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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 1 Main Bus Line [01/2019 - 09/2022] >> Procedure

Open in Bus 1 Main Bus Line [01/2019 - 09/2022]: Procedure

WARNING: This page is about a different variant/trim than selected.
  1. CHECK VEHICLE TYPE 
    1. Check vehicle type.

      Result

      Result Proceed to
      w/ Blind Spot Monitor System A
      w/o Blind Spot Monitor System B

    Result: 

    B 

    See step  6

    Result: 

    A 

    See step  2

  2. CHECK FOR OPEN IN CAN MAIN BUS LINES (NO. 1 CAN JUNCTION CONNECTOR) 
    1. Disconnect the cable from the negative (-) auxiliary battery terminal.
    2. Disconnect the I91 No. 1 CAN junction connector.
    3. Measure the resistance according to the value(s) in the table below.
      GTY912104Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to No. 1 CAN Junction Connector)      		 *b to Central Gateway ECU (Network Gateway ECU)
      *c to No. 7 CAN Junction Connector - -

      Standard Resistance

      Tester Connection Condition Specified Condition Connected to
      I91-1 (CANH) - I91-7 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω Central gateway ECU (network gateway ECU)
      I91-6 (CANH) - I91-12 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω No. 7 CAN junction connector

      Result

      Result Proceed to
      OK A
      NG (Line to central gateway ECU (network gateway ECU)) B
      NG (Line to No. 7 CAN junction connector) C

    Result: 

    A 

    REPLACE NO. 1 CAN JUNCTION CONNECTOR 

    Result: 

    C 

    See step  4

    Result: 

    B 

    See step  3

  3. CHECK FOR OPEN IN CAN MAIN BUS LINES (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) - NO. 1 CAN JUNCTION CONNECTOR) 
    1. Reconnect the I91 No. 1 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.
      GTY852967Courtesy 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
      I53-23 (CA1H) - I53-8 (CA1L) 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. 1 CAN JUNCTION CONNECTOR) 

  4. CHECK FOR OPEN IN CAN MAIN BUS LINES (NO. 7 CAN JUNCTION CONNECTOR) 
    1. Reconnect the I91 No. 1 CAN junction connector.
    2. Disconnect the O121 No. 7 CAN junction connector.
    3. Measure the resistance according to the value(s) in the table below.
      GTY883516Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to No. 7 CAN Junction Connector)      		 *b to No. 1 CAN Junction Connector
      *c to CAN Junction Terminal - -

      Standard Resistance

      Tester Connection Condition Specified Condition Connected to
      O121-2 (CANH) - O121-13 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω No. 1 CAN junction connector
      O121-3 (CANH) - O121-14 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω CAN junction terminal

      Result

      Result Proceed to
      OK A
      NG (Line to No. 1 CAN junction connector) B
      NG (Line to CAN junction terminal) C

    Result: 

    A 

    REPLACE NO. 7 CAN JUNCTION CONNECTOR 

    Result: 

    B 

    REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 7 CAN JUNCTION CONNECTOR - NO. 1 CAN JUNCTION CONNECTOR) 

    Result: 

    C 

    See step  5

  5. CHECK FOR OPEN IN CAN MAIN BUS LINES (CAN JUNCTION TERMINAL - NO. 7 CAN JUNCTION CONNECTOR) 
    1. Reconnect the O121 No. 7 CAN junction connector.
    2. Disconnect the O95 CAN junction terminal connector.
    3. Measure the resistance according to the value(s) in the table below.
      GTY882516Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to CAN Junction Terminal)

      Standard Resistance

      Tester Connection Condition Specified Condition
      O95-3 (CANH) - O95-2 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω

      Result

      Result
      OK
      NG

    Result: 

    OK 

    REPLACE CAN JUNCTION TERMINAL 

    Result: 

    NG 

    REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (CAN JUNCTION TERMINAL - NO. 7 CAN JUNCTION CONNECTOR) 

  6. CHECK FOR OPEN IN CAN MAIN BUS LINES (NO. 1 CAN JUNCTION CONNECTOR) 
    1. Disconnect the cable from the negative (-) auxiliary battery terminal.
    2. Disconnect the I91 No. 1 CAN junction connector.
    3. Measure the resistance according to the value(s) in the table below.
      GTY863076Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to No. 1 CAN Junction Connector)      		 *b to Central Gateway ECU (Network Gateway ECU)

      Standard Resistance

      Tester Connection Condition Specified Condition
      I91-1 (CANH) - I91-7 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω
      I91-6 (CANH) - I91-12 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω

      Result

      Result
      OK
      NG

    Result: 

    OK 

    REPLACE NO. 1 CAN JUNCTION CONNECTOR 

    Result: 

    NG 

    See step  7

  7. CHECK FOR OPEN IN CAN MAIN BUS LINES (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) - NO. 1 CAN JUNCTION CONNECTOR) 
    1. Reconnect the I91 No. 1 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.
      GTY929447Courtesy 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
      I53-23 (CA1H) - I53-9 (CAXH) Cable disconnected from negative (-) auxiliary battery terminal Below 1 Ω
      I53-8 (CA1L) - I53-24 (CAXL) Cable disconnected from negative (-) auxiliary battery terminal Below 1 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. 1 CAN JUNCTION CONNECTOR) 

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