Isuzu Trooper (2000 year). Service manual — part 350
6E–529
TROOPER 6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
D
Bank 1 sensor 1 is mounted on the exhaust pipe
ahead of the right-hand catalytic converter.
TS22912
D
Bank 1 sensor 2 is mounted behind the right-hand
catalytic converter.
TS22913
D
Bank 2 sensor 1 is mounted on the exhaust pipe
ahead of the left-hand catalytic converter.
TS22914
D
Bank 2 sensor 2 is mounted behind the left-hand
catalytic converter.
TS22915
6E–530
TROOPER 6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
3. Disconnect the pigtail from the wiring harness.
060RY00017
IMPORTANT:
The pigtail is permanently attached to
the sensor. Be careful not to pull the wires out.
NOTE: Do not use a torch to remove an HO2S unless the
sensor is being replaced. Using a torch could damage the
sensor.
4. Remove the sensor from the exhaust pipe.
D
Because of the expansion and contraction of the
metal in the exhaust system over time, this may be
difficult if the engine temperature is below 48
°
C
(120
°
F).
060RY00017
Inspection Procedure
All four sensors are identical. Inspect each in the same
way.
1. Inspect the pigtail and the electrical connector for
grease, dirt, corrosion, and bare wires or worn
insulation.
2. Inspect the louvered end of the sensor for grease,
dirt, or other contaminations.
060RY00017
Installation Procedure
IMPORTANT:
D
A special anti-seize compound on the HO2S threads.
This compound consists of glass beads suspended in
a liquid graphite solution. The graphite burns away
with engine heat, but the glass beads will remain,
making the sensor easier to remove.
D
New or service sensors will already have the
compound applied to the threads. If a sensor is
removed and is to be reinstalled for any reason, the
threads must have anti-seize compound applied.
1. Apply anti-seize compound or the equivalent to the
threads of the oxygen sensor, if necessary.
2. Install the oxygen sensor on the exhaust pipe in its
original position.
Tighten
D
Tighten the oxygen sensor to 55 N·m (40 lb ft.).
060RY00017
6E–531
TROOPER 6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
3. Connect the pigtail to the wiring harness.
4. Connect the negative battery cable.
Intake Air Temperature (IAT)
Sensor
Removal Procedure
1. Disconnect the negative battery cable.
2. Remove the engine cover
3. The IAT sensor is located in the intake air duct, behind
the throttle body.
4. Disconnect the electrical connector from the IAT
sensor.
TS23741
5. Remove the IAT sensor from the intake air duct by
using a rocking motion while pulling the sensor.
Installation Procedure
1. Install the IAT sensor into the grommet in the intake
air duct.
2. Correct the IAT electrical connector.
TS23741
3. Install the engine cover.
4. Connect the negative battery cable.
ION Sensing Module
Removal Procedure
1. Disconnect the negative battery cable.
2. Disconnect the ION sensing module connector.
3. Remove the bolts and the ION sensing module from
the common chamber.
060RY00087
Installation Procedure
1. Install the ION sensing module on the common
chamber with the bolts.
Tighten
D
Tighten the ION sensing module to 4 N·m (35 lb
in.).
6E–532
TROOPER 6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
2. Connect the ION sensing module connectors as
shown in the illustration.
060RY00111
Legend
(1) Green Color Connector
(2) Blue Color Connector
(3) Identification Mark (6VE1 Engine Only)
3. Connect the negative battery cable.
Mass Air Flow (MAF) Sensor
Removal Procedure
1. Disconnect the negative battery cable.
2. Disconnect the electrical connector from the MAF
sensor.
TS23740
3. Loosen the clamps which secure the intake air duct
and the air cleaner to the MAF sensor.
4. Remove the intake air duct from the MAF sensor.
5. Remove the MAF sensor from the air cleaner.
TS23781
Installation Procedure
1. Install the MAF sensor on the air cleaner with the
clamp.
2. Install the intake air duct and the clamp on the MAF
sensor.
TS23781
3. Tighten the clamps to secure the MAF sensor to the
intake air duct and the air cleaner.
4. Connect the MAF electrical connector.
5. Connect the negative battery cable.
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