Suzuki GSF650A Service Manual page 178

1A-103 Engine General Information and Diagnosis:
Step
1 1) Turn the ignition switch OFF.
2) Remove the seat. Refer to "Exterior Parts Removal and
Installation (GSF650/S/A/SAK7) in Section 9D
(Page 9D-6)".
3) Check the ECM coupler for loose or poor contacts. If OK,
then measure the ECM input voltage.
4) Disconnect the ECM coupler.
5) Insert the needle pointed probe to ECM coupler.
6) Measure the voltage between terminal "16" and ground.
Special tool
(A): 09900–25008 (Multi-circuit tester set)
(B): 09900–25009 (Needle pointed probe set)
Tester knob indication
Voltage ( )
ECM input voltage
Battery voltage
Is the voltage OK?
Action
(B)
"16"
Yes
• R/Bl wire open or
short or poor 16
connection.
• If wire and
connection are OK,
intermittent trouble 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. Refer to "ECM
Removal and
Installation in Section
I717H1110035-02
1C (Page 1C-1)".
(A)
I718H1110250-01
No
Open or short circuit in
the R/Bl wire.