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Open in CAN Main Bus Line: Procedure

  1. CHECK DLC3 
    1. Turn the ignition switch off.
      Fig 1: Checking DLC3 E15 Connector Terminals
      GTY292861Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *1 DLC3
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Switch Condition Specified Condition
      E15-6 (CANH) - E15-14 (CANL) Ignition switch off 108 to 132 Ω
      NOTE:

      When the measured value is 132 Ω or higher and a CAN communication system diagnostic trouble code is output, there may be a fault besides disconnection of the DLC3 branch wire. For that reason, troubleshooting should be performed again from "How to Proceed with Troubleshooting". Refer to HOW TO PROCEED WITH TROUBLESHOOTING  after repairing the trouble area.

    NG → REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO DLC3 

    OK: Go to next step 

  2. CHECK FOR OPEN IN CAN BUS MAIN WIRE (CAN NO. 2 JUNCTION CONNECTOR) 
    1. Turn the ignition switch off.
      Fig 2: Checking CAN Main Bus Line Wire A36 Connector Terminals
      GTY293268Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *a Front view of wire harness connector:
      (to CAN No. 2 Junction Connector)
    2. Disconnect the CAN No. 2 junction connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Switch Condition Specified Condition
      A36-6 (CANH) - A36-4 (CANL) Ignition switch off 108 to 132 Ω

    NG → See step   6 

    OK: Go to next step 

  3. CHECK FOR OPEN IN CAN BUS MAIN WIRE 
    1. Turn the ignition switch off.
    2. Reconnect the CAN No. 2 junction connector.
    3. Disconnect the ECM connector.
    4. Measure the resistance according to the value(s) in the table below.
      Fig 3: Checking ECM Communication A37 Connector Terminals
      GTY290894Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *a Front view of wire harness connector:
      (to ECM)
      *b for 2AZ-FE
      *c for 2ZR-FE

      Standard Resistance

      Tester Connection Switch Condition Specified Condition
      A37-41 (CANH) - A37-49 (CANL)*1 Ignition switch off 108 to 132 Ω
      A37-8 (CANH) - A37-9 (CANL)*2 Ignition switch off 108 to 132 Ω

      *1: for 2AZ-FE

      *2: for 2ZR-FE

      Result

      Result Proceed to
      OK (for 2ZR-FE) A
      OK (for 2AZ-FE) B
      NG C

    B → See step   10 

    C → See step   5 

    A → See step   4 

  4. REPLACE ECM. Refer to  REMOVAL 
  5. CHECK FOR OPEN IN CAN BUS MAIN WIRE (CAN NO. 2 JUNCTION CONNECTOR - ECM) 
    1. Turn the ignition switch off.
    2. Reconnect the ECM connector.
      Fig 4: Checking CAN Main Bus Line E35 Connector Terminals
      GTY293267Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *a Front view of wire harness connector:
      (to CAN No. 2 Junction Connector)
    3. Disconnect the CAN No. 2 junction connector.
    4. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Switch Condition Specified Condition
      A35-2 (CANH) - A35-4 (CANL) Ignition switch off 108 to 132 Ω

    NG → REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (CAN NO. 2 JUNCTION CONNECTOR - ECM) 

    OK → REPLACE CAN NO. 2 JUNCTION CONNECTOR 

  6. CHECK FOR OPEN IN CAN BUS MAIN WIRE (COMBINATION METER) 
    1. Turn the ignition switch off.
    2. Reconnect the CAN No. 2 junction connector.
      Fig 5: Checking Combination Meter ECU E55 Connector Terminals
      GTY293931Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *a Front view of wire harness connector:
      (to Combination Meter)
    3. Disconnect the combination meter connector.
    4. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Switch Condition Specified Condition
      E55-27 (CANH) - E55-28 (CANL) Ignition switch off 108 to 132 Ω

    NG → See step   8 

    OK → See step   7 

  7. REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL 
  8. CHECK FOR OPEN IN CAN BUS MAIN WIRE (CAN NO. 1 JUNCTION CONNECTOR - COMBINATION METER) 
    1. Turn the ignition switch off.
    2. Reconnect the combination meter connector.
      Fig 6: Checking CAN No. 1 Junction Connector - Combination Meter E65 Connector Terminals
      GTY291274Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *a Front view of wire harness connector:
      (to CAN No. 1 Junction Connector)
    3. Disconnect the CAN No. 1 junction connector.
    4. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Switch Condition Specified Condition
      E65-4 (CANH) - E65-15 (CANL) Ignition switch off 108 to 132 Ω

    NG → REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (CAN NO. 1 JUNCTION CONNECTOR - COMBINATION METER) 

    OK: Go to next step 

  9. CHECK FOR OPEN IN CAN BUS MAIN WIRE (CAN NO. 1 JUNCTION CONNECTOR - CAN NO. 2 JUNCTION CONNECTOR) 
    1. Turn the ignition switch off.
      Fig 7: Checking CAN No. 1 Junction Connector - CAN No. 2 Junction Connector E65 Connector Terminals
      GTY291272Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *a Front view of wire harness connector:
      (to CAN No. 1 Junction Connector)
    2. Disconnect the CAN No. 1 junction connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Switch Condition Specified Condition
      E65-6 (CANH) - E65-17 (CANL) Ignition switch off 108 to 132 Ω

    NG → REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (CAN NO. 1 JUNCTION CONNECTOR - CAN NO. 2 JUNCTION CONNECTOR) 

    OK → REPLACE CAN NO. 1 JUNCTION CONNECTOR 

  10. REPLACE ECM. Refer to  REMOVAL 
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