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Home >> Lexus >> 2020 >> UX 200 Luxury >> Repair and Diagnosis >> External Pages >> Different car >> Section 47 (Hybrid Control System (Diagnostic Codes) (3 Of 5)) >> Hybrid Control System >> DTC P1C6B-9F: Rear Motor Shutdown Stuck Off [10/2018 - ] >> Procedure

DTC P1C6B-9F: Rear Motor Shutdown Stuck Off [10/2018 - ]: Procedure

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2024 Lexus UX 250h, 2023 Lexus UX 250h, 2022 Lexus UX 250h, 2021 Lexus UX 250h, and 2020 Lexus UX 250h. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK CONNECTOR CONNECTION CONDITION (HYBRID MOTOR CONTROL INVERTER ASSEMBLY REAR CONNECTOR) 

    Refer to PROCEDURE - Step 2

    Result

    Result Proceed to
    OK A
    NG (The connector is not connected securely.) B
    NG (The terminals are not making secure contact or are deformed, or water or foreign matter exists in the connector.) C

    Result: 

    B 

    CONNECT SECURELY 

    Result: 

    C 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    A 

    See step  2

  2. CHECK CONNECTOR CONNECTION CONDITION (INVERTER WITH CONVERTER ASSEMBLY CONNECTOR) 

    Refer to PROCEDURE - Step 3

    Result

    Result Proceed to
    OK A
    NG (The connector is not connected securely.) B
    NG (The terminals are not making secure contact or are deformed, or water or foreign matter exists in the connector.) C

    Result: 

    B 

    CONNECT SECURELY 

    Result: 

    C 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    A 

    See step  3

  3. CHECK HARNESS AND CONNECTOR (SDNR VOLTAGE) 
    WARNING:

    Be sure to wear insulated gloves.

    1. Check that the service plug grip is not installed.
      NOTE:

      After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the appropriate service information because this may cause a malfunction.

    2. Disconnect the N56 hybrid motor control inverter assembly rear connector.
      GTY797751Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Hybrid Motor Control Inverter Assembly Rear)
    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Display  Switch Condition Specified Condition
      N56-4 (SDNR) - Body ground Power switch on (IG) Below 1 V
    4. Connect the N56 hybrid motor control inverter assembly rear connector.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE HYBRID MOTOR CONTROL INVERTER ASSEMBLY REAR. Refer to  REMOVAL [10/2018 - 07/2022]  Refer to  REMOVAL [07/2022 - ] 

    Result: 

    NG 

    See step  4

  4. CHECK HARNESS AND CONNECTOR (HYBRID MOTOR CONTROL INVERTER ASSEMBLY REAR - INVERTER WITH CONVERTER ASSEMBLY) 
    WARNING:

    Be sure to wear insulated gloves.

    1. Check that the service plug grip is not installed.
      NOTE:

      After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the appropriate service information because this may cause a malfunction.

    2. Disconnect the N56 hybrid motor control inverter assembly rear connector.
      GTY826119Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Hybrid Motor Control Inverter Assembly Rear)
      *b Front view of wire harness connector
      (to Inverter with Converter Assembly)
    3. Disconnect the C41 inverter with converter assembly connector.
    4. Measure the voltage according to the value(s) in the table below.

      Standard Resistance (Check for Open)

      Tester Display  Switch Condition Specified Condition
      N56-4 (SDNR) - C41-18 (SDNR) Power switch off Below 1 Ω

      Standard Resistance (Check for Short)

      Tester Display  Switch Condition Specified Condition
      N56-4 (SDNR) or C41-18 (SDNR) - Body ground and other terminals Power switch off 10 kΩ or higher
    5. Connect the C41 inverter with converter assembly connector.
    6. Disconnect the N56 hybrid motor control inverter assembly rear connector.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE HYBRID MOTOR CONTROL INVERTER ASSEMBLY REAR. Refer to  REMOVAL [10/2018 - 07/2022]  Refer to  REMOVAL [07/2022 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

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