Suzuki GSF650A Service Manual page 537

Step
4 1) Measure the resistance between "B" (W) and ground at
the front wheel speed sensor coupler.
Special tool
(A): 09900–25008 (Multi-circuit tester set)
Tester knob indication
Resistance (Ω)
Normal value ("B" – Ground)
∞ Ω (Infinity)
(A)
Is the resistance between "B" and ground OK?
5 1) Check for continuity between "12" (B/R) on the ABS
control unit coupler and "C" (B/R) on the front wheel
speed sensor coupler.
Special tool
(A): 09900–25008 (Multi-circuit tester set)
(B): 09900–25009 (Needle pointed probe set)
Tester knob indication
Continuity test (
Normal value ("12" – "C")
Continuity (
Harness side
(B)
18
10
2
ABS control unit coupler (Harness end)
Is there continuity between "12" and "C"?
Action
Sensor side
"B"
)
)
"C"
21
24 25
12 13 16
8 9
3 4
Yes
Inspect the wire
harness. (Faulty W/R
wire)
I718H1450081-03
Go to Step 6.
(A)
I718H1450082-04
ABS: 4E-50
No
Faulty front wheel
speed sensor
Inspect the wire
harness. (Faulty B/R
wire)