Yamaha EF1000iS, Service Manual

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THROTTLE CONTROL SYSTEM
TRBL
THROTTLE CONTROL SYSTEM
ENGINE DOES NOT START, ENGINE STARTS BUT STALLS, ENGINE SPEED
DOES NOT INCREASE, OR ENGINE SPEED IS UNEVEN.
Check AC output.
GOOD NO GOOD
Refer to “GENERATOR SYSTEM” in
CHAPTER 5.
Rotate the shaft of the throttle control motor to check
if it turns smoothly with slight resistance.
GOOD NO GOOD
Replace the throttle control motor.
Replace the throttle control motor.
Replace the control motor.
Measure the coil resistance between 3-1, 3-2, 3-4,
and 3-5 of the throttle control motor.
(Tester range:
Ω ×
1)
SPECIFICATION OUT OF SPECIFICATION
Coil resistance:
250
Ω
± 20% at 20 °C (68 °F)
Check the connections of the wire harness connectors
and couplers, and the wires for an open circuit or short
circuit.
GOOD NO GOOD Correct or replace.
7VV10-06 02.10.4 10:41 AM Page 6