engine ISUZU TROOPER 1998 Service Repair Manual

6J – 6 INDUCTION
INSPECTION AND REPAIR
Make the necessary adjustments, repairs and part
replacements if excessive wear or damage is
discovered during inspection.
Minor servicing operations are described in this section.
Contact the nearest IHI SERVICE FACILITY for major
repairs and maintenance.
Refer to IHI SERVICE NETWORK at the end of this
section for the location of your area’s IHI SERVICE
FACILITY.
Turbine shaft end play.
1) Set a dial indicator to the turbine shaft end.
2) Apply a force of 11.8 N (1.2 kg / 2.6 lb)
alternately to the compressor wheel and and the
turbine wheel end.
3) Read the dial indicator.
Turbine End Play
Standard: 0.03 – 0.06 mm (0.0012 – 0.0024 in)
Limit: 0.09 mm (0.0035 in)Turbine shaft and bearing clearance
1) Set a dial indicator to the turbine shaft center
through the center housing oil drain port.
2) Move the turbine shaft from side to side.
3 Read the dial indicator.
Turbine Shaft and Bearing Clearance
Standard: 0.056 - 0.127 mm (0.0022 - 0.0050 in)
Limit: 0.14 mm (0.0055 in)
Waste gate operation
1) Remove hose from waste gate actuator side and
install pressure gauge (1) to the waste gate
actuator.
2) Operate pump of pressure gauge while engine is
stopped.
3) Read pressure at the control rod (2) move 2mm.
Pressure: 106 – 115 kPa
(796 – 862 mmHg/ 15.4 – 16.7 PSi)
036RW008
036RW010
036RW009
036RW007

INDUCTION 6J – 7
Legend
(1) Pressure gauge
(2) Waste gate control rod
4) Check for cracks or breaks on the hose, if a
problem is found, the hose must be replaced.
CAUTION: Do not apply more than 120 Kpa (900
mmHg / 18.7 PSi) to waste gate actuator.
INSTALLATION
1. Install turbocharger assembly to exhaust manifold,
tighten to the specified torque.
Torque: 27 N·m (2.7 kg·m / 19.5 lb ft)2. Install exhaust valve assembly to outlet of
turbocharger, tighten bolts to the specified torque.
Torque: 27 N·m (2.7 kg·m / 19.5 lb ft)
3. Install heat protector.
4. Water inlet pipe.
1) Tighten water inlet pipe with new gasket.
Torque: 9 N·m (0.9 kg·m / 6.5 lb ft)
5. Oil drain pipe.
1) Tighten oil drain pipe with new gasket.
Torque: 9 N·m (0.9 kg·m / 6.5 lb ft)
6. Oil inlet pipe.
1) Apply about 100 cc engine oil to turbocharger
housing before installing the oil pipe.
2) Turn the turbine shaft by hand to lubricate the
bearing.
3) Install the oil inlet pipe with a new gasket, tighten
bolt to the specified torque.
Torque: 22 N·m (2.2 kg·m / 15.9 lb ft) For M10
Torque: 54 N·m (5.5 kg·m / 39.8 lb ft) For M14
2
1
036RW011
For Europe
025R200007
For Europe
025R200006

6J – 8 INDUCTION
7. Water inlet pipe.
1) Install water inlet pipe with a new gasket, tighten
bolts to the specified torque.
Torque: 9 N·m (0.9 kg·m / 6.5 lb ft)
8. Install intercooler assembly.
Refer to “Intercooler” in this manual.
9. Install air cleaner cover with air duct.
10. Fill engine coolant to full level.
11. Install battery and connect battery cable.
For Europe
025R200007

INDUCTION 6J – 11
INTAKE MANIFOLD
REMOVAL
1. Drain engine coolant and remove water hose from
thermostat housing
2. Remove intercooler assembly.
3. Remove bracket fixing bolt of oil level gauge guide
tube.
4. Remove PCV hose.
5. Remove hoses from EGR valve, EGR vacuum
sensor and outlet of heater unit.
6. Disconnect harness connector from MAP sensor,
EGR vacuum sensor, ETC sensor, Water
temperature unit, IAT sensor and EVRV.
7. Remove high pressure oil pipe.
8. Remove two way check valve.
9. Remove fuel pipe.
10. Remove fixing bolts and nuts of intake manifold,
remove intake manifold assembly.
Legend
(1) Intake manifold
(2) Fixing portion of throttle valve
(3) EGR passage
(4) EGR valve
For Europe
2
1
3
3 1 42
Legend
(1) Intake Manifold
(2) Throttle Valve Assembly
(3) EGR Valve
(4) Gasket
025R200005
3124
025RW031

6J – 12 INDUCTION
INSPECTION AND RAPAIR
1. Visually check for cracks/clogs inside intake
manifold.
2. If foreign material is observed, it should be taken
out, and if there are some cracks on the intake
manifold, it must be replaced.
INSTALLATION
1. Install the intake manifold assembly, tighten bolts
and to the specified torque.
Torque: 20 N·m (2.0 kg·m / 14.5 lb ft) for bolt
Torque: 20 N·m (2.0 kg·m / 14.5 lb ft) for nut
2. Install fuel pipe.
Torque: 4 N·m (0.4 kg·m / 2.9 lb ft) for M16 nut
(Apply engine oil)
Torque: 13 N·m (1.3 kg·m / 9.4 lb ft) for M10 cap nut
Torque: 14 N·m (1.4 kg·m / 10 lb ft) for M10
(Apply engine oil)
3. Install two way check valve.
Torque: 20 N·m (2.0 kg·m / 14.5 lb ft)
4. Fill with about 300 cc of engine oil from the high
pressure oil pipe installation port of the oil rail using
an oil filler.
If assembled without filling the oil rail with oil, the
time for engine starting will be longer.
5. Install high pressure oil pipe, then tighten sleeve nut
to the specified torque.
Torque: 29 N·m (3.0 kg·m / 21.7 lb ft)
6. Reconnect harness connector to MAP sensor, EGR
vacuum sensor, ETC sensor, Water thermo unit,
IAT sensor and EVRV sensor.
7. Install hoses to EGR valve, EGR vacuum sensor
and Water outlet of heater.
8. Connect PCV hose.
9. Install oil level gauge guide and fix it.
10. Install intercooler assembly.
Refer to “Intercooler” in this manual.
11. Install water hose to thermostat housing and fill with
engine coolant.
Model of Turbocharger IHI RHF5
Turbine Maximum Speed 180,000 rpm
Maximum Inlet Gas Temperature 800 °C (1472 °F)
Vibration Peak (G) criteria Maximum 4 (G) at Turbine Rotor Speed 140,000 rpm
Tolerance Limit of Compressor Blade Height Less then 0.5 mm (0.0197 in)
MAIN DATA AND SPECIFICATIONS

7A±5 AUTOMATIC TRANSMISSION (4L30±E)
Normal Operation Of 1998 4L30±E
Transmission
Torque Converter Clutch (TCC)
Application Conditions:
The TCC is normally applied in 2nd, 3rd and 4th gears
only when all of the following conditions exist:
Ð The engine coolant temperature is above 70
C
(158
F).
Ð The brake pedal is released.
Ð The shift pattern requests TCC apply.
Moreover, TCC is always applied in 2nd, 3rd and 4th
gears when the transmission oil temperature is above
135
C (275
F).
This mode should be canceled at 125
C (257
F).
ATF Warning Lamp
The ATF warning lamp will be constantly on (not flashing)
if the transmission oil temperature is above 140
C
(284
F).
The ATF warning lamp goes off again when the
transmission oil temperature is below 130
C (266
F).
Special Shift Pattern When The Engine Is
Cold:
A special shift pattern is activated when the engine
coolant temperature is below 70
C (158
F). (3±4 shifts,
for example, are delayed for small throttle openings and
will occur a few MPH higher.)
Diagnosis
Introduction
The systematic troubleshooting information covered by
this Section offers a practical and systematic approach to
diagnosing 4L30±E transmission, using information that
can be obtained from road tests, electrical diagnosis, oil
pressure checks or noise evaluation.
The key to correcting a complaint is to make use of all of
the available symptoms and logically letting them direct
you to the cause.
When dealing with automatic transmission complaints, it
is best to gather as many symptoms as possible before
making the decision to remove the transmission from the
vehicle.
Frequently, the correction of the complaint does not
require removal of the transmission from the vehicle.
Driver Information
To analyze the problem fill out a complete description of
the owner's complaint.
Please draw a circle around the right information and
complete the following form. (The next page is an
example of a completed form). You can draw a circle
around many numbers if you are not sure.

7A±10
AUTOMATIC TRANSMISSION (4L30±E)
Checking Transmission Fluid Level
and Condition
Checking fluid level and condition (color and odor) at
regular intervals will provide early diagnosis information
about the transmission. This information may be used to
correct a condition that, if not detected early, could result
in major transmission repairs.
IMPORTANT:When new, automatic transmission fluid
is red in color. As the vehicle is driven, the transmission
fluid will begin to look darker in color. The color may
eventually appear light brown.
A dark brown color with burnt odor may indicate
excessive fluid deterioration and signal a need for fluid
change.
Fluid Level
When adding or changing fluid, use only DEXRON )±III.
Refer to Maintenance and Lubrication in General
Information section for maintenance information and
servicing interval.
CAUTION: DO NOT OVERFILL.
Overfilling will cause foaming, loss of fluid, abnor-
mal shifting and possible damage to the transmis-
sion.
1. Park the vehicle on level ground and apply the parking
brake firmly.
2. Check fluid level with engine running at idle.
NOTE: Be sure that transmission fluid temperature is
below 30
C (86
F).
3. Move the selector lever through all gear ranges.
4. Move the selector lever to ªParkº.
5. Let engine idle for 3 minutes and open the overfill
screw (1).
6. Add released transmission fluid until it flows out over
the overfill screw opening.
7. Let engine idle until a fluid temperature between 32
C
(90
F) and 57
C (135
F) is reached, then close the
overfill screw (1).
Torque: 38 Nwm (3.9 kg´m/28 lb ft)
NOTE: To prevent fluid leaks, the overfill screw and oil
drain screws gasket must be replaced each time these
screws are removed.NOTE: Check transmission fluid temperature with scan
tool.
Minimum fluid level " 57
C (135
F)
Maximum fluid level " 32
C (90
F)
242RW003
CAUTION: Do not open overfill screw with engine
stopped.
CAUTION: DO NOT CHECK FLUID LEVEL UNDER
THESE CONDITIONS:

Immediately after driving at sustained highway
speeds.

In heavy city traffic during hot weather.

If vehicle is towing a trailer.
If the vehicle has been operated under these conditions,
shut the engine off and allow the vehicle to ªcoolº for thirty
(30) minutes. After the cool down period, restart the
vehicle and continue from step 2 above.

7A±11 AUTOMATIC TRANSMISSION (4L30±E)
Fluid Condition
FLUID CONDITION
NORMAL*CONTAMINATED
COLORRED OR LIGHT
BROWNBROWNNON±TRANSPAR-
ENT / PINKBROWN
DRAIN RE-
QUIRED?NOYESYESYES
CONTAMINA±
TIONNONEVery small amount of
foreign material in bot-
tom of panContamination by cool-
ant or other sourceLarge pieces of metal
or other foreign materi-
al in bottom of pan
CORRECT
LEVEL AND
CONDITION
1. LOW LEVEL:
A. Add fluid to
obtain proper
level & check for
external leaks.
B. Correct cause of
leak.
2. HIGH LEVEL:
± Remove excess
fluid± Remove both pans
± Change filter
± Flush cooler
± Add new fluid
± Check level± Repair/replace
radiator cooler
± Transmission
overhaul required
± Check for:

Damaged plates
and seals

Contaminated
solenoids
± Flush cooler
± Add new fluid
± Check level± Transmission
overhaul required
± Flush cooler and
cooler lines
± Add new fluid
± Check level
*Fluid should be changed according to maintenance
schedule.
Test Driving
Some 4L30±E automatic transmission complaint will
require a test drive as a part of the diagnostic procedure.
Some codes will not set unless the vehicle is moving. The
purpose of the test drive is to duplicate the customer's
complaint condition and set a current Powertrain Control
Module (PCM) trouble code. Perform this procedure
before each 4L30±E automatic transmission repair, and
again after repairs are made.
IMPORTANT:

Duplicate the condition under which the customer's
complaint was observed.

Depending on the complaint, the line pressure gauge
and the scan tool may be required during the test
drive.

During the test drive, it is important to record all
necessary data from the areas being monitored, for
use in diagnosis. Also listen for and note any unusual
noises.
The following procedure should be used to test drive
4L30±E automatic transmission complaint vehicles:
1. Turn the ignition ON without starting the engine.
Check that the ªCHECK TRANSº lamp comes on for
approximately 2 to 3 seconds and then goes out and
remains out.

If the lamp is flashing, GOTO Check Trans Indicator
in Transmission Control System (4L30±E) section.

If no serial data is present, GOTO OBD System
Check. Refer to Driveability and Emissions in
Engine section.
If the lamp stays ON or stays OFF, GOTO ªCheck
Transº Check in Transmission Control System
(4L30±E) section.
2. Drive the vehicle. During the test drive, be sure that
the transmission achieves normal operating
temperature (approx. 20 minutes).
Allow the transmission to go through all of its gear
ranges, checking shift timing and firmness. Duplicate
the owner's complaint condition as closely as
possible during the test drive.
3. If, during the test drive, the ªCHECK TRANSº lamp
comes on, use the scan tool to check for trouble
codes.
4. If, during the test drive, a problem is felt, but the
ªCHECK TRANSº lamp does not come on and no
trouble codes are present, drive the vehicle with the
PCM disconnected (manually shifting the vehicle).

In Manual L, the vehicle operates in first gear.

In Manual 2, the vehicle operates in third gear.

In Manual 3 or ªDº, the vehicle operates in fourth
gear.
If the problem still exists with the PCM disconnected,
refer to Mechanical/Hydraulic Diagnosis in this
section.
5. If no problem has been found at this point, check all
underhood connections that supply power to the PCM
and ignition fuses. Physically and visually inspect all
the PCM harness connectors for loose or corroded
terminals. Inspect the PCM ground points.

7A±12
AUTOMATIC TRANSMISSION (4L30±E)
Mechanical / Hydraulic Diagnosis Check Trans Indicator Chart
Preform Preliminary Inspection First!
When the ªCHECK TRANSº indicator is flashing, it
indicates that a problem related to the transmission, the
Powertrain Control Module (PCM), or the vehicle harness
has occurred.The system is now operating in a ªBACKUP MODEº
where the risk of further damaging the transmission has
been reduced. The vehicle may be shifted manually.
If the initial problem is intermittent or seldom, switching
the engine OFF/ON might allow normal operation again
until the problem reoccurs.
F07RT013

7A±13 AUTOMATIC TRANSMISSION (4L30±E)
Mechanical / Hydraulic Diagnosis Symptoms Index
Perform Preliminary Inspection First!
CHART
SYMPTOMS
1NO ENGINE START IN NEUTRAL OR PARK
2NO FORWARD GEARS IN ANY RANGE/NO REVERSE
3NO ENGINE BRAKE IN ANY RANGE
4POOR SHIFTING IN ALL GEARS (ALL HARSH OR ALL SOFT)
5aDELAYS IN DRIVE AND REVERSE
5bDELAYS IN REVERSE ONLY
6DIAGNOSTIC TROUBLE CODE (DTC) P0730
7HARSH 1±2 SHIFT
8HARSH 3±4 SHIFT
9a3±2 DOWNSHIFT COMPLAINT
9bHARSH SHIFT WHEN SHIFTING INTO ªDº OR ACCELERATING FROM STOP
9cCOASTDOWN HARSH SHIFT OR CLUNK AT 3±2 DOWNSHIFT
10INTERMITTENT 4TH TO 2ND GEAR DOWNSHIFT AT STEADY SPEED
11ENGINE FLARE AT SHIFTING DURING TURNING ONLY
12ENGINE FLARE DURING 1±2 OR 2±3 SHIFT
13SHUDDER ONLY DURING TORQUE CONVERTER CLUTCH (TCC) APPLYING
14POSSIBLE CAUSES OF TRANSMISSION NOISE
15aPOSSIBLE CAUSES OF LOW LINE PRESSURE
15bPOSSIBLE CAUSES OF HIGH LINE PRESSURE
16POSSIBLE CAUSES OF TRANSMISSION FLUID LEAKS
NOTE: Numbers with parenthesis on the following charts
refer to Parts List at end of this section.
Chart 1: No Engine Start In Neutral Or Park
StepActionYe sNo
1Does engine start when shift lever moved from drive to neutral
mostly in hot condition?
Go to Step 2Go to Step 3
2Does engine start in park at any condition?Re±test vehicleGo to Step 4
3Does engine also not start in neutral when shift lever moved from
park to neutral?
Go to Step 4Go to Step 5
4Check mode switch (63) setting. Readjust if necessary.
Problems fixed?
Re±test vehicleGo to Step 5
5Check start circuit of mode switch (63) open in neutral.
Was open found?Locate and repair
open(s)Replace mode
switch (63)