Normal Operation
WARNING: This page is about a different car, the 2014 Lincoln MKX and 2014 Ford Edge. However, it is still accessible from the selected car via links, so may be relevant.
The Body Control Module (BCM) fuse 18 (10A) supplies voltage to the Passive Anti-Theft System (PATS) transceiver. When the ignition is turned to the RUN or START position, 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.
- DTC B10D9:87 (PATS Transponder: Missing Message) - sets when the BCM does not receive a response from the PATS transceiver
This pinpoint test is intended to diagnose the following:
- Fuse
- Wiring, terminals or connectors
- PATS transceiver
- BCM