174
OILING SYSTEM
OILING SYSTEM TESTS
Observe voltage at pin 2.
•
Voltage at pin 2 should drop as the oil pump
cycles.
Check the control signal while the
Oil Injector
test
is running. Set the digital multimeter to the Hertz
(Hz) scale.
•
Meter should read approximately 10 Hz.
Results:
•
If voltage and control signal readings at pin 2
are within range, the
EMM
and wiring are not at
fault.
•
If voltage at pin 2 is not within range, check volt-
age at pin 1 (white/red wire) of oil pump electri-
cal connector.
Connect positive meter lead to pin 1 (white/red
wire) of oil injection pump electrical connector.
Observe voltage at pin 1.
•
Voltage at pin 1 should be approximately 30 V.
Start the engine. Observe voltage at pin 1.
•
The voltage at pin 1 should be approximately
55 V.
•
If voltage is not within range, refer to
tion Pump Circuit Resistance Test
•
No voltage reading, refer to
Oil Injection Pump Circuit
Resistance Test
IMPORTANT:
The complete oil injection pump
electrical circuit includes
EMM
alternator output,
the engine wire harness, the injection pump wind-
ing and connectors, and the oil injector control cir-
cuit of the
EMM
. Check continuity of all wiring and
connections.
Disconnect the battery cables at the battery.
Disconnect J1-B connector from
EMM
. Use a digi-
tal multimeter with appropriate adapter leads to
measure the resistance between pin 23 (blue) of
the
EMM
J1-B connector and pin 1 (white/red) of
the oil injection pump connector. Calibrate the
meter to the LOW OHMS scale.
•
An infinite reading (
) indicates an open circuit.
Isolate the faulty component. Check continuity
of wiring, connections, or injection pump wind-
ing. Repair faulty wiring or replace faulty pump.
•
For a higher than expected reading, test resis-
tance of the injection pump. If injection pump
resistance reading is within range, injection
pump winding is good. Isolate faulty compo-
nent. Repair faulty wiring or replace faulty com-
ponent and retest.
Oil Injection Pump Circuit Resistance
2 to 3
1.
EMM
J1-B connector (pin 23)
2.
Oil injection pump connector (pin 1)
004343
1
2
Содержание E-TEC 200
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