Mechanical Instrument Cluster (MIC)

INSTRUMENT CLUSTER (MIC)
The Mechanical Instrument Cluster (MIC) is divided into 4 sections. The primary gauges, (speedometer and tachometer) and secondary gauges (fuel level, oil pressure, water temp. and charging voltage), the CCD bus controlled indicator lights and the hardwired indicator lights. The gauge mechanisms are all the same, the only difference is the face plate or the physical size of the gauge. The ABS light and the left and right turn signals are hardwired and are not part of any actuator or self test. The PCM sends the signals necessary for the cluster to position the gauges. The cluster receives these messages directly off the bus and translates them into gauge positions. The BCM sends the status of all indicator lamps, the status and dimming level to the MIC over the CCD bus when the ignition is in the "run" or "start" positions. The check engine lamp status is sent to the BCM from the PCM over the CCD bus. The vacuum fluorescent (VF) odometer/trip display works with the key in the "run" or "start" positions. The BCM stores the mileage information that the odometer displays. If the bus is non-functional, the odometer will display dashes instead of the mileage numbers. The BCM sends the mileage message and the dimming level message to the VF at "key on". All the other MIC features work only when the ignition is in the "run" position.

Pushing and holding the trip/reset button for approximately 5 seconds with the ignition turned off will prompt the cluster to display its version level.

On transition from "run" to "start" a bulb-check feature is performed. This consists of activating all CCD controlled indicator lamps, the ABS lamp, and all VF display segments for approximately 2-4 seconds.