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Home >> Lincoln >> 2008 >> MKX FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 377 (Module Communications Network System) >> Diagnosis And Testing >> Communications Network >> Pinpoint Test B: The Restraint Control Module (RCM) Does Not Respond To The Diagnostic Tool >> Normal Operation
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Normal Operation

WARNING: This page is about a different car, the 2006 Mercury Mariner and 2006 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.

The RCM communicates with the diagnostic tool through the international standards organization (ISO) 9141 communication network circuit 70 (LB/WH). If circuit 70 (LB/WH) becomes open or shorted to ground, communication to that module is not possible. Check circuit 70 (LB/WH) between the RCM C2041a and the data link connector (DLC) C251. Total resistance values must not be more than 5 ohms. If the resistance is more than 5 ohms there is an open in the ISO 9141 communication network circuit, damage to the DLC C251, or damage to the RCM C2041a.

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