1998 ISUZU TROOPER Service Repair Manual

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Page 1417 of 3573

ISUZU TROOPER 1998 Service Repair Manual 6E±300
ENGINE DRIVEABILITY AND EMISSIONS
4. Disconnect the red, white, and blue electrical
connectors at the PCM.
5. Remove the two screws in the front of the PCM.
6. Remove the one screw at the left

6E±300
ENGINE DRIVEABILITY AND EMISSIONS
4. Disconnect the red, white, and blue electrical
connectors at the PCM.
5. Remove the two screws in the front of the PCM.
6. Remove the one screw at the left rear of the PCM.
7. Pull the PCM straight out from the dashboard.
TS23757
Installation Procedure
1. Insert the PCM into the dashboard.
Line up the holes in front for the mounting screws.
2. Install the PCM with two screws in the front and one
screw at the left rear.
3. Plug the red, white, and blue connectors into the
appropriate sockets.
TS23757
EEPROM
General Description
The Electronically Erasable Programmable Read Only
Memory (EEPROM) is a permanent memory that is
physically soldered within the PCM. The EEPROM
contains program and calibration information that the
PCM needs to control powertrain operation.
EEPROM Programming
1. Step-up ± Ensure that the following conditions have
been met:
The battery is fully charged.
The ignition is ªON.º
The Vehicle Interface Module cable connection at
the DLC is secure.
2. Program the PCM using the latest software matching
the vehicle. Refer to up-to-date Techline equipment
user's instructions.
3. If the PCM fails to program, Refer to
UBS 98 model
year Immobilizer Workshop Manual.
Functional Check
1. Perform the On-Board Diagnostic System Check.
2. Start the engine and run for one minute.
3. Scan for DTCs using the Tech 2.
Power Steering Pressure (PSP)
Switch
General Description
The Power Steering Pressure (PSP) switch closes when
the hydraulic pressure reaches 3920 + 690 kPa (570 +
100 psi). This causes the PCM to actuate the idle air
control valve in order to prevent the additional load from
slowing down the engine. The switch opens when the
hydraulic pressure drops to 2970 + 560 kPa (430 + 80
psi).
Removal Procedure
1. Disconnect the PSP switch pigtail from the wiring
harness.
The pigtail is permanently attached to the switch.
Do not attempt to remove the wires from the
sensor.
Have a container ready to catch the power steering
fluid that leaks out of the line when the switch is
removed.

Page 1418 of 3573

ISUZU TROOPER 1998 Service Repair Manual 6E±301 ENGINE DRIVEABILITY AND EMISSIONS
2. Remove the PSP switch from the power steering line.
Plug the line to prevent excessive loss of fluid and
possible contamination of the power steering
syst

Page 1419 of 3573

ISUZU TROOPER 1998 Service Repair Manual 6E±302
ENGINE DRIVEABILITY AND EMISSIONS
2. Connect the TP electrical connector.
3. Install the negative battery cable.
Vehicle Speed Sensor (VSS)
Removal Procedure
CAUTION: The VSS is located on the

Page 1420 of 3573

ISUZU TROOPER 1998 Service Repair Manual 6E±303 ENGINE DRIVEABILITY AND EMISSIONS
4. Check the transfer case oil level. Add fluid if
necessary.
5. Connect the negative battery cable.
Air Cleaner/Air Filter
Removal Procedure
1. Loosen the c

Page 1421 of 3573

ISUZU TROOPER 1998 Service Repair Manual 6E±304
ENGINE DRIVEABILITY AND EMISSIONS
2. Install the air filter element in the air cleaner housing.
TS23794
3. Install the air cleaner lid on the MAF sensor and the air
cleaner housing.
TS23973
4.

Page 1422 of 3573

ISUZU TROOPER 1998 Service Repair Manual 6E±305 ENGINE DRIVEABILITY AND EMISSIONS
In order to install a new IAC valve, measure the
distance between the tip of the pintle and the
mounting flange. If that measurement is 28 mm (1.1
in.) or l

Page 1423 of 3573

ISUZU TROOPER 1998 Service Repair Manual 6E±306
ENGINE DRIVEABILITY AND EMISSIONS
4. Remove the accelerator control cable (on the
accelerator pedal end).
TS23982
5. Remove the grommet.
6. Remove the accelerator control cable.
TS23983
Inspec

Page 1424 of 3573

ISUZU TROOPER 1998 Service Repair Manual 6E±307 ENGINE DRIVEABILITY AND EMISSIONS
4. Install the accelerator control cable (on the throttle
valve end).
101RW006
5. Install the adjusting nut.
101RW007
6. Adjust the accelerator cable at the t

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