LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Infiniti >> 2021 >> QX50 Essential, 4WD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Collision/Avoidance >> ADAS Control Unit (DTC/Circuit Diagnosis) (1 Of 2) >> DTC C1A40: System Switch Circuit >> ADAS Control Unit 2 >> DTC Description >> DTC Detection Logic
April 5, 2026: LEMON Manuals is launched! Read the announcement.

DTC Detection Logic

DTC

CONSULT screen terms

DTC detection condition

(Trouble diagnosis content)

[Malfunction type]

C1A40

23

SYSTEM SW CIRC

[SWITCH SIGNAL STUCK]

Diagnosis condition

When engine is running

Signal (terminal)

--

Threshold

ADAS control unit 2 detects warning system switch is stuck ON

Diagnosis delay time

10 minutes or more