Section 08 ENGINE MANAGEMENT (4-TEC)
Subsection 02 (COMPONENT INSPECTION AND ADJUSTMENT)
If the injector does not work, disconnect the con-
nector from the injector.
Install a temporary connector on the injector with
wireslongenoughtomaketheconnectionout-
side the bilge and apply voltage (12 V) to this test
harness.
CAUTION: While doing fuel injector electrical
test, do not apply continuous voltage to the
connector. This can damage the injector.
This will validate the injector mechanical and elec-
trical operation.
If it does not work, replace it. If it works, continue
procedure.
Using B.U.D.S., activate injector while probing ter-
minal 2 (of injector on harness side) and battery
ground.
– If 12 V is read, check continuity of circuit as per
following table. If it is good, try a new ECM.
CIRCUIT NUMBER
(ECM CONNECTOR “A”)
INJECTOR NUMBER
A-15
1
A-33 2
A-14 3
– If it does not read 12 V, check continuity of cir-
cuit as per following table. If it is good, try a
new MPEM.
CIRCUIT NUMBER
(AMP CONNECTOR #2)
INJECTOR NUMBER
2-16
1
2-17 2
2-18 3
Resistance Test
Reconnect the injector and disconnect the ECM
connector A.
Remove safety lanyard and wait 15 seconds. Dis-
connect engine connector.
CAUTION: Before unplugging engine connec-
tor, always remove safety lanyard and wait 15
seconds. Otherwise, damage to CAPS may oc-
cur.
Using a multimeter, check resistance value be-
tween terminals as follows.
4
R1503motr192A
1
2
3
ENGINE CONNECTOR
R1503motr193A
15
33
14
ECM CONNECTOR
COMPONENT TERMINAL LOCATION
Fuel injector cylinder 1
1 (engine connector) and
A-15 (ECM connector)
Fuel injector cylinder 2
2 (engine connector) and
A-33 (ECM connector)
Fuel injector cylinder 3
3 (engine connector) and
A-14 (ECM connector)
4-TEC Models
The resistance should be between 11.4 and
12.6 .
If resistance value is correct, try a new ECM. Refer
to ECM REPLACEMENT procedures elsewhere in
this section.
If resistance value is incorrect, repair the wiring
harness/connectors or replace the wiring harness
between ECM connector and fuel injector.
All 4-TEC Supercharged Models
The resistance should be between 14 and 15
.
If resistance value is correct, try a new ECM. Refer
to ECM REPLACEMENT procedures elsewhere in
this section.
416 smr2004-Complete Line Up
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