Usage:
NOTE: The following procedure should only be used once the problem has definitely been determined to be Intermittent. Otherwise, refer to Section 5 of the 3406C Diesel Truck Engine Electronic Troubleshooting Guide, Form No. SENR5503, to isolate an Active problem.
Complete Steps 2 through 12
Each step will eliminate one subsystem (complete all steps).
Fill out a copy of the Unrepeatable Test Status Checklist at the back of this manual.
Return the truck to service with copies of both the Driver Questionnaire and the Unrepeatable Test Status Checklist.
Interview the driver once the truck returns.
If the problem is gone, work backwards using the Diagnosis and Action When Truck Returns column to determine which step has eliminated the problem.