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Home >> Infiniti >> 2016 >> QX50 AWD >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System Diagnostic Trouble Codes (DTCS) (P0447-P2138) >> DTC/Circuit Diagnosis >> DTC P1572: Automatic Speed Control Device (ASCD) Brake Switch >> Component Inspection (Stop Lamp Switch) >> Diagnostic Test
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Diagnostic Test

  1. CHECK STOP LAMP SWITCH-I

    1. Turn ignition switch OFF.
    2. Disconnect stop lamp switch harness connector.
    3. Check the continuity between stop lamp switch terminals under the following conditions.
      Terminals Condition Continuity
      1 and 2 Brake pedal Fully released Not existed
      Slightly depressed Existed

    Is the inspection result normal?

    YES 

    INSPECTION END

    NO 

    GO TO STEP 2  .

  2. CHECK STOP LAMP SWITCH-II

    1. Adjust stop lamp switch installation. Refer to INSPECTION AND ADJUSTMENT .
    2. Check the continuity between stop lamp switch terminals under the following conditions.
      Terminals Condition Continuity
      1 and 2 Brake pedal Fully released Not existed
      Slightly depressed Existed

    Is the inspection result normal?

    YES 

    INSPECTION END

    NO 

    Replace stop lamp switch. Refer to EXPLODED VIEW WITH TORQUE SPECIFICATIONS .

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