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Home >> Lexus >> 2017 >> RC 350 Base, AWD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Communication Devices >> Can Communication System - Circuit Tests (5 Of 5) >> Can Communication System >> Open in Bus 5 Main Bus Line [11/2017 - 09/2020] >> Procedure

Open in Bus 5 Main Bus Line [11/2017 - 09/2020]: Procedure

  1. CHECK FOR OPEN IN CAN MAIN BUS LINES (NO. 10 CAN JUNCTION CONNECTOR) 
    1. Disconnect the cable from the negative (-) battery terminal.
    2. Disconnect the O156 No. 10 CAN junction connectors.
    3. Measure the resistance according to the value(s) in the table below.
      GTY776504Courtesy 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. 12 CAN Junction Connector - -

      Standard Resistance

      Tester Connection Condition Specified Condition Connected to
      O156-1 (CANH) - O156-7 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 9 CAN junction connector
      O156-6 (CANH) - O156-12 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 12 CAN junction connector

      Result

      Result Proceed to
      OK A
      NG (Line to No. 9 CAN junction connector) B
      NG (Line to No. 12 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 MAIN BUS LINES (NO. 9 CAN JUNCTION CONNECTOR) 
    1. Reconnect the O156 No. 10 CAN junction connector.
    2. Disconnect the O151 and O152 No. 9 CAN junction connectors.
    3. Measure the resistance according to the value(s) in the table below.
      GTY792737Courtesy 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 - -

      Standard Resistance

      Tester Connection Condition Specified Condition Connected to
      O151-1 (CANH) - O151-2 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω Central gateway ECU (network gateway ECU)
      O152-1 (CANH) - O152-2 (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 MAIN BUS LINES (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)) 
    1. Reconnect the O151 and O152 No. 9 CAN junction connectors.
    2. Disconnect the O142 central gateway ECU (network gateway ECU) connector.
    3. Measure the resistance according to the value(s) in the table below.
      GTY793973Courtesy 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
      O142-15 (CA5H) - O142-16 (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 [11/2017 - ] 

    Result: 

    NG 

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

  4. CHECK FOR OPEN IN CAN MAIN BUS LINES (NO. 12 CAN JUNCTION CONNECTOR) 
    1. Reconnect the O156 No. 10 CAN junction connector.
    2. Disconnect the U62 No. 12 CAN junction connector.
    3. Measure the resistance according to the value(s) in the table below.
      GTY776515Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to No. 12 CAN Junction Connector)      		 *b to No. 10 CAN Junction Connector
      *c to No. 2 CAN Junction Terminal - -

      Standard Resistance

      Tester Connection Condition Specified Condition Connected to
      U62-3 (CANH) - U62-9 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 10 CAN junction connector
      U62-4 (CANH) - U62-10 (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. 12 CAN JUNCTION CONNECTOR 

    Result: 

    B 

    REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 12 CAN JUNCTION CONNECTOR - NO. 10 CAN JUNCTION CONNECTOR) 

    Result: 

    C 

    See step  5

  5. CHECK FOR OPEN IN CAN MAIN BUS LINES (NO. 2 CAN JUNCTION TERMINAL) 
    1. Reconnect the U62 No. 12 CAN junction connector.
    2. Disconnect the O102 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
      O102-3 (CANH) - O102-2 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω
      GTY775405Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to No. 2 CAN Junction Terminal)

      Result

      Result
      OK
      NG

    Result: 

    OK 

    REPLACE NO. 2 CAN JUNCTION TERMINAL 

    Result: 

    NG 

    REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 2 CAN JUNCTION TERMINAL - NO. 12 CAN JUNCTION CONNECTOR) 

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