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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) >> Power Steering ECU Communication Stop Mode [10/2018 - ] >> Procedure

Power Steering ECU Communication Stop Mode [10/2018 - ]: Procedure

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  1. CHECK FOR OPEN IN CAN BUS LINES (POWER STEERING ECU WITH MOTOR ASSEMBLY BRANCH LINE) 
    1. Disconnect the cable from the negative (-) auxiliary battery terminal.
    2. Disconnect the power steering ECU with motor assembly connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      F56-7 (CANH) - F56-8 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 54 to 69 Ω
      GTY816914Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Power Steering ECU with Motor Assembly)

      Result

      Proceed to 
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE CAN BRANCH LINES OR CONNECTOR (POWER STEERING ECU WITH MOTOR ASSEMBLY) 

    Result: 

    OK 

    See step  2

  2. CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT) 
    1. Measure the resistance according to the value(s) in the table below.
      GTY836770Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Power Steering ECU with Motor Assembly)

      Standard Resistance

      Tester Connection Condition Specified Condition
      F55-2 (PGND) - Body ground Cable disconnected from negative (-) auxiliary battery terminal Below 1 Ω
    2. Reconnect the cable to the negative (-) auxiliary battery terminal.
    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      F56-1 (IG) - Body ground Power switch on (IG) 11 to 14 V

      Result

      Result  Proceed to 
      OK (for Manual Tilt and Manual Telescopic Steering Column) A
      OK (for Power Tilt and Power Telescopic Steering Column) B
      NG C

    Result: 

    A 

    REPLACE POWER STEERING ECU WITH MOTOR ASSEMBLY. Refer to  REMOVAL [10/2018 - 07/2022]  , or refer to  REMOVAL [07/2022 - ] 

    Result: 

    B 

    REPLACE POWER STEERING ECU WITH MOTOR ASSEMBLY. Refer to  REMOVAL [10/2018 - 07/2022]  , or refer to  REMOVAL [07/2022 - ] 

    Result: 

    C 

    REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT) 

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