Pinpoint Test D : B10D9:87: Notes
WARNING: This page is about a different car, the 2017 Lincoln Navigator and 2017 Ford Expedition. However, it is still accessible from the selected car via links, so may be relevant.
Refer to Passive Anti-Theft System , for schematic and connector information.
Normal Operation and Fault Conditions
The BCM supplies voltage to the PATS transceiver. When the ignition changes to RUN or START, the BCM initiates the key interrogation sequence. The BCM starts the interrogation sequence by generating a signal and sending that signal to the transceiver on the transmit (TX) circuit. When the transceiver receives the signal from the BCM, it reads the PATS key and generates a challenge response to the BCM signal. The transceiver sends the challenge response back to the BCM on the receive (RX) circuit.
BCM DTC Fault Trigger Conditions
| DTC | Description | Fault Trigger Conditions |
|---|---|---|
| B10D9:87 | PATS Transponder: Missing Message | Sets when the BCM does not receive a response from the PATS transceiver. |
Possible Causes:
- Fuse
- Wiring, terminals or connectors
- PATS transceiver
- BCM
Visual Inspection and Diagnostic Pre-checks
- Verify the BCM fuse 18 (10A) is OK