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Home >> Ford >> 2012 >> Mustang Base, 2D Coupe, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 402 (Parking Aid System) >> 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 2013 Ford F-550 Super Duty, 2013 Ford F-450 Super Duty, 2013 Ford F-350 Super Duty, and 2013 Ford F-250 Super Duty. 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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