Suzuki GSX-R750 Service Manual page 254

4-98 FI SYSTEM DIAGNOSIS
Step 6
1) Turn the ignition switch OFF.
2) Disconnect the motor lead wire coupler of the EXCVA.
3) Apply 12 V to the terminal and check the operation of
EXCVA.
4) Then, swap the wires supplied 12 V and check the operation
of EXCVA.
(Check the operation of EXCVA both way.)
Is the operation OK?
• Loose or poor contacts on the EXCVA or ECM
coupler (terminal 3 or 4)
• Open or short circuit in the B/R wire or R/B wire
• If wire and connection are OK, intermittent trou-
YES ble or faulty ECM.
• Recheck each terminal and wire harness for
open circuit and poor connection.
• Replace the ECM with a known good one, and
inspect it again.
• Replace the EXCVA with a new one.
NO • Inspect that the EXCV and two cables move
smoothly. (6-11)
5) After repairing the trouble, clear the DTC using SDS tool.
(4-27)
6
6
12 V
6
12 V