Troubleshooting Intermittent Electrical Faults - Toro Greensmaster e1021 Diagnostic Manual

Testing the Voltage of a Circuit
1. Measure the voltage between the identified wire harness connector pins or component terminals and
the suspected points of failure.
2. If the voltage that you measure is higher or lower than the specified voltage, clean and inspect the terminal
connections along the circuit path that you are testing.
Cleaning Electronic Components and Connections
Note:
Use electrical contact cleaner only. Do not use brake cleaner, as it may permanently damage electrical
connector bodies and other plastic components of the machine. Avoid using mineral solvents, as they may
damage connectors, seals, and wire insulation.
WARNING
Cleaning chemicals and tools can cause injury if used improperly.
Refer to the applicable safety data sheet (SDS) for appropriate personal protective gear, such
as gloves, respirators, and safety glasses.
1. Mark the wires for proper installation after cleaning is completed. Remove pins from connectors with the
proper extraction tool.
2. Clean the terminals or the connector pins using an eraser, mild abrasive paper, or a nylon or fiber bristle
brush. Do not use metal or metal oxides.
3. Finish the cleaning with a fiber bristle brush dipped in isopropyl alcohol.
4. Gently wipe off the clean pins, terminals, and components with a lint-free cloth dampened with isopropyl
alcohol.
5. When available, dry the components with dry, oil-free compressed air with a pressure of no more than
138 kPa (20 psi).
6. Ensure that all connectors and components are clean and dry prior to reassembly and testing.
Using the InfoCenter Display
The InfoCenter display shows information about your machine, such as the operating status, various
diagnostics, and other information about the machine. When you start the machine, the screen appears and
displays the corresponding icons that apply.
To find additional information on navigating the InfoCenter menu items, refer to the operator's manual or
service manual for your machine.

Troubleshooting Intermittent Electrical Faults

Attempt to Duplicate the Fault
1. Operate the machine based on the information provided by the operator.
2. Observe the machine during normal operation. Pay attention to how the machine is being operated.
3. Work toward being able to duplicate the fault predictably.
4. Make notes as you proceed through your diagnosis. Document your steps and any test results for future
reference.
Complete the Basic Maintenance Checks
Check the Condition of the Battery
1. Inspect for any corroded, loose, or damaged wires and connections.
2. Loosen, clean, and tighten the battery connections (cables, posts, etc.).
3. Load test the battery to ensure it meets the output specification.
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