Description & Operation: Notes
Input signals from sensors are sent to the Powertrain Control Module (PCM). The PCM can determine when the time and conditions are right for a shift or converter clutch application.
The PCM controls transmission operation through 6 electronic solenoids. Three On/Off solenoids for shifting. One Pulse-Width Modulator (PWM) solenoid for Torque Converter Clutch (TCC) control. One Electronic Pressure Control (EPC) solenoid for line pressure control. One Coast Clutch Solenoid (CCS) to control apply and release of coast clutch. The PCM has built-in self-diagnosis, fail-safe code and warning code display for the main input sensors and solenoid valves.
NOTE:
For engine-related DTCs, see appropriate TESTS W/CODES article in ENGINE PERFORMANCE. These DTCs pertain to engine performance and must be repaired first, as engine performance and related component signals will affect transmission operation and diagnosis.