Quick Test
- As a quick diagnosis, instrument cluster will perform a function check immediately after ignition is switched to RUN/START position. Electronic display, odometer/transmission range indicator and all warning lights EXCEPT low fuel, cruise, high beam, fog lamps and turn signal will light for a brief period.
- If cluster is not receiving CCD bus messages, cluster will appear non-functional except for the continuously illuminated air bag indicator and NO BUS message displayed. If instrument cluster in not receiving CCD bus messages, see VEHICLE COMMUNICATIONS in BODY CONTROL COMPUTER article in the ACCESSORIES/SAFETY EQUIPMENT section.
CAUTION:
When battery is disconnected, vehicle computer and memory systems may lose memory data. Driveability problems may exist until computer systems have completed a relearn cycle. See COMPUTER RELEARN PROCEDURES article in the GENERAL INFORMATION section before disconnecting battery.