Perkins 1104E Series Troubleshooting Manual page 194

194
Troubleshooting Section
•
Not OK – There is a problem with the fuel injection
pump. Contact the Perkins Technical Support
Centre in order to check if the software version
is correct. Also check that there have been no
software updates. If the problem still exists contact
the Perkins Tecnical Support Centre in order to
change the fuel injection pump. The warranty of
the fuel injection pump will be affected if the pump
is replaced without prior consultation. Replace the
fuel injection pump.
Repair: Refer to Disassembly and Assembly, "Fuel
Injection Pump Remove and Install".
STOP.
Test Step 11. Check the Voltage Load
Protection Module (VLPM)
Illustration 106
Voltage load protection module (VLPM) connections
Use this test in order to verify that the Voltage Load
Protection Module (VLPM) has the correct resistance.
Also use this procedure if there is a problem with a
blown fuse. A faulty Voltage Load Protection Module
(VLPM) may be the cause of the problem.
A. Measure the resistance between pin 1 and pin 2
of the Voltage Load Protection Module (VLPM).
B. Measure the resistance between pin 3 and pin 4
of the Voltage Load Protection Module (VLPM).
Expected Result:
The resistance should be less than 1 ohm between
pin 1 and pin 2.
The resistance should be less than 1 ohm between
pin 3 and pin 4.
The resistance should be greater than 1 ohm
between pin 2 and pin 3.
Note: The resistance between pin 2 and pin 3 may
differ. The resistance may be less than 1 ohm. This
is OK.
Results:
•
OK – STOP.
•
Not OK – There is a problem with the voltage load
protection module.
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