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Home >> Toyota >> 2020 >> RAV4 XLE, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 43 (Can Communication System (HV) - Circuit Tests (1 Of 6) & Diagnostic Codes) >> CAN COMMUNICATION SYSTEM (for HV Model) >> ECM Communication Stop Mode [11/2018 - 02/2019] >> Procedure

ECM Communication Stop Mode [11/2018 - 02/2019]: Procedure

WARNING: This page is about a different variant/trim than selected.
  1. CHECK FOR OPEN IN CAN BUS WIRE (ECM MAIN WIRE AND BRANCH WIRE) 
    1. Disconnect the cable from the negative (-) auxiliary battery terminal.
    2. Disconnect the ECM connector.
      GTY839412Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to ECM)
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      A24-8 (CANH) - A24-18 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω
      A24-7 (CAN+) - A24-17 (CAN-) Cable disconnected from negative (-) auxiliary battery terminal 54 to 69 Ω

      Result

      Result Proceed to
      OK A
      NG (No. 3 CAN junction connector main wire) B
      NG (No. 4 CAN junction connector branch wire) C

    Result: 

    B 

    REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR 

    Result: 

    C 

    REPAIR OR REPLACE CAN BRANCH WIRE OR CONNECTOR 

    Result: 

    A 

    See step  2

  2. CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT) 
    1. Measure the resistance according to the value(s) in the table below.
      GTY839393Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to ECM)

      Standard Resistance

      Tester Connection Condition Specified Condition
      A24-45 (EC) - Body ground Cable disconnected from negative (-) auxiliary battery terminal Below 1 Ω
      A24-10 (E1) - Body ground Cable disconnected from negative (-) auxiliary battery terminal Below 1 Ω
      A24-36 (E2) - Body ground Cable disconnected from negative (-) auxiliary battery terminal Below 1 Ω
      A24-54 (E1D1) - Body ground Cable disconnected from negative (-) auxiliary battery terminal Below 1 Ω
    2. Reconnect the cable to the negative (-) auxiliary battery terminal.
      NOTE:

      When disconnecting the cable, some systems need to be initialized after the cable is reconnected.

      Refer to INITIALIZATION [11/2018 - 02/2019]

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

      Standard Voltage

      Tester Connection Condition Specified Condition
      A24-1 (BATT) - Body ground Power switch off 11 to 14 V
      A24-9 (+B) - Body ground Terminal A24-15 (MREL) connected to body ground 11 to 14 V
      A24-35 (+B2) - Body ground Terminal A24-15 (MREL) connected to body ground 11 to 14 V
      A24-2 (IGSW) - Body ground Power switch on (IG) 11 to 14 V
      Power switch off Below 1 V

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE ECM 

    Refer to REMOVAL [11/2018 - 02/2019]

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

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