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Home >> Infiniti >> 2017 >> QX80 Base, RWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (DTC/Circuit Diagnosis) (4 Of4) >> DTC/Circuit Diagnosis >> ASCD Brake Switch >> Component Function Check >> Diagnostic Test
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Diagnostic Test

  1. CHECK ASCD BRAKE SWITCH FUNCTION

    G-20 WITH CONSULT

    1. Turn ignition switch ON.
    2. Select "BRAKE SW1" in "DATA MONITOR" mode with CONSULT.
    3. Check "BRAKE SW1" indication under the following conditions.
      Monitor item Condition Indication
      BRAKE SW1
      (ASCD brake switch)
      Brake pedal Slightly depressed OFF
      Fully released ON

    G-21 WITHOUT CONSULT

    1. Turn ignition switch ON.
    2. Check the voltage between ECM harness connector terminals as per the following.
      ECM Condition Voltage (V)
      Connector + -
      Terminal Terminal
      E20 140
      (ASCD brake switch signal)
      152 Brake pedal Slightly depressed Approx. 0
      Fully released Battery voltage

    Is the inspection result normal?

    YES 

    INSPECTION END

    NO 

    Go to DIAGNOSIS PROCEDURE .