Troubleshooting Steps

The most important point in troubleshooting is to determine "Probable Causes". Once the probable causes are determined, parts to be checked can be limited to those associated with such probable causes. Therefore, unnecessary checks can be eliminated. The determination of the probable causes must be based on a theory and be supported by facts and must not be based on intuition only.




If an attempt is made to solve a problem without going through correct steps for troubleshooting, the problem symptoms could become more complicated, resulting in failure to determine the causes correctly and making incorrect repairs. The four steps below should be followed in troubleshooting.
1. Observe the symptom carefully. Check if there are also other problems.
2. In determining the probable causes, it is necessary to check the wiring diagram to understand the circuit as a system. Knowledge of switches, relays and other parts is necessary for accurate determination. The causes of similar problems in the past must be taken into account.
3. Troubleshooting is carried out by making step by step checks until the true cause is found, Always go through the procedures considering what check is to be made where for the best results.
4. After the problems are corrected, be sure to check that the system operates correctly. Also, check that new problems have not been caused by the repair.