CAN COMMUNICATION SYSTEM(for RHD without 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

A01XCU0E01
for 1KD-FTV
*a from Battery
*b from EFI Relay
*c to EFI Relay
A01XHJZE02
for 5L-E
*a from Battery
*b from EFI Relay
*c to EFI Relay

CAUTION / NOTICE / HINT

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 1KD-FTV:


      1. Disconnect the C93, G57 and G58 ECM connectors.

        B001FNFE02
        Text in Illustration
        *a

        Front view of wire harness connector

        (to ECM)

        		 - -

      2. 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

      3. 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

    2. for 5L-E:


      1. Disconnect the C161 and C183 ECM connectors.

        A01XGUAE01
        Text in Illustration
        *a

        Front view of wire harness connector

        (to ECM)

        		 - -

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        C161-5 (E1) - Body ground Always Below 1 Ω
        C161-7 (E01) - Body ground Always Below 1 Ω
        C161-6 (E02) - Body ground Always Below 1 Ω
        G183-7 (EC) - Body ground Always Below 1 Ω

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

        Standard Voltage
        Tester Connection Condition Specified Condition
        G183-2 (BATT) - Body ground Always 11 to 14 V
        G183-1 (+B) - Body ground Battery positive (+) voltage applied to terminal G183-10 (MREL) 11 to 14 V
      Result
      Result Proceed to
      OK (for 1KD-FTV) A
      OK (for 5L-E) B
      NG C

    A

    REPLACE ECM Click here

    B

    REPLACE ECM Click here

    C

    REPAIR OR REPLACE HARNESS OR CONNECTOR