Instruments and Controls Identification While driving, the overspeed light will flash on if the driver exceeds a second predetermined speed set by the customer. Engine Functions The system monitors engine coolant temperature, coolant level, and oil pressure. The system also controls several functions such as headlight high beam indicator ( Fig. 2.23 ), low air pressure warning light and alarm, and control for four optional features. The optional features can be any combination of the following or any four that are spe- cially ordered: If the engine overheats, a warning light comes on and a buzzer sounds.
The temperature that triggers the warning light and buzzer varies with engine type and is programmed into the system at the factory. If the temperature contin- ues to rise to critical levels, the engine shut- down light comes on, and the engine will be shut down. transmission temperature axle temperature engine heater If the coolant level drops below a sensor in the cooling system, the low water level light comes on, and a buzzer sounds. After 30 seconds, the system will shut down the engine. The low coolant shutdown feature may be turned on or off by setting a DIP switch in the control mod- ule.
alternator no charge fifth wheel lock parking brake sand antilock If the oil pressure drops below a preset level, the low oil pressure light comes on and a warning buzzer sounds. If the oil pressure drops to a preset critical level, the engine shut- down light comes on, and the engine will be shut down. mirror heater utility lights axle lock sludge ejector All shutdown features have an automatic over- ride. If the vehicle needs to be moved to a safe location after a shutdown, just crank the en- gine. It will run for about 30 seconds before shutting down again.
Additional Features When the ignition is turned on, all the LEDs in the lightbar will light and the low air and low oil pressure alarms will sound. The lights and alarms will activate for two one-second periods, separated by a half- second pause. This is a self-test to indicate whether or not the lightbar is working. After the test, the LEDs not in use will turn off. The low air and oil pressure warnings will not sound again until the starter is cranked. Once the starter is cranked, the alarms will sound until system air and oil pressures reach mini- mum levels. If the lightbar doesn’t operate as de- scribed here, test it.
For instructions, see Group 54 of the Heavy-Duty Trucks Service Manual. Turn Signal Functions The system operates the turn signal relay and the in- dicators. Other Functions The system also controls several functions such as the headlight high beam indicator, low air pressure warning light and intermittent buzzer, dimming of the turn signal indicators when the headlights are turned on, and control of indicators for six optional features ( Fig. 2.22 ). The optional features can be any combi- nation of the following:
Kysor Vehicle Instrumentation and Protection (VIP) System, Optional transmission temperature The Kysor VIP system is an electronically controlled warning and engine shutdown system. It also con- trols the turn signal functions and various optional functions. A solid state lightbar ( Fig. 2.22 ) in the in- strument panel contains displays for the functions. axle temperature engine heater alternator no charge 2.19