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Home >> Mercury >> 2008 >> Milan Base, 3.0 1, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1485 (Information Center - Instrumentation, Message Center And Warning Chimes) >> Diagnosis And Testing >> Instrumentation, Message Center and Warning Chimes >> Pinpoint Tests >> Pinpoint Test AW: The SERVICE STEERING Message Is Inoperative/Always On >> Normal Operation

Normal Operation

WARNING: This page is about a different car, the 2010 Mercury Milan, 2010 Lincoln MKZ, and 2010 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.

The Instrument Panel Cluster (IPC) receives the Electronic Power Assist Steering (EPAS) system status from the Power Steering Control Module (PSCM) (part of the steering gear) through the High Speed Controller Area Network (HS-CAN) communication bus. When the PSCM  detects a fault in the EPAS system, the PSCM  sends a message to the IPC  to turn on the SERVICE STEERING message in the message center.

This pinpoint test is intended to diagnose the following: 

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