DESCRIPTION & OPERATION
Input signals from sensors are sent to the Powertrain Control Module (PCM). The PCM controls shifts and converter clutch application. The PCM can also determine line pressure needed to optimize shift feel.
Five electronic solenoids accomplish the following functions
- 2 On/Off solenoids for shifting.
- One Pulse-Width Modulator (PWM) solenoid for Torque Converter Clutch (TCC) control.
- One Variable Force Style (VFS) Electronic Pressure Control (EPC) solenoid for line pressure control.
- One Variable Force Style (VFS) 3-2 timing/coast clutch solenoid to control release of coast clutch, coordinated release of the direct clutch, and apply of the low and intermediate band.
PCM has built-in self-diagnosis, fail-safe code and warning code display for the main input sensors and solenoid valves.
Description
Following procedures are functional tests of EEC-V system. These basic test steps must be followed in sequence to avoid misdiagnosis
- Visual Check
- Equipment Hookup
- KOEO (Key On Engine Off) SELF-TEST
- KOER (Key On Engine Running) SELF-TEST
After each service or repair procedure has been completed, repeat QUICK TEST to ensure all EEC-V systems work properly and DTC's are no longer present. Visual Check
Complete all steps in PRELIMINARY INSPECTION before proceeding to self-diagnostic tests. Ensure vacuum hoses and EEC-V wiring harnesses are properly connected.