Yamaha SX150C, Руководство по обслуживанию

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9-7
E
TRBL
ANLS
TROUBLE SHOOTING FOR ELECTRIC FUEL
INJECTION
2. Erratic idling
speed
1. The engine speed is not constant when idling.
2. The engine stalls when the throttle lever is pulled back.
3. The engine stalls when the throttle lever is opened or during
outboard operation.
1. Inspect the high-pressure fuel lines.
2. Inspect the ignition system.
3. Inspect the ignition timing.
Items Symptoms
1) Inspect for fuel
line leaks
2) Inspect the fuel
pressure
3) Inspect the
operation of the
fuel injector
4) Inspect the
diagnosis cord
5) Inspect the oxy-
gen density sensor
Fuel pressure is
out of specification
1 Inspect the 30-A fuse
2 Inspect the high-pres-
sure fuel pump opera-
tion
3 Inspect the main relay
4 Inspect the main relay
drive’s ECU output
5 Inspect the pressure
regulator
1) Inspect the wire harness
2) Inspect the ignition spark
3) Inspect the ignition coil
4) Inspect the CDI unit output
peak voltage
5) Inspect the charge coil output
peak voltage
6) Inspect the pulser coil output
peak voltage
1) Inspect the diagnosis
cords
1 Inspect the pulser coil
diagnosis cord
2 Inspect the crank position
sensor diagnosis cord
3 Inspect the engine cool-
ing water temperature
sensor diagnosis cord