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Home >> Infiniti >> 2024 >> QX55 Essential >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Drivers Assistance Systems - ADAS >> ADAS Control Unit (DTC/Circuit Diagnosis) >> DTC/Circuit Diagnosis >> C1A39 Steering Angle Sensor >> ADAS Control Unit >> DTC Description
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DTC Description

DTC DETECTION LOGIC 

DTC No. CONSULT screen items (Trouble diagnosis content) DTC detection condition
 
C1A39 97 STRG SEN CIR (Steering angle sensor circuit) Diagnosis condition
  • When engine is running
  • When MAIN switch of ICC/ProPILOT Assist system is ON
Signal (terminal) -
Threshold If the steering angle sensor is malfunction
Diagnosis delay time 2 seconds or more

POSSIBLE CAUSE 

Steering angle sensor

FAIL-SAFE 

The following systems are canceled.

CONFIRMATION PROCEDURE 

  1. CHECK DTC PRIORITY 

    If DTC "C1A39-97" is displayed with DTC "U1000-01", first diagnose the DTC "U1000-01".

    Is applicable DTC detected?

    >>

    Perform diagnosis of applicable. Refer to DTC Description .

    >>

    GO TO 2.

  2. PERFORM DTC CONFIRMATION PROCEDURE 
    1. Start the engine.
    2. Turn the MAIN switch of ICC/ProPILOT Assist system ON.
    3. Perform "All DTC Reading" with CONSULT.
    4. Check if the "C1A39-97" is detected as the current malfunction in self-diagnosis results of "ICC/ADAS".

    Is "C1A39-97" detected as the current malfunction?

    >>

    Refer to Diagnosis Procedure .

    >>

    To check malfunction symptom before repair: Refer to Intermittent Incident .

    >>

    Confirmation after repair: INSPECTION END