Section 04 FUEL SYSTEM
Subsection 02 (ELECTRONIC FUEL INJECTION (EFI))
smr2009-030-013_a
ACTIVATION AND ECM TABS
1. Injector of
cylinder no. 1 shown
Listen to the injector.
If you can he
ar the injector, it validates its oper-
ation. Carr
y out the
FUEL INJECTOR BALANCE
TEST
.
If you do not hear the injector, carry out the
INJEC-
TOR INPUT VOLTAGE TEST
.
Fuel Injec
tor Balance Test with
B.U.D.S.
NOTICE
After fuel
injector activation us-
ing B.U.D.
S., always crank engine in drowned
mode to ven
tilate engine to prevent a potential
backfire d
ue to fuel accumulation in engine.
1. Install a fuel pressure gauge as described in
FUEL PUMP PRESSURE TEST
of
FUEL TANK
AND FUEL PUMP
subsection.
2. Connect
B.U.D.S. Refer to
COMMUNICATION
TOOLS AN
D B.U.D.S. SOFTWARE.
3. Install D.E.S.S. key on its post.
BrieflypresstheSTARTbuttontowakeupthe
ECM. Do not start engine.
4. In B.U.D
.S., click the Fuel Pump button to ac-
tivate
fuel pump.
smr2009-030-014_a
ACTIVATION AND ECM TABS
1. Fuel pump
5. Fuel pressure must be within specification. Re-
fer to
FUEL TANK AND FUEL PUMP
subsec-
tion. Re-activate fuel pump as necessary.
6. In B.U.D.S., energize the fuel injector no. 1.
smr2009-030-013_a
ACTIVATION AND ECM TABS
1. Injector of cylinder no. 1 shown
7. Record the fuel pressure drop for injector no. 1.
8. In B.U.D.S., click the Fuel Pump buttontoac-
tivate fuel pump.
smr200
9-030-014_a
ACTIVATION AND ECM TABS
1. Fuel pump
9. Repea
t the procedure for fuel injectors no. 2
and no
.3and record their pressure drops.
10. The maximum fuel pressure drop between in-
jectors should not exceed the following spec-
ification:
MAXIMUM FUEL PRESSURE DROP ALLOWED
BETWEEN FUEL INJECTORS
10 kPa (1.5 PSI)
11. If pressure drop of any fuel injector is greater
than the specification, replace that injector
then repeat the test.
12. Use the valve on the fuel pressure gauge to re-
lease the pressure (if so equipped). Remove
fuel pressure gauge and reinstall removed
parts.
smr2009-030 233
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