SFI SYSTEM Starter Signal Circuit

DESCRIPTION

While the engine is being cranked, current flows from terminal ST2 of the ignition switch directly to terminal STA of the ECM (STA signal).

WIRING DIAGRAM

Refer to DTC P0617 Click here.

INSPECTION PROCEDURE

Note

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

Tech Tips

This inspection procedure is based on the premise that the engine can crank normally. If the engine cannot crank normally, proceed to the problem symptoms table Click here.

PROCEDURE


  1. READ VALUE USING INTELLIGENT TESTER (STARTER SIGNAL)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the intelligent tester on.

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

    5. Read the value.

      OK
      Ignition Switch Position Starter Signal
      ON OFF
      START ON

    NG

    INSPECT PARK/NEUTRAL POSITION SWITCH ASSEMBLY Click here

    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

  2. INSPECT PARK/NEUTRAL POSITION SWITCH ASSEMBLY


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


    NG

    REPLACE PARK/NEUTRAL POSITION SWITCH ASSEMBLY

    OK

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


    1. Disconnect the ignition switch connector.

    2. Disconnect the ECM connector.

    3. 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
      B9-12 (ST1) - D37-5 Always Below 1 Ω
      H25-1 (ST1) or D37-4 - Body ground Always 10 kΩ or higher
      B9-12 (ST1) or D37-5 - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (PARK/NEUTRAL POSITION SWITCH ASSEMBLY - ECM, IGNITION SWITCH)

    OK

  4. INSPECT IGNITION SWITCH ASSEMBLY


    1. Inspect the ignition switch assembly Click here.


    NG

    REPLACE IGNITION SWITCH ASSEMBLY

    OK

  5. INSPECT STARTER (ST) RELAY


    1. Inspect the starter (ST) relay Click here.


    NG

    REPLACE STARTER (ST) RELAY

    OK

  6. CHECK HARNESS AND CONNECTOR


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

    2. Disconnect the ignition switch connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      Starter (ST) relay terminal 5 - H25-8 (ST2) Always Below 1 Ω
      Starter (ST) relay terminal 3 - E2-1 Always Below 1 Ω
      Starter (ST) relay terminal 1 - B9-12 (STA) Always Below 1 Ω
      Starter (ST) relay terminal 2 - Body ground Always Below 1 Ω
      Starter (ST) relay terminal 5 or H25-8 (ST2) - Body ground Always 10 kΩ or higher
      Starter (ST) relay terminal 3 or E2-1 - Body ground Always 10 kΩ or higher
      Starter (ST) relay terminal 1 or B9-12 (STA) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here