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Home >> Infiniti >> 2022 >> QX80 Premium Select, RWD >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Control System (Diagnostics) (1 Of 2) >> Component/Circuit Diagnosis >> ASCD Brake Switch >> Component Function Check
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Component Function Check

  1. CHECK ASCD BRAKE SWITCH FUNCTION 

    SYMBOL 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

    SYMBOL 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 .