECK TERMINAL VOLTAGE (POWER SOURCE OF ST NO. 1 RELAY)

    1. A296679C01

      *1

      Engine Room Relay Block and Junction Block Assembly

      *2

      ST NO. 1 Relay

      Remove the ST NO. 1 relay from the 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 NO. 1 relay) - Body ground

      Always

      11 to 14 V

    Result

    Proceed to

    OK

    NG
    NG

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

    OK

  14. CHECK HARNESS AND CONNECTOR (ST NO. 1 RELAY - BODY GROUND)

    1. Remove the ST NO. 1 relay from the 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 NO. 1 relay) - Body ground

      Always

      Below 1 Ω

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  15. CHECK HARNESS AND CONNECTOR (ST NO. 1 RELAY - PARK/NEUTRAL POSITION SWITCH ASSEMBLY)

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

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

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      2 (ST NO. 1 relay) - B110-9 (L)

      Always

      Below 1 Ω

    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

  16. 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 result when the ignition switch is ON and engine starts.

      OK

      Condition

      Starter Signal

      Ignition Switch ON

      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 NO. 1 RELAY - ECM)