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

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

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  1. CHECK FOR OPEN IN CAN BUS WIRE (STEREO COMPONENT EQUALIZER ASSEMBLY BRANCH WIRE) 
    1. Disconnect the cable from the negative (-) auxiliary battery terminal.
    2. Disconnect the stereo component equalizer assembly connector.
      GTY832274Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Stereo Component Equalizer Assembly)
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      F16-4 (CANH) - F16-12 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 54 to 69 Ω

      Result

      Proceed to 
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE CAN BRANCH WIRE OR CONNECTOR 

    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.

      Standard Resistance

      Tester Connection Condition Specified Condition
      F16-1 (GND) - Body ground Cable disconnected from negative (-) auxiliary battery terminal Below 1 Ω
      F16-9 (GND1) - Body ground Cable disconnected from negative (-) auxiliary battery terminal Below 1 Ω
      GTY798016Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Stereo Component Equalizer Assembly)
    2. Reconnect the cable to the negative (-) auxiliary battery terminal.
      NOTE:

      When disconnecting the cable, some systems need to be initialized after the cable is reconnected.

      Refer to INITIALIZATION [10/2018 - 07/2022] , or refer to INITIALIZATION [07/2022 - ]

    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      F16-3 (+B) - Body ground Power switch off 11 to 14 V
      F16-11 (IG) - Body ground Power switch on (IG) 11 to 14 V

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE STEREO COMPONENT EQUALIZER ASSEMBLY. 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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