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Open in CAN Main Bus Line [08/2013 - ]: Procedure

WARNING: This page is about a different car, the 2014 Lexus ES 300h. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK FOR OPEN IN CAN BUS LINES (DLC3 BRANCH LINE) 
    1. Disconnect the cable from the negative (-) auxiliary battery terminal.
    2. Measure the resistance according to the value(s) in the table below.
      GTY398578Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Condition Specified Condition
      H29-6 (CANH) - H29-14 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 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 [08/2013 - ] .

    NG → REPAIR OR REPLACE CAN BRANCH LINE CONNECTED TO DLC3 

    OK: Go to next step 

  2. CHECK FOR OPEN IN CAN BUS LINES (ECM - CAN J/C RH1) 
    1. Disconnect the A22 ECM connector.
      GTY420201Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      A22-13 (CANH) -A22-26 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω
      TEXT IN ILLUSTRATION

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

    NG → See step   3 

    OK → See step   7 

  3. CHECK FOR OPEN IN CAN BUS LINES (COMBINATION METER ASSEMBLY - CAN J/C LH1) 
    1. Reconnect the A22 ECM connector.
    2. Disconnect the H14 combination meter assembly connector.
      GTY414935Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      H14-28 (CANH) - H14-29 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 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   6 

  4. CHECK FOR OPEN IN CAN BUS LINES (CAN J/C LH1) 
    1. Reconnect the H14 combination meter assembly connector.
    2. Disconnect the H116 CAN junction connector LH1.
      GTY401370Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Disconnect the H117 CAN junction connector LH1.
    4. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition Connected to
      H116-1 (CANH) - H116-2 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω CAN junction connector RH1
      H117-1 (CANH) - H117-2 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω Combination meter assembly

      Wiring Color

      Code Color (CANH Side) Color (CANL Side) Connected to
      H116 R W CAN junction connector RH1
      H117 G W Combination meter assembly
      TEXT IN ILLUSTRATION

      *a Rear view of wire harness connector
      (to CAN Junction Connector LH1)
      *b to Combination Meter Assembly
      *c to CAN Junction Connector RH1
      NOTE:
      • Before disconnecting the connectors, make a note of where they are connected.
      • Reconnect each connector to its original position.

      Result

      Result Proceed to
      OK A
      NG (Combination meter assembly main line) B
      NG (CAN junction connector RH1 main line) C

    B → REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (CAN J/C LH1 - COMBINATION METER ASSEMBLY) 

    C → See step   5 

    A → REPLACE CAN JUNCTION CONNECTOR LH1 

  5. CHECK FOR OPEN IN CAN BUS LINES (CAN J/C RH1) 
    1. Reconnect the H116 CAN junction connector LH1.
    2. Reconnect the H117 CAN junction connector LH1.
    3. Disconnect the H122 CAN junction connector RH1.
      GTY420235Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Disconnect the H125 CAN junction connector RH1.
    5. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition Connected to
      H122-1 (CANH) - H122-2 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω CAN junction connector LH1
      H125-1 (CANH) - H125-2 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω ECM

      Wiring Color

      Code Color (CANH Side) Color (CANL Side) Connected to
      H122 R W CAN junction connector LH1
      H125 L W ECM
      TEXT IN ILLUSTRATION

      *a Rear view of wire harness connector
      (to CAN junction Connector RH1)
      *b to CAN junction Connector LH1
      *c to ECM
      NOTE:
      • Before disconnecting the connectors, make a note of where they are connected.
      • Reconnect each connector to its original position.

      Result

      Result Proceed to
      OK A
      NG (CAN junction connector LH1 main line) B
      NG (ECM main line) C

    B → REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (CAN J/C LH1 - CAN J/C RH1) 

    C → REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (CAN J/C RH1 - ECM) 

    A → REPLACE CAN JUNCTION CONNECTOR RH1 

  6. REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL [08/2013 - ] 
  7. REPLACE ECM. Refer to  REMOVAL [08/2013 - ] 
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