Troubleshooting

78 RENR2696-01
Troubleshooting Section
The fuel injection pump detects one of the following
conditions whi
le the engine is running:
•
Supply voltage below normal
•
Intermittent signal
The ECM will lo
g the diagnostic code. The diagnostic
code may be viewed on the electronic service tool.
System Respon
se:
Possible Performance Effect:
The diagnostic code is logged, but there will be no
other system response.
•
There is no obvious effect on engine performance.
Troubleshoot
ing:
Further troubleshooting is required.
Perform the following diagnostic procedure: “Fuel
Injection Pump Circuit - Test”
Results:
•
OK – STOP.
i01798171
CID 1684 FMI 0
5 Fue l Injection
Pump, Invalid Pulse Widt h
Conditions Which Generate This Code:
The Electronic Control Module (ECM) detects the
following improper response from the fuel injection
pump.
•
Invalid “PWM” signal from the fuel injection pump
This invalid “PWM” is likely to be caused by a fault in
the CAN Data Link in either the ECM or in the fuel
injection p
ump.
The ECM will log the diagnostic code. The diagnostic
code may be v
iewed on the electronic service tool.
TheECMwillcausethefuelinjectionpumptostop
injecting f
uel. The ECM will then cause the engine to
shut down while the diagnostic code is active.
Troubleshooting:
A. Connect a test ECM in order to determine if
the problem is in the original ECM or in the fuel
injection pum
p.
Note: The parameters of the test ECM must match
the parameter
s in the suspect ECM. If the test ECM
resolves the problem, reconnect the suspect ECM.
Verify that the problem returns. If the problem returns,
replace the s
uspect ECM.
B. If the ECM is OK, contact the Perkins Technical
Support Cent
re in order to change the fuel
injection pump. The warranty of the fuel injection
pump will be affected if the pump is replaced
without prio
r consultation.
Replace the fuel injection pump. Refer to
Disassembl
y and Assembly, “Fuel Injection Pump
Remove and Install”.
C. Check for ac
tive diagnostic codes.
Results:
•
OK – STOP.
i01798172
CID 1684 FMI 07 Fuel Injection
Pump, Mechanical Fault
Condition
s Which Generate This Code:
This code is generated by the fuel injection pump.
The ECM will log the diagnostic code. The diagnostic
code may be viewed on the electronic service tool.
System Response:
The ECM wil
lcausethefuelinjectionpumptostop
injecting fuel. The ECM will then cause the engine to
shut down while the diagnostic code is active.
Possible Pe rformance Effect:
The engine
will shut down.
Troubleshooting:
Refer to Troubleshooting, “Fuel Injection Pump
Circuit - Test”.
Check for active diagnostic codes.