V-MAC Co-Pilot Operator's Manual 15 Gauge Driver Module (GDM) The vehicle management and control (V-MAC) IV (GDM) is a black box controller used in the LEU and MRU model chassis. The GDM contains a warning light bar, an hour meter located in the tachometer and an odometer located in the speedometer. A separate push button is available to toggle through different functions such as to retrieve fault codes and view trip information. The GDM provides the following information:
Air Brake Application Air Cleaner Restriction Air Suspension Pressure Axle Oil Temperature Brake Wear Engine Coolant Temperature (ECT) (via engine control module (ECM)) Engine and Vehicle Speed Display Engine Exhaust Gas Temperature (EGT) Fuel Level High Beam Status High Engine EGT Engine Oil Pressure (via ECM) Primary and Secondary Air Pressure Speedometer and Tachometer Outputs Transmission Oil Temperature Vehicle Distance