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Home >> Infiniti >> 2017 >> QX30 Premium, AWD >> Repair and Diagnosis >> Steering >> Steering Control Systems >> Steering Control System (DTC/Circuit Diagnosis) >> DTC/Circuit Diagnosis >> DTC P1644: Control Unit >> Diagnosis Procedure >> Diagnostic Test
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Diagnostic Test

  1. CHECK THE REPLACEMENT HISTORY OF STEERING COMPONENT PARTS

    Check the replacement history of steering component parts.

    Was the steering component parts replaced?

    YES 

    GO TO STEP 2  .

    NO 

    GO TO STEP 3  .

  2. CHECK THE SPECIFICATION OF STEERING COMPONENT PARTS

    Check the specification of steering component parts.

    Is the specification of steering component parts correct?

    YES 

    GO TO STEP 4  .

    NO 

    Replace steering gear assembly. Refer to REMOVAL AND INSTALLATION .

  3. PERFORM THE SCN CODING OF ELECTRONIC IGNITION SWITCH CONTROL UNIT

    Perform the SCN coding of electronic ignition switch control unit.

    GO TO STEP 4  .

  4. PERFORM THE RESET OF CODING OF EPS CONTROL UNIT

    Perform the reset of coding of EPS control unit. Refer to DESCRIPTION .

    INSPECTION END