LEMON Manuals: Even more car manuals for everyone
Home >> Toyota >> 2021 >> Avalon TRD >> Repair and Diagnosis >> Accessories & Equipment >> Communication Devices >> Can Communication System - Diagnostic Codes & Circuit Tests (Except Hybrid) (1 Of 2) >> CAN COMMUNICATION SYSTEM (for Gasoline Model) >> Symptom Tests >> ECM Communication Stop Mode [04/2018 - 08/2020] >> Procedure

ECM Communication Stop Mode [04/2018 - 08/2020]: Procedure

  1. CHECK FOR OPEN IN CAN BUS LINES (ECM MAIN LINE) 
    1. Disconnect the cable from the negative (-) battery terminal.
    2. Disconnect the A18 ECM connector.
    3. Measure the resistance according to the value(s) in the table below.
      GTY874013Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to ECM)

      Standard Resistance

      Tester Connection Condition Specified Condition
      A18-13 (CANH) - A18-26 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω

      Result

      Result 
      OK
      NG

    Result: 

    NG 

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

    Result: 

    OK 

    See step  2

  2. CHECK ECM POWER SOURCE CIRCUIT 
    1. Check the ECM power source circuit.

      Refer to ECM Power Source Circuit [04/2018 -]

      Result

      Result
      OK
      NG

    Result: 

    OK 

    REPLACE ECM. Refer to  REMOVAL [04/2018 - 08/2021] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT) 

scientia non olet · About LEMON Manuals