Instrument Cluster
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.