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.

ROAD TESTING A COMPLAINT VEHICLE
Some complaints will require a test drive as part of the repair verification procedure. The purpose of the test drive is to try to duplicate the diagnostic code or symptom condition.

CAUTION: Before road testing a vehicle, be sure that all components are reassembled. During the test drive, do not try to read the DRB screen while in motion. Do not hang the DRB from the rear view mirror or operate it yourself. Have an assistant available to operate the DRB.

ELECTRONIC PINION FACTOR WARNING
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.

TRANSAXLE COOLER AND LINE FLUSHING
If there has been a mechanical failure within the torque converter or in the transaxle itself, the fluid becomes contaminated and circulates throughout the hydraulic system. This includes the cooler for the transaxle inside the radiator. The cooler and the lines connecting the cooler to the transaxle, must be flushed before being connected to the newly repaired or replaced torque converter or transaxle.

If the system is not flushed, the new components will become contaminated with the old fluid. The proper method for flushing is reverse flushing the system.