Use the following guidelines as you troubleshoot a symptom:
Understand the operation of the machine. Know if the symptom is a characteristic of normal operation or if the symptom is a failure.
Read the systems operation information in order to understand the systems of the machine. Understand the interaction of the machine systems.
Speak with the operator about the symptom. Acquire the following Information:
- The performance of the machine prior to the failure
- First occurrence of the symptom
- The operating conditions at the time of the failure
- The sequence of events prior to the failure (order of the occurrences)
- The troubleshooting steps that have been taken
- The history of repairs of the machine
- The preventive maintenance of the machine
- Related service information about current problems that affect the serial number of the machine
- Inspect the Machine. Look for problems. Notice any unusual odors in the air. Listen for unusual noises.
Perform the "Visual Inspection" steps. Refer to Troubleshooting, "Machine Preparation for Troubleshooting".
When possible, attempt to duplicate the symptom. Operate the machine and repeat the conditions that caused the failure. Check the gauges inside the cab. Notice any unusual odors in the air. Listen for unusual noises.
Determine if the ECM has detected any faults. A diagnostic code is used to specify each detected fault.
Use the information from the operator and your inspection. Attempt to identify a common cause if there is more than one symptom.
If you troubleshoot diagnostic codes and the problem is not resolved, continue troubleshooting using the "Symptom Troubleshooting" section of this manual. Identify the component that is the most probable cause of the symptom.
Use the tests and procedures in this manual to verify the cause of the symptom. Once the cause has been identified, repair the failure. Then, test the system again in order to verify that the symptom is resolved.
Share your troubleshooting information. Use the form in "SIS" or "CBT" feedback to write a brief description about the symptom, testing, and repair of the machine. Include your phone number or your e-mail address so that you can be contacted. This feedback information helps AVSpare improve service information.