SFI SYSTEM Starter Signal Circuit

DESCRIPTION

While the engine is being cranked, current flows from terminal ST1 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.

CAUTION / NOTICE / HINT

Note

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

Tech Tips

This chart is based on the premise that the engine can be cranked normally. If the engine does not 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 tester on.

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

    5. Read the value displayed on the tester when the ignition switch is ON and when the engine is started.

      OK
      Ignition Switch Position Starter Signal
      ON OFF
      START ON
      Result
      Result Proceed to
      OK A
      NG B

    A
    B
  2. CHECK HARNESS AND CONNECTOR (ECM - PARK/NEUTRAL POSITION SWITCH)


    1. Disconnect the ECM connector.

    2. Disconnect the park/neutral position switch connector.

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

      Standard Resistance (Check for Open)
      Tester Connection Condition Specified Condition
      B14-5 - A40-48 (STA) Always Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      B14-5 or A40-48 (STA) - Body ground Always 10 kΩ or higher
    4. Reconnect the ECM connector.

    5. Reconnect the park/neutral position switch connector.


    OK
    NG