FastLearn Procedure: Troubleshooting

WARNING: This page is about a different car, the 2007 GMC Sierra and 2007 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.

If FastLearn will not run and the above stated conditions have been met, ensure the following:

Transmission fluid temperature is between 40-100°C (104-212°F).
Closed throttle and engine at warm idle RPM
No active DTCs
All speed sensors are connected and functioning properly.
Internal mode switch is functioning properly
Main pressure is within specification.
TCC slip speed less than 100 RPM at idle in PARK/NEUTRAL