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Home >> Lincoln >> 2009 >> MKX FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1112 (Exterior Lighting System) >> Diagnostic Tests >> Adaptive Head Lighting >> Pinpoint Tests >> Pinpoint Test AD: DTC U0155 - Lost Communication With Instrument Panel Cluster (IC) Control Module >> Normal Operation

Normal Operation

WARNING: This page is about a different car, the 2007 Lincoln MKX and 2007 Ford Edge. However, it is still accessible from the selected car via links, so may be relevant.

The smart junction box (SJB) communicates the headlamps on status to the instrument cluster (IC) over the medium speed controller area network (MS-CAN). The IC acts as a gateway module and relays the information through the high speed controller area network (HS-CAN). The headlamp control module (HCM) receives headlamps on status information from the IC gateway. If the HCM does not receive communication from the IC, DTC U0155 is set.

This pinpoint test is intended to diagnose the following:

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