LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Infiniti >> 2015 >> Q60 Base, 2D Convertible >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System (Diagnostic Trouble Codes (DTCS) P0447-P2123) (Convertible) >> DTC/Circuit Diagnosis >> DTC P1572: ASCD Brake Switch >> DTC Logic >> DTC Confirmation Procedure
April 5, 2026: LEMON Manuals is launched! Read the announcement.

DTC Confirmation Procedure

  1. PRECONDITIONING

    If DTC Confirmation Procedure has been previously conducted, always perform the following procedure before conducting the next test.

    1. Turn ignition switch OFF and wait at least 10 seconds.
    2. Turn ignition switch ON.
    3. Turn ignition switch OFF and wait at least 10 seconds.
    NOTE:

    The procedure for malfunction B is not described. It takes an extremely long time to complete the procedure for malfunction B. By performing the procedure for malfunction A, the condition that causes malfunction B can be detected.

    GO TO STEP 2  .

  2. PERFORM DTC CONFIRMATION PROCEDURE FOR MALFUNCTION A

    1. Start engine (VDC switch OFF).
    2. Press MAIN switch and make sure that CRUISE lamp illuminates.
    3. Drive the vehicle for at least 5 consecutive seconds under the following conditions.
      CAUTION:

      Always drive vehicle at a safe speed.

      NOTE:

      This procedure may be conducted with the drive wheels lifted in the shop or by driving the vehicle. If a road test is expected to be easier, it is unnecessary to lift the vehicle. 

      Vehicle speed More than 30 km/h (19 mph)
      Selector lever Suitable position
    4. Check 1st trip DTC.

    Is 1st trip DTC detected?

    YES 

    Go to DIAGNOSIS PROCEDURE .

    NO 

    GO TO STEP 3  .

  3. PERFORM DTC CONFIRMATION PROCEDURE

    1. Drive the vehicle for at least 5 consecutive seconds under the following conditions.
      CAUTION:

      Always drive vehicle at a safe speed.

      NOTE:

      This procedure may be conducted with the drive wheels lifted in the shop or by driving the vehicle. If a road test is expected to be easier, it is unnecessary to lift the vehicle. 

      Vehicle speed More than 30 km/h (19 mph)
      Selector lever Suitable position
      Driving location Depress the brake pedal for more than 5 seconds so as not to come off from the above-mentioned vehicle speed.
    2. Check 1st trip DTC.

    Is 1st trip DTC detected?

    YES 

    Go to DIAGNOSIS PROCEDURE .

    NO 

    INSPECTION END

scientia non olet · About LEMON Manuals