Table 38
Troubleshooting Test Steps
Values Results
1. Check that the latest available software is installed and
there are no applicable Technical Information Bulletins or Spe-
cial Instruction documentation released
A. Ensure that the latest software is installed on the engine ECM.
B. Ensure that the latest software is installed on the Dosing Control
Unit (DCU)
If necessary, refer to Troubleshooting, “ECM Software - Install” for
the correct procedure.
C. Ensure all Technical Information Bulletins and/or Special Instruc-
tion documented for the issue and/or product are reviewed and
followed.
Software and
Publications
Result: The latest software is not installed.
Repair: Install the latest engine ECM software and then
install the latest DCU software. If necessary, refer to Trou-
bleshooting, “ECM Software - Install” for the correct
procedure.
Start the engine and wait for 2 minutes.
If the fault is cleared, return the engine to service.
If the fault is still present, proceed to Test Step 2.
Result: Applicable Technical Information Bulletin/Special
Instruction publication is available.
Repair: Review and follow instructions provided in the
available publication.
Result: The latest software is installed.
Proceed to Test Step 2.
2. Check for Associated Diagnostic Codes
A. Connect to the electronic service tool.
B. Use the electronic service tool to check for active diagnostic
codes.
Check specifically for diagnostic codes relating to the DEF system.
Diagnostic
codes
Result: There are associated diagnostic codes.
Repair: Troubleshoot the associated diagnostic codes.
Refer to Troubleshooting, Diagnostic Trouble Codes or re-
fer to Troubleshooting, Event Codes.
Result: There are no associated diagnostic codes.
Proceed to Test Step 3.
3. Check the DEF Pressure
A. Connect to the electronic service tool
B. Start the engine.
C. Allow the engine to run for at least 2 minutes whilst monitoring
“DEF Pressure” on the electronic service tool.
Gauge
position
Result: The DEF pressure is less than 260 kPa (38 psi).
Repair: Troubleshoot the cause of low DEF pressure. Re-
fer to Troubleshooting, DEF Pressure Is Low.
Result: The DEF pressure is greater than 950 kPa
(138 psi).
Repair: Troubleshoot the cause of high DEF pressure.
Refer to Troubleshooting, DEF Pressure Is High.
Result: The DEF pressure is between 260 kPa (38 psi)
and 950 kPa (138 psi).
Repair: Allow the engine to run for at least 2 minutes.
If the DEF system primes successfully, and the 5392–31
E1370 (2) diagnostic is no longer active, return the engine
to service.
If the 5392–31 E1370 (2) diagnostic code is still active,
contact the Dealer Solutions Network (DSN).
102 UENR4469-36
Symptom Troubleshooting
Copyright of Perkins Engine Company Limited. NOT FOR REPRINTING OR RESALE
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