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Home >> Infiniti >> 2019 >> QX50 Essential, FWD >> Repair and Diagnosis >> Accessories & Equipment >> Drivers Assistance Systems - ADAS >> ADAS Control Unit (DTC/Circuit Diagnosis) (1 Of 2) >> DTC/Circuit Diagnosis >> DTC C1A40: System Switch Circuit >> ADAS Control Unit 2 >> Diagnosis Procedure
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Diagnosis Procedure

Regarding Wiring Diagram information, refer to appropriate Wiring Diagram .

  1. CHECK DTC PRIORITY 

    If DTC "C1A40-23" is displayed with DTC "U1000-01", first diagnose the DTC "U1000-01".

    Is applicable DTC detected?

    YES

    Perform diagnosis of applicable. Refer to DTC Description .

    NO

    GO TO 2.

  2. CHECK SELF-DIAGNOSIS RESULTS 

    Check if any DTC is detected in "Self Diagnostic Result" of "Self Diagnostic Result" of "ICC/ADAS".

    Is any DTC detected?

    YES

    Perform diagnosis on the detected DTC and repair or replace the malfunctioning parts. Refer to DTC Index .

    NO

    Replace the ADAS control unit 2. Refer to Removal and Installation .