Section 06
ENGINE MANAGEMENT (DI)
Subsection 03
(COMPONENT INSPECTION AND ADJUSTMENT)
06-03-22
SMR2002-075 _06-03A.FM
THROTTLE POSITION SENSOR
(TPS)
General
The throttle position sensor (TPS) is a potentiom-
eter that sends a signal to the MPEM which is pro-
portional to the throttle shaft angle. On the DI sys-
tem, two sensors are used for redundancy purposes.
The MPEM compares the signals from both sensors
and determines if there is an error and uses the most
appropriate sensor to operate the system.
1. Throttle position sensor (TPS)
IMPORTANT:
Prior to testing the TPS, ensure that
mechanical components/adjustments are adequate
according to THROTTLE BODY in AIR INDUCTION
SYSTEM
above.
The MPEM may generate two types of fault codes
pertaining to the TPS. Refer to DI SYSTEM FAULT
CODES in DIAGNOSTIC PROCEDURES section
for more information.
Wear Test
While engine is not running, activate throttle and
pay attention for smooth operation without physi-
cal stops of the cable.
Using the vehicle communication kit (VCK) with the
B.U.D.S. software, use the THROTTLE OPENING
display under
Monitoring
.
Slowly and regularly depress the throttle. Observe
the needle movement. It must change gradually
and regularly as you move the throttle. If the nee-
dle “sticks”, bounces, suddenly drops or if any dis-
crepancy between the throttle movement and the
needle movement is noticed, it indicates a worn
TPS that needs to be replaced.
NOTE:
In this particular case, by comparing the
signals from both sensors, the MPEM will gener-
ate a fault code when the TPS is malfunctioning
due to specific “spots”.
To isolate the faulty TPS, disconnect one and test
the other.
Voltage Test — Both TPS
Check the voltage output from MPEM to the desired
throttle position sensor.
Disconnect plug connector from throttle position sen-
sor and connect a voltmeter to the wiring harness.
Check the voltage readings on the PTO side as
follows.
Check the voltage readings on the MAG side as
follows.
Remove and reinstall the safety lanyard to activate
the MPEM. There should be 5 Vdc in each test.
If voltage test is good, replace the TPS.
If voltage test is not good, check the resistance of
the TPS circuit.
Resistance Test
Reconnect
the TPS.
NOTE:
Resistance values are different at idle on
each TPS.
MAG Side
Disconnect the AMP plug connector number 3 on
the MPEM.
Using a multimeter, check resistance value be-
tween terminal 10 and 14.
The resistance should be 1600 - 2400
Ω
.
Check the resistance between terminal 5 and ter-
minal 14 with the throttle plate in
idle
position.
1
F12F05A
1
CONNECTION
VOLTAGE
Pin 1 with engine ground
5 V
Pin 2 with engine ground
0 - 0.5 V
Pin 3 with engine ground
0 V
CONNECTION
VOLTAGE
Pin 1 with engine ground
5 V
Pin 2 with engine ground
0 - 0.5 V
Pin 3 with engine ground
4.75 - 5 V
www.SeaDooManuals.net
Содержание GTX 4-TEC 5573 2002
Страница 1: ...www SeaDooManuals net ...
Страница 2: ...2002 Shop Manual Volume 2 GTX DI GTX 4 TEC www SeaDooManuals net ...
Страница 501: ...GTX DI MODEL www SeaDooManuals net ...
Страница 502: ...F18Z0P MODEL GTX DI 2002 12 VOLTS DISTRIBUTION www SeaDooManuals net ...
Страница 503: ...GTX 4 TEC MODEL www SeaDooManuals net ...
Страница 505: ...www SeaDooManuals net ...