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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 AE: DTC C1278 - Steering Wheel Angle 1 and 2 Signal Faulted >> 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 headlamp control module (HCM) receives steering wheel angle information from the steering angle sensor module (SASM). If the HCM receives faulty steering wheel angle data from the SASM, DTC C1278 is set.

This pinpoint test is intended to diagnose the following:

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