Lexus NX: Stop Light Relay Actuator Stuck (C142571)
DESCRIPTION
The stop light switch assembly and skid control ECU (brake booster with master cylinder assembly) outputs stop light signals. When the skid control ECU (brake booster with master cylinder assembly) detects a malfunction relating to the stop light circuit, the forward recognition camera is notified via CAN communication, and C142571 is output.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| C142571 | Stop Light Relay Actuator Stuck | Once 3 seconds elapse after turning the power switch on (IG), the system receives a stop light circuit malfunction signal from the skid control ECU (brake booster with master cylinder assembly) for approximately 1 second or more. | Electronically controlled brake system |
PROCEDURE
| 1. | CHECK ELECTRONICALLY CONTROLLED BRAKE SYSTEM |
(a) Check electronically controlled brake system.
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HINT:
- When C142571 is detected by the pre-collision system, C1380 may also be detected in the electronically controlled brake system. Therefore, check the electronically controlled brake system first when C142571 is detected.
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Diagnosis System
DIAGNOSIS SYSTEM DESCRIPTION (a) Blind spot monitor data and Diagnostic Trouble Codes (DTCs) can be read from the Data Link Connector 3 (DLC3) of the vehicle. When the system seems to be malfunctioning, use the Techstream to check for malfunctions and perform repairs. CHECK DLC3 (a) Check the DLC3.
Precaution
PRECAUTION NOTICE: When disassembling the headlight assembly, use static electricity countermeasures SST (desktop antistatic mat set) and observe all precautions to prevent damage to the system by electrostatic discharge (ESD). STATIC ELECTRICITY COUNTERMEASURES SST SST:Desktop antistatic mat set (0
