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Home >> Infiniti >> 2014 >> Q50 Base, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - DTCS P1236 To P2138 (Except Hybrid) >> DTC P1572: Brake Pedal Position Switch >> With ASCD Models >> DTC Confirmation Procedure

DTC Confirmation Procedure

  1. CHECK DTC PRIORITY 

    If DTC P1572 is displayed with DTC P0605, first perform the confirmation procedure (trouble diagnosis) for DTC P0605.

    Is applicable DTC detected? 

    YES: Perform diagnosis of applicable. Refer to "DTC DESCRIPTION ".

    NO: GO TO 2.

  2. 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 3.

  3. 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 "WITH ASCD MODELS: DIAGNOSIS PROCEDURE ".

      NO: GO TO 4.

  4. 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 "WITH ASCD MODELS: DIAGNOSIS PROCEDURE ".

      NO: INSPECTION END

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