Section 06
ENGINE MANAGEMENT (DI)
Subsection 03
(COMPONENT INSPECTION AND ADJUSTMENT)
06-03-28
SMR2002-075 _06-03A.FM
EXHAUST GAS TEMPERATURE
SENSOR (EGT)
1. Muffler
2. Exhaust gas temperature sensor (EGT)
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
.
Otherwise, replace the EGT.
If resistance tests good,
reconnect
the EGT and
disconnect the AMP plug connector number 4 on
the MPEM.
Using a multimeter, recheck resistance value be-
tween terminals 10 and 12.
If resistance value is correct, try a new MPEM. Re-
fer 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 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
4500 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.
Check the knock sensor resistance.
Disconnect the AMP plug connector number 4
from the MPEM module.
Static Resistance Test
Using a multimeter, check the resistance between
terminal 2 and terminal 17 on the plug connector.
The resistance should be approximately
5 M
Ω
.
Otherwise, check the continuity of the knock sen-
sor circuit 4-2 and 4-17.
If wiring harness is good, try a new MPEM. Refer
to MPEM REPLACEMENT procedures elsewhere
in this section.
Otherwise, repair the wiring harness/connectors
between AMP plug connector and knock sensor.
2
F12R0SA
1
1
F12R0QA
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