Output Diagnostic Test Mode (Circuit Actuation Tests)

The Circuit Actuation Test Mode (ATM) is used to check out specific component systems.
1. When Code 55 is displayed, depress ATM button on tool to activate display.
2. If a specific ATM is desired, hold ATM button down until desired test code is displayed. The computer will continue to turn the selected circuit on and off for as long as five minutes or until ATM button is depressed again or if ignition switch is turned off. If ATM button is not pressed again, the computer will continue to cycle the circuit for five minutes before shutting system off. Shutting ignition switch off will also shut test mode off.