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Open in CAN Main Bus Line: Procedure

  1. CHECK DLC3 
    1. Turn the ignition switch off.
      Fig 1: Identifying Terminal CANH And CANL Of DLC3 Connector
      GTY215873Courtesy 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
      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 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: Identifying Terminal CANH And CANL Of A34 Connector
      GTY243883Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    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
      A34-9 (CANH) - A34-20 (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: Identifying Terminal CANH And CANL Of ECM Connector
      GTY244334Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

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

      Result

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

    C → See step   5 

    B → See step   10 

    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: Identifying Terminal CANH And CANL Of CAN No. 2 Junction Connector
      GTY243884Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    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
      A34-10 (CANH) - A34-21 (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: Identifying Terminal CANH And CANL Of Combination Meter Connector
      GTY243484Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    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: Identifying Terminal NANH And CANL Of CAN No. 1 Junction Connector
      GTY243885Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    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: Identifying Terminal NANH And CANL Of CAN No. 1 Junction Connector
      GTY243886Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    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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