ECD 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 clutch start 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

A284209E01
A284210E01

CAUTION / NOTICE / HINT

Note:

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

  • After replacing the ECM, the new ECM needs registration (Click here) and initialization (Click here).

PROCEDURE

  1. CHECK WHETHER ENGINE CAN BE CRANKED

    1. Check if the engine can be cranked.

      Result

      Proceed to

      Engine cannot be cranked

      Engine can be cranked
    Engine can be cranked

    READ VALUE USING GTS (STARTER SIGNAL)Click here

    Engine cannot be cranked

  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 / Data List / All Data / Starter Signal.

      Powertrain > Engine > 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

    Proceed to

    OK

    NG
    NG

    INSPECT PARK/NEUTRAL POSITION SWITCH ASSEMBLYClick 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 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) - B6-1

      Always

      Below 1 Ω

      3 (ST relay) or B6-1 - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. 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

      C4-1 - Body ground

      Always

      11 to 14 V

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  7. CHECK TERMINAL VOLTAGE (POWER SOURCE OF ST RELAY)

    1. A296486C03

      *1

      Engine Room NO. 2 Relay Block and Junction Block Assembly

      *2

      ST Relay

      Remove the ST relay from the engine room NO. 2 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
    NG

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

    OK

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

    1. Remove the ST relay from the engine room NO. 2 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

  9. CHECK HARNESS AND CONNECTOR (ST RELAY - PARK/NEUTRAL POSITION SWITCH ASSEMBLY)

    1. Remove the ST relay from the engine room NO. 2 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 relay) - B36-9 (L)

      Always

      Below 1 Ω

      2 (ST relay) or B36-9 (L) - Body ground

      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

  10. INSPECT PARK/NEUTRAL POSITION SWITCH ASSEMBLY

    1. Inspect the park/neutral position switch assembly.

      Click here

    Result

    Proceed to

    OK (w/ entry and start system)

    OK (w/o entry and start system)

    NG
    OK (w/o entry and start system)

    INSPECT IGNITION OR STARTER SWITCH ASSEMBLYClick here

    NG

    REPLACE PARK/NEUTRAL POSITION SWITCH ASSEMBLY

    Click here

    OK (w/ entry and start system)

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

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

    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

      G82-5 (STAR) - B36-4 (B)

      Always

      Below 1 Ω

      G82-5 (STAR) or B36-4 (B) - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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

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

    2. Remove the ST 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

      B36-9 (L) - A61-43 (STA)

      Always

      Below 1 Ω

      B36-9 (L) or A61-43 (STA) - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    OK

    GO TO ENTRY AND START SYSTEM

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  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 - PARK/NEUTRAL POSITION SWITCH ASSEMBLY)

    1. Disconnect the ignition or starter switch assembly connector.

    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

      G4-2 (ST2) - B36-4 (B)

      Always

      Below 1 Ω

      G4-2 (ST2) or B36-4 (B) - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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

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

    2. Remove the ST relay from the engine room NO. 2 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

      B36-9 (L) - A61-43 (STA)

      Always

      Below 1 Ω

      B36-9 (L) or A61-43 (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

  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 / Data List / All Data / Starter Signal.

      Powertrain > Engine > 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

    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)