Toro Groundsmaster 7210, Service Manual

Page: 227 / 342

Engine Oil Pressure Switch
g035302
Figure 156
1. Engine oil pressure switch 2. Engine oil filter
The engine oil pressure switch is located on the engine near the oil filter ( Figure
156 ). The oil pressure switch is a normally closed switch that opens with oil
pressure.
The oil pressure switch opens from 40 to 60 kPa (5.8 to 8.8 psi).
The oil pressure switch is connected to the engine controller. If the switch closes
while the engine is running (indicating low oil pressure) the ECU will shut down
the engine. If the oil pressure switch failure is detected by the ECU, the engine
will transmit a fault and the fault will be displayed on the InfoCenter display.
Testing the Engine Oil Pressure Switch
Note: Refer to the Yanmar engine service manual for information regarding the
engine lubrication system and testing.
1. Park the machine on a level surface, lower the cutting deck, set the parking
brake, and shut off the engine.
2. Ensure that the key switch is in the O
FF
position.
3. Locate the engine oil pressure switch on the engine and disconnect the wire
harness connector from the switch.
4. Connect a multimeter (ohms setting) across the switch harness connector
terminals to check the continuity of the switch:
A. With the engine shut off, there should be no continuity between the
switch harness terminals.
B. With the engine running, there should be continuity between the switch
harness terminals.
5. If the testing determines that the oil pressure switch is not operating correctly,
check the pressure switch and/or pressure switch harness for continuity.
Repair or replace the components as necessary.
6. If the switch testing is correct and the circuit problem still exists, check the
machine wire harness; refer to the Electrical Schematics and Wire Harness
Drawings/Diagrams in Appendix A—Foldout Drawings.
Groundsmaster 7210 Page 5–31 Electrical System: Testing the Electrical Components
16222SL Rev C