Fuel Injection Pump Circuit - Test - Perkins 1104E Series Troubleshooting Manual

178
Troubleshooting Section
2. Remove all jumpers and replace all connectors.
3. If the fault is eliminated with the test ECM,
install the suspect ECM and verify that the fault
returns.
4. If the fault returns replace the suspect ECM.
5. Verify that the repair eliminates the problem.
STOP.
Test Step 7. Bypass The Harness Wiring
Between The ECM And The Sensor
Connector.
A. Turn the keyswitch to the OFF position.
B. Disconnect the J1/P1connector for the ECM
harness, and the suspect sensor connector.
C. Remove the sensor signal wire from the P1 ECM
connector.
D. Remove the signal wire (positive terminal) from
the sensor connector on the engine harness.
E. Fabricate a jumper wire that is long enough to
reach from the ECM to the sensor connector with
Deutsch sockets on both ends.
F. Insert one end of the jumper into the ECM
connector. Insert the other end of the jumper into
the sensor connector of the engine harness.
G. Reconnect the connector for the ECM harness
and the sensor connector.
H. Turn the keyswitch to the ON position.
I. Use the electronic service tool in order to monitor
the "Active Diagnostic Code" screen for either the
open circuit diagnostic code for the sensor or the
short circuit diagnostic code for the sensor.
Expected Result:
The diagnostic code disappears when the jumper is
installed.
Results:
•
OK – There is a problem in the wiring harness.
Repair: Perform the following repair:
1. Repair the faulty wiring harness or replace the
faulty wiring harness.
2. Clear all diagnostic codes.
3. Verify that the repair eliminates the problem.
STOP.
•
Not OK – Restart this procedure and carefully
perform each step. STOP.
Fuel Injection Pump Circuit -
Test
System Operation Description:
Use this procedure under the following
conditions:
Note: The Bosch VP30 fuel injection pump is
installed on the engine at the factory. The pump is
not serviceable.
Use this procedure if another procedure has directed
you here. Also use this procedure if any of the
following diagnostic codes are active:
•
1684-04 Fuel Injection Pump supply voltage fault
•
1684-07 Fuel Injection Pump mechanical fault
•
1684-11 Fuel Injection Pump internal sensor fault
•
1684-14 Fuel Injection Pump no communications
•
174-02 Fuel Temperature Sensor erratic or
intermittent
• 342-02 Speed and Timing Sensor No.2 intermittent
signal
The following background information is related
to this procedure:
The fuel injection pump receives an electrical supply
from the OEM cables and from the relay for the
fuel injection pump through the Machine Interface
Connector (MIC).
The loss of power to the fuel injection pump can occur
on either the positive side or the negative side of the
pump. The positive side is supplied from the pump
power relay to the fuel injection pump. The positive
supply includes a fuse in order to protect the circuit.
The negative side is connected directly to the battery.
RENR2696-01
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