Suzuki DF 30 - Low Oil Pressure Caution System; Overheat Caution System

ENGINE CONTROL 3-13
LOW OIL PRESSURE CAUTION SYSTEM
The low oil pressure caution control activates when internal engine oil lubricating pressure is 49kPa (0.5 kg/
cm
2
) or lower, during engine operation.
When the oil pressure is higher than the preset value of 49kPa (0.5 kg/cm
2
), the oil pressure switch is OFF (no
continuity).
When the oil pressure decreases below this preset value, the oil pressure switch is on (continuity) and the low
oil pressure caution activates.
The low oil pressure caution control operates as follows.
• The caution lamp turns on.
• The caution buzzer sounds. (Remote control model)
• If the engine speed is higher than 3000 r/min, the over-rev caution control activates. This interrupts the
ignition and automatically lowers engine speed to approximately 3000 r/min.
To cancel the low oil pressure caution control,
immediately stop the engine and check that engine oil level is at the specified level.
If insufficient, replenish.
NOTE:
If the low oil pressure caution control has activated with engine oil filled to the specified level, check for
abnormal condition in the low oil pressure caution circuit, leakage in the oil passages, and worn or damaged
oil pump.
OVERHEAT CAUTION SYSTEM
The overheat caution activates when the cylinder wall temperature sensor has detected any of the following
conditions.
• Cylinder wall temperature is at 98 – 110
°
C (208 – 230
°
F) or higher.
• The rate of cylinder wall temperature variation within a given time exceeds the preset rate.
When the overheat caution control activates, the following conditions occur.
• The caution lamp turns on.
• The caution buzzer sounds. (Remote control model)
• If the engine speed is higher than 3000 r/min, the over-rev caution control activates. This interrupts the
ignition and automatically lowers engine speed to approximately 2000 r/min.
To cancel the overheat caution control,
the cylinder wall temperature must be reduced to less than 70°C (158°F) and, at the same time, engine
speed must be decreased to 1500 r/min. or lower.