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Home >> Infiniti >> 2011 >> QX56 AWD >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Engine Control System - Component Testing >> ASCD Brake Switch >> Component Function Check
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Component Function Check

  1. CHECK ASCD BRAKE SWITCH FUNCTION

    WITH CONSULT-III

    1. Turn ignition switch ON.
    2. Select "BRAKE SW1" in "DATA MONITOR" mode with CONSULT-III.
    3. Check "BRAKE SW1" indication under the following conditions.
      MONITOR ITEM CONDITION

      Monitor item Condition Indication
      BRAKE SW1 (ASCD brake switch) Brake pedal Slightly depressed OFF
      Fully released ON

    WITHOUT CONSULT-III

    1. Turn ignition switch ON.
    2. Check the voltage between ECM harness connector terminals as per the following.
      VOLTAGE SPECIFICATION

      ECM Condition Voltage (V)
      Connector + -
      Terminal Terminal
      E80 147 (ASCD brake switch signal) 175 Brake pedal Slightly depressed Approx. 0
      Fully released Battery voltage

      Is the inspection result normal? 

      YES: INSPECTION END

      NO: Go to "DIAGNOSIS PROCEDURE ".