Normal Operation
WARNING: This page is about a different car, the 2008 Ford RV Cutaway, 2008 Ford Econoline, 2008 Ford E450 Super Duty, and 2008 Ford Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
The system can be disabled by the parking aid switch. A 750 Hz variable 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.
- DTC C1742 (Sounder Circuit Failure) - is a continuous and on-demand DTC that sets if the parking aid module (PAM) senses a short to ground or an open on the rear sounder positive circuit 1437 (BK/PK), or rear sounder negative circuit 1438 (DG) when the speaker is off.
- DTC C1743 (Sounder Circuit Short to Battery) - is a continuous and on-demand DTC that sets if the PAM senses a short to voltage on the rear sounder negative circuit 1438 (DG) when the PAM is sending a signal to turn on the speaker.
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- PAM
- Parking aid speaker