Suzuki GSX-R750 Service Manual page 190

1A-118 Engine General Information and Diagnosis:
P1658 (Use of SDS)
Step
1 1) Turn the ignition switch OFF.
2) Lift and support the fuel tank. Refer to "Fuel Tank
Removal and Installation in Section 1G (Page 1G-9)".
3) Check the EXCVA motor coupler (1) for loose or poor
contacts.
Is the contacting OK?
2 1) Turn the ignition switch OFF.
2) Remove the right under cowling. Refer to "Exterior Parts
Removal and Installation in Section 9D (Page 9D-11)".
3) Check the installation of EXCV cables. Refer to "EXCV
Cable Removal and Installation in Section 1K (Page 1K-
6)".
If it is necessary, adjust the EXCV cables.
4) Disconnect the EXCVA position sensor coupler (1).
Action
1
I837H1110154-01
I837H1110100-01
1
I837H1110101-01
Yes
Go to Step 6.
Go to Step 3.
No
Loose or poor contacts
on the EXCV motor
coupler.
• Loose or poor
contacts on the ECM
coupler (terminal "7"
or "35").
• Open or short circuit
in the R or B/Br wire.