Sea-doo GTX Limited iS 255 2009, Shop Manual

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Section 04 FUEL SYSTEM
Subsection 02 (ELECTRONIC FUEL INJECTION (EFI))
Throttle plate must fully open and when released,
must return freely to the rest position (slightly
opened).
Push throttle plate where shown. It must com-
pletely close and when released, freely return to
the rest position (slightly opened).
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1. Push here to close
If throttle plate does not move smoothly or does
not return freely to the position, the problem is
mechanical. Check for salt accumulation on throt-
tle plate shaft. It may also be an actuator or gear
problem. Replace throttle body as necessary.
If throttle plate operates normally, the problem
is electrical. Check throttle actuator (ETA) wiring
continuity, throttle position sensor (TPS) and
throttle accelerator sensor (TAS).
WARNING
Replace throttle body when throttle plate
does not return properly.
Throttle Body Replacement
Removal
Open seat.
Remove rear ventilation box. Refer to AIR INTAKE
SYSTEM .
Remove deck extension. Refer to BODY .
1. Lift suspension using the iS up button to gain
access.
NOTE: If more height is required or if the iS can-
not be used, manually lift suspension by the an-
chor points close to handlebar and safely block in
this position. Do not lift the watercraft from the
anchor points.
2. Disconnect inlet hose from throttle body.
3. Disconnect throttle body connector.
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1. Throttle body
2. Inlet hose
3. Connector
4. Remove retaining screws from throttle body.
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1. Throttle body
2. Screws
5. Pull throttle body out.
Installation
Installation of the new throttle body is the reverse
of the removal procedure. However, pay attention
to the following.
Torque retaining screws in a criss-cross sequence
to 9 N•m (80 lbf•
in ).
Perform the Closed Throttle reset. See proce-
dure in
ADJUSTMENTS
.
TPS (THROTTLE POSITION
SENSOR)
General
NOTE: The TPS is part of the throttle body.
The throttle position sensor (TPS) is a double po-
tentiometer that sends a signal to the ECM which
is proportional to the throttle plate angle. The TPS
is located inside the throttle body.
TPS Wear Test
While engine is not running, activate throttle and
pay attention for smooth operation without phys-
ical stops.
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