Suzuki GSX-R750 Service Manual page 451

9-34 ELECTRICAL SYSTEM
SPEEDOMETER
If the speedometer, odometer or trip meter does not function
properly, inspect the speedometer sensor and connection of
couplers. If the speed sensor and connection are functioning
properly, replace the meter with a new one.
SPEED SENSOR
• Remove the front seat.(8-7)
• Lift and support the fuel tank. (5-3)
• Disconnect speed sensor coupler 1.
• Remove the speed sensor 2 by removing its mounting bolt.
• Connect 12 V battery, 10 kΩ resistor and the multi-circuit
tester as shown in the 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 (0 V→ 12 V or 12 V→ 0 V). If the tester
reading voltage does not change, replace the speedometer
sensor with a new one.
NOTE:
The highest voltage reading in this test will be the same as that
of battery (12 V).
OIL PRESSURE INDICATOR
NOTE:
Before inspecting the oil pressure switch, check if the engine oil
level is correct. (  2-12)
• Remove the left under cowling. (8-5)
• Disconnect the oil pressure switch lead wire from the oil pres-
sure switch.
• 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 any indications are abnormal, replace the combination meter
with a new one after checking connection of couplers.
12 V
10 kΩ
B/W
B
(Battery voltage)
B/R
Speed sensor