Dtc "42" (C1642): Wheel Speed Sensor Circuit Open - Suzuki GSF1250 Service Manual

4E-49 ABS:
DTC "42" (C1642): Wheel Speed Sensor Circuit Open (F)
• Poor contact in the front wheel speed sensor coupler
• Faulty front wheel speed sensor, etc.
Wiring Diagram
Refer to "ABS Unit Diagram (Page 4E-8)".
Troubleshooting
Step
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)
(A)
Is the resistance between "12" and ground OK?
Possible Cause
Action
I718H1450077-01
18 21
24 25
10 12 13
16
8 9
2 3 4
ABS control unit coupler
(Harness end)
(B)
I718H1450078-04
Yes
Go to Step 3.
B718H14504010
No
Go to Step 2.