New Holland T8010 Manual page 1393

Engine Oil Pressure Sensor Signal Too Low
Cause:
The engine oil pressure sensor signal voltage is out of range low (the signal was below 0.25 volts for 1 second).
Possible failure modes:
1. Engine oil pressure sensor failed.
2. Engine oil pressure sensor wiring harness problems (open circuit, short to ground).
3. Instrument controller failure.
Solution
Check the engine oil pressure sensor resistance and the wiring from the instrumentation controller to the engine oil
pressure sensor.
1. Validate the pressure sensor power supply.
Open up the tractor hood and locate the engine oil pressure sensor.
Disconnect connector C216 from the engine oil pressure sensor.
Clean the connection. Clean the mating pin and connector. Inspect pin A, B, and C in the connector.
Measure the voltage at the supply input, pin B. It must be 5 volts.
If it is as specified, go to the next Step.
If not, then check for 5 volts out of the instrument controller pin 18 at connector 61.
If there is not 5 volts at the controller, then pull pin 18 terminal out to determine if 5 volts is present on the
controller pin when pin 18 wire is not connected.
NOTE: Use the correct tool to remove pins from connectors.
2. Check the sensor ground.
Measure the continuity between pin A of connector C216 to the chassis ground.
If there is good continuity (less than 1 ohm), go to the next step.
If there is not good continuity, go to step 4.
3. Check the function of the engine oil pressure sensor.
Validate that the sensor output voltage is greater than 0.25 volts at pin C of connector C216.
If not, then replace the engine oil pressure sensor.
If yes, then validate that output voltage is present at the instrument controller input pin 27 at connector 61. If
there is no voltage at the controller, then locate and repair an open circuit in the wire harness signal line.
4. Check the wiring from the engine oil pressure sensor connector C216 to the connector C061 at the instrument
controller.
There should be good continuity between pin A of C216 and the clean ground.
There should be good continuity between pin B of C216 and pin 18 of C061.
There should be good continuity between pin C of C216 and pin 27 of C061.
If there is any open circuit, check the continuity from C216 to C061 to locate the problem.
NOTE: Always inspect connector ends for damaged, bent or dislocated pins when troubleshooting.
NOTE: See schematic sections 24, 25 and 26 on the schematic poster.
Section 55 - Electrical System, Controller - Chapter 2
FAULT CODE INST 5011
55-2-8