ECD SYSTEM Starter Signal Circuit

DESCRIPTION

While the engine is being cranked, current flows from terminal ST2 of the ignition switch to the park/neutral position switch and also flows to terminal STA of the ECM (STA Signal).

WIRING DIAGRAM

Refer to DTC P0617 Click here.

INSPECTION PROCEDURE

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.

Tech Tips

This chart is based on the premise that the engine can crank normally. If the engine cannot crank normally, proceed to Problem Symptoms Table Click here.

PROCEDURE


  1. 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 / Starter Signal.

    5. Read the value.

      OK
      Ignition Switch Condition Starter Signal
      ON OFF
      START ON
      Result
      Result Proceed to
      OK A
      NG (for A/T) B
      NG (for M/T) C

    B

    INSPECT PARK/NEUTRAL POSITION SWITCH ASSEMBLY Click here

    C

    CHECK HARNESS AND CONNECTOR (IGNITION SWITCH - ECM) Click here

    A

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

  2. INSPECT PARK/NEUTRAL POSITION SWITCH ASSEMBLY


    1. Inspect the park/neutral position switch assembly Click here.


    NG

    REPLACE PARK/NEUTRAL POSITION SWITCH ASSEMBLY Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (PARK/NEUTRAL POSITION SWITCH ASSEMBLY - ECM, IGNITION SWITCH)


    1. Disconnect the ignition switch connector.

    2. Disconnect the ECM connector.

    3. Disconnect the park/neutral position switch connector.

    4. Remove the starter (ST) relay from the instrument panel relay block.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H25-1 (ST1) - D37-4 Always Below 1 Ω
      B88-36 (STA) - D37-5 Always Below 1 Ω
      H25-1 (ST1) or D37-4 - Body ground Always 10 kΩ or higher
      B88-36 (STA) or D37-5 - Body ground Always 10 kΩ or higher

    6. Reconnect the ignition switch connector.

    7. Reconnect the ECM connector.

    8. Reconnect the park/neutral position switch connector.

    9. Reinstall the starter relay (ST).


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. INSPECT IGNITION SWITCH ASSEMBLY


    1. Inspect the ignition switch Click here.


    NG

    REPLACE IGNITION SWITCH ASSEMBLY

    OK

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  5. CHECK HARNESS AND CONNECTOR (IGNITION SWITCH - ECM)


    1. Remove the starter (ST) relay from the instrument panel relay block.

    2. Disconnect the ECM connector.

    3. Disconnect the ignition switch connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H25-1 (ST1) - B88-36 (STA) Always Below 1 Ω
      H25-1 (ST1) or B88-36 (STA) - Body ground Always 10 kΩ or higher

    5. Reinstall the starter relay (ST).

    6. Reconnect the ECM connector.

    7. Reconnect the ignition switch connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. INSPECT IGNITION SWITCH ASSEMBLY


    1. Inspect the ignition switch Click here.


    NG

    REPLACE IGNITION ASSEMBLY

    OK

    REPAIR OR REPLACE HARNESS OR CONNECTOR