zd30 oil pressure guage setup

[Rumcajs]

Been told the zd30 only used simple on of switching for oil pressure.
So aftermarket is the only option.

Early Di motors did have that. On CrD version ECM does actually reads oil pressure from RHS unit (above starter motor) where the LHS unit (behind oil filter) is just for the warning light on the display....

If ECM reads/process the oil pressure it should in theory also supply that information via OBD2 interface however I can't confirm that and it is possible that the monitoring is just a "primitive" function checked and not the actual pressure processing. If anyone has an access to proper diagnostic scanner perhaps thay could see if such info is available.

From Nissan Australia learning academy:

Oil Pressure is monitored via the ECM with the utilisation
of an Oil Pressure Sensor which is located at the RH
rear of the engine.
In addition to the Oil Pressure Sensor there is an Oil
Pressure Switch located at the LH front of the engine,
above the oil filter. This switch will ground & illuminate
the ‘red oil can’ warning light when there is close to 0 Oil
Pressure.
The above mentioned Oil Pressure SENSOR is
connected directly to the ECM. If the ECM measures
specific pressures at certain engine speeds &
temperatures, the ECM will signal the Instrument Cluster
to illuminate the RED OIL CAN warning light on the
Instrument Cluster.
....ZD30 CRD Engine Oil Pressure Specifications.
Engine Oil Pressure measurements are to be taken from the RH Rear of the engine after the removal of the
Oil Pressure SENSOR. DO NOT confuse the Oil Pressure SENSOR with the Oil Pressure Switch located
on the LHF of the engine next to the Oil Filter.

Oil sender RHS) is the industry standard 3 wire resistor unit with positive coefficient or higher the pressure higher the output voltage in linear fashion.

Regards