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Section 06
ENGINE MANAGEMENT (DI)
Subsection 03
(COMPONENT INSPECTION AND ADJUSTMENT)
06-03-16
SMR2002-075 _06-03A.FM
Gently pull rail up by hand, working each side slight-
ly at a time.
Pull rail out.
Disconnect hose ends at their inline connectors
and drain fuel rail.
Disconnect air and fuel hoses from rail.
1. Air and fuel return hoses
2. Fuel supply hose
NOTE:
When lifting/removing air/fuel rail, we rec-
ommend replacing carbon dams on direct injec-
tors that have been running for 50 hours or more.
Remove fuel injector, fuel pressure regulator and
air pressure regulator.
Installation
For installation, reverse the removal process but
pay attention to the following.
A thin film of injection oil may be applied to O-rings
of fuel injectors to ease rail installation.
Apply Loctite 243 on rail retaining screws then torque
to 25 N•m (18 lbf•ft).
When installing fuel or air hoses fitting to the air/
fuel rail, use Loctite Krylox (no. 29-719).
DIRECT INJECTOR
When one direct injector is defective, both have
to be replaced at the same time. Be sure to check
the other one. Also replace fuel injectors.
The direct injectors can be replaced by lifting the
air/fuel rail.
Leakage Test
If direct injector leaks through its large top O-ring,
there will be an air/fuel leak between the injector
and the air/fuel rail. Replace O-ring of both injectors.
If there is an injector internal leak, the high tempera-
ture from the combustion chamber will make visible
overheated area. Replace damaged components.
Electrical Test
Using the vehicle communication kit (VCK) with
the B.U.D.S. software, energize the direct injector
in the ACTIVATION section.
If the injector does not work, disconnect the plug
connector from the injector.
Install a temporary connector to the injector with
wires long enough to make the connection out-
side the bilge and apply voltage (12 V) to this test
harness.
This will validate its mechanical and electrical op-
eration.
If it does not work, replace the direct injector.
Otherwise, check the resistance of the direct in-
jector circuit.
Reconnect
the injector and disconnect the AMP
plug connector number 4 on the MPEM.
Using a multimeter, check resistance value be-
tween terminals as follows.
The resistance should be between 1 and 1.6
Ω
.
If resistance value is correct, try a new MPEM.
Refer to MPEM REPLACEMENT procedures else-
where in this section.
If resistance value is incorrect, repair the wiring
harness/connectors between AMP plug connec-
tor and direct injector.
Direct Injector Replacement
IMPORTANT:
Do not remove direct injector need-
lessly. They are sealed with a carbon dam that may
expand when pulled out. A special tool is required
to compress it prior to reinstalling. Otherwise,
sealing efficiency might be affected.
Remove air/fuel rail retaining screws. Partially lift
rail to allow direct injector removal.
1
2
F12R0FA
COMPONENT
CONTACT LOCATION
Direct injector MAG
5 and 15
Direct injector PTO
6 and 21
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Summary of Contents for GTX 4-TEC 5573 2002
Page 1: ...www SeaDooManuals net ...
Page 2: ...2002 Shop Manual Volume 2 GTX DI GTX 4 TEC www SeaDooManuals net ...
Page 501: ...GTX DI MODEL www SeaDooManuals net ...
Page 502: ...F18Z0P MODEL GTX DI 2002 12 VOLTS DISTRIBUTION www SeaDooManuals net ...
Page 503: ...GTX 4 TEC MODEL www SeaDooManuals net ...
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