
Probable Causes
• Diagnostic codes
• Air Intake
• Electrical connectors
• Fuel supply
• Switches
Recommended Actions
Note:
The procedures have been listed in order of
probability. Complete the procedures in order.
Table 30
Troubleshooting Test Steps
Values
Results
1. Diagnostic Codes
Note:
Certain diagnostic codes and/or event codes may cause
an engine shutdown.
A. Connect the electronic service tool and check for active codes
and for logged codes.
Codes
Result:
There are active codes.
Troubleshoot any active codes before continuing with this pro-
cedure. Refer to Troubleshooting, “Diagnostic Trouble Codes”
Result:
There are no active codes.
Proceed to Test Step 2.
2. Air Intake
A. Check the air filter for blockages or restrictions.
B. Check the air intake duct for blockages or restrictions.
Blockages or
restrictions
Result:
Blockages or restrictions found.
Make any repairs, as necessary.
Result:
The air intake system is OK.
Proceed to Test Step 3.
3. Electrical Connectors
A. Check for the correct installation of the ECM J1/P1 and the J2/
P2 connectors. Check for correct installation of the fuel injector
connectors.
Connectors
Result:
There are suspect connectors.
Repair connectors that are suspect or replace connectors that
are suspect.
Result:
There are no suspect connectors.
Proceed to Test Step 4.
(continued)
UENR0612
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