Remove engine ISUZU TROOPER 1998 Service Repair Manual

7A1±64
TRANSMISSION CONTROL SYSTEM (4L30±E)
DTC P1792 EEPROM Transmission
Side Bad Check Sum
Circuit Description
Transmission Side Read Only Memory (ROM) and
Electronically Erasable Programmable Read Only
Memory (EEPROM) is an electronic circuit that controls
the transmission control in the Powertrain Control Module
(PCM).
This DTC detects a check sum error. This is a type ªCº
DTC.
Conditions For Setting The DTC

Detects check sum error for 1 second.
Action Taken When The DTC Sets

Maximum line pressure.
Immediate landing to 4th gear.

Inhibit TCC engagement.

The PCM will illuminate the CHECK TRANS Lamp.
Conditions For Clearing The MIL/DTC

The PCM will turn off the CHECK TRANS Lamp after
three consecutive ignition cycles without a failure
reported.

The DTC can be cleared from the PCM history by
using a scan tool.

The DTC will be cleared from history when the vehicle
has achieved 40 warmup cycles without a failure
reported.

The PCM will cancel the DTC default actions when
the fault no longer exists and the ignition is cycled ªoffº
long enough to power down the PCM.
DTC P1792 EEPROM Transmission Side Check Bad Check Sum
StepActionYe sNo
11. Install the scan tool.
2. With the engine ªoffº, turn the ignition switch ªonº.
NOTE: Before clearing DTC(s), use the scan tool to record ªFailure
Recordsº for reference, as data will be lost when the ªClear Infoº
function is used.
3. Record the DTC ªFailure Recordsº.
Was DTC P1790 set?
Go to Step 4Go to Step 2
2Was DTC P1792 set?Go to Step 3Ð
31. Remove the PCM. Refer to Powertrain Control Module (PCM)
in Automatic Transmission (4L30±E) section.
2. Using the ITCS, make a reprogramming the transmission
EEPROM.
Was the reprogramming complete?
Go to Step 5Ð
4Replace the PCM.
Is the replacement complete?
Go to Step 5Ð
51. After the repair is complete, use the scan tool to select ªDTCº,
then ªClear Infoº function and operate the vehicle.
2. Review the scan tool ªDTC Infoº.
Has the last test failed or is the current DTC displayed?
Begin diagnosis
again
Go to Step 1
Repair verified
Exit DTC table

7B±6MANUAL TRANSMISSION
Removal
NOTE: Before remove the transmission and transfer
assembly from the vehicle, change the transfer mode to
2WD using push button on dash panel.
1. Remove engine hood.
2. Disconnect battery ground cable.
3. Remove the gear control lever knob.
4. Remove the front console assembly.
5. Remove the grommet assembly.
6. Remove the transmission control lever and transfer
control lever.
235RW014
7. Raise and support the vehicle with suitable jack
stand.
8. Remove transfer protector.
9. Remove the rear propeller shaft.
NOTE: Apply alignment marks on the flange at the both
front and rear side.
(4JX1)
401RW060
10. Remove the front propeller shaft.
NOTE: Apply alignment marks on the flange at both the
front and rear sides.
401RS003
11. Disconnect two oxygen sensor connectors from the
transmission harness (6VE1).
12. Remove the front and 3 way exhaust pipe (6VE1).
Remove the exhaust pipe with catalytic converter
(4JX1).
(4JX1)
150RW041

MANUAL TRANSMISSION7B±9
16. Remove the slave cylinder heat protector.
17. Remove the harness heat protector (6VE1).
(6VE1)
225RW006
18. Remove two transmission harness clamps and
bracket (6VE1).
19. Remove the slave cylinder.
206RW002
20. Remove the two dust cover from transmission case.
21. Support the transfer case with a jack.22. Remove two engine rear mount nuts.
(6VE1)
022RT002
23. Remove third crossmember (6VE1).
24. Remove third crossmember with rear mount rubber
(4JX1).
(4JX1)
022RW013
25. Remove two engine rear mount bolts (6VE1).
26. Remove the rear mount from the transmission
(6VE1).
27. Remove three flywheel under cover (6VE1).

MANUAL TRANSMISSION7B±11
220RW119
Legend
(1) Pressure Plate Assembly
(2) Release Bearing
(3) Wedge Collar
30. Remove the transmission retaining nuts and bolts.
31. Remove the transmission assembly with transfer
case from the vehicle.
NOTE: Remove the transfer case from the transmission
assembly if the transmission disassembly required.
Refer to Transfer Case in Drive Line/Axle section.
Installation
1. Apply a thin coat of molybdenum disulfide grease to
the top gear shaft spline.
2. Slowly operate the transmission jack until the front of
transmission is aligned with the rear of the engine.
The slope of the engine and the transmission must be
the same.
3. Align the top gear shaft spline with the clutch driven
plate spline.
220RS005
4. Install the transmission to the engine.
Tighten the transmission retaining nuts and bolts.

7B±14MANUAL TRANSMISSION
7. Install the engine rear mount to the transmission case
and tighten the fixing bolts specified torque (6VE1).
Torque: 41 N´m (4.2kg´m/30 Ib ft)
8. Install the third crossmember to the frame and tighten
the fixing bolts specified torque.
Torque: 50 N´m (5.1kg´m/37 Ib ft)
9. Tighten the engine rear mount nuts specified torque.
Torque: 50 N´m (5.1kg´m/37 Ib ft)
10. Remove the transmission jack.
11. Apply the grease to top hole portion of the shift fork.
12. Install the slave cylinder and tighten the fixing bolts
specified torque.
Torque: 43 N´m (4.4kg´m/32 Ib ft)
13. Install the clutch dust cover to the clutch housing and
tighten the fixing bolts specified torque.
Torque: 8 N´m (0.8kg´m/69 Ib in)
220RS007
14. Install the slave cylinder heat protector to the slave
cylinder.
15. Install bracket and two transmission harness clamps
to the transmission case (6VE1).
16. Install harness heat protector (6VE1).(6VE1)
225RW006
17. Install four fuel pipe bracket (6VE1).

MUA MODEL 7B1 – 51
REMOVAL AND INSTALLATION
Read this Section carefully before performing any removal and installation procedure. This Section gives
you important points as well as the order of operation. Be sure that you understand everything in this
Section before you begin.
Important Operations – Removal
Battery Cable
Disconnect the negative (–) cable from the battery
terminal.
Engine Hood
Apply setting marks to the engine hood and the engine
hood hinges before removing the engine hood.
Gear Shift Lever and Transfer Change Lever
1. Place the gear shift lever in the neutral position.
2. Place the transfer change lever in the “H” position.
3. Remove the gear shift lever knob and transfer
change lever konb.
4. Remove the center console assembly and front
console assembly.
5. Remove the grommet and dust cover.
6. Remove the gear shift lever cover bolt.
7. Remove the gear shift lever.
8. Remove the transfer change lever retainer bolts.
9. Remove the transfer change lever and O-ring.
Note:
Cover the shift lever and change lever holes to prevent
the entry of foreign material into the transmission.
Lifting the Vehicle
1. Jack up the vehicle.
2. Place chassis stands at the front and the rear of the
vehicle.
Transfer Case Protector (Except 00 Year or Subsequent
ones)
Remove the transfer case protector from the transmission
mounting member and the side member.
235RT004

MUA MODEL 7B1 – 53
Front Propeller Shaft
Remove the splined yoke flange bolt at the transfer case
side.
Do not allow the splined yoke to fall away from the front
propeller shaft.
If the splined yoke should fall away from the front
propeller shaft, align the setting marks
3on the splined
yoke 1and the propeller shaft 2to reassemble the two
parts.
The setting marks 3are punched circles approximately 3
mm (0.12 in) in diameter.
TDC Sensor (4JA1TC Model)
Disconnect the TDC sensor from the transmission
housing.
Harness Connector
Disconnect the 4WD switch connectors, back up light
switch connector and the speedometer sensor connector.
220R200001
Slave Cylinder
Remove the slave cylinder from the transmission case.
220LV019
Engine LIfting Hanger
1. Attach the engine lifting hanger to the front portion of
the engine.
2. Attach the lifting wire to both ends of the engine
lifting hange.

7C±14CLUTCH
Release Bearing
201RS011
1. Visually check the release bearing for excessive play,
noise and breakage.
2. If any of these conditions are discovered, the release
bearing must be replaced.
3. When replacing the release bearing, replace both the
wedge collar and wire ring at the same time.
201RW010
Legend
(1) Wire Ring
(2) Pressure Plate Assembly
(3) Wedge Collar
(4) T/M Side
(5) Release Bearing
(6) Engine Side
Wedge Collar
201RS013
1. Visually check the surfaces of the wedge collar
making contact with the release bearing for excessive
wear and damage.
2. Replace any exhibiting excessive wear or damage.
Shift Fork
201RS014
1. Visually check the surfaces of the shift fork making
contact with the release bearing for excessive wear
and damage.
2. Remove any minor stepping or abrasion from shift
fork with an oil stone.
3. Replace any exhibiting excessive wear or damage.

8DÐ8 WIRING SYSTEM
5. The wiring harness between engine and chassis
should be long enough (2). Tension of the wire (1) may
causes chafing or damage due to various vibrations.
Splicing Wire
1. If the harness is taped, remove the tape. To avoid wire
insulation damage, use a sewing Òseam ripperÓ
(available from sewing supply stores) to cut open the
harness.
If the harness has a black plastic conduit, simply pull
out the desired wire.
2. Begin by cutting as little wire off the harness as
possible. You may need the extra length of wire later
if you decide to cut more wire off to change the location
of a splice. You may have to adjust splice locations to
make certain that each splice is at least 1Ð1/2Ó
(40 mm) away from other splices, harness branches,
or connectors.
3. When replacing a wire, use a wire of the same size as
the original wire.
Check the stripped wire for nicks or cut stands. If the
wire is damaged, repeat the procedure on a new
section of wire. The two stripped wire ends should be
equal in length.
4. Select the proper clip to secure the splice.
To determine the proper clip size for the wire being
spliced, follow the directions included with your clips.
Select the correct anvil on the crimper. (On most
crimpers your choice is limited to either a small or
large anvil.)
Overlap the two stripped wire ends and hold them
between your thumb and forefinger as shown in the
figure.
The center the spline clip (1) under the stripped wires
and hold it in place.cOpen the crimping tool to its full width and rest one
handle on a firm flat surface.
cCenter the back of the splice clip on the proper anvil
and close the crimping tool to the point where the back
of the splice clip touches the wings of the clip.
cMake sure that the clip and wires are still in the correct
position. Then, apply steady pressure until the
crimping tool closes as shown in the figure.
2
11

METER AND GAUGE8E–15
Vehicle Speed Sensor
Removal
1. Disconnect the battery ground cable.
2. Disconnect the connector, remove the vehicle speed
sensor body by rotating it and then remove the vehicle
speed sensor(1).
826RS009
Installation
To install, follow the removal steps in the reverse order,
noting the following point.
1. Tighten the vehicle speed sensor to the specified
torque.
Torque: 27 N·m (2.8 kg·m/20 lb ft)
Fuel Tank Unit
Removal
1. Disconnect the battery ground cable.
2. Remove the fuel tank(1).
Refer to the Fuel Tank removal steps in Engine
section
3. Disconnect the connectors, remove five screws and
then remove the fuel tank unit(2).
140RS006
Installation
To install, follow the removal steps in the reverse order.