Transmission Control Module: Notes

The Transmission Control Module (TCM) receives information from various input devices and uses this information to control shift and lock-up control solenoid valves. See Fig 1 . The TCM contains self-diagnostic system, which stores fault code if failure or problem exists in transaxle electronic control system. The fault code may be retrieved to determine transaxle problem area. See SELF-DIAGNOSTIC SYSTEM  . Fault code may also be referred to as Diagnostic Trouble Code (DTC). The TCM is located behind drivers side of instrument panel. See Fig 2 .