General System Description

CAUTION: Service of the instrument cluster is limited to replacement of the indicator and illumination bulbs, replacement of the tachometer gauge, and removal/replacement of the non-volatile odometer memory module (if the digital cluster is sent in for repairs). If the digital cluster is sent in for repairs, check with the repair facility for a list of the items that must be removed prior to sending the unit in for repairs.

When replaceing a speedometer or odometer assembly, the law requires that the odometer reading of the replacement unit to be set to register the same milage as the prior odometer. Check with state laws to insure proper compliance.

See the circuit referred to for the complete operation of an indicator and the other components that work with it. Only the indicators that do not appear in other schematics are described in this section.

The instrument cluster has a vacuum fluorescent (VF) digital display for the speedometer and the odometer. The gauge display functions are VF bar graphs. All the functions in the cluster are controlled by a solid state microprocessor.

The cluster may be programmed for different engine options and for different transaxle, some of which are not offered in 1985. The connections to the programed ground (PG) terminals shown in the schematic diagrams, accomplish these changes. The tachometer readings and red lines, the maximum speedometer readings, the shift indicator, and the "UNLEADED FUEL ONLY" display are affected by the PG grounds.