Pinpoint Test E: The Alarm System Does Not Activate From The Intrusion Sensor
WARNING: This page is about a different car, the 2021 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.
- 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 .
DTC Fault Trigger Conditions
DTC Description Fault Trigger Condition BCM B109F:01 Intrusion Sensor Module: General Electrical Failure Sets when the BCM detects a short to ground from the intrusion sensor LIN circuit. BCM B109F:02 Intrusion Sensor Module: General Signal Failure Sets when the BCM detects a communication fault with the intrusion sensor. BCM B109F:08 Intrusion Sensor Module: Bus Signal/Message Failures Sets when the BCM detects a communication fault with the intrusion sensor. BCM B109F:97 Intrusion Sensor Module: Component Or System Operation Obstructed Or Blocked Sets when the intrusion sensor communicates to the BCM that it detects the motion sensor is blocked. BCM B109F:9A Intrusion Sensor Module: Component or System Operating Conditions Sets when the BCM detects a communication fault with the intrusion sensor. Possible Sources
- Fuse
- Wiring, terminals or connectors
- Intrusion sensor
- BCM
Visual Inspection and Pre-checks
- Inspect the BCM fuse 9 (5A)
- NOTE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
- E1 CHECK FOR VOLTAGE TO THE INTRUSION SENSOR
- Ignition OFF.
- Disconnect Intrusion Sensor C9800.
- Measure:
Positive Lead Measurement / Action Negative Lead C9800-1 Ground
Is the voltage greater than 11 volts?
Yes GO to E3 No VERIFY the BCM fuse 9 (5A) is OK. If OK, GO to E2
If not OK, REFER to the OEM WIRING DIAGRAMS to identify the possible cause of the circuit short. - E2 CHECK THE INTRUSION SENSOR VOLTAGE SUPPLY CIRCUIT FOR A OPEN
- Disconnect BCM C2280C.
Is the resistance less than 3 ohms?
Yes GO to E7 No REPAIR the circuit. - E3 CHECK THE INTRUSION SENSOR GROUND CIRCUIT FOR A OPEN
Is the voltage greater than 11 volts?
Yes GO to E4 No REPAIR the circuit. - E4 CHECK THE INTRUSION SENSOR LIN (LOCAL INTERCONNECT NETWORK) CIRCUIT FOR A SHORT TO VOLTAGE
- Disconnect BCM C2280E.
- Ignition ON.
- Measure:
Positive Lead Measurement / Action Negative Lead C9800-2 Ground
Is any voltage present?
Yes REPAIR the circuit. No GO to E5 - E5 CHECK THE INTRUSION SENSOR LIN (LOCAL INTERCONNECT NETWORK) CIRCUIT FOR A SHORT TO GROUND
- Ignition OFF.
- Measure:
Positive Lead Measurement / Action Negative Lead C9800-2 Ground
Is the resistance greater than 10, 000 ohms?
Yes GO to E6 No REPAIR the circuit. - E6 CHECK THE INTRUSION SENSOR LIN (LOCAL INTERCONNECT NETWORK) CIRCUIT FOR AN OPEN
Is the resistance less than 3 ohms?
Yes INSTALL a new intrusion sensor. REFER to: Intrusion Sensor . TEST the system for normal operation. If the concern is still present, GO to E7 No REPAIR the circuit. - E7 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, INSTALL a new BCM. REFER to: Body Control Module (BCM) . 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.