Recommended Actions
Table 88
Troubleshooting Test Steps
Values Results
1. Diagnostic Codes
A. Establish communication between the electronic service tool
and the Electronic Control Module (ECM) . Refer to Troubleshoot-
ing, “Electronic Service Tools”, if necessary.
B. Determine if a code is active or logged.
Diagnostic codes Result: A code is active or logged.
Repair: Troubleshoot any active codes before continu-
ing with this procedure.
Result: A code is not active or logged.
Proceed to Test Step 2.
2. ECM Flash File
A. Verify that the latest flash file is installed in the ECM.
Flash file Result: The latest flash file is not installed.
Repair: Install the latest flash file. Refer to Trouble-
shooting, “ECM Software - Install” for the correct proce-
dure. Verify that the repair eliminates the fault.
Result: The latest flash file is installed.
Proceed to Test Step 3.
3. Glow Plugs
Note: Faulty glow plugs will only affect the production of white
smoke when the ambient temperature is between 5° C (41° F)
and −25° C (−13° F).
A. Check operation of glow plugs. Verify that the glow plugs are
operating correctly. Refer to Troubleshooting, “Glow Plug Starting
Aid - Test”.
B. Check the configuration screen on the electronic service tool in
order to verify that ether injection is not enabled.
Glow plugs Result: The glow plugs are not operating correctly.
Repair: Make the necessary repairs. Verify that the re-
pair corrected the fault.
Result: The glow plugs are operating correctly.
Proceed to Test Step 4.
4. Ether Injection
Note: A faulty ether starting aid will only affect the production of
white smoke when the ambient temperature is below −25° C
(−13° F).
A. Use the electronic service tool to test the ether starting aid.
Glow plugs Result: The ether starting aid is faulty.
Repair: Test the ether system. Refer to Troubleshoot-
ing, “Ether Starting Aid - Test”.
Result: The ether starting aid is operating correctly.
Proceed to Test Step 5.
5. Coolant Temperature
A. Check that the water temperature regulator is operating cor-
rectly. Refer to Systems Operation, Testing, and Adjusting, “Water
Temperature Regulator - Test”.
Coolant
temperature
Result: The water temperature regulator is not operat-
ing correctly.
Repair: Replace the water temperature regulator. Veri-
fy that the repair corrected the fault.
Result: The water temperature regulator is operating
correctly.
Proceed to Test Step 6.
(continued)
176 UENR4469-36
Symptom Troubleshooting
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