LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Infiniti >> 2021 >> QX50 Essential, 4WD >> Repair and Diagnosis >> Accessories & Equipment >> Drivers Assistance Systems - ADAS >> ADAS Control Unit (DTC/Circuit Diagnosis) (1 Of 2) >> DTC C1A40: System Switch Circuit >> ADAS Control Unit >> With Direct Adaptive Steering System >> Diagnosis Procedure
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Diagnosis Procedure

  1. WARNING SYSTEM SWITCH CIRCUIT 

    Check the warning system switch circuit. Refer to Component Function Check .

    Is the inspection result normal?

    YES

    Replace ADAS control unit. Refer to Removal and Installation .

    NO

    Repair or replace malfunctioning parts.

scientia non olet · About LEMON Manuals