Perkins 1104E Series Troubleshooting Manual page 193

RENR2696-01
Illustration 105
Connections for the fuel injection pump control unit and VLPM
Note: This test is designed to measure the resistance
of the pump power supply by allowing a current to
flow through the supply circuit and measuring the
voltage drop.
A. Remove the following wires from the P20/J20
machine interface connector:
•
P20:48 + Machine Batt
•
P20:58 - Machine Batt
•
P20:42 Fuel Pump Power Control
•
P20:68 - Batt
B. Insert a resistor into the following "MIC" pin
connections:
•
P20:48
•
P20:58
C. Connect a switch to P20:42 and P20:68.
All connectors, pins, and sockets should be
completely coupled and/or inserted.
D. Connect a multimeter and ensure that the voltage
is 0 volts while the switch is in the "OPEN"
condition.
E. Turn the switch to the OFF position and record
the voltage.
Expected Result:
The resistance is less than 50 m ohms for a 12 V
application.
The resistance is less than 80 m ohms for a 24 V
application.
Results:
•
OK – STOP.
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Troubleshooting Section
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