3-36 ENGINE CONTROL SYSTEM
LOW OIL PRESSURE CAUTION SYSTEM
CONDITION:
Immediate activation of system when the oil pressure switch is turned “ON” due to an engine oil pressure
drop below 100 kPa (1.0 kg/cm
2
, 14 psi).
ACTION:
RESET:
Stop engine and check engine oil level. Refill engine oil to the correct level if below the low oil mark.
If the engine oil level is correct, the following causes may be considered:
• Improper oil viscosity.
• Malfunctioning oil pressure switch.
• Clogged oil strainer or oil filter.
• Worn oil pump relief valve.
• Oil leakage from the oil passage.
• Excessive wear/damage of oil pump.
NOTE:
The low oil pressure caution system is reset when the oil pressure is restored to over 1.0 kg/cm
2
with approx.
3 000 r/min or less engine speed operation.
However, the engine must be stopped and checked immediately once the system is activated.
Engine speed Automatically reduced to approx. 3 000 r/min by intermittent fuel injection signal if the
system is activated at 3 000 r/min or higher.
Caution lamps “OIL” lamp lights continuously.
“REV-LIMIT” lamp lights continuously during engine speed rev-limiter activation.
Caution buzzer Sounds in a series of long (1.5 sec) beeps.
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