2003-10:1 © Scania Industrial & Marine Engines 45
20. Every 1200 hours:
CHECKING THE OIL PRESSURE
SENSOR/MONITOR
Sensor function
Measure the output voltage from the sensor (pin 3) at different oil pressures.
The sensor should give the following readings:
0.85-1.15 bar = 2.45 volts
1.80-2.20 bar = 3.70 volts
2.75-3.25 bar = 4.50 volts
3.79-4.20 bar = 5.20 volts
4.55-5.45 bar = 5.70 volts
5.40-6.6 bar = 6.10 volts
The tolerance values apply at +30°C - 110°C. The tolerance range increases
at lower temperatures, e.g. 0°C = x 1.4.
Monitor function
Connect a test lamp to oil pressure monitor pin 4 (- earth) and check that the
monitor closes at the correct pressure when the engine is started and stopped.
The monitor should close at 0.7 ± 0.15 bar when the engine is stopped.
Important The sensor/monitor must be supplied with voltage when
measuring. Max. load 4 W from test lamp.
CHECKING THE OIL PRESSURE
MONITOR FOR DEC 2
Connect an ohmmeter or test lamp to the oil pressure monitor and check that
the monitor opens/closes at the correct pressure when the engine is started
and stopped. The monitor should open at 1.1 ± 0.15 bar when the engine is
started and close at 0.7 ± 0.15 bar when the engine is stopped.
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