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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SEE MORE:
Do-it-yourself service precautions
If you perform maintenance by
yourself, be sure to follow the correct
procedure as given in these
sections.
Maintenance
Items
Parts and tools
12-volt battery
condition
Grease
Conventional wrench
(for terminal clamp
bolts)
Brake flui
Removal
REMOVAL PROCEDURE 1. PRECAUTION CAUTION: Be sure to read Precoution thoroughly before serving. Click here NOTICE: After the power switch is turned off, there may be a waiting time before disconnecting the negative (-) auxiliary battery terminal. Click here 2. REMOVE NO. 3 DECK BOARD SUB-ASSEMBLY
