Instrument cluster consists of electronic analog gauges, various warning lights, and optional tachometer. See Fig. 1 . Vehicles equipped with tachometer have an electronic vacuum fluorescent transmission range indicator (PRND3L), odometer and trip odometer display. Vehicles without tachometer are equipped with a cable-operated transmission range indicator.
Instrument cluster is equipped with the following warning lights:
Battery voltage.
Cruise (speed control).
Door ajar.
Fasten seat belt.
Lift gate ajar.
Low fuel level.
Low windshield washer fluid level.
Traction Control.
The Body Control Module (BCM), which receives input from various sensors, sends display information to instrument cluster and operates gauges. Instrument cluster incorporates a self-test diagnostic feature to identify electronic problems. BCM, Powertrain Control Module (PCM), and Transmission Control Module (TCM) are continuously monitored by the diagnostic system.
Fig. 1: Identifying Instrument Cluster Components
Jan 19, 2009 at 5:55 PM
