Suzuki GSX1300BKA Supplementary Service Manual page 74

4E-39 ABS:
Step
3 1) Remove the front seat. Refer to "Exterior Parts Removal
and Installation in Section 9D in related manual".
2) Lift and support the fuel tank with the prop stay. Refer to
"Fuel Tank Removal and Installation in Section 1G in
related manual".
3) Check the ABS control unit coupler for loose or poor
contacts. If OK, then disconnect the ABS control unit
coupler. Refer to "ABS Control Unit Coupler Disconnect
and Connect (GSX1300BKAK8) (Page 4E-9)".
4) Measure the voltage between "2" (R/B) and "1" (B/W) at
the coupler.
Special tool
(A): 09900–25008 (Multi-circuit tester set)
Tester knob indication
Voltage ( )
Normal value ("2" – "1")
Battery voltage (12.0 V and more)
ABS control unit coupler (Harness end)
(–)
Is the voltage between "2" and "1" normal?
Action
( )
(A)
Yes
Replace the ABS
control unit/HU. Refer to
"ABS Control Unit/HU
Removal and
Installation
(GSX1300BKAK8)
(Page 4E-13)".
I823H3450036-01
I823H3450035-01
No
Inspect the wire
harness. (Faulty motor
power supply or ground
wire)