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Home >> Lexus >> 2020 >> UX 200 Luxury >> Repair and Diagnosis >> External Pages >> Different car >> Section 42 (Hybrid Control System (Diagnostic Codes) (2 Of 5)) >> Hybrid Control System >> DTC P0AE4-11: Hybrid/EV Battery Precharge Contactor Circuit Short to Ground [10/2018 - ] >> Procedure

DTC P0AE4-11: Hybrid/EV Battery Precharge Contactor Circuit Short to Ground [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 HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - BODY GROUND) 
    1. Disconnect the F60 hybrid vehicle control ECU connector.
    2. Measure the resistance according to the value(s) in the table below.
      GTY810492Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Hybrid Vehicle Control ECU)

      Standard Resistance

      Tester Connection Switch Condition Specified Condition
      F60-15 (SMRP) - Body ground Power switch off 140 to 290 Ω
    3. Reconnect the F60 hybrid vehicle control ECU connector.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE HYBRID VEHICLE CONTROL ECU. Refer to  REMOVAL [10/2018 - 07/2022]  Refer to  REMOVAL [07/2022 - ] 

    Result: 

    NG 

    See step  2

  2. CHECK CONNECTOR CONNECTION CONDITION (FLOOR WIRE CONNECTOR) 

    See step  5

    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 (HYBRID VEHICLE CONTROL ECU - HV BATTERY JUNCTION BLOCK 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. Remove the No. 1 HV battery cover panel RH.

      Refer to PROCEDURE - Step 17 [10/2018 - 07/2022] Refer to PROCEDURE - Step 17 [07/2022 - ]

    3. Disconnect the N41 HV battery junction block assembly connector.
      GTY827214Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Disconnect the F60 hybrid vehicle control ECU connector.
    5. Measure the resistance according to the value(s) in the table below.
      GTY787567Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Hybrid Vehicle Control ECU)
      *b Front view of wire harness connector
      (to HV Battery Junction Block Assembly)

      Standard Resistance

      Tester Connection Switch Condition Specified Condition
      F60-15 (SMRP) and N41-2 (SMRP) - Body ground and other terminals Power switch off 10 kΩ or higher
    6. Reconnect the F60 hybrid vehicle control ECU connector.
    7. Reconnect the N41 HV battery junction block assembly connector.
    8. Install the No. 1 HV battery cover panel RH.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE HV BATTERY JUNCTION BLOCK ASSEMBLY. Refer to  REMOVAL [10/2018 - 07/2022]  Refer to  REMOVAL [07/2022 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

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