Electric Oil Pressure Gauge
Testing electric oil pressure gaugeTest values
Pressure (bar) Resistance (ohm)
0 approx. 10
1 approx. 69
2 approx. 129
3 approx. 184
Resistance values of pressure transmitter in dependance of prevailing pressure.
Note:
The oil pressure gauge is electrically controlled.
A pressure transmitter located in oil filter activates the indicator in instrument cluster.
With the ignition switched on, the indicator in instrument cluster is continuously connected to positive current. Negative is connected to indicator via pressure transmitter. With increasing pressure, the ohmic resistance of pressure transmitter increases and the readout is thereby changed.
If no oil pressure is indicated, the following checkup can be made for diagnosis "transmitter, line or indicator defective".
Testing
1 Switch on ignition, pull electric connection from transmitter (1-pole coupler, arrow).
Indicated nominal value 3 bar.
2 If readout is still 0 bar, test line from transmitter to indicator for ground connection. If line is in order, renew indicator.
3 If, with the ignition switched on and the engine stopped, the indicator shows continuously 3 bar, pull line from transmitter and connect with negative.
If readout is 0 bar, renew transmitter.
If readout remains at 3 bar, the line is interrupted.