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Home >> Lexus >> 2020 >> UX 200 Luxury >> Repair and Diagnosis >> External Pages >> Different car >> Section 64 (Can Communication System (Diagnostic Codes & Symptom Tests (1 Of 3)) (Hybrid)) >> CAN COMMUNICATION SYSTEM (for HV Model) >> Driver Seat Control ECU Communication Stop Mode [10/2018 - ] >> Procedure

Driver Seat Control ECU Communication Stop Mode [10/2018 - ]: Procedure

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  1. CHECK FOR OPEN IN CAN BUS LINES (POSITION CONTROL ECU ASSEMBLY LH BRANCH LINE) 
    1. Disconnect the cable from the negative (-) auxiliary battery terminal.
    2. Disconnect the position control ECU assembly LH connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      f15-13 (CANP) - f15-14 (CANN) Cable disconnected from negative (-) auxiliary battery terminal 54 to 69 Ω
      GTY809155Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Position Control ECU Assembly LH)

      Result

      Proceed to 
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE CAN BRANCH LINES OR CONNECTOR (POSITION CONTROL ECU ASSEMBLY LH) 

    Result: 

    OK 

    See step  2

  2. CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT) 
    1. Disconnect the position control ECU assembly LH connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      f13-2 (GND) - Body ground Cable disconnected from negative (-) auxiliary battery terminal Below 1 Ω
      GTY799963Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Position Control ECU Assembly LH)
    3. Reconnect the cable to the negative (-) auxiliary battery terminal.
    4. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      f13-3 (+B) - Body ground Power switch off 11 to 14 V
      f15-1 (IG) - Body ground Power switch on (IG) 11 to 14 V
      f15-15 (SYSB) - Body ground Power switch off 11 to 14 V

      Result

      Proceed to 
      OK
      NG

    Result: 

    OK 

    REPLACE POSITION CONTROL ECU ASSEMBLY LH. Refer to  REMOVAL [10/2018 - 07/2022]  , or refer to  REMOVAL [07/2022 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT) 

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