CAN COMMUNICATION SYSTEM (for RHD with Entry and Start System) ECM Communication Stop Mode

DESCRIPTION

Detection Item Symptom Trouble Area
ECM Communication Stop Mode

Either condition is met:


  • "ECM (Engine)" is not displayed on "Bus Check".


  • "ECM Communication Stop Mode" in "DTC Combination Table" applies.


  • Power source or inside ECM

  • ECM

WIRING DIAGRAM

A00O9GYE01
A00O9GYE03

INSPECTION PROCEDURE

Note

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

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (ECM - BATTERY AND BODY GROUND)


    1. for 1GR-FE:


      1. Connect the cable to the negative (-) battery terminal.

        A00OAKGE04
        Text in Illustration
        *a

        Front view of wire harness connector

        (to ECM)

        - -
      2. Disconnect the C36, C37 and G55 ECM connectors.

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        C36-12 (E1) - Body ground Always Below 1 Ω
        C37-14 (E01) - Body ground Always Below 1 Ω
        C37-15 (E02) - Body ground Always Below 1 Ω
        C37-10 (ME01) - Body ground Always Below 1 Ω
        G55-12 (EC) - Body ground Always Below 1 Ω
      4. Measure the voltage according to the value(s) in the table below.

        Standard Voltage
        Tester Connection Condition Specified Condition
        G55-24 (BATT) - Body ground Always 11 to 14 V
        G55-23 (+B2) - Body ground Battery positive (+) voltage applied to terminal G55-9 (MREL) 11 to 14 V
        G55-22 (+B) - Body ground Battery positive (+) voltage applied to terminal G55-9 (MREL) 11 to 14 V
    2. for 1KD-FTV:


      1. Connect the cable to the negative (-) battery terminal.

        A00OAKGE05
        Text in Illustration
        *a

        Front view of wire harness connector

        (to ECM)

        - -
      2. Disconnect the G57, G58 and C93 ECM connectors.

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        C93-1 (E1) - Body ground Always Below 1 Ω
        C93-12 (E01) - Body ground Always Below 1 Ω
        C93-13 (E02) - Body ground Always Below 1 Ω
        C93-8 (ME01) - Body ground Always Below 1 Ω
        G57-11 (EC) - Body ground Always Below 1 Ω
      4. Measure the voltage according to the value(s) in the table below.

        Standard Voltage
        Tester Connection Condition Specified Condition
        G57-23 (BATT) - Body ground Always 11 to 14 V
        G57-17 (+B2) - Body ground Battery positive (+) voltage applied to terminal G58-11 (MREL) 11 to 14 V
        G57-24 (+B) - Body ground Battery positive (+) voltage applied to terminal G58-11 (MREL) 11 to 14 V
      Result
      Result Proceed to
      OK (for 1GR-FE) A
      OK (for 1KD-FTV) B
      NG C

    B
    C
    A