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.
- CHECK FOR DTC
- 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:
B
USE SIMULATION METHOD TO CHECK. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2022 - ]
Result:
A
See step 2
- Check for DTCs.
- 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))