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 partially controls transmission operation through two electronic On/Off solenoids for 3-4 shifting and torque converter clutch control. The PCM has built-in self-diagnosis, fail-safe code and warning code display for the main input sensors and solenoid valves.
NOTE:
In addition to transmission fault codes, engine related fault codes may be output during QUICK TEST
procedure. These fault codes pertain to engine performance and must be repaired first, as engine performance will greatly affect transmission operation. For information and testing procedures of engine related fault codes and components, see the appropriate TESTS W/CODES
article in the ENGINE PERFORMANCE section.