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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) >> Motor Generator Control ECU Communication Stop Mode [10/2018 - ] >> Procedure

Motor Generator Control ECU Communication Stop Mode [10/2018 - ]: Procedure

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  1. CHECK FOR OPEN IN CAN BUS LINES (INVERTER WITH CONVERTER ASSEMBLY BRANCH LINE) 
    1. Disconnect the cable from the negative (-) auxiliary battery terminal.
    2. Disconnect the inverter with converter assembly connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      C41-1 (CANH) - C41-7 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 54 to 69 Ω
      GTY815562Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Inverter with Converter Assembly)

      Result

      Proceed to 
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE CAN BRANCH LINES OR CONNECTOR (INVERTER WITH CONVERTER 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.

      Standard Resistance

      Tester Connection Condition Specified Condition
      C41-23 (GND2) - Body ground Cable disconnected from negative (-) auxiliary battery terminal Below 1 Ω
      C41-24 (GND1) - Body ground Cable disconnected from negative (-) auxiliary battery terminal Below 1 Ω
      GTY815561Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Inverter with Converter Assembly)
    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
      C41-5 (+B2) - Body ground Power switch on (IG) 11 to 14 V
      C41-6 (+B) - Body ground Power switch on (IG) 11 to 14 V
      C41-12 (IGCT) - Body ground Power switch on (IG) 11 to 14 V

      Result

      Proceed to 
      OK
      NG

    Result: 

    OK 

    REPLACE MG ECU (REPLACE INVERTER WITH CONVERTER ASSEMBLY) 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT) 

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