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Home >> Ford >> 2018 >> Taurus Limited, FWD, Gas >> Repair and Diagnosis >> External Pages >> Different car >> Section 124 (Perimeter Anti-Theft Alarm) >> Diagnosis And Testing >> Perimeter Anti-Theft Alarm >> Pinpoint Tests >> Pinpoint Test A : The Alarm System Does Not Activate From An Unauthorized Entry At The Hood

Pinpoint Test A : The Alarm System Does Not Activate From An Unauthorized Entry At The Hood

WARNING: This page is about a different car, the 2018 Ford EcoSport. However, it is still accessible from the selected car via links, so may be relevant.
  1. Refer to Remote Keyless Entry And Alarm for schematic and connector information.

    Normal Operation and Fault Conditions 

    Refer to: Perimeter Anti-Theft Alarm - System Operation and Component Description .

    Possible Sources 

    • Wiring, terminals or connectors
    • Hood latch
    • BCM

    Visual Inspection and Pre-checks 

    • Inspect the hood latch for damage.

  2. A1 MONITOR THE BCM (BODY CONTROL MODULE) HOOD AJAR SWITCH (HOOD_SW) PID (PARAMETER IDENTIFICATION)

    • Ignition ON.

    • Using a diagnostic scan tool, view the BCM Parameter Identifications (PIDs).

    • Using a diagnostic scan tool, monitor the BCM HOOD_SW PID.

    • Disconnect: Hood Ajar Switch C127.

    Does the PID read AJAR when the switch is disconnected? 

    Yes  INSTALL a new hood latch. Refer to: Hood Latch .
    No  GO to  A2

  3. A2 CHECK THE HOOD AJAR SWITCH INPUT CIRCUIT FOR A SHORT TO GROUND

    • Ignition OFF.

    • Disconnect: BCM C2280F.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C127-2
      GFD328531Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the resistance greater than 10, 000 ohms? 

    Yes  GO to  A3
    No  REPAIR the circuit.

  4. A3 CHECK FOR CORRECT BCM (BODY CONTROL MODULE) OPERATION

    • Disconnect and inspect all BCM connectors.

    • Repair:

      • corrosion (install new connector or terminals - clean module pins)
      • damaged or bent pins - install new terminals/pins
      • pushed-out pins - install new pins as necessary

    • Reconnect all BCM connectors. Make sure they seat and latch correctly.

    • Operate the system and determine if the concern is still present.

    Is the concern still present? 

    Yes  CHECK OASIS for any applicable service articles: TSB, GSB, SSM, or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, BCM Guided Routine Testing
    No  The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.
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