Suzuki GSF650S Service Manual page 277

6-40 ELECTRICAL SYSTEM
• Connect a 12 V battery (between B and B/W), 10 kΩ resistor
(Between B/R and B) and multi-circuit tester (tester + probe
to B and tester - probe to B/R) as shown.
" 09900-25008: Multi circuit tester set
' Tester knob indication: Voltage (&)
• Move a screwdriver back and forth across the pick-up surface
of the speed sensor. The voltage readings should cycle as fol-
lows (0 V → 12 V or 12 V → 0 V). If the voltage reading does
not change, replace the speed sensor with a new one.
NOTE:
While testing, the highest voltage reading should be the same
as the battery voltage (12 V).
OIL PRESSURE INDICATOR
NOTE:
Before inspecting the oil pressure switch, check if the engine oil
level is correct. (!2-10)
• Remove the signal generator cover. (!3-13)
• Disconnect the oil pressure G/Y lead wire from the oil pres-
sure switch.
• Turn the ignition switch to ON.
• Check if the oil pressure indicator light will light up when
grounding the G/Y lead wire.
If the oil pressure indicator does not light up, replace the combi-
nation meter unit with a new one after checking connection of
couplers.
B/R B
Speed Sensor
To oil
presure
G/Y
switch