SFI SYSTEM (w/ Secondary Air Injection System) Starter Signal Circuit

DESCRIPTION

for A/T:

While the engine is being cranked, current flows from terminal ST1 of the ignition switch to the park/neutral position switch and to terminal STA of the ECM (STA Signal).

for M/T:

While the engine is being cranked, current flows from terminal ST1 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
      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 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 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
      B71-48 (STA) - D37-5 Always Below 1 Ω
      H25-1 (ST1) or D37-4 - Body ground Always 10 kΩ or higher
      B71-48 (STA) or D37-5 - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. INSPECT IGNITION SWITCH


    1. Inspect the ignition switch Click here.


    NG

    REPLACE IGNITION SWITCH

    OK

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

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


    1. Disconnect the ignition switch connector.

    2. Disconnect the ECM connector.

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

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H25-1 (ST1) - B71-48 (STA) Always Below 1 Ω
      H25-1 (ST1) or B71-48 (STA) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. INSPECT IGNITION SWITCH


    1. Inspect the ignition switch Click here.


    NG

    REPLACE IGNITION SWITCH

    OK

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