Pinpoint Test C : B10D7:87 Or B10D7:8F: Notes
Diagnostic Overview
Diagnostics in this service information assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods .
Normal Operation and Fault Conditions
When the ignition transitions to RUN or START, the BCM activates the transceiver to read the key in the ignition key cylinder. If the BCM does not receive a PATS key code or if the code is invalid, the PATS does not allow the engine does not start.
BCM DTC Fault Trigger Conditions
| DTC | Description | Fault Trigger Conditions |
|---|---|---|
| B10D7:87 | PATS Key: Missing Message | Sets when the BCM does not read a PATS key when the ignition transitions to RUN. |
| B10D7:8F | PATS Key: Erratic | Sets when the BCM receives a partial or corrupt PATS key read. |
Possible Sources:
- PATS key
- PATS transceiver
Visual Inspection and Diagnostic Pre-checks
- Inspect the PATS key for damage.
- Verify the correct key is used.