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Open in CAN Main Bus Line: 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.
      Fig 1: Identifying H44 Connector Terminals
      GTY348201Courtesy 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. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2012 - ] .

    NG → REPAIR OR REPLACE CAN BRANCH LINE CONNECTED TO DLC3 

    OK: Go to next step 

  2. CHECK FOR OPEN IN CAN BUS LINES (ECM) 
    1. Disconnect the ECM connector.
      Fig 2: Identifying A 60 Connector Terminals
      GTY351338Courtesy 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)

    NG → See step   3 

    OK → See step   9 

  3. CHECK FOR OPEN IN CAN BUS LINES (COMBINATION METER ASSEMBLY) 
    1. Reconnect the ECM connector.
    2. Disconnect the combination meter assembly connector.
      Fig 3: Identifying H19 Connector Terminals
      GTY352280Courtesy 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)

    NG → See step   4 

    OK → See step   8 

  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.
      Fig 4: Identifying H104 Connector Terminals
      GTY347949Courtesy 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

    B → See step   5 

    C → See step   7 

    A → REPLACE CAN NO. 2 JUNCTION CONNECTOR 

  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.
      Fig 5: Identifying H112 Connector Terminals
      GTY348707Courtesy 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

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

    OK: Go to next step 

  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.
      Fig 6: Identifying A57 Connector Terminals
      GTY348700Courtesy 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

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

    OK → REPLACE CAN NO. 1 JUNCTION CONNECTOR 

  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.
      Fig 7: Identifying H113 Connector Terminals
      GTY348701Courtesy 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

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

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

    A → REPLACE CAN NO. 3 JUNCTION CONNECTOR 

  8. REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL [08/2012 - ] 
  9. REPLACE ECM. Refer to  REMOVAL [08/2012 - ] 
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