Subsection 04 (LUBRICATION SYSTEM)
OIL PRESSURE SWITCH (OPS)
Oil Pressure Switch Access
Remove OPS cover.
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Oil Pressure Switch Activation
The oil pressure switch activates when the engine
oil pressure is lower than following specified pres-
sure range.
OIL PRESSURE SWITCH ACTIVATION RANGE
30 kPa ± 10 kPa (4.35 PSI ± 1.45 PSI)
To check the function of the oil pressure switch,
an oil pressure test has to be performed. Refer to
ENGINE OIL PRESSURE
in this subsection.
If the engine oil pressure is good, perform the oil
pressure switch resistance test.
Testing the Oil Pressure Switch
Resistance
Disconnect the connector from the oil pressure
switch.
Check resistance as per following tables.
OPS
CONNECTOR
ENGINE
ENGINE NOT
RUNNING
PIN
RESISTANCE ( )
1
Engine
ground
Close to 0
(normally closed
switch)
OPS
CONNECTOR
ENGINE
ENGINE RUNNING
PIN
RESISTANCE ( )
1
Engine
ground
Infinite (open) when
pressure reaches
30 kPa ± 10 kPa
(4.35 PSI ± 1.45 PSI)
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If resistance values are incorrect, replace the oil
pressure switch.
If the values are correct, check wiring.
Removing the Oil Pressure Switch
Unplug the oil pressure switch connector.
Unscrew and remove oil pressure switch.
Installing the Oil Pressure Switch
Apply required service product on threads of oil
pressure switch.
Tighten oil pressure switch to specification.
TIGHTENING TORQUE
Service product
LOCTITE 243 (BLUE)
(P/N 293 800 060)
Oil pressure switch
12 N•m ± 1 N•m
(106 lbf•
in
± 9 lbf•
in
)
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