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Home >> Infiniti >> 2015 >> QX60 Base, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 116 (Engine Control System (DTC/Circuit Diagnosis) (VQ35DE) (Except Hybrid) (3 Of 3)) >> DTC/Circuit Diagnosis >> DTC P1572: ASCD Brake Switch >> DTC Logic >> DTC Confirmation Procedure

DTC Confirmation Procedure

WARNING: This page is about a different car, the 2016 Infiniti QX60. However, it is still accessible from the selected car via links, so may be relevant.

  1. INSPECTION START

    Do you have CONSULT?

    Do you have CONSULT?

    YES 

    GO TO STEP 2  .

    NO 

    GO TO STEP 5  .

  2. PRECONDITIONING

    If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at least 10 seconds before conducting the next test.

    NOTE:

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

    GO TO STEP 3  .

  3. PERFORM DTC CONFIRMATION PROCEDURE FOR MALFUNCTION A-I

    1. Start engine (VDC switch OFF).
    2. Select "DATA MONITOR" mode with CONSULT.
    3. Press MAIN switch and make sure that CRUISE lamp lights up.
    4. 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. 

      VHCL SPEED SE More than 30 km/h (19 mph)
      Selector lever Suitable position
    5. Check 1st trip DTC.

    Is 1st trip DTC detected?

    YES 

    Go to DIAGNOSIS PROCEDURE .

    NO 

    GO TO STEP 4  .

  4. PERFORM DTC CONFIRMATION PROCEDURE A-II

    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. 

      VHCL SPEED SE More than 30 km/h (19 mph)
      Selector lever Suitable position
      Driving location Depress the brake pedal for more than five 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

  5. PERFORM COMPONENT FUNCTION CHECK

    Perform component function check. Refer to COMPONENT FUNCTION CHECK .

    NOTE:

    Use component function check to check the overall function of brake pedal position switch. During this check, a DTC might not be confirmed.

    Is the inspection result normal?

    YES 

    INSPECTION END

    NO 

    Go to DIAGNOSIS PROCEDURE .

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