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Home >> Mercury >> 2002 >> Villager Base >> Repair and Diagnosis >> External Pages >> Different car >> Section 385 (Module Communications Network - F150 Pickup) >> Diagnosis And Testing >> Communications Network >> Pinpoint Test G: The Electronic Automatic Temperature Control (EATC) 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 Ford Pickup. However, it is still accessible from the selected car via links, so may be relevant.

The EATC module communicates with the diagnostic tool through the universal asynchronous receiver transmitter (UART)-based protocol (UBP) communications network circuit 1906 (VT). Check circuit 1906 (VT) between the EATC module C228b 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 an open in circuit 1906 (VT), damage to the DLC C251, damage to the EATC module C228b, or a problem in the in-line connector.

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