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Home >> Infiniti >> 2024 >> QX55 Essential >> Repair and Diagnosis >> Accessories & Equipment >> Drivers Assistance Systems - ADAS >> Forward Emergency Braking (DTC/Circuit Diagnosis) >> DTC/Circuit Diagnosis >> Power Supply And Ground Circuit >> Diagnosis Procedure

Diagnosis Procedure

  1. CHECK FUSES 

    Check if any of the following fuses are blown:

    Signal name Fuse No.
    Ignition power supply 71

    Is the inspection result normal?

    >>

    GO TO 2.

    >>

    Replace the blown fuse after repairing the affected circuit if a fuse is blown.

  2. CHECK DISTANCE SENSOR POWER SUPPLY CIRCUIT 

    Check voltage between distance sensor harness connector and ground.

    Terminal Condition Voltage(Approx.)
    (+) (-)
    Distance sensor Ground Ignition switch
    Connector Terminal
    E59 1 OFF 0 V
    ON Battery voltage

    Is the inspection result normal?

    >>

    GO TO 3.

    >>

    Repair the distance sensor power supply circuit.

  3. CHECK DISTANCE SENSOR GROUND CIRCUIT 
    1. Turn the ignition switch OFF.
    2. Disconnect the distance sensor connector.
    3. Check for continuity between distance sensor harness connector and ground.
      Distance sensor Ground Continuity
      Connector Terminal
      E59 8 Yes

    Is the inspection result normal?

    >>

    Inspection End.

    >>

    Repair the distance sensor ground circuit.

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