Yamaha F225A Service Manual page 332

TRBL
SHTG
Operating the ISC valve:
Operate the ISC valve and listen to its operating sound. The operating time is three seconds.
1. Select the test to be performed, and then click the Select button or press the Enter key on your
keyboard. (Fig. 40)
2. Click the Execute button or press the Enter key on your keyboard. (Fig. 41)
9-33
Troubleshooting
Fig. 40
Fig. 41
69J3D11