Engine Controller Diagnostic Port

Engine Diagnostic Switch Move switch (9) up and hold it there for more than two seconds to activate the engine diagnostic system. For more information, refer to “Troubleshooting, Engine Diagnostic Codes” in this section. Engine Controller Diagnostic Port Port (10) is used by maintenance trained personnel to diagnose and calibrate the ECM. Transmission Diagnostic Check Switch Transmission diagnostic check switch (11) is used by maintenance personnel to clear error codes in the electronic programmable transmission control unit (EPTC II) in the diagnostic mode. Transmission Diagnostic Scroll Switch Transmission diagnostic scroll switch (12) is used by maintenance personnel to scroll through the faults stored in the diagnostic mode of the EPTC II. 12 11 10 9 19 Operation Section Monitoring Systems and Cab Features TM5-2430-200-10