Pinpoint Test C : DTC B1B44:12, B1B46:12, B1B48:12 Or B1B50:12: Notes
Diagnostic Overview
Diagnostics in this service information assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in Service Information for information about these practices.
Refer to Parking Aid, Parking Aid for schematic and connector information.
Normal Operation and Fault Conditions
The PAM supplies a reference voltage and signal return to rear parking aid sensors. A fault condition occurs when the PAM detects a short to voltage on the parking aid sensor signal circuit.
DTC Fault Trigger Conditions
| DTC | Description | Fault Trigger Conditions |
|---|---|---|
| B1B44:12 | Right Rear Outer Sensor: Circuit Short To Battery | A continuous and on-demand DTC that sets when the right rear outer parking aid sensor signal line is shorted to battery voltage. |
| B1B46:12 | Right Rear Inner Sensor: Circuit Short To Battery | A continuous and on-demand DTC that sets when the right rear inner parking aid sensor signal line is shorted to battery voltage. |
| B1B48:12 | Left Rear Outer Sensor: Circuit Short To Battery | A continuous and on-demand DTC that sets when the left rear outer parking aid sensor signal line is shorted to battery voltage. |
| B1B50:12 | Left Rear Inner Sensor: Circuit Short To Battery | A continuous and on-demand DTC that sets when the left rear inner parking aid sensor signal line is shorted to battery voltage. |
Possible Sources
- Wiring, terminals or connectors
- Parking aid sensor
- PAM
Visual Inspection and Diagnostic Pre-checks
Before disconnecting the PAM or the sensors, verify that the connectors are properly seated and latched.