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Home >> Ford >> 2006 >> Focus ZX5 SE, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 271 (Instrument Cluster System) >> Diagnosis And Testing >> Instrument Cluster >> Pinpoint Tests >> Pinpoint Test D: The Tachometer Is Inoperative >> Normal Operation

Normal Operation

WARNING: This page is about a different car, the 2006 Mercury Grand Marquis and 2006 Ford Crown Victoria. However, it is still accessible from the selected car via links, so may be relevant.

The powertrain control module (PCM) uses the crankshaft position sensor to measure the engine rpm and sends the data to the instrument cluster, over the controller area network (CAN), to command the tachometer gauge. If the rpm information sent to the instrument cluster is invalid or missing, the instrument cluster defaults the tachometer to 0 rpm.

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