Suzuki GSX-R750, Service Manual

Page: 366 / 495

ELECTRICAL SYSTEM 7-35
To oil pressure
switch
B
B/R
SPEEDOMETER
If the speedometer, odometer or trip meter does not function
properly, inspect the speedometer sensor and connection of cou-
plers. If the speedometer sensor and connection are all right,
replace the meter with a new one.
SPEEDOMETER SENSOR
• Lift the fuel tank. (
4-51)
• Disconnect speedometer sensor lead wire coupler.
• Remove the speedometer sensor
1
by removing its mount-
ing bolt.
• Connect 12V battery (between B/R and B/W), 10 k
Ω
resistor
(between B/R and B) and the multi circuit tester (
+
probe of
tester to B/R and
-
to B) as shown right illustration.
B/R: Black with Red tracer
B/W: Black with White tracer
B: Black
09900-25008: Multi circuit tester set
Tester knob indication: Voltage ( )
• Under above condition, if a suitable screwdriver touching the
pick-up surface of the speed sensor is moved, the tester read-
ing voltage changes (0V
→
12V or 12V
→
0V). If the tester read-
ing voltage does not change, replace the speedometer sensor
with a new one.
NOTE:
The highest tester reading voltage (12V) while testing is same
as battery voltage.
OIL PRESSURE INDICATOR
NOTE:
Before inspecting the oil pressure switch, check if the engine oil
level is enough. (
2-13)
• Remove the right under cowling. ( 6-5)
• Disconnect the oil pressure switch lead wire from the oil pres-
sure switch. ( 3-6)
• Turn the ignition switch ON.
• Check if the oil pressure indicator
A
will light and LCD
B
will
flicker, when grounding the lead wire.
If each indication are abnormal, replace the combination meter
with a new one after checking connection of couplers.