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Home >> Mercury >> 2001 >> Cougar S >> Repair and Diagnosis >> External Pages >> Different car >> Section 1570 (Module Communications Network) >> Diagnosis And Testing >> Communications Network >> Pinpoint Test S: The Parking Aid Module Does Not Respond To The Diagnostic Tool >> Normal Operation
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Normal Operation

WARNING: This page is about a different car, the 2005 Lincoln LS. However, it is still accessible from the selected car via links, so may be relevant.

The parking aid module communicates with the diagnostic tool through the universal asynchronous receiver-transmitter (UART)-based protocol (UBP) communications network circuit 4-GN10 (GY). If circuit 4-GN10 (GY) becomes open or shorted to ground, communications to that module is not possible. Check circuit 4-GN10 (GY) between the parking aid module C4014b and the data link connector (DLC) C251. The total resistance value must not be more than 5 ohms. If the resistance is more than 5 ohms, there is either an open in circuit 4-GN10 (GY), damage to the DLC C251, damage to the parking aid module C4014b, or a problem in the in-line C213 or joint connector No. 1 C261.

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