Suzuki GSF1250 Service Manual page 170

1A-101 Engine General Information and Diagnosis:
Step
1 1) Turn the ignition switch OFF.
2) Remove the seat. Refer to "Exterior Parts Removal and
Installation 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
((+) terminal: "16" – (–) terminal: Ground)
Is the voltage OK?
Action
(B)
"16"
Yes
• Fuel pump relay
circuit malfunction.
Refer to "DTC "C41"
(P0230-H/L): FP
Relay Circuit
Malfunction
(Page 1A-97)".
• 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
I718H1110256-01
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)".
(A)
I718H1110250-01
No
Open or short circuit in
the R/Bl wire.