Suzuki AN400 Service Manual page 101

Step
2 1) Insert the needle pointed probes to the lead wire coupler.
(between positive terminal: P and negative terminal: B/
W)
2) Turn the ignition switch ON.
3) Check that the speed sensor output voltage varies when
a screwdriver is brought close to the pick-up face of the
speed sensor.
Special tool
(A): 09900–25008 (Multi-circuit tester set)
(B): 09900–25009 (Needle pointed probe set)
Tester knob indication
Voltage ( )
Is the voltage OK?
Action
I705H1110053-01
Engine General Information and Diagnosis:
Yes
• Recheck ECM
coupler for loose or
poor contacts.
• Replace ECM with a
new one and inspect
again.
1A-38
No
• Short circuit in the
lead wire.
• Replace the speed
sensor with a new
one.