System Operation

Electrical System - 6F50 and 6F55

System Operation

System Diagram





The PCM (Powertrain Control Module) and its input/output network controls the following operations:
- Shift timing
- Line pressure (shift feel)

The transmission control is separate from the engine control strategy in the PCM (Powertrain Control Module), although some of the input signals are shared. When determining the best operating strategy for transmission operation, the PCM (Powertrain Control Module) uses input information from certain engine-related and driver-demand related sensors and switches.

In addition, the PCM (Powertrain Control Module) receives input signals from certain transmission-related sensors and switches. The PCM (Powertrain Control Module) also uses these signals when determining transmission operating strategy.

Using all of these input signals, the PCM (Powertrain Control Module) can determine when the time and conditions are right for a shift, or when to apply or release the TCC (Torque Converter Clutch). It will also determine the best line pressure needed to optimize shift engagement feel. To accomplish this, the PCM (Powertrain Control Module) uses output solenoids to control transmission operation.

Network Message Chart

Communication Message Chart