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Home >> Lexus >> 2017 >> IS 350 Base, AWD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Communication Devices >> Can Communication System - Circuit Tests (3 Of 4) >> Can Communication System >> Open in Bus 5 Main Bus Line [10/2016 - 10/2017] >> Procedure

Open in Bus 5 Main Bus Line [10/2016 - 10/2017]: Procedure

  1. CHECK FOR OPEN IN CAN BUS LINES (NO. 10 CAN JUNCTION CONNECTOR) 
    1. Disconnect the cable from the negative (-) battery terminal.
    2. Disconnect the K146 and K151 No. 10 CAN junction connectors.
      GTY620893Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Rear view of wire harness connector
      (to No. 10 CAN Junction Connector)      		 *b to No. 9 CAN Junction Connector
      *c to No. 11 CAN Junction Connector or No. 13 CAN Junction Connector - -
      WIRING COLOR:

      Code Color (CANH Side) Color (CANL Side) Connected to
      K146 LG B No. 9 CAN junction connector
      K151 BE B No. 11 CAN junction connector or No. 13 CAN junction connector
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition Connected to
      K146-1 (CANH) - K146-2 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 9 CAN junction connector
      K151-1 (CANH) - K151-2 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 11 CAN junction connector or No. 13 CAN junction connector

      Result

      Result Proceed to
      OK A
      NG (Line to No. 9 CAN junction connector) B
      NG (Line to No. 11 CAN junction connector or No. 13 CAN junction connector) C

    Result: 

    A 

    REPLACE NO. 10 CAN JUNCTION CONNECTOR 

    Result: 

    C 

    See step  4

    Result: 

    B 

    See step  2

  2. CHECK FOR OPEN IN CAN BUS LINES (NO. 9 CAN JUNCTION CONNECTOR) 
    1. Reconnect the K146 and K151 No. 10 CAN junction connectors.
    2. Disconnect the K142 and K143 No. 9 CAN junction connectors.
      GTY658931Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Rear view of wire harness connector
      (to No. 9 CAN Junction Connector)      		 *b to Central Gateway ECU (Network Gateway ECU)
      *c to No. 10 CAN Junction Connector - -
      WIRING COLOR:

      Code Color (CANH Side) Color (CANL Side) Connected to
      K142 GR B Central gateway ECU (network gateway ECU)
      K143 LG B No. 10 CAN junction connector
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition Connected to
      K142-1 (CANH) - K142-2 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω Central gateway ECU (network gateway ECU)
      K143-1 (CANH) - K143-2 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 10 CAN junction connector

      Result

      Result Proceed to
      OK A
      NG (Line to central gateway ECU (network gateway ECU)) B
      NG (Line to No. 10 CAN junction connector) C

    Result: 

    A 

    REPLACE NO. 9 CAN JUNCTION CONNECTOR 

    Result: 

    C 

    REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 9 CAN JUNCTION CONNECTOR - NO. 10 CAN JUNCTION CONNECTOR) 

    Result: 

    B 

    See step  3

  3. CHECK FOR OPEN IN CAN BUS LINES (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)) 
    1. Reconnect the K142 and K143 No. 9 CAN junction connectors.
    2. Disconnect the K141 central gateway ECU (network gateway ECU) connector.
      GTY678387Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Central Gateway ECU (Network Gateway ECU))
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      K141-15 (CA5H) - K141-16 (CA5L) Cable disconnected from negative (-) battery terminal 108 to 132 Ω

      Result

      Result
      OK
      NG

    Result: 

    OK 

    REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU). Refer to  REMOVAL [10/2016 - 09/2020] 

    Result: 

    NG 

    REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) - NO. 9 CAN JUNCTION CONNECTOR) 

  4. CHECK VEHICLE TYPE 
    1. Reconnect the K146 and K151 No. 10 CAN junction connectors.
    2. Check whether the No. 11 CAN junction connector or No. 13 CAN junction connector is installed to the vehicle.

      Refer to PARTS LOCATION [10/2016 - 10/2017]

      GTY806273Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component with harness connected
      (No. 11 CAN Junction Connector)      		 *b Front view of wire harness connector
      (to No. 13 CAN Junction Connector)

      Result

      Result Proceed to
      w/ No. 11 CAN Junction Connector A
      w/ No. 13 CAN Junction Connector B

    Result: 

    B 

    See step  6

    Result: 

    A 

    See step  5

  5. CHECK FOR OPEN IN CAN BUS LINES (NO. 11 CAN JUNCTION CONNECTOR) 
    1. Reconnect the K146 and K151 No. 10 CAN junction connectors.
    2. Disconnect the Q62 and Q63 No. 11 CAN junction connectors.
      GTY658930Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Rear view of wire harness connector
      (to No. 11 CAN Junction Connector)      		 *b to No. 10 CAN Junction Connector
      *c to No. 2 CAN Junction Terminal - -
      WIRING COLOR:

      Code Color (CANH Side) Color (CANL Side) Connected to
      Q62 BE B No. 10 CAN junction connector
      Q63 GR B No. 2 CAN junction terminal
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition Connected to
      Q62-1 (CANH) - Q62-2 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 10 CAN junction connector
      Q63-1 (CANH) - Q63-2 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 2 CAN junction terminal

      Result

      Result Proceed to
      OK A
      NG (Line to No. 10 CAN junction connector) B
      NG (Line to No. 2 CAN junction terminal) C

    Result: 

    A 

    REPLACE NO. 11 CAN JUNCTION CONNECTOR 

    Result: 

    B 

    REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 10 CAN JUNCTION CONNECTOR - NO. 11 CAN JUNCTION CONNECTOR) 

    Result: 

    C 

    See step  7

  6. CHECK FOR OPEN IN CAN BUS LINES (NO. 13 CAN JUNCTION CONNECTOR) 
    1. Disconnect the Q68 No. 13 CAN junction connector.
      GTY822291Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to No. 13 CAN Junction Connector)
      *b to No. 10 CAN Junction Connector
      *c to No. 2 CAN Junction Terminal
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition Connected to
      Q68-3 (CANH) - Q68-9 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 10 CAN junction connector
      Q68-4 (CANH) - Q68-10 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 2 CAN junction terminal

      Result

      Result Proceed to
      OK A
      NG (Line to No. 10 CAN junction connector) B
      NG (Line to No. 2 CAN junction terminal) C

    Result: 

    A 

    REPLACE NO. 13 CAN JUNCTION CONNECTOR 

    Result: 

    B 

    REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 10 CAN JUNCTION CONNECTOR - NO. 13 CAN JUNCTION CONNECTOR) 

    Result: 

    C 

    See step  7

  7. CHECK FOR OPEN IN CAN BUS LINES (NO. 2 CAN JUNCTION TERMINAL) 
    1. Reconnect all wire harness connectors.
    2. Disconnect the K107 No. 2 CAN junction terminal connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      K107-3 (CANH) - K107-2 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω
      GTY654429Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to No. 2 CAN Junction Terminal)

      Result

      Result Proceed to
      OK A
      NG (w/ No. 11 CAN Junction Connector) B
      NG (w/ No. 13 CAN Junction Connector) C

    Result: 

    A 

    REPLACE NO. 2 CAN JUNCTION TERMINAL 

    Result: 

    B 

    REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 2 CAN JUNCTION TERMINAL - NO. 11 CAN JUNCTION CONNECTOR) 

    Result: 

    C 

    REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 2 CAN JUNCTION TERMINAL - NO. 13 CAN JUNCTION CONNECTOR) 

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