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Home >> Toyota >> 2024 >> Corolla LE >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 81 (Can Communication System (HEV) - Circuit Tests (2 Of 6)) >> CAN COMMUNICATION SYSTEM (for HV Model) >> Open in Bus 2 Main Bus Line [04/2020 - 09/2022] >> Procedure

Open in Bus 2 Main Bus Line [04/2020 - 09/2022]: Procedure

WARNING: This page is about a different variant/trim than selected.
  1. CHECK FOR OPEN IN CAN MAIN BUS LINES (NO. 2 CAN JUNCTION CONNECTOR) 
    1. Disconnect the cable from the negative (-) auxiliary battery terminal.
    2. Disconnect the I146 No. 2 CAN junction connector.
    3. Measure the resistance according to the value(s) in the table below.
      GTY973771Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to No. 2 CAN Junction Connector)      		 *b to Central gateway ECU (network gateway ECU)
      *c to ECM - -

      Standard Resistance

      Tester Connection Condition Specified Condition Connected to
      I146-1 (CANH) - I146-11 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω Central gateway ECU (network gateway ECU)
      I146-4 (CANH) - I146-14 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω ECM

      Result

      Result Proceed to
      OK A
      NG (Line to central gateway ECU (network gateway ECU)) B
      NG (Line to ECM) C

    Result: 

    A 

    REPLACE NO. 2 CAN JUNCTION CONNECTOR 

    Result: 

    C 

    See step  3

    Result: 

    B 

    See step  2

  2. CHECK FOR OPEN IN CAN MAIN BUS LINES (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) - NO. 2 CAN JUNCTION CONNECTOR) 
    1. Reconnect the I146 No. 2 CAN junction connector.
    2. Disconnect the I53 central gateway ECU (network gateway ECU) connector.
    3. Measure the resistance according to the value(s) in the table below.
      GTY852940Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Central Gateway ECU (Network Gateway ECU))

      Standard Resistance

      Tester Connection Condition Specified Condition
      I53-18 (CA4H) - I53-17 (CA4L) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω

      Result

      Result
      OK
      NG

    Result: 

    OK 

    REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) 

    Refer to REMOVAL [06/2018 - 09/2022]

    Result: 

    NG 

    REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) - NO. 2 CAN JUNCTION CONNECTOR) 

  3. CHECK FOR OPEN IN CAN MAIN BUS LINES (ECM - NO. 2 CAN JUNCTION CONNECTOR) 
    1. Reconnect the I146 No. 2 CAN junction connector.
    2. Disconnect the A46 ECM connector.
    3. Measure the resistance according to the value(s) in the table below.
      GTY926317Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to ECM)

      Standard Resistance

      Tester Connection Condition Specified Condition
      A46-13 (CANH) - A46-26 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω

      Result

      Result
      OK
      NG

    Result: 

    OK 

    REPLACE ECM 

    Refer to REMOVAL [04/2020 - 09/2022]

    Result: 

    NG 

    REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (ECM - NO. 2 CAN JUNCTION CONNECTOR) 

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