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Open in CAN Main Bus Line [08/2014 - ]: Procedure

  1. CHECK FOR OPEN IN CAN BUS LINES (DLC3 BRANCH LINE) 
    1. Turn the power switch off.
    2. Measure the resistance according to the value(s) in the table below.
      GTY522384Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Condition Specified Condition
      H44-6 (CANH) - H44-14 (CANL) Power switch off 108 to 132 Ω
      TEXT IN ILLUSTRATION

      *1 DLC3
      NOTE:

      When the measured value is 133 Ω or higher and a CAN communication system DTC is output, there may be a fault besides disconnection of the DLC3 branch line. For that reason, troubleshooting should be performed again from How to Proceed with Troubleshooting after repairing the trouble area (See article. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2014 - ] ).

    Result:  NG

    NG 

    REPAIR OR REPLACE CAN BRANCH LINE CONNECTED TO DLC3 

    Result:  OK

    OK 

    See step  2

  2. CHECK FOR OPEN IN CAN BUS LINES (ECM) 
    1. Disconnect the ECM connector.
      GTY527989Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Switch Condition Specified Condition
      A60-13 (CANH) - A60-5 (CANL) Power switch off 108 to 132 Ω
      TEXT IN ILLUSTRATION

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

    Result:  OK

    OK 

    REPLACE ECM 

    (See article. Refer to REMOVAL [08/2014 - ] )

    Result:  NG

    NG 

    See step  3

  3. CHECK FOR OPEN IN CAN BUS LINES (COMBINATION METER ASSEMBLY) 
    1. Reconnect the ECM connector.
    2. Disconnect the combination meter assembly connector.
      GTY522053Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Switch Condition Specified Condition
      H19-32 (CANH) - H19-31 (CANL) Power switch off 108 to 132 Ω
      TEXT IN ILLUSTRATION

      *a Front view of wire harness connector
      (to Combination Meter Assembly)

    Result:  OK

    OK 

    REPLACE COMBINATION METER ASSEMBLY 

    (See article. Refer to REMOVAL [08/2014 - ] )

    Result:  NG

    NG 

    See step  4

  4. CHECK FOR OPEN IN CAN BUS LINES (CAN NO. 2 J/C) 
    1. Reconnect the combination meter assembly connector.
    2. Disconnect the wire harness connector from the CAN No. 2 junction connector rear side.
      GTY523927Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Switch Condition Specified Condition Connected to
      H104-1 (CANH) - H104-2 (CANL) Power switch off 108 to 132 Ω CAN No. 1 junction connector
      H104-4 (CANH) - H104-5 (CANL) Power switch off 108 to 132 Ω CAN No. 3 junction connector
      TEXT IN ILLUSTRATION

      *a Front view of wire harness connector
      (to CAN No. 2 Junction Connector Rear Side)
      *b to CAN No. 1 Junction Connector
      *c to CAN No. 3 Junction Connector

      Result

      Result Proceed to
      OK A
      NG (CAN No. 1 junction connector main line) B
      NG (CAN No. 3 junction connector main line) C

    Result:  A

    A 

    REPLACE CAN NO. 2 JUNCTION CONNECTOR 

    Result:  C

    C 

    See step  7

    Result:  B

    B 

    See step  5

  5. CHECK FOR OPEN IN CAN BUS LINES (CAN NO. 2 J/C - CAN NO. 1 J/C) 
    1. Reconnect the wire harness connector to the CAN No. 2 junction connector rear side.
    2. Disconnect the instrument panel wire from the CAN No. 1 junction connector.
      GTY527459Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Switch Condition Specified Condition
      H112-6 (CANH) - H112-12 (CANL) Power switch off 108 to 132 Ω
      TEXT IN ILLUSTRATION

      *a Front view of wire harness connector
      (to CAN No. 1 Junction Connector)
      *b to CAN No. 2 Junction Connector

    Result:  NG

    NG 

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (CAN NO. 1 J/C - CAN NO. 2 J/C) 

    Result:  OK

    OK 

    See step  6

  6. CHECK FOR OPEN IN CAN BUS LINES (CAN NO. 1 J/C - ECM) 
    1. Disconnect the engine room main wire from the CAN No. 1 junction connector.
      GTY532860Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Switch Condition Specified Condition
      A57-1 (CANH) - A57-7 (CANL) Power switch off 108 to 132 Ω
      TEXT IN ILLUSTRATION

      *a Front view of wire harness connector
      (to CAN No. 1 Junction Connector)
      *b to ECM

    Result:  OK

    OK 

    REPLACE CAN NO. 1 JUNCTION CONNECTOR 

    Result:  NG

    NG 

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (CAN NO. 1 J/C - ECM) 

  7. CHECK FOR OPEN IN CAN BUS LINES (CAN NO. 3 J/C) 
    1. Reconnect the wire harness connector to the CAN No. 2 junction connector rear side.
    2. Disconnect the instrument panel wire from the CAN No. 3 junction connector.
      GTY527632Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Switch Condition Specified Condition Connected to
      H113-5 (CANH) - H113-11 (CANL) Power switch off 108 to 132 Ω CAN No. 2 junction connector
      H113-6 (CANH) - H113-12 (CANL) Power switch off 108 to 132 Ω Combination meter assembly
      TEXT IN ILLUSTRATION

      *a Front view of wire harness connector
      (to CAN No. 3 Junction Connector)
      *b to CAN No. 2 Junction Connector
      *c to Combination Meter Assembly

      Result

      Result Proceed to
      OK A
      NG (CAN No. 2 junction connector main line) B
      NG (Combination meter assembly main line) C

    Result:  A

    A 

    REPLACE CAN NO. 3 JUNCTION CONNECTOR 

    Result:  B

    B 

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (CAN NO. 2 J/C - CAN NO. 3 J/C) 

    Result:  C

    C 

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (CAN NO. 3 J/C - COMBINATION METER ASSEMBLY) 

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