Engine Control System - Overheat Caution System

CONDITION 1

Immediate activation of the system when:
Cylinder temperature reaches 111°C.
Exhaust manifold temperature reaches 101°C.

CONDITION 2

Immediate activation of the system when:
The average temperature difference during three consecutive 10 seconds measurement periods of the cylinder temperature sensor at engine speeds of 500 rpm/min or higher exceeds the limits as shown below:

Temperature Range	Temperature Difference
Approx. 2.2°C	Approx. 0.6°C

The average temperature difference during three consecutive 10 seconds measurement periods of the exhaust manifold temperature sensor at engine speeds of 500 rpm/min or higher exceeds the limits as shown below:

Temperature Range	Temperature Difference
Approx. 9.6°C	Approx. 1.4°C

Engine Speed:

Caution lamp
Caution buzzer
Automatically reduced to approx. 3,000 rpm/min by intermittent fuel injection and ignition signals if the system is activated at 3,000 rpm/min or higher.

TEMP lamp: Lights continuously.

REV-LIMIT lamp: Lights continuously during engine speed rev-limiter activation.

Sounds: In a series of long beeps.

Close the throttle to reduce the engine speed below approx. 3,000 rpm/min.

When the cylinder temperature drops below the limits as shown below, the system resets. However, the system may be activated again unless the cause for overheat is removed.