Table 82
Troubleshooting Test Steps
Values Results
1. Diagnostic Codes
A. Establish communication between the electronic service
tool and the Electronic Control Module (ECM). Refer to Trou-
bleshooting, “Electronic Service Tools”, if necessary.
B. Use the electronic service tool to check for active or logged
codes.
Diagnostic
codes
Result: There are active or logged codes.
Repair: Troubleshoot any codes before continuing with this
procedure.
Result: There are no active or logged codes.
Proceed to Test Step 2.
2. ECM Parameters
A. Use the electronic service tool to verify that the correct en-
gine parameters are being used. Refer to Troubleshooting,
“Configuration Parameters” for additional information.
B. If applicable, verify that all parameters for any parasitic
loads are correct.
Parameters Result: The parameters are not configured correctly.
Repair: Correctly configure the parameters.
Verify that the configuration change eliminated the fault.
Result: The parameters are configured correctly.
Proceed to Test Step 3.
3. Accessory and/or Parasitic Loads
A. Check all accessory equipment for problems that may cre-
ate excessive load on the engine.
B. Check for any excess parasitic load on the engine.
Parasitic loads Result: There is an excessive load on the engine.
Repair: Diagnose and repair the fault.
Verify that the repair eliminated the fault.
Result: There is not an excessive load on the engine.
Proceed to Test Step 4.
4. Flash File
A. Verify that the latest flash file is installed in the Electronic
Control Module (ECM). Refer to Troubleshooting, “ECM Soft-
ware - Install” for the correct procedure.
B. Ensure all Technical Information Bulletins and/or Special
Instruction documented for the issue and/or product are re-
viewed and followed.
Flash file Result: The latest flash file is not installed in the ECM.
Repair: Install the latest flash file. Verify that the repair elimi-
nated the fault.
Result: Applicable Technical Information Bulletin/Special In-
struction publication is available.
Repair: Review and follow instructions provided in the avail-
able publication.
Result: The latest flash file is installed in the ECM.
Proceed to Test Step 5.
5. Throttle Signal
A. Use the electronic service tool and observe the throttle sig-
nal. Make sure that the throttle reaches the 100% raw posi-
tion and the calibrated position.
CAN data link Result: The throttle signal is erratic or does not reach the
100% raw position or the calibrated position.
Repair: Refer to the appropriate circuit test for the type of
throttle that is installed.
Result: The throttle signal is OK.
Proceed to Test Step 6.
(continued)
UENR4469-36 163
Symptom Troubleshooting
Copyright of Perkins Engine Company Limited. NOT FOR REPRINTING OR RESALE
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