Suzuki AN650 2002 - C16 Speed Sensor Circuit Malfunction

6-34 FI SYSTEM/ CVT SYSTEM
“C16” SPEED SENSOR CIRCUIT MALFUNCTION
INSPECTION
DETECTED CONDITION POSSIBLE CAUSE
The speed sensor signal is not input to ECM for
more than 3 sec. during vehicle deceleration.
• Speed sensor circuit open or short.
• Metal particles or foreign material being attached
on the speed sensor.
• Speed sensor malfunction.
• ECM malfunction.
• Remove the foot board. ( : 9-18)
1
2
OK
NG
; Speed sensor input voltage: More than 7 V
( + O/R – - B/W)
z 09900-25008: Multi circuit tester
u Tester knob indication: Voltage ( - )
Loose or poor contacts on
the ECM couplers.
Open or short circuit in the
O/R wire or B/W wire.
Turn the ignition switch OFF.
Check the speed sensor lead wire coupler 1 for loose or
poor contacts.
If OK, then measure the speed sensor input voltage.
Insert the copper wires to the lead wire coupler.
Turn the ignition switch ON.
Measure the speed sensor input voltage at the coupler
between + O/R and - B/W wire.
Remove the speed sensor.
Clean away metal particles or foreign material.
V
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