General Information

- Perform the road test using the Scan Tool.
- Perform this test only when traffic and road conditions permit.
- Observe all traffic safety regulations.

Conduct the test according to the following steps:
1. Start the engine.
2. Depress the brake pedal.
3. Move the gear selector between the following positions:

Important: Transmission shifts should be immediate and not harsh.

- Park to Reverse
- Reverse to Neutral
- Neutral to D4

Use the scan tool in order to see if any transmission malfunction codes have been set. If so, refer to Functional Test Procedure. Functional Test After repairing the vehicle, perform the road test and verify that no codes have been set again.

If no codes have been set and the condition remains, refer to the DIAGNOSTIC TABLES. Symptom Related Diagnostic Procedures If the transmission is not performing well and no trouble codes have been set, check for an intermittent condition. Check all electrical connections for damage or a loose fit. Some scan tools have a snapshot test which can help to catch an intermittent condition that does not occur long enough in order to set a code.

If the condition is suspected to originate in the torque converter, refer to TORQUE CONVERTER CLUTCH DIAGNOSIS. Torque Converter Clutch Diagnosis