WIRING DIAGRAMS
Page 2D-42 90-883728 JULY 2001
OVERHEAT
The overheat alarm message appears and the warning horn begins sounding continuously.
The Engine Guardian System will start limiting engine power.
If the engine overheats, immediately reduce throttle speed to idle. Shift engine into neu-
tral. Check for an obstruction covering the water intake holes on the engine.
NOTE: The throttle will have to be returned to idle to reset the system.
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a
a-Water Pump Indicator Hole
If no water is coming out of the water pump indicator hole or flow is intermittent, stop engine
and check cooling water intake holes for obstruction. If no obstruction is found, this may indicate
a blockage in the cooling system or a water pump problem. Operating the engine while over-
heated will cause engine damage.
If a steady stream of water is coming out of the water pump indicator hole and the warning
horn continues to sound, there still may be insufficient cooling water or an engine problem.
Operating the engine while overheated will cause engine damage.
NOTE: If you are in a stranded situation, stopping the engine and allowing it to cool back
down will usually allow some additional low speed (idle) running time before the engine starts
to overheat again.
The overheat problem must be corrected before you can resume normal operation.
PRESSURE
This alarm message is displayed and the warning horn begins sounding continuously to inform
the driver that there is insufficient water pressure in the cooling system. The Engine Guardian
System will start limiting engine power.
Some causes of insufficient cooling water pressure are (1) obstructed cooling water intake
holes (2) blockage in the cooling system or a water pump problem (3) running the engine with
the cooling water intake holes out of the water.
NOTE: The throttle will have to be returned to idle to reset the system.
0
1
2
3
4
5
6
7
a
a-Water Pump Indicator Hole
If the warning system is activated, immediately reduce throttle speed to idle. Shift engine into
neutral and check for a steady stream of water coming out of the water pump indicator hole.
If no water is coming out of the water pump indicator hole or flow is intermittent, stop engine
and check cooling water intake holes for obstruction. If no obstruction is found, this may indicate
a blockage in the cooling system or a water pump problem. Operating the engine without ade-
quate cooling water pressure will overheat the engine.
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