Engine General Information and Diagnosis: 1A-7
Caution System Description
Z9J0111101003
The following four caution systems alert the operator when an abnormality occurs on the engine.
• OVER-REVOLUTION CAUTION
• LOW OIL PRESSURE CAUTION
• OVERHEAT CAUTION
• LOW BATTERY VOLTAGE CAUTION
Monitor-Tachometer
Lamp check / Buzzer Check
When the ignition key is turned to the “ON” position:
• Four Caution lamps turns on for two seconds.
• Caution buzzer sounds for two seconds.
Over-Revolution Caution System
Condition:
The ECM controlled over revolution limiter will engage at the engine speeds shown below. Once engaged it will initiate
an intermittent fuel injection signal to reduce engine speed.
Over revolution limiter
DF70 / 80: 6 200 r/min.
DF90: 6 400 r/min.
Action:
Reset:
Close the throttle to reduce the engine speed below approx. 3 000 r/min. for one second.
“A”: “REV LIMIT” lamp “C”: “TEMP” lamp
“B”: “OIL” lamp “D”: “CHECK ENGINE” lamp
“C” “B”
“D”
“A”
I9J011110004-02
Caution Type Caution Lamp Caution Buzzer Engine RPM Limited
Over-revolution Yes “A” No Yes
Low oil pressure Yes “B” (“A”) Yes Yes
Overheat Yes “C” (“A”) Yes Yes
Low battery voltage Yes “D” Yes No
Engine speed • Automatically reduced to approx. 3 000 r/min. by an intermittent fuel injection signal.
• If the operator decreases the engine speed below the over revolution system maximum
preset value, within 10 seconds, the over-revolution caution control will be canceled.
Caution lamp “REV-LIMIT” lamp lights continuously.
Caution buzzer No buzzer sounds.
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