TOHATSU MFS25 Service Manual page 312

Accessories
r/min
4. Oil Pressure Warning
When Oil pressure is reduced below setting value during
operation, warning buzzer operates (generating continuous
sound), warning lamp is lit, and at the same time, low speed
ESG operates to reduce the speed to 2,800r/min or less.
• Reduce engine speed and run to safe place,
set main switch key to "OFF" to stop engine,
and then, check oil level and add oil if
necesssary. After adding oil, start engine and
check that warning lamp on the tachometer
and bottom cowl is not lit and warning buzzer
does not go on.
• Even after oil pressure returns to normal state,
engine speed control for oil pressure cannot
be cancelled unless engine is stopped.
• This warning is effective only for oil pressure
detection at oil pressure switch section, and is
not effective for overall oil pressure detection.
Sensor Detection Level
Reduction of oil pressure
5. Engine Trouble Warning
When water temperature sensor or MAP (manifold pressure)
sensor detects abnormality, warning lamp blinks, warning
buzzer operates (generating intermittent sound), and at the
same time, low speed ESG operates to reduce the speed to
2,800r/min or less
Sensor Detection Level
Engine Trouble
• Engine revolution is reduced to 2,800r/min,
warning lamp blinks and warning buzzer
sounds (generating intermittent sound).
1. Water temperature sensor defective
2. MAP sensor defective
3. Wire defective contact or disconnected
• Even after sensor returns to normal state,
engine speed control for malfunction cannot be
cancelled unless engine is stopped.
10-8
Speed Controlled to
2,800 r/min
Speed Controlled to
2,800 r/min
a Lamp is lit.
a Light blinks.
a
a
25/30 2006