Basic Adjustments; Idle Speed; Closed Throttle And Idle Actuator Reset - Can-Am DS 450 2008 Shop Manual

Section 05 FUEL SYSTEM
Subsection 01 (ELECTRONIC FUEL INJECTION (EFI))
Also remember this validates the operation of the
sensor at room temperature. It does not validate
the over temperature functionality. To test it, the
sensor could be removed from the engine and
heated with a heat gun while it is still connected to
the harness to see if the ECM will detect the high
temperature condition and generate a fault code.

BASIC ADJUSTMENTS

IDLE SPEED

The idle speed is not adjustable. The ECM con-
trols the idle speed of the engine.
CAUTION: Never attempt to adjust the sealed
idle stop screw. It is calibrated at the factory.
If the screw adjustment is changed, the throttle
body must be replaced.
If desired, the engine RPM can be verified with a
tachometer (P/N 529 014 500).
Install the tachometer wire on spark plug cable.
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CLOSED THROTTLE AND IDLE
ACTUATOR RESET
NOTE: This operation performs a reset of the val-
ues in the ECM.
This reset is very important. The setting of the
TPS will determine the basic parameters for all fu-
el mapping and several ECM calculations and the
setting of the idle air control valve will determine
the basic parameters for the idle speed control of
the engine.
Closed throttle and idle actuator reset must be
done if:
– TPS is loosened, removed or replaced.
– Throttle body is replaced.
– IACV is replaced.
182
– ECM is replaced.
CAUTION: An improperly set TPS or idle air
control valve may lead to poor engine perfor-
mance and emission compliance could possi-
bly be affected. In addition, improper idle air
control valve reset may lead to poor engine
starting, improper idle (too low or too high) and
engine stop on deceleration.
Use the B.U.D.S. software to perform this adjust-
ment.
Remove throttle body cover and ensure the throt-
tle cam of throttle body rests against set screw
without any tension in the cable.
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1. Contact here
2. Free-play here
Open throttle approximately one quarter then
quickly release. Repeat 2 - 3 times to settle throt-
tle plate. If stopper does not rest against its stop
lever, check throttle cable adjustment. Refer to
STEERING SYSTEM
.
To reset valve and TPS, click on the Reset button
in the Setting section of B.U.D.S.
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NOTE: No message will be displayed if operation
is successful or wrong. If throttle was opened
more than 3°, a non-zero value will be displayed
when ECM will be read. An error code will appear
after 5 ECM starts.
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