CAN COMMUNICATION SYSTEM(for RHD) ECM Communication Stop Mode

DESCRIPTION

Detection Item Symptoms 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 of ECM

  • ECM

WIRING DIAGRAM

A000UJIE01
*a EFI MAIN
*b from Auxiliary Battery
*c from EFI MAIN2 Relay
*d from IG2 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. Disconnect the ECM connectors.

      A000VFEE03
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to ECM)

      		 - -

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A14-7 (BATT) - Body ground Always 11 to 14 V
      A14-8 (IGSW) - Body ground Power switch on (IG) 11 to 14 V
      A13-1 (+B2) - Body ground Power switch on (IG) 11 to 14 V
      A13-2 (+B) - Body ground Power switch on (IG) 11 to 14 V

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A14-1 (EC) - Body ground Always Below 1 Ω
      E2-5 (ME01) - Body ground Always Below 1 Ω
      E3-1 (E1) - Body ground Always Below 1 Ω
      E2-2 (E01) - Body ground Always Below 1 Ω
      E2-1 (E02) - Body ground Always Below 1 Ω
      E3-4 (E04) - Body ground Always Below 1 Ω
      E4-1 (E05) - Body ground Always Below 1 Ω

    OK

    REPLACE ECM Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR