1998 ISUZU TROOPER Service Repair Manual

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Page 1441 of 3573

ISUZU TROOPER 1998 Service Repair Manual 6E±324
ENGINE DRIVEABILITY AND EMISSIONS
5. Secure the gasket and the throttle body with the four
bolts.
The vacuum lines must be properly routed under
the throttle body before tightening the mounti

Page 1442 of 3573

ISUZU TROOPER 1998 Service Repair Manual 6E±325 ENGINE DRIVEABILITY AND EMISSIONS
Spark Plug Gap Check
Check the gap of all spark plugs before installation.
Use a round wire feeler gauge to ensure an accurate
check.
Plugs installed with

Page 1443 of 3573

ISUZU TROOPER 1998 Service Repair Manual 6E±326
ENGINE DRIVEABILITY AND EMISSIONS
4. Pull the relay straight up and out of the fuse and relay
box.
TS23986
Installation Procedure
1. Insert the relay into the correct place in the fuse and
rel

Page 1444 of 3573

ISUZU TROOPER 1998 Service Repair Manual 6E±327 ENGINE DRIVEABILITY AND EMISSIONS
Installation Procedure
1. Slide the canister into mounting bracket and install
the mounting bracket two bolts.
014RW146
2. Connect the three hoses to the EVAP

Page 1445 of 3573

ISUZU TROOPER 1998 Service Repair Manual 6E±328
ENGINE DRIVEABILITY AND EMISSIONS
3. Connect the vacuum hoses to the EVAP canister
purge solenoid.
014RW137
4. Connect the electrical connector to the EVAP canister
purge solenoid.
014RW138
Fu

Page 1446 of 3573

ISUZU TROOPER 1998 Service Repair Manual 6E±329 ENGINE DRIVEABILITY AND EMISSIONS
NOTE: It is possible to install the EGR valve rotated 180
from the correct position. Make sure that the base of the
valve is placed so that it aligns with t

Page 1447 of 3573

ISUZU TROOPER 1998 Service Repair Manual 6E±330
ENGINE DRIVEABILITY AND EMISSIONS
Wiring and Connectors
Wiring Harness Service
The control module harness electrically connects the
control module to the various solenoids, switches and
sensor

6E±330
ENGINE DRIVEABILITY AND EMISSIONS
Wiring and Connectors
Wiring Harness Service
The control module harness electrically connects the
control module to the various solenoids, switches and
sensors in the vehicle engine compartment and
passenger compartment.
Replace wire harnesses with the proper part number
replacement.
Because of the low amperage and voltage levels utilized
in powertrain control systems, it is essential that all wiring
in environmentally exposed areas be repaired with crimp
and seal splice sleeves.
The following wire harness repair information is intended
as a general guideline only. Refer to
Chassis Electrical for
all wire harness repair procedures.
Connectors and Terminals
Use care when probing a connector and when replacing
terminals. It is possible to short between opposite
terminals. Damage to components could result. Always
use jumper wires between connectors for circuit
checking. NEVER probe through Weather-Pack seals.
Use an appropriate connector test adapter kit which
contains an assortment of flexible connectors used to
probe terminals during diagnosis. Use an appropriate
fuse remover and test tool for removing a fuse and to
adapt the fuse holder to a meter for diagnosis.
Open circuits are often difficult to locate by sight because
oxidation or terminal misalignment are hidden by the
connectors. Merely wiggling a connector on a sensor, or
in the wiring harness, may temporarily correct the open
circuit. Intermittent problems may also be caused by
oxidized or loose connections.
Be certain of the type of connector/terminal before
making any connector or terminal repair. Weather-Pack
and Com-Pack III terminals look similar, but are serviced
differently.
PCM Connectors and Terminals
Removal Procedure
1. Remove the connector terminal retainer.
2. Push the wire connected to the affected terminal
through the connector face so that the terminal is
exposed.
3. Service the terminal as necessary.
Installation Procedure
1. Bend the tab on the connector to allow the terminal to
be pulled into position within the connector.
2. Pull carefully on the wire to install the connector
terminal retainer.
Wire Harness Repair: Twisted
Shielded Cable
Removal Procedure
1. Remove the outer jacket.
2. Unwrap the aluminum/mylar tape. Do not remove the
mylar.
047
3. Untwist the conductors.
4. Strip the insulation as necessary.
048

Page 1448 of 3573

ISUZU TROOPER 1998 Service Repair Manual 6E±331 ENGINE DRIVEABILITY AND EMISSIONS
Installation Procedure
1. Splice the wires using splice clips and rosin core
solder.
2. Wrap each splice to insulate.
3. Wrap the splice with mylar and with t

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