Suzuki GSF650A Service Manual page 167

Step
2 1) Turn the ignition switch ON.
2) Measure the injector voltage between the Y/R wire and
ground.
Special tool
(A): 09900–25008 (Multi-circuit tester set)
Tester knob indication
Voltage ( )
Injector voltage
Battery voltage
((+) terminal: Y/R – (–) terminal: Ground)
Is the voltage OK?
Action
(A)
I718H1110207-03
Engine General Information and Diagnosis:
Yes
• Gr/W wire open or
shorted to the
ground, or poor 44
connection (#1
cylinder side).
• Gr/B wire open or
shorted to the
ground, or poor 43
connection (#2
cylinder side).
• Gr/Y wire open or
shorted to the
ground, or poor 42
connection (#3
cylinder side).
• Gr/R wire open or
shorted to the
ground, or poor 41
connection (#4
cylinder side).
• 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
1C (Page 1C-1)".
1A-92
No
Open circuit in the Y/R
wire.