ENGINE OVERHEAT PROTECTION SYSTEM
1
Figure 57
Reference
Number
1
2
Engine Control Motor
3
4
5
When the engine coolant temperature increases to over 107°C (225°F), the sensor mounted in the coolant
line will send a signal to the instrument panel. A overheat signal is also sent to the e-EPOS controller and
the overheat warning buzzer will sound. The e-EPOS controller will send a signal to the engine throttle
controller and the engine speed is adjusted to standard mode. The engine throttle controller will signal the
engine control motor to decrease the engine speed.
When the coolant is overheated, the warning buzzer will sound, standard mode is selected and low engine
speed will be selected.
When the coolant temperature falls below 95°C (203°F), normal operation will resume.
S0802220K
Page 60
3
21
15
Engine overheat signal
Engine overheat signal
Description
Instrument Panel
Engine
Main Pump
Control Pump
(Pump control signal)
17
Reference
Number
10
E.P.P.R. Valve
15
Engine Throttle Controller
17
e-EPOS Controller
21
Warning Buzzer
5
10
ARS1130L
Description
Electrical System
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