7A±27 AUTOMATIC TRANSMISSION (4L30±E)
Changing Transmission Fluid
There is no need to change the transmission fluid unless
the transmission is used under one or more of the
following heavy duty conditions.
A. Repeated short trips
B. Driving on rough roads
C. Driving on dusty roads
D. Towing a trailer
If the vehicle is used under these conditions, change the
fluid every 20,000 miles (32,000 km).
1. Place a large drain pan under the oil pan.
2. Remove the transmission oil drain screw (2) and drain
fluid.
3. Tighten drain screw (2).
Torque: 38 Nwm (28 lb ft)
4. Remove the transmission overfill screw (1) and fill
transmission through overfill screw opening, using
DEXRON)±III ATF.
NOTE: Add transmission fluid until it flows out over the
overfill screw opening.
5. Let engine idle until a fluid temperature between 32C
(90F) and 57C (135F) is reached.
6. Add transmission fluid until it flows out over the overfill
screw opening, then close the overfill screw (1).
Torque: 38 Nwm (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.
7. Reset ªOil Life Monitorº data by using Tech 2.
Refer to
Tech 2 OBD II Connection in Transmission
Control System (4L30-E) section.
242R200001
Selector Lever
Inspection
1. Make sure that when the selector lever is shifted from
ªPº to ªLº, a ªclickingº can be felt at each shift position.
Make sure that the gear corresponds to that of the
position plate indicator.
2. Check to see if the selector lever can be shifted as
shown in illustration.
C07RW009
Removal
1. Disconnect battery ground cable.
2. Set ignition Key in ªLOCKº position and selector lever
in ºPº position.
3. Remove knee pads (1), cluster upper cover (2) and
center cluster assembly (3).
740R200021
7A±34
AUTOMATIC TRANSMISSION (4L30±E)
Shift Lock Cable
Removal
1. Set ignition key in ªLOCKº position and selector lever
in ªPº position.
2. Remove knee pads, cluster upper cover, center
cluster assembly, rear console, and front console.
Refer to
Selector Lever in this section.
3. Disconnect inner cable from selector lever assembly
then push claw and disconnect cable assembly.
256R200002
4. Disconnect lock adjust.
256R200003
5. Remove instrument panel lower cover and steering
column cover.6. Remove spring pin and disconnect inner cable.
Disconnect outer cable from bracket.
256RW008
Installation
1. Set ignition key in ªLOCKº position and selector lever
in ªPº position.
2. Connect outer cable to bracket near steering lock.
Connect inner cable to steering lock and install
spring pin.
3. Install steering column cover and instrument lower
cover.
4. Install adjust body of cable assembly to bracket in
selector lever assembly.
Install inner cable to lever, pulling inner cable with
outer cable.
256R200004
7A±35 AUTOMATIC TRANSMISSION (4L30±E)
5. Check that cable moves smoothly, lightly pulling outer
cable rearward.
6. Connect lock adjust, aligning ªTº mark in the ªUpº
position.
256R200003
7. About following installation steps, refer to Selector
Lever in this section.
8. Check the shift lock operation:
a. Selector lever should not be moved out of ªPº
position with ignition key in ªLockº position.
b. Selector lever can be moved out of ªPº position with
ignition key in ªONºposition only when brake pedal
is depressed.
c. ignition key can be turned to ªLOCKº position only
when selector lever is in ªPº position (key can be
pulled out).
9. If a. and c. fail, readjust cable. If b. fails, readjust
connector wiring and brake pedal switch.
Mode Switch
Removal
1. Place selector lever in neutral.
2. Disconnect battery ground cable.
3. Remove mode switch cover (1) (V6).
4. Disconnect selector lever (2) from the mode switch.
5. Remove bracket with cable (3).
6. Disconnect transmission harness from the mode
switch connector (4).
7. Remove bracket with mode switch connector from
the transmission case.
8. Remove mode switch connector (4) from the bracket
(5).
9. Remove two mode switch bolts and nut then remove
mode switch (6).
210RW014
TRANSMISSION CONTROL SYSTEM (4L30±E)7A1±9
Winter Drive Mode
1.Operation
The winter switch will operate when switched on after
all of the following conditions are present:
Conditions:
a. The select lever position is ªDº range only.
b. Vehicle speed is 7 mph (11 km/h) or less.
c. Transmission oil temperature is 130C (266F) or
less.
d. Accelerator opening is at 8% or less.
2.Cancel Release
1. Cancellation by driver
a. Turning off the winter drive mode switch
b. Shifting select position to ª3º, ª2º, or ªLº (winter
drive mode is not canceled by selecting ªNº, ªRº,
or ªPº).
c. Ignition key is turned off.
2. Automatic cancellation
a. When vehicle runs at 21mph (34 km/h) or more
for 1 second or more
b. When transmission oil temperature reaches
130C (266F) or above
NOTE: The mode returns to normal drive mode or power
drive mode after the winter drive mode is canceled.
Backup Mode
If a major system failure occurs which could affect safety
or damage the transmission under normal vehicle
operation, the diagnostic system detects the fault and
overrides the Powertrain Control Module (PCM).
The ªCHECK TRANSº light flashes to alert the driver, and
the transmission must be manually shifted as follows:
Select lever position
Gear Ratio Selected
D4 (Fourth)
Manual 34 (Fourth)
Manual 23 (Third)
Manual L1 (First)
RReverse
Shifts are firmer to prevent clutch slip and consequent
wear. The fault should be corrected as soon as possible.
TRANSMISSION CONTROL SYSTEM (4L30±E)7A1±11
Diagnosis
Electronic Diagnosis
How To Diagnose The Problem
1. To avoid incorrect diagnostics, this book needs to be
followed accurately. Unless stated, do not jump
directly to a section that could contain the solution.
Some important information may be missed.
2. The sections in CAPITALS and bold are the main
sections that can be found in the contents.
3. The GO TO ªSECTIONº means to continue to check
going to the ªsectionº.
4. The GO THROUGH ªSECTIONº means to go
through the ªsectionº and then to go back to the place
the GO THROUGH was written.
5. BASIC ELECTRIC CIRCUITS:
You should understand the basic theory of electricity.
This includes the meaning of voltage, amps, ohms,
and what happens in a circuit with an open or shorted
wire. You should also be able to read and understand
wiring diagrams.
Check Trans Indicator
Find CHECK TRANS indicator and verify if it is
A. Flashing: GO TO DIAGNOSTIC CHECK.
B. Staying on: GO THROUGH CHECK TRANS
CHECK.
C. Is never ON when the ignition key is turned on: GO
THROUGH CHECK TRANS CHECK
D. Is ON during 2 seconds at ignition but OFF after:
Normal operation. No DTC or malfunction.
821R200014
Diagnostic Check
This test determines if the transmission or its input or
output connections or sensors are failing.
1. Connect the Tech 2: GO THROUGH Tech 2 OBD II
CONNECTION.2. Turn on the ignition but not the engine.
3. Push ªF0º on Tech 2 to see the Diagnostic Trouble
Code (DTC):
4. Do you have a DTC?
YES: write down all code numbers and do the DTC
CHECK
NO: the DTC can not help you finding the problem.
1. GO THROUGH ªCHECK TRANSº CHECK
2. If it is flashing and the flash is 0.2 seconds ON and
0.2 seconds OFF, this means that you should
have a DTC stored. Please recheck GO TO
DIAGNOSTIC CHECK and if you find the same
problem, replace the Powertrain Control Module
(PCM).
Normal
C07R200005
Abnormal
C07R200006
TRANSMISSION CONTROL SYSTEM (4L30±E)7A1±17
Diagnostic Trouble Codes
The purpose of the ªDiagnostic Trouble Codesº mode is to
display stored PCM trouble codes.
When ªDiagnostic Trouble Codesº is selected an
ªApplication Menuº screen appears.
Clear DTC Information
The purpose of the ªClear DTC Informationº mode is to
command the clearing of stored PCM trouble codes.
When ªClear DTC Informationº is selected, a ªClear DTC
Informationº, warning screen appears. This screen
informs you that by cleaning DTC's, ªall stored DTC
information in controller will be erasedº.
Do you want to clear DTC's (Yes/No).
Press either the Yes or No key when answering.
After clearing codes, confirm system operation by test
driving the vehicle.
Allow the vehicle to shift through all four forward gears in a
manner which attempts to repeat the failure condition.
NOTE: When the trouble has not been repaired and the
trouble code cannot be erased, check the vehicle again.
DTC Information
When ªDTC Informationº is selected, an ªApplication
Menuº appears with a list of DTC information function
keys addressing DTC specifics and their origins.
Function key selections may vary for particular vehicle
and/or system.
Data Display
The purpose of the ªData Displayº mode is to
continuously monitor data parameters.
The current actual values of all important sensors and
signals in the system are display through F1 mode.
When ªData Displayº is selected an ªApplication Menuº
appears. Please select either ªEngineº or ªTransmission
Data Displayº.
See ªTransmission Dataº on next page.
Snapshot
When ªSnapshotº is selected an ªApplication Menuº
appears.
When ªTransmission Snapshotº application is selected
from the ªApplication Menuº, a ªSnapshot Menuº
appears, displaying several options. ªSnapshotº options
may vary from one system to another.
ªSnapshotº allows a recording of all vehicle parameters.
There parameters may then be replayed at a future point
in time.
This action allows you to focus on making the condition
occur, rather than trying to view all of the data in
anticipation of the fault. The snapshot will collect
parameter information around a trigger point that you
select.
When a snapshot is taken. It is recorded onto the
PCMCIA memory card. When the Tech 2 is powered
down. Snapshots are not lost.
Actuator Tests
The purpose of ªActuator Testsº mode is to check for
correct operation of electronic system actuators.Lamps
You can operate the lamps by pressing the ON and OFF
buttons.
Preconditions: none
Solenoid
Solenoid 1-2/3-4, Solenoid 2-3, TCC Solenoid
You can operate the solenoids by pressing the ON and
OFF buttons.
Preconditions: P±N position, no vehicle speed, no engine
speed
Band Apply Solenoid
You can operate the solenoid by pressing the ON and
OFF buttons.
Preconditions: P-N position, idle engine speed, no vehicle
speed.
Pressure Control Solenoid (PCS)
You can set desired PCS Current using the ªIncrementº
(+25) and ªDecrementº (±25) button. The PC Solenoid
Data informs about PCS Current, Pressure and Duty
Cycle.
Preconditions: P±N position, no engine speed, no vehicle
speed
Reset Oil Life Monitor
Displays parameter ªOil Life Monitorº and resets to 100%
if Yes-button is pressed on Reset-question. ªNoº leaves
test.
Preconditions: no vehicle speed, no engine speed
NOTE:
Freeze Frame (Powertrain DTC A/B Type)
Freeze Frame is an element of the Diagnostic Manage-
ment System which stores various vehicle information at
the moment an emissions-related fault is stored in
memory and when the MIL is commanded on. These data
can help to identify the cause of a fault. Refer to
Storing
And Erasing Freeze Frame Data
for more detailed in-
formation.
Failure Records (Powertrain DTC C/D Type)
Failure Records data is an enhancement of the OBD II
Freeze Frame feature. Failure Records store the same
vehicle information as does Freeze Frame, but it will store
that information for any fault which is stored in on-board
memory, while Freeze Frame stores information only for
emission-related faults that command the MIL on.
8A±2LIGHTING SYSTEM
Removal and Installation 8A±17. . . . . . . . . . . . . . .
Dimmer´Passing Switch
(Combination Switch) 8A±17. . . . . . . . . . . . . . . . . . .
Removal and Installation 8A±17. . . . . . . . . . . . . . .
Front Door Switch 8A±17. . . . . . . . . . . . . . . . . . . . . . .
Removal 8A±17. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8A±17. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rear Door Switch 8A±18. . . . . . . . . . . . . . . . . . . . . . .
Removal 8A±18. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8A±18. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tailgate Lock Switch 8A±18. . . . . . . . . . . . . . . . . . . . .
Removal 8A±18. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8A±18. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Key Remind Switch (Starter Switch) 8A±19. . . . . . . Removal and Installation 8A±19. . . . . . . . . . . . . . .
Hazard Warning Light Switch 8A±19. . . . . . . . . . . . .
Removal 8A±19. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8A±19. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Stoplight Switch 8A±20. . . . . . . . . . . . . . . . . . . . . . . . .
Removal and Installation 8A±20. . . . . . . . . . . . . . .
Turn Signal Light Switch
(Combination Switch) 8A±20. . . . . . . . . . . . . . . . . . .
Removal and Installation 8A±20. . . . . . . . . . . . . . .
Illumination Controller 8A±20. . . . . . . . . . . . . . . . . . . .
Removal 8A±20. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8A±20. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Main Data and Specifications 8A±21. . . . . . . . . . . . .
Service Precaution
WARNING: THIS VEHICLE HAS A SUPPLEMENTAL
RESTRAINT SYSTEM (SRS). REFER TO THE SRS
COMPONENT AND WIRING LOCATION VIEW IN
ORDER TO DETERMINE WHETHER YOU ARE
PERFORMING SERVICE ON OR NEAR THE SRS
COMPONENTS OR THE SRS WIRING. WHEN YOU
ARE PERFORMING SERVICE ON OR NEAR THE SRS
COMPONENTS OR THE SRS WIRING, REFER TO
THE SRS SERVICE INFORMATION. FAILURE TO
FOLLOW WARNINGS COULD RESULT IN POSSIBLE
AIR BAG DEPLOYMENT, PERSONAL INJURY, OR
OTHERWISE UNNEEDED SRS SYSTEM REPAIRS.CAUTION: Always use the correct fastener in the
proper location. When you replace a fastener, use
ONLY the exact part number for that application.
ISUZU will call out those fasteners that require a
replacement after removal. ISUZU will also call out
the fasteners that require thread lockers or thread
sealant. UNLESS OTHERWISE SPECIFIED, do not
use supplemental coatings (Paints, greases, or other
corrosion inhibitors) on threaded fasteners or
fasteners joint interfaces. Generally, such coatings
adversely affect the fastener torque and the joint
clamping force, and may damage the fasteners.
When you install fasteners, use the correct
tightening sequence and specifications. Following
these instructions can help you avoid damage to
parts and systems.
LIGHTING SYSTEM8A±19
Key Remind Switch (Starter Switch)
Removal and Installation
Refer to Lock Cylinder in Steering section.
Hazard Warning Light Switch
Removal
1. Disconnect the battery ground cable.
2. Remove the center cluster assembly (1).
Refer to
Instrument Panel Assembly in Body
Structure
section.
3. Remove the hazard warning switch (2).
Disconnect the switch connector.
To remove the switch, push the lock from the back
side of the center cluster assembly.
825R200026
Installation
To install, follow the removal steps in the reverse order.