Normal Operation
WARNING: This page is about a different car, the 2010 Mercury Mariner and 2010 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.
When the parking aid sensors detect obstructions in the path behind the vehicle, a variable rate warning tone is generated from a parking aid speaker. The parking aid speaker increases the warning tone rate as the vehicle gets closer to an obstacle. A fault condition occurs when the Parking Aid Module (PAM) detects an open, short to ground or short to voltage on the parking aid speaker circuits.
- DTC B1B52:12 (Rear Sounder-Park Aid: Circuit Short To Battery) - sets when the sounder circuit is shorted to voltage.
- DTC B1B52:14 (Rear Sounder-Park Aid: Circuit Short To Ground Or Open) - sets when the sounder circuit is open or shorted to ground.
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- PAM
- Parking aid speaker