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Home >> Ford >> 2012 >> Mustang Base, 2D Coupe, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 104 (Parking Aid System -- F250-F550 Super Duty) >> Diagnosis And Testing >> Parking Aid >> Pinpoint Tests >> Pinpoint Test G: The Audio Volume Does Not Reduce When The Parking Aid Tone Sounds >> Normal Operation

Normal Operation

WARNING: This page is about a different car, the 2012 Ford Pickup, 2012 Ford F550 Super Duty, 2012 Ford F450 Super Duty, and 2012 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.

When the parking aid system is active, a volume cutback request message is sent to the Body Control Module (BCM) from the Parking Aid Module (PAM) over the High Speed Controller Area Network (HS-CAN). The volume cutback request message is sent from the BCM over the Medium Speed Controller Area Network (MS-CAN) to the ACM to decrease the volume of the ACM while the parking aid warning sounds. The sounder increases its warning tone rate as the vehicle gets closer to an obstacle. When an object is detected within 30 cm (12 in) of the vehicle, the warning tone becomes continuous.

This pinpoint test is intended to diagnose the following: 

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