Group 30: Electrical system Malfunctions
21
Oil pressure (engine) warning
Fault indication
Tachometer:
The tachometer LCD screen will show a flashing oil
pressure icon and the alarm buzzer sounds.
Alarm display:
The oil pressure indication flashes in the alarm dis-
play + audible warning.
Circuit description
The oil pressure in the engine is monitored by a pres-
sure switch. The output signal from the pressure
switch can have two distinct positions, high/low, in the
same way as a relay output. A pre-set limit value de-
termines when the switch switches from one distinct
position to the other one. The switch is closed when
the oil pressure is low and when the engine is off. Pin
6 in the engine interface connector at the MDI pro-
vides the switch with a voltage signal.
Fault tracing
Fault conditions
The oil pressure switch closes at a oil pressure lower
than 60kPa (0.6bar).
The alarm is depended of the engine rpm.
<1000rpm: oil pressure switch closed for more than
30 seconds.
>1000rpm: oil pressure switch closed for more than
0.5 seconds.
Possible reason
• Low oil level.
• Short circuit between oil pressure switch supply
cable and battery negative.
• Faulty oil pressure switch.
Oil pressure switch
https://www.boat-manuals.com/
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