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Home >> Mercury >> 2010 >> Milan Base, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 942 (Instrument Cluster System) >> Diagnostic Tests >> Instrument Cluster >> Pinpoint Tests >> Pinpoint Test S: The O/D OFF Indicator Is Never/Always On (Escape, Mariner) >> Normal Operation

Normal Operation

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

The overdrive (O/D) off function is controlled by the O/D off switch. When the O/D off switch is pressed, the O/D off switch provides a ground to the powertrain control module (PCM). The O/D off status is then transmitted to the instrument cluster from the PCM over the communication network.

Possible Causes