Neutral Tow Mode

Refer to: Emergency Park Position Release . for information on moving the transmission into N with the engine off or with a vehicle that will not crank.

Adaptive Tow/Haul 

On vehicles equipped with Adaptive Tow/Haul, the PCM determines if Tow/Haul is needed through a vehicle mass calculation. The vehicle mass calculation relies heavily on longitudinal acceleration information from the ABS module to determine if a trailer is connected and if that trailer is heavy enough to require the Tow/Haul function.

In order for the PCM to accurately calculate vehicle mass, the vehicle must be driven in a straight line (0 Yaw Rate), moving forward and with adequate acceleration. Once these conditions are met, the PCM begins calculating vehicle mass, which takes a minimum of five minutes to complete. This calculation becomes faster and more accurate over time as the PCM is able to use historical data to learn the vehicle mass and calculate changes to the mass more quickly.

If the PCM calculates a large enough increase in vehicle mass, Tow/Haul is enabled and the Tow/Haul indicator is illuminated. Since the vehicle must be driven in order for this calculation to take place, the Tow/Haul indicator will not be illuminated as soon as a trailer is connected, and not all trailers are heavy enough to require the Tow/Haul function.