Section 02 ENGINE
Subsection 08 (LUBRICATION SYSTEM)
PROCEDURES
OIL PRESSURE SWITCH (OPS)
Oil Pressure S
witch Operation
The oil pressure switch activates if engine oil
pressure falls between 180 kPa and 220 kPa
(26 PSI and 32 PSI).
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1. OPS
Oil Press
ure Switch Inspection
First, carefully check the condition of the connec-
tor terminals. Clean to remove dirt and corrosion
that could affect proper operation of the OPS.
IMPORTANT: Do not apply dielectric grease on
terminal.
Before ch
ecking the function of the OPS, an oil
pressure
test has to be performed to be sure the
oil press
ure is not in fault. Refer to
INSPECTION
in this s
ubsection.
When the engine oil pressure tests good but the
OIL message in the information center is present
and the beeper sounds:
–EnsureO
PS connector is plugged to the switch.
– Check the resistance of the OPS while engine
is off and while engine is running.
Oil Pressure Switch Resistance Test
Disconnect the connector from the OPS.
Use a mul
timeter to check the resistance as
shown.
ENGINE NOT RUNNING
TEST PR
OBES
RESIST
ANCE (
)
OPS
connec
tor
(pin 1)
Engine
ground
Closeto0(normally
closed switch)
ENGINE RUNNING
TEST PROBES RESISTANCE ( )
OPS
connector
(pin 1)
Engine
ground
Infinitely high (OL)
when pressure reaches
180 kPa (26.11 PSI) and
220 kPa (32 PSI)
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If resistance values are incorrect, replace OPS.
If the values are correct, check the continuity of
the wiring harness.
Oil Pressure Switch Circuit Continuity
Test
Disconnect the ECM connector A from the ECM.
Use the
ECM ADAPTER TOOL (P/N 529 036 166) and
a multimeter.
5290361
66
Check continuity of OPS circuit as per following
table.
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