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.
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