Vehicle Damage Warnings

VEHICLE DAMAGE WARNINGS
Before disconnecting any control module, make sure the ignition is "off'. Failure to do so could damage the module.

When testing voltage or continuity at any control module, use the terminal side (not the wire end) of the connector. Do not probe a wire through the insulation; this will damage it and eventually cause it to fail because of corrosion.

Be careful when performing electrical tests so as to prevent accidental shorting of terminals. Such mistakes can damage fuses or components. Also, a second code could be set, making diagnosis of the original problem more difficult.

ELECTRONIC PINION FACTOR WARNINGS
The pinion factor must be set for all new transmission control modules. If the pinion factor is not set or if it is set incorrectly, any speedometer, speed control, rolling door locks, and other devices that are operated by the powertrain and body controllers will not function properly.