LEMON Manuals: Even more car manuals for everyone
Home >> Lexus >> 2024 >> RX 500h >> Repair and Diagnosis >> External Pages >> Different car >> Section 88 (Sub Battery System (W/ Advanced Park) - Diagnostic Codes) >> SUB BATTERY SYSTEM (for Gasoline Model with Advanced Park (Remote Controlled)) >> DTC P1770-62: Door Lock Switch / Curtesy Switch Signal Compare Failure [08/2023 - ] >> Procedure

DTC P1770-62: Door Lock Switch / Curtesy Switch Signal Compare Failure [08/2023 - ]: Procedure

WARNING: This page is about a different car, the 2025 Lexus RX 350, 2024 Lexus RX 350, and 2023 Lexus RX 350. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK FOR DTC 
    1. Check for DTCs.

      Body Electrical > Sub Battery System > Trouble Codes 

      Result

      Result Proceed to
      P1770-62 is output A
      P1770-62 is not output B

    Result: 

    USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [10/2022 - ] 

    Result: 

    See step  2

  2. CHECK HARNESS AND CONNECTOR (INTEGRATED CAPACITOR (INTEGRATION CONTROL SUPPLY) - FRONT DOOR LOCK WITH MOTOR ASSEMBLY LH (DOOR COURTESY SWITCH)) 

    Pre-procedure1

    • Disconnect the H191 integrated capacitor (integration control supply) connector.
    • Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition Result
      H191-17 (DRO1) - Body ground Ignition switch ON and driver door closed 10 V or higher V

      Result

      Proceed to
      OK
      NG

    Post-procedure1

    • None

    Result: 

    OK 

    REPLACE INTEGRATED CAPACITOR (INTEGRATION CONTROL SUPPLY). Refer to  REMOVAL [08/2023 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR (INTEGRATED CAPACITOR (INTEGRATION CONTROL SUPPLY) - FRONT DOOR LOCK WITH MOTOR ASSEMBLY LH (DOOR COURTESY SWITCH))