Output State Diagnostic Test Mode (DTM) Description

The output state diagnostic test mode aids in servicing the output actuators associated with the Electronic Engine Control (EEC-IV) system. It enables the technician to ENERGIZE and DE-ENERGIZE most of the system output actuators on command. This mode is entered after all codes have been outputted during the Key On Engine Off (KOEO) and continuous testing. At this time, leave the self test activated and go to wide open throttle. Each time the throttle is depressed, the actuators will change state (ON/OFF). This procedure generally is used only when called for in one of the pinpoint tests to determine if an actuator is operating properly.