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 COMPUTER RELEARN PROCEDURES
article in the GENERAL INFORMATION section before disconnecting battery.
Before proceeding with system diagnosis, the following precautions must be followed.
- When using SELF-DIAGNOSTICS for diagnosis, DO NOT skip any steps, or incorrect diagnosis may result. Always perform indicated verification procedure after repairs are made.
- When using a jumper wire, ensure either jumper wire or circuit is fuse-protected.
- Before disconnecting connector from any control module, ensure ignition is off before removing connector.
- When checking voltage or continuity at any control module, probe connector for control module from pin side. DO NOT backprobe connector or probe wires through the insulation.
- DO NOT cause short circuits when performing electrical tests. This will set additional Diagnostic Trouble Codes (DTCs), making diagnosis of original problem more difficult.
- Use specific test equipment as specified when performing electrical tests.