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Home >> Mercury >> 2010 >> Milan Base, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 1216 (Information Center - Instrumentation, Message Center And Warning Chimes) >> Diagnosis And Testing >> Instrumentation, Message Center and Warning Chimes >> Pinpoint Tests >> Pinpoint Test E: The Speedometer Is Inoperative >> Normal Operation

Normal Operation

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

The Instrument Cluster (IC) receives the vehicle speed signal from the PCM (non-hybrid) and from the Transmission Control Module (TCM) (hybrid) over the High Speed Controller Area Network (HS-CAN) communication bus. The PCM (non-hybrid) or TCM  (hybrid) receive the vehicle speed data from the Output Shaft Speed (OSS) sensor. The IC  monitors the vehicle speed input from the PCM or TCM  and commands the speedometer with a corresponding movement of the pointer.

If the IC  receives invalid vehicle speed data from the PCM/TCM  for 5 seconds or less, the IC  defaults the speedometer to the last setting, based upon the last known good vehicle speed message.

If the IC  does not receive the vehicle speed data from the PCM/TCM  , the IC  sets DTC U0100 (non-hybrid) or U0101 (hybrid) in continuous memory and defaults the speedometer to 0 km/h (0 mph).

If the IC  receives invalid data for more than 5 seconds, the IC  sets DTC U2197 and defaults the speedometer to 0 km/h (0 mph).

NOTE: If DTC U0100 is set in the IC  , other observable symptoms may be an inoperative tachometer, temperature gauge (non-hybrid) or odometer.

This pinpoint test is intended to diagnose the following: 

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