202
OILING SYSTEM
COMPONENTS
Oil Pressure Sensor
The oil pressure sensor reacts to changes in oil
manifold pressure. The EMM supplies and moni-
tors electrical current to the sensor.
The sensor provides an output voltage to the
EMM based on oil manifold pressures.
Oil Pressure Sensor Information:
The EMM monitors the oil pressure sensor’s elec-
trical circuit. If circuit voltage is beyond the speci-
fied range (< 0.12 V, > 4.88 V), the EMM:
If oil pressure is below expected range (< 0.5 V),
the EMM:
If oil pressure is above expected range (> 4.5 V),
the EMM:
Refer to Oil Pressure Sensor on p. 99.
Electrical Circuit (55 V)
The oil injector is powered by the 55 V electrical
circuit. The EMM controls injection pump opera-
tion by opening and closing the circuit’s ground.
Circuit components:
• Oil injection pump winding
• Main wire harness and connections
• EMM, oil injection pump control function
• System voltage (55 V): stator, rectifier/regulator
(EMM)
• Ground circuits, EMM and oil injection pump
Refer to Oiling System Electrical Diagram on
p. 204 and OILING SYSTEM TESTS on p. 218.
The EMM monitors the oil injection pump electri-
cal circuit. If circuit voltage is beyond the specified
range (open circuit), the EMM:
1. Oil pressure sensor 005371
5 VDC Input on RED wire
0.5 - 4.5 V Output on TAN / WHITE wire
Ground on BLACK wire
Stores a service code 71
Initiates EMM SENSOR FAULT (LED 3)
Stores a service code 72
Initiates EMM SENSOR FAULT (LED 3)
Stores a service code 73
Initiates EMM SENSOR FAULT (LED 3)
1
Activates S.A.F.E.
Initiates and stores a service code 34
Initiates
EMM NO OIL/OVERHEAT FAULT (LED 4)
Initiates the SystemCheck or I-Command “NO
OIL” warning
Stored Faults Review Screen 005143
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