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

A01DQ1CE02

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. Disconnect the C93, G57 and G58 ECM connectors.

      A01DOJ4E01
      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
      C93-8 (ME01) - Body ground Always Below 1 Ω
      C93-12 (E01) - Body ground Always Below 1 Ω
      C93-13 (E02) - 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
      G57-24 (+B) - Body ground Battery positive (+) voltage applied to terminal G58-11 (MREL) 11 to 14 V
      G57-17 (+B2) - Body ground Battery positive (+) voltage applied to terminal G58-11 (MREL) 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE ECM Click here