Suzuki RM250 - Throttle Position Sensor Service

FUEL SYSTEM 11-9
THROTTLE POSITION SENSOR
INSPECTION
THROTTLE POSITION SENSOR INPUT VOLTAGE
• Disconnect the throttle position sensor coupler 1.
• Shift the transmission into neutral.
• Start the engine.
• Measure the throttle position sensor input voltage with the
multi-circuit tester.
 09900-25008: Multi-circuit tester set
 Tester knob indication: Voltage ()
 B/G (+ probe) – B/Br (- probe):
4 – 6 V (Over 3 000 r/min)
• If the voltage is not within the specified value, replace the CDI
unit.
THROTTLE POSITION SENSOR COIL RESISTANCE
• Remove the seat and fuel tank. (5-4)
• Measure the throttle position sensor coil resistance with the
multi-circuit tester.
 09900-25008: Multi-circuit tester set
 Tester knob indication: Resistance (Ω)
 Reference data
B/G (+ probe) – B/Br (- probe): 4 – 6 kΩ
 Reference data
B/Bl (+ probe) – B/Br (- probe):
When the throttle is full closed: 0.3 – 0.75 kΩ
When the throttle is full opened: 2.5 – 5.0 kΩ
• If the resistance is correct, it is not necessary to replace the
throttle position sensor.
• If the resistance is not within the specified value, replace the
throttle position sensor assembly.
B/Br
B/G
B/Bl
B/Br
B/G
B/Bl
FWD