Normal Operation

WARNING: This page is about a different car, the 2010 Lincoln MKX and 2010 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.

DTC U0155 (Lost Communication With Instrument Panel Cluster (IC ) Control Module) - an on-demand DTC that sets when the HCM does not receive communication from the IC .

This pinpoint test is intended to diagnose the following: