Service Precautions
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 the COMPUTER RELEARN PROCEDURES
article in GENERAL INFORMATION before disconnecting battery.
Before proceeding with diagnosis, the following precautions must be observed.
- Vehicle must have a fully charged battery and functional charging system.
- Probe SBEC 60-pin connector from pin side. DO NOT backprobe SBEC connector.
- DO NOT cause short circuits when performing electrical tests. This will set additional fault codes, making diagnosis of original problem more difficult.
- Always repair lowest fault code number (CHECK ENGINE light) or first fault displayed (DRB-II) before repairing others.
- Always perform appropriate VERIFICATION TEST SP-VER after repairs are made.