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Home >> Mercury >> 2010 >> Milan Base, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 1055 (Automatic Transmission Cooler - (Hybrid)) >> Diagnostic Tests >> Transaxle Cooling >> Pinpoint Tests >> Pinpoint Test A: Motor Electronics Cooling System (MECS) Cooling Pump Fault >> Normal Operation

Normal Operation

WARNING: This page is about a different car, the 2008 Mercury Mariner and 2008 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.

The Motor Electronics Cooling System (MECS) pump is electrically driven and controlled by the PCM through the MECS pump relay. The PCM energizes the MECS pump relay by pulling the MECS pump output to ground when the ignition is in the ON position.

This pinpoint test is intended to diagnose the following:

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