Suzuki GSF650A Service Manual page 532

4E-45 ABS:
Step
3 1) Turn the ignition switch OFF.
2) Remove the left frame cover. Refer to "Exterior Parts
Removal and Installation (GSF650/S/A/SAK7) in Section
9D (Page 9D-6)".
3) Remove the fuse box mounting bolt. Refer to "ABS
Control Unit Coupler Disconnect and Connect (Page 4E-
69)".
4) Check the ABS control unit coupler for loose or poor
contacts. If OK, then disconnect the ABS control unit
coupler.
5) Measure the voltage between "9" (R/B) and "25" (B/W) at
the coupler.
Special tool
(A): 09900–25008 (Multi-circuit tester set)
Tester knob indication
Voltage ( )
Normal value ("9" – "25")
Battery voltage (12.0 V and more)
ABS control unit coupler (Harness end)
18
10
2
Is the voltage between "9" and "25" normal?
Action
(A)
21
24 25
16
12 13
8
3
4
(A)
Replace the ABS
control unit/HU.
( )
9
( )
I718H1450076-02
Yes
Inspect the wire
harness. (Faulty motor
power supply or ground
wire)
No