ServiceManual

ToC SERVICE MANUAL MARINE ENGINES
ELECTRICAL SYSTEM
06.10.05.06 Check oil pressure sensor "VDO-instrument"
(option B19)
NOTE: If oil pressure is questionable,
- check oil level before starting the engine.
- check minimum oil pressure.
Minimum oil pressure
Idle
1 bar
1000 2 bar
2500 and above 4 bar
Check minimum oil pressure:
Start engine and let engine run at idle speed, 1000
and 2500 r.p.m. Check tachometer and and oil
pressure gauge. Record oil pressure value for idle
speed, 1000 and 2500 r.p.m. If values are not
appropriate, check the oil pressure gauge before
checking the oil pressure sensor. To check the oil
pressure gauge, disconnect cable from sensor, turn
on ignition key and shortly put the sensor cable to
ground connection. If gauge functions properly, the
pointer will shortly deflect to high values. If there is no
malfunction of the gauge, replace the oil pressure
sensor.
Check of oil pressure sensor:
1. To check the oil pressure sensor, disconnect the
sensor cable and connect an ohmmeter to sensor
terminal and sensor.
2. Check resistance at zero pressure; resistance should
be 240 Ohm ± 10 %.
- If resistance is out of tolerance limits, replace the
oil pressure sensor.
- If resistance is within the tolerance range but
function of oil pressure sensor is still questionable,
measure the resistance over the entire field.
PRESSURE
10.05 ill.12
RESISTANCE (OHM)
Z001019/0_6_July 2008 Page ELECTRICAL SYSTEM - 91