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Section 08 ENGINE MANAGEMENT (4-TEC)
Subsection 02 (COMPONENT INSPECTION AND ADJUSTMENT)
Apply Loctite 243 on screw threads, install the
new TPS.
Reinstall remaining removed parts.
Proceed with the CLOSED THROTTLE AND IDLE
ACTUATOR RESET. See below.
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
fuel mapping and several ECM calculations and
the setting of the idle bypass valve will determine
the basic parameters for the idle speed control of
the engine.
NOTE:
Reset must be done each time the throttle
position sensor (TPS) or the idle bypass valve is
loosened or removed or throttle body is replaced
or ECM is replaced.
CAUTION:
An improperly set TPS or idle
bypass valve may lead to poor engine per-
formance and emission compliance could
possibly be affected. In addition, improper
idle bypass valve reset may lead to poor en-
gine starting, improper idle (too low or too
high) and engine stop on deceleration.
Use the vehicle communication kit (VCK) with the
B.U.D.S. software to perform this adjustment.
Ensure the throttle body plate stop lever rest
against its stopper. Open throttle approximately
one quarter then quickly release. Repeat 2 - 3
times to settle throttle plate. If stopper does not
rest against its stop lever, perform throttle cable
adjustment. Refer to THROTTLE BODY in AIR
INDUCTION SYSTEM above.
To properly reset valve, first install safety lanyard
then remove it and then wait 5 seconds. Repeat
this cycle 2-3 times.
Push the
Reset
button in the
Setting
tab of
B.U.D.S.
NOTE:
No message will be displayed if operation
is good. If operation is wrong, an error message
will be displayed.
NOTE:
There is no idle speed adjustment to
perform. The ECM takes care of that. If TPS is
not within the allowed range while resetting the
CLOSED THROTTLE AND IDLE ACTUATOR
,
the ECM will generate a fault code and will not
accept the setting.
Start engine and make sure it operates normally
through its full engine RPM range. If fault codes
appear, refer to SYSTEM FAULT CODES in DIAG-
NOSTIC PROCEDURES section for more informa-
tion.
IDLE BYPASS VALVE
An idle bypass valve with good resistance mea-
surement can still be faulty. It is also possible
that a mechanical failure occurs which is not de-
tectable without measuring the air flow. Replac-
ing the idle bypass valve may be necessary as a
test.
Resistance Test
Disconnect idle bypass valve from the wiring har-
ness.
Using a multimeter, check the resistance in both
windings.
Check the resistance between terminals A and D
and also between terminals C and B of the idle
bypass valve.
The resistance in each winding should be approx-
imately 50
at 23°C (73°F).
If the resistance of one or both windings is not
good, replace the idle bypass valve.
If resistance test of valve windings is good, check
continuity of circuits A-35, A-36, A-37, A-38.
Visual Inspection
Remove idle bypass valve from throttle body.
Check the piston and bypass channel for dirt/de-
posits which can cause a sticking piston.
CAUTION:
Do not try to operate the piston of
the idle bypass valve when it is dismounted.
Also do not move the piston by hand. The
screw drive is very sensitive and will be de-
stroyed.
Clean the parts and install the idle bypass valve on
the throttle body.
Proceed with the
CLOSED THROTTLE AND IDLE
ACTUATOR RESEt
. See above.
smr2004-Complete Line Up
423
www.SeaDooManuals.net
Summary of Contents for 2006 GTI
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