LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Infiniti >> 2021 >> Q50 Pure, AWD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Drivers Assistance Systems - ADAS >> Driver Assistance System (DTCS) (1 Of 2) >> ICC/ADAS (ADAS Control Unit) >> DTC C1A05: Brake SW/Stop Lamp SW >> DTC Description >> With Predictive Forward Collision Warning >> DTC Detection Logic
April 5, 2026: LEMON Manuals is launched! Read the announcement.

DTC Detection Logic

DTC

Trouble diagnosis name

DTC detecting condition

C1A05

BRAKE SW/STOP L SW

(Brake switch/Stop lamp switch)

A mismatch between a stop lamp switch signal and a brake pedal position switch signal received from ECM and a stop lamp signal received from the ABS actuator and electric unit (control unit) continues for 10 seconds or more with vehicle speeds at approximately 40 km/h or more