Engine Warm Up Cycle

The transmission shift points are modified after cold start to raise engine RPM during shifting. This allows for a faster engine warm up and reduction of catalyst warm up time. The TCM uses the transmission oil temperature information to determine the implementation of this function.

The warm up phase program will be terminated if any of the following conditions exist:

• The vehicle exceeds 25 MPH or
• Transmission oil temperature exceeds 60 Degrees Celsius or
• A Maximum of three minutes is exceeded.