On Board Diagnostic (OBD), Function: Notes

The automatic transmission is controlled electro-hydraulically.

The term "On Board Diagnostic" is specifically for the electronic/electric control.

The automatic control module -J217- receives information from components that effect selection of gears and passes the information on to solenoid valves that control the valves in the valve body.

The control module is equipped with a Diagnostic Trouble Code (DTC) memory so that in the event of an electronic/electrical component failure or on open circuit the malfunction can be determined quickly. malfunctions are recognized by electrical signals and stored in the DTC memory.