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Home >> Lexus >> 2017 >> ES 300h >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Communication Devices >> Can Communication System (W/O Central Gateway Ecu) (Diagnostic Codes & Symptom Tests) >> Can Communication System (W/O Central Gateway Ecu) >> ECM Communication Stop Mode (2016 - 2017) >> Procedure

ECM Communication Stop Mode (2016 - 2017): Procedure

  1. CHECK FOR OPEN IN CAN BUS LINES (ECM MAIN LINE) 
    1. Disconnect the cable from the negative (-) auxiliary battery terminal.
    2. Disconnect the A22 ECM connector.
      GTY633036Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      A22-13 (CANH) - A22-26 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω
      TEXT IN ILLUSTRATION

      *a Front view of wire harness connector
      (to ECM)

    Result:  NG

    NG 

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (ECM MAIN LINE) 

    Result:  OK

    See step  2

  2. CHECK ECM POWER SOURCE CIRCUIT 
    1. Check the ECM power source circuit (Refer to ECM Power Source Circuit (2016 - 2017) ).

    Result:  OK

    OK 

    REPLACE ECM 

    (Refer to REMOVAL (2016 - 2017) )

    Result:  NG

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT) 

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