The trans is controlled by the PCM. Powertrain control module. It's a very complex system, with sensors, solonoid's etc. You need to have the vehicles computer read for fault's at a good tran's shop. This will tell you where the fault actually lies? Let me know
DESCRIPTION & OPERATION
The center of the EEC-IV system is the Electronic Control Assembly (ECA). The ECA receives information from various sensors and switches. Based on information received, the ECA generates output signals to control engine and transmission operation. The EEC-IV system controls 3 major areas of engine operation: air/fuel mixture, ignition, and emission control. In addition. The system controls A/C compressor clutch operation, idle speed, and transmission solenoids. The system has self-diagnostic capabilities.
The engine control system consists of the ECA, sensors, switches, and solenoids. In order for the ECA to perform properly, it must be kept constantly informed of engine operating conditions. It is the task of the engine sensors to supply the ECA, via electrical signals, with specific information required to determine engine operating conditions. The ECA will then send out electrical signals to control air/fuel ratio, emission controls, idle speed, ignition timing, and transmission solenoids.
Friday, December 12th, 2008 AT 5:19 AM