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Home >> Lexus >> 2020 >> UX 200 Luxury >> Repair and Diagnosis >> External Pages >> Different car >> Section 71 (Can Communication System (Symptom Tests) (2 Of 3) (Hybrid)) >> CAN COMMUNICATION SYSTEM (for HV Model) >> Open in Bus 3 Main Bus Line [10/2018 - ] >> Procedure

Open in Bus 3 Main Bus Line [10/2018 - ]: Procedure

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  1. CHECK FOR OPEN IN CAN MAIN BUS LINES (NO. 5 CAN JUNCTION CONNECTOR) 
    1. Disconnect the cable from the negative (-) auxiliary battery terminal.
    2. Disconnect the No. 5 CAN junction connector.
    3. Measure the resistance according to the value(s) in the table below.
      GTY838092Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to No. 5 CAN Junction Connector)      		 *b to Central Gateway ECU (Network Gateway ECU)

      Standard Resistance

      Tester Connection Condition Specified Condition
      F91-1 (CANH) - F91-12 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω
      F91-2 (CANH) - F91-13 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE NO. 5 CAN JUNCTION CONNECTOR 

    Result: 

    NG 

    See step  2

  2. CHECK FOR OPEN IN CAN MAIN BUS LINES (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) - NO. 5 CAN JUNCTION CONNECTOR) 
    1. Reconnect the F91 No. 5 CAN junction connector.
    2. Disconnect the central gateway ECU (network gateway ECU) connector.
    3. Measure the resistance according to the value(s) in the table below.
      GTY784384Courtesy 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
      F61-6 (CA3H) - F61-19 (CAYH) Cable disconnected from negative (-) auxiliary battery terminal Below 1 Ω
      F61-21 (CA3L) - F61-20 (CAYL) Cable disconnected from negative (-) auxiliary battery terminal Below 1 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU). Refer to  REMOVAL [10/2018 - 07/2022]  , or refer to  REMOVAL [07/2022 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) - NO. 5 CAN JUNCTION CONNECTOR) 

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