Suzuki GSF1250 Service Manual

4E-49 ABS:
DTC “42” (C1642): Wheel Speed Sensor Circuit Open (F)
B718H14504010
Wiring Diagram
Refer to “ABS Unit Diagram (Page 4E-8)”.
Troubleshooting
Possible Cause
• Poor contact in the front wheel speed sensor coupler
• Faulty front wheel speed sensor, etc.
Step Action Yes No
1 1) Turn the ignition switch OFF.
2) Remove the right frame head cover. (GSF1250A) Refer
to “Exterior Parts Removal and Installation in Section 9D
(Page 9D-6)”.
3) Remove the left frame cover. Refer to “Exterior Parts
Removal and Installation in Section 9D (Page 9D-6)”.
4) Remove the fuse box mounting bolt. Refer to “ABS
Control Unit Coupler Disconnect and Connect (Page 4E-
70)”.
5) Check the ABS control unit coupler and front wheel
speed sensor coupler for loose or poor contacts. If OK,
then disconnect the ABS control unit coupler.
6) Measure the resistance between “12” (B/R) and ground
at the ABS control unit coupler.
Special tool
(A): 09900–25008 (Multi-circuit tester set)
(B): 09900–25009 (Needle pointed probe set)
Tester knob indication
Resistance (Ω)
Normal value (“12” – Ground)
∞ Ω (Infinity)
Is the resistance between “12” and ground OK?
Go to Step 3. Go to Step 2.
I718H1450077-01
12
ABS control unit coupler
(Harness end)
18
10 13
234
16
89
24
25
21
(A)
(B)
I718H1450078-04

Suzuki GSF1250 Specifications

General

Displacement	1255 cc
Bore x Stroke	79.0 mm x 64.0 mm
Compression Ratio	10.5:1
Fuel System	Fuel injection
Transmission	6-speed, constant mesh
Front Suspension	Telescopic, coil spring, oil damped
Rear Suspension	Link type, coil spring, oil damped
Front Brakes	Dual hydraulic disc
Rear Brakes	Single hydraulic disc
Front Tire	120/70ZR17M/C (58W), tubeless
Rear Tire	180/55ZR17M/C (73W), tubeless
Overall Length	2130 mm
Overall Width	790 mm
Seat Height	805 mm
Wheelbase	1485 mm
Fuel Tank Capacity	19.0 L
Starter	Electric
Final Drive	Chain
Ignition	Electronic ignition (transistorized)
Engine Type	4-stroke, liquid-cooled, DOHC
Ground Clearance	135 mm