Road Test Procedure

Road Test Procedure

Important: The Road Test Procedure should be performed only as part of the Symptom Diagnosis. Refer to Diagnosis by Symptom.

The following test provides a method of evaluating the condition of the automatic transmission. The test is structured so that most driving conditions would be achieved. The test is divided into the following parts;
^ Electrical Function Check
^ Upshift Control and Torque Converter Clutch (TCC) Apply
^ Part Throttle Detent Downshifts
^ Full Throttle Detent Downshifts
^ Manual Downshifts
^ Coasting Downshifts
^ Manual Gear Range Selection
- REVERSE
- Manual FIRST
- Manual SECOND
- Manual THIRD

Important: Complete the test in the sequence given. Incomplete testing cannot guarantee an accurate evaluation.

Before the road test, ensure the following:
^ The engine is performing properly.
^ Transmission fluid level is correct.
^ Tire pressure is correct.

During the road test:
^ Perform the test only when traffic conditions permit.
^ Operate the vehicle in a controlled, safe manner.
^ Observe all traffic regulations.
^ View the scan tool data while conducting this test. Take along qualified help in order to operate the vehicle safely.
^ Observe any unusual sounds or smells.

After the road test, check the following:
^ Transmission fluid level.
^ Diagnostic Trouble Codes (DTCs) that may have set during the testing. Refer to the applicable DTC.
^ Scan tool data for any abnormal readings or data.