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.
Monitoring Systems and Cab Features