ECD SYSTEM (w/o EGR Cooler) Starter Signal Circuit

DESCRIPTION

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

WIRING DIAGRAM

A01DZJSE01

INSPECTION PROCEDURE

Tech Tips

This chart 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.

Note

If the ECM is replaced, the new ECM needs initialization Click here.

PROCEDURE


  1. READ VALUE OF INTELLIGENT TESTER (STARTER SIGNAL)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch ON and turn the intelligent tester ON.

    3. Enter the following menus: Powertrain / Engine / Data List / Starter Signal.

    4. Read the values.

      Standard
      Ignition Switch Position Starter SIG
      ON OFF
      START ON

    OK

    PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

    NG

  2. CHECK WIRE HARNESS (ECM - STARTER RELAY (Marking: ST))


    1. A01DYBWE03

      Disconnect the E5 ECM connector.

    2. A/T:

      Remove the starter relay from the engine room relay block.

    3. M/T:

      Disconnect the 2O junction block connector.

    4. Measure the resistance of the wire harness side connectors.

      Standard resistance
      A/T
      Tester Connection Specified Condition
      Relay block starter relay terminal 2 - E5-7 (STA) Below 1 Ω
      Relay block starter relay terminal 2 or E5-7 (STA) - Body ground 10 kΩ or higher
      Standard resistance
      M/T
      Tester Connection Specified Condition
      2O-19 - E5-7 (STA) Below 1 Ω
      2O-19 - E5-7 (STA) - Body ground 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS AND CONNECTOR

    OK

    REPLACE ECM