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Home >> Mercury >> 2009 >> Mariner Base, 2.5 7, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 111 (Information Center - Instrument Cluster (Ic), Message Center, & Warning Chimes) >> Diagnostic Tests >> Instrument Cluster (Ic), Message Center And Warning Chimes >> Principles of Operation >> Instrument Cluster >> O/D OFF Indicator

O/D OFF Indicator

WARNING: This page is about a different car, the 2009 Mercury Grand Marquis and 2009 Ford Crown Victoria. However, it is still accessible from the selected car via links, so may be relevant.

The instrument cluster (IC) receives the overdrive off signal from the PCM over the HS-CAN. The overdrive off switch is hardwired to the PCM. When the transmission overdrive is turned off, the overdrive off switch provides a voltage signal to the PCM. The PCM, upon receipt of the overdrive off input signal, provides an overdrive off signal to the instrument cluster (IC) and the instrument cluster (IC) turns on the O/D OFF indicator.

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