Yamaha F225A Service Manual page 323

Operating injector procedure:
A voltage is applied to the injector of the selected cylinder, the injector is activated, and then the fuel
system is checked. The fuel is injected 20 times within two seconds.
WARNING
• Do not perform the test with the injector removed from the cylinder head or with any fuel
system parts removed. High-pressure fuel may spurt out.
• When performing the this operation, keep all sparks, flames, or other sources of ignition
away from the testing area. Gasoline is highly flammable.
1. Select the test that you wish to perform by either clicking it or pressing the up or down arrow
keys on your keyboard. (Fig. 29)
NOTE:
• Make sure that the engine is not running.
• The selected item is highlighted in light blue.
• The details of the selected test are displayed in the column on the right, and the items that must
be either checked or performed before the test can start are displayed below the table.
• Only one item can be selected at one time.
• Make sure that there is fuel in the fuel tank, otherwise an error will occur and the test cannot be
performed.
2. Select the cylinder to be tested, and then click the Select button or press the Enter key on your
keyboard. (Fig. 29)
69J3D11
Yamaha Diagnostic System
Fig. 29
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