4. Preform Operational Checkout.
Follow the six basic steps below to carry out
Check all systems and functions on the machine.
Use the helpful diagnostic information in the
1. Know the system.
checkout to pinpoint the possible cause of the
Study the machine technical manual. Understand
the system and circuits. Use schematics,
5. Preform troubleshooting.
component location drawings, and theory of
operation for each circuit and circuit components to
Connect laptop computer, if available. The
better understand how the system, circuits and
self-diagnosing function lists any service codes and
gives corrective action information.
2. Ask the operator.
Before starting any troubleshooting first check
battery voltage, fusible link, and fuses.
What type of work was the machine doing when the
trouble was noticed?
Go to test groups to check pressures and voltages.
Make sure adjustment are correct.
Did the trouble start suddenly or has it been getting
6. Trace a cause.
Did the machine have any previous problems? If
Before reaching a conclusion, check the most
so, which parts were repaired?
probable and simplest to verify. Use the flow charts
and symptom, problem, solution charts to help
3. Inspect the machine.
identify probable problem components.
Check all daily maintenance points. (See the
Make a plan for appropriate repair to avoid other
operators manual). Check batteries, fuses, fusible