Sea-doo RX Shop Manual page 146

Section 05 ENGINE MANAGEMENT (DI)
Subsection 03 (COMPONENT INSPECTION AND ADJUSTMENT)
Voltage Test — Both TPS
Check the voltage output from MPEM to the desired
throttle position sensor.
Disconnect plug connector from throttle position
sensor and connect a voltmeter between pin 1 and
3 and also between pin 1 and 2 in the wiring har-
ness.
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.
The resistance should be 2500 Ω.
Check the resistance between terminal 5 and ter-
minal 10 with the throttle plate in idle position.
The resistance should be 1200 Ω.
PTO Side
Disconnect the AMP plug connector number 4 on
the MPEM.
Using a multimeter, check resistance value be-
tween terminal 3 and 18.
The resistance should be 1600 - 2400 Ω.
Check the resistance between terminal 1 and ter-
minal 3 with the throttle plate in idle position.
The resistance should be 1000 Ω.
Check the resistance between terminal 1 and ter-
minal 18 with the throttle plate in idle position.
The resistance should be 2500 Ω.
Test Results — Both TPS
If resistance values are correct, try a new MPEM.
Refer to MPEM replacement procedures else-
where in this section.
05-03-20
If resistance values are incorrect, repair the wiring
harness/connectors between AMP plug connec-
tor and the TPS.
Replacement
Remove the air intake silencer.
Remove the air duct.
Disconnect the connector of the TPS.
Loosen two Allen screws retaining the TPS.
Remove TPS.
MAG SIDE THROTTLE BODY
1. Throttle position sensor (TPS)
2. Allen screws
Apply Loctite 243 on screw threads, install the
new TPS.
NOTE: Both TPS do not need to be replaced at the
same time.
Reinstall remaining removed parts.
Proceed with the Closed TPS Adjustment. See be-
low.
Closed TPS Adjustment
NOTE: Although this operation is called "adjust-
ment", it is not really an adjustment. Rather, it per-
forms a reset of the values in the MPEM.
This reset is very important. The setting of the TPS
will determine the basic parameters for all fuel
mapping and several MPEM calculations.
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