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Open in Bus 2 Main Bus Line [11/2017 - ]: Procedure

  1. CHECK FOR OPEN IN CAN BUS LINES (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) BRANCH LINE) 
    1. Disconnect the cable from the negative (-) battery terminal.
    2. Disconnect the O142 central gateway ECU (network gateway ECU) connector.
    3. Measure the resistance according to the value(s) in the table below.
      GTY831402Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Central Gateway ECU (Network Gateway ECU))

      Standard Resistance

      Tester Connection Condition Specified Condition
      O142-18 (CA4H) - O142-17 (CA4L) Cable disconnected from negative (-) battery terminal 108 to 132 Ω
      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 central gateway ECU (network gateway ECU) 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 [11/2017 - 10/2018] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2018 - ]

      Result

      Result
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE CAN BRANCH LINES CONNECTED TO CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) 

    Result: 

    OK 

    See step  2

  2. CHECK FOR OPEN IN CAN MAIN BUS LINES (COMBINATION METER ASSEMBLY) 
    1. Disconnect the O3 combination meter assembly connector.
    2. Measure the resistance according to the value(s) in the table below.
      GTY830931Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Combination Meter Assembly)

      Standard Resistance

      Tester Connection Condition Specified Condition
      O3-29 (CANH) - O3-30 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω

      Result

      Result
      OK
      NG

    Result: 

    OK 

    REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL [09/2014 - ] 

    Result: 

    NG 

    See step  3

  3. CHECK FOR OPEN IN CAN MAIN BUS LINES (ECM) 
    1. Reconnect the O3 combination meter assembly connector.
    2. Disconnect the A82 or A91 ECM connector.
    3. Measure the resistance according to the value(s) in the table below.
      GTY826970Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *A for 8AR-FTS
      *B for 2GR-FKS
      *a Front view of wire harness connector
      (to ECM)

      Standard Resistance

      FOR 8AR-FTS

      Tester Connection Condition Specified Condition
      A82-13 (CANH) - A82-26 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω
      FOR 2GR-FKS

      Tester Connection Condition Specified Condition
      A91-13 (CANH) - A91-26 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω

      Result

      Result Proceed to
      OK (for 8AR-FTS) A
      OK (for 2GR-FKS) B
      NG C

    Result: 

    A 

    REPLACE ECM. Refer to  REMOVAL [10/2015 - ] 

    Result: 

    B 

    REPLACE ECM. Refer to  REMOVAL [11/2017 - ] 

    Result: 

    C 

    See step  4

  4. CHECK FOR OPEN IN CAN MAIN BUS LINES (NO. 1 CAN JUNCTION CONNECTOR) 
    1. Reconnect the A82 or A91 ECM connector.
    2. Disconnect the O104 No. 1 CAN junction connector.
    3. Measure the resistance according to the value(s) in the table below.
      GTY816897Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to No. 1 CAN Junction Connector)      		 *b to No. 2 CAN Junction Connector
      *c to Combination Meter Assembly - -

      Standard Resistance

      Tester Connection Condition Specified Condition Connected to
      O104-1 (CANH) - O104-11 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 2 CAN junction connector
      O104-2 (CANH) - O104-12 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω Combination meter assembly

      Result

      Result Proceed to
      OK A
      NG (Line to combination meter assembly) B
      NG (Line to No. 2 CAN junction connector) C

    Result: 

    A 

    REPLACE NO. 1 CAN JUNCTION CONNECTOR 

    Result: 

    B 

    REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 1 CAN JUNCTION CONNECTOR - COMBINATION METER ASSEMBLY) 

    Result: 

    C 

    See step  5

  5. CHECK FOR OPEN IN CAN MAIN BUS LINES (NO. 2 CAN JUNCTION CONNECTOR) 
    1. Reconnect the O104 No. 1 CAN junction connector.
    2. Disconnect the O105 No. 2 CAN junction connector.
    3. Measure the resistance according to the value(s) in the table below.
      GTY836449Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to No. 2 CAN Junction Connector)      		 *b to No. 1 CAN Junction Connector
      *c to ECM - -

      Standard Resistance

      Tester Connection Condition Specified Condition Connected to
      O105-1 (CANH) - O105-11 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 1 CAN junction connector
      O105-3 (CANH) - O105-13 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω ECM

      Result

      Result Proceed to
      OK A
      NG (Line to ECM) B
      NG (Line to No. 1 CAN junction connector) C

    Result: 

    A 

    REPLACE NO. 2 CAN JUNCTION CONNECTOR 

    Result: 

    B 

    REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 2 CAN JUNCTION CONNECTOR - ECM) 

    Result: 

    C 

    REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 2 CAN JUNCTION CONNECTOR - NO. 1 CAN JUNCTION CONNECTOR) 

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