Lexus NX: Stop Light Relay Actuator Stuck (C142571)

Lexus NX Service Manual / Vehicle Interior / Pre-collision / Pre-collision System / 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.

Click here

Chassis > ABS/VSC/TRC > Trouble Codes

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.
NEXT

END

READ NEXT:

 Lost Communication With Multi-axis Acceleration Sensor Module Missing Message (U012587,U012687,U012987,U029387)

DESCRIPTION DTC No. Detection Item DTC Detection Condition Trouble Area U012587 Lost Communication With Multi-axis Acceleration Sensor Module Missing Message While the vehicle is bein

 Lost Communication with Cruise Control Front Distance Range Sensor Missing Message (U023587)

DESCRIPTION The forward recognition camera is connected to the millimeter wave radar sensor assembly via the CAN communication line. When the signal from the millimeter wave radar sensor assembly is i

 Lost Communication with Image Processing Module "A" (U023A87)

DESCRIPTION The forward recognition camera is connected to the skid control ECU (brake booster with master cylinder assembly) via the CAN communication line. When the skid control ECU (brake booster w

SEE MORE:

 Operation Check

OPERATION CHECK NOTICE WHEN CHECKING FOLLOWING (a) Wireless door lock/unlock function: This wireless door lock control function operates only when the following 3 conditions are met: (1) The power switch is off. (2) All doors are closed. (3) The power door lock control system is operating properly.

 Switch Lights of Remote Touch do not Illuminate

DESCRIPTION Power is supplied to the remote touch illumination when the light control switch is in the tail or head position. WIRING DIAGRAM CAUTION / NOTICE / HINT NOTICE: Inspect the fuse for circuits related to this system before performing the following procedure. PROCEDURE 1. CONFIRM SYM

© 2016-2025 Copyright www.lexunx.com