Section 07
ENGINE MANAGEMENT (4-TEC)
Subsection 03
(COMPONENT INSPECTION AND ADJUSTMENT)
07-03-24
SMR2002-078 _07_03A.FM
Resistance Test
Disconnect the plug connector from the EGT and
check the resistance of the sensor itself.
The resistance should be between 2280
Ω
and
2740
Ω
at 20°C (68°F).
Otherwise, replace the EGT.
If resistance tests good,
reconnect
the EGT and
disconnect the EMS ECU connector A on the EMS
ECU.
Using a multimeter, recheck resistance value be-
tween terminals 10 and 26.
If resistance value is correct, try a new EMS ECU.
Refer to EMS ECU replacement procedures else-
where in this section.
If resistance value is incorrect, repair the connec-
tor or replace the wiring harness between EMS
ECU connector and the EGT.
Replacement
Disconnect EGT connector and remove EGT.
Apply Loctite 518 on threads of the EGT then in-
stall.
Replug connector.
KNOCK SENSOR (KS)
1. Knock sensor (KS)
Dynamic Test
Using the vehicle communication kit (VCK) with
the B.U.D.S. software, monitor the knock sensor
using the
Faults
section.
Start the engine and bring engine RPM above
5000 RPM. If no fault code occurs, the knock sen-
sor is good.
Otherwise, do the following.
Ensure sensor and head contact surfaces are clean
and mounting bolt and washer are correct and prop-
erly torqued down.
NOTE:
It is necessary to remove intake manifold
to inspect contact surfaces. Refer to INTAKE SYS-
TEM section.
Check the knock sensor resistance.
Disconnect the connector from knock sensor har-
ness.
Static Resistance Test
Using a multimeter, check the resistance between
both terminals on the knock sensor harness side.
The resistance should be approximately
5 M
Ω
.
If resistance is not good, replace knock sensor.
If resistance is good, reconnect the knock sensor
connector and disconnect the EMS ECU connec-
tor A from the EMS ECU.
Using a multimeter, recheck resistance value be-
tween terminals 9 and 23.
If wiring harness is good, try a new EMS ECU. Re-
fer to EMS ECU REPLACEMENT procedures else-
where in this section.
Otherwise, repair the connector or replace the wir-
ing harness between EMS ECU connector and
knock sensor.
1
R1503motr174A
R1503motr188A
9
23
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Содержание GTX 4-TEC 5573 2002
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