Overheat Caution System - Suzuki DF 90 Service Manual

OVERHEAT CAUTION SYSTEM

CONDITION 1 (Maximum temperature)
Immediate activation of system when :
• Cylinder temperature reaches 121°C.
• Exhaust manifold temperature reaches 114°C.
CONDITION 2 (Temp. rise vs Time)
Immediate activation of system when :
• The average temperature difference during three consecutive 10 seconds measurement periods of the
cylinder temperature sensor at engine speeds of 500 r/min. or higher exceeds the limits as shown below.
Temperature range
86 °C ~ 99 °C
99 °C ~
• The average temperature difference during three consecutive 10 seconds measurement periods of the
exhaust manifold temperature sensor at engine speeds of 500 r/min. or higher exceeds the limits as shown
below.
Temperature range
80 °C ~ 95 °C
95 °C ~
ACTION :
Automatically reduced to approx. 3000 r/min. by intermittent fuel injection and ignition
Engine speed
signals if the system is activated at 3000 r/min. or higher.
"TEMP" lamp lights continuously.
Caution lamp
"REV- LIMIT" lamp lights continuously during engine speed rev-limiter activation.
Caution buzzer Sounds in a series of long (1.5 sec.) beeps.
RESET :
Close throttle to reduce engine speed below approx. 3000 r/min.
When cylinder temperature drops below the limits as shown below, the system resets. However, the system
may be activated again unless the cause for overheat (such as insufficient water) is removed.
Caution cause
Condition 1
(Maximum temperature)
Condition 2
(Temperature rise vs Time)
Temperature difference
Approx. 2.2 °C
Approx. 0.6 °C
Temperature difference
Approx. 9.6 °C
Approx. 1.4 °C
Reset temperature
Approx. 70 °C
Approx. 65 °C
ENGINE CONTROL SYSTEM 3-25