TM 9-2350-277-34INTRODUCTION TO HOW TO USE TROUBLESHOOTING 0005 00PURPOSEThe purpose of direct and general support maintenance level troubleshooting is to diagnose carrier problems which arereported to direct and general support maintenance. Troubleshooting tasks in this manual are common to all M113A3 FOVcarriers except where indicated. You should not begin direct and general support maintenance troubleshooting until alloperator and unit troubleshooting has been completed. You will perform four actions in direct and general supportmaintenance troubleshooting:Before starting a troubleshooting task, verify that reported problem is present in carrier.After verifying the symptom, find the part that is causing problem.Replace or adjust that part.Check to make sure problem no longer exists, and that there are no other problems.DEFINITIONS AND DESCRIPTIONS OF TROUBLESHOOTING PARTSTroubleshooting tasks always have a beginning and an end. You will use task steps, test procedures, indexes, maintenancetasks, and other technical manuals to troubleshoot. Troubleshooting uses the following terms that are not used in other kindsof tasks:FAULT:The part that is not operating correctly and is causing the problem.SYMPTOM:The problem reported by unit maintenance.VERIFY NO FAULTSFOUND:After you have completed the corrective action, you must verify that no faults exist.If the fault condition still exists, then the fault is not fixed or there is another fault.If this happens, start at the beginning of the troubleshooting procedure until youfind and correct all faults. Always operate the system and/or vehicle to make surethat you have corrected the reported problem. If troubleshooting does not identify afaulty part, the vehicle is defective beyond the level of direct and general supportmaintenance.TROUBLESHOOTING BASICSTroubleshooting ProcedureA troubleshooting procedure serves as a starting point for your troubleshooting work. You will branch in and out ofprocedures as you work to find a fault. Also, you will correct the fault, and check that the fault has been corrected.Locating the Correct Troubleshooting ProcedureComponent/carrier arrives at shop.Read DA Form 2404.Verify that the problem on DA Form 2404 exists.Look up carrier symptom in Troubleshooting Task Index and go to that task.Perform the Troubleshooting ProcedureMake sure you have all items in INITIAL SETUP.Perform required action(s) in Equipment Conditions.Complete first block of task steps.0005 00-1
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