2002 ISUZU AXIOM clutch

7A±93 AUTOMATIC TRANSMISSION (4L30±E)
Special Tools
ILLUSTRATIONTOOL NO.
TOOL NAME
J±23075
Spring compressor
(For servo piston)
J±38450±A
Third clutch snap ring
compressor
J±23075±12
Third clutch spring
compressor adapter
(Use with J±23075)
J±23084
Third clutch piston
installer
J±23327
Third clutch spring
compressor
J±23080±A
Second clutch piston
installer
ILLUSTRATIONTOOL NO.
TOOL NAME
J±23085±A
Selective washer
gauging tool
J±23327±90
Fourth clutch spring
compressor
(Use with J±23327)
J±38553
3/4 Accumulator piston
fitter
J±41096
Cover remover
(Use with J±38584)
J±38584
Slide hammer adapter
(Use with J±23907)
J±38554
Fourth clutch piston fitter

7A±94
AUTOMATIC TRANSMISSION (4L30±E)
ILLUSTRATIONTOOL NO.
TOOL NAME
J±38588
Guide pins; adapter
case to main case
J±38555
Overrun clutch piston
seal installer set
J±3387±2
Guide pins; gasket and
transfer plate to valve
body
J±25022
Turbine shaft puller
(Use with J±24773±1)
J±23129
Oil seal remover
(Use with J±23907
and J±38584)
J±38557
Oil pump centering tool
ILLUSTRATIONTOOL NO.
TOOL NAME
J±23082±01
Oil pump rotation tool
J±25025±B
Guide pins; valve body
to main case
J±38428
Servo piston fitter
J±23327±91
Overrun clutch spring
compressor
J±38559±A
3/4 Accumulator piston
cover compressor
J±8763±02
Holding fixture

7A±98
AUTOMATIC TRANSMISSION (4L30±E)
Pump Assembly
241RY003
Legend
(201) Gear, Oil Pump Drive
(202) Gear, Oil Pump Driven
(203) Pin, Plug Converter Clutch Control
(204) Plug, Converter Clutch Control Valve
(205) Spring, Converter Clutch Control Valve
(206) Valve, Converter Clutch Control
(207) Ring, Snap/Throttle Signal Accumulator
(208) Seat, Spring/Throttle Signal Accumulator
(209) Spring, Throttle Signal Accumulator
(210) Piston, Throttle Signal Accumulator
(211) Pin, Boost Valve Sleeve
(212) Sleeve, Boost Valve
(213) Valve, Boost
(214) Seat, Spring/Pressure Regulator Valve(215) Spring, Pressure Regulator Valve
(216) Seat, Spring/Pressure Regulator Valve
(217) Valve, Pressure Regulator
(218) Isolator Valve
(219) Spring, Isolator
(220) Valve, Converter Clutch Regulator
(221) Spring, Converter Clutch Regulator
(222) Sleeve, Converter Clutch Regulator
(223) Pin, Retainer Sleeve
(224) Valve, Enable
(225) Spring, Enable Valve
(226) Spring Guide, Enable Valve
(227) Pin, Enable Valve
(228) Pump Assembly
(229) Seal Ring, Plug

7A±100
AUTOMATIC TRANSMISSION (4L30±E)
243RY002
Legend
(401) Body, Valve/Adapter Case
(402) Screw, Solenoid Force Motor
(403) Retainer, Force Motor
(404) Solenoid, Force Motor
(405) Plug, 3±4 Accumulator
(406) Plug and Spring Retainer
(407) Valve, 3±4 Accumulator
(409) Valve, 3±4 Accumulator Control(410) Spring, Feed Limit Valve
(411) Ring, Retainer
(412) Valve, Feed Limit
(413) Seal, O±Ring Plug Filter
(414) Plug, Screen
(415) Screen Assembly, Force Motor
(416) Solenoid, Torque Converter Clutch, PWM
(417) Retainer, Screen Plug
(418) Bracket, PWM Solenoid

7A±101 AUTOMATIC TRANSMISSION (4L30±E)
Overdrive Internal Components
252RW003
Legend
(501) Retainer, 4th Clutch
(502) Plate, 4th Clutch (Steel)
(503) Plate Assembly, 4th Clutch (Lined)
(504) Retainer And Ball Assembly, Check Valve
(505) Seal, O±Ring/Turbine Shaft
(506) Shaft, Turbine
(508) Ring, Oil Seal/Turbine Shaft
(510) Housing, Overrun Clutch
(513) Piston, Overrun Clutch
(514) Spring, Overrun Clutch Release
(515) Retainer, Release Spring/Overrun Clutch
(516) Roller Assembly, Overdrive Clutch
(517) Cam, Overdrive Roller Clutch
(518) Ring, Snap/Overrun Clutch Hub
(519) Gear, Overdrive Sun(520) Plate, Waved/Overrun Clutch
(521) Plate, Overrun Clutch (Steel)
(522) Plate Assembly, Overrun Clutch (Lined)
(523) Plate, Backing/Overrun Clutch
(524) Ring, Snap/Overrun Clutch Housing
(525) Carrier Assembly, Overdrive Complete
(526) Ring, Snap/Turbine Shaft/Carrier
(527) Bearing Assembly, Thrust
(528) Gear, Overdrive Internal
(529) Washer, Thrust/Internal Gear/Support
(530) Ring, Snap/Adapter/4th Clutch Spring
(531) Retainer and spring assembly, 4th clutch
(532) Piston, 4th Clutch
(533) Seal, 4th Clutch Piston (Inner)
(534) Seal, 4th Clutch Piston (outer)

7A±102
AUTOMATIC TRANSMISSION (4L30±E)
Internal Components
247RW002
Legend
(608) Seal, Reverse Clutch Piston (Inner)
(609) Seal, Reverse Clutch Piston (Outer)
(610) Piston, Reverse Clutch
(611) Spring, Piston Clutch
(612) Seat, Spring/Reverse Clutch
(613) Ring, Retaining
(614) Plate, Waved/Reverse Clutch
(615) Plate, Reverse Clutch (Steel)
(616) Plate Assembly, Reverse Clutch (Lined)
(617) Plate, Reverse Clutch Pressure/Selective
(618) Drum Assembly, 2nd Clutch
(620) Seal, 2nd Clutch Piston (Inner)
(621) Seal, 2nd Clutch Piston (Outer)
(622) Piston, 2nd Clutch
(623) Seat, Spring/2nd Clutch
(625) Plate, Waved/2nd Clutch
(626) Plate, 2nd Clutch (Steel)(627) Plate Assembly, 2nd Clutch (Lined)
(628) Spacer, 2nd Clutch
(629) Ring, Retaining
(630) Gear, Ring
(631) Washer, Thrust/2nd Clutch/3rd Clutch
(632) Thrust Washer, Clutch Hub
(634) Drum Assembly, 3rd Clutch
(635) Seal, 3rd clutch piston (Inner)
(636) Washer, Retaining
(637) Seal, 3rd Clutch Piston (Outer)
(638) Piston 3rd Clutch
(639) Seat, Spring/3rd Clutch
(640) Ring, Retaining
(641) Plate, Spring Cushion/3rd Clutch
(642) Plate, 3rd Clutch (Steel)
(643) Plate Assembly, 3rd Clutch (Lined)
(644) Washer, Thrust/Input Sun
(645) Bearing, Input Shaft/Gear Assembly

TRANSMISSION CONTROL SYSTEM (4L30±E)7A1±1
AXIOM
TRANSMISSION
TRANSMISSION CONTROL SYSTEM (4L30±E)
CONTENTS
Service Precaution 7A1±2. . . . . . . . . . . . . . . . . . . . . .
General Description 7A1±2. . . . . . . . . . . . . . . . . . . . .
Electronic Control Diagram 7A1±3. . . . . . . . . . . . .
Powertrain Control Module (PCM) 7A1±4. . . . . . .
Control System Diagram 7A1±5. . . . . . . . . . . . . . .
Shift Control 7A1±6. . . . . . . . . . . . . . . . . . . . . . . . . .
Band Apply Control 7A1±6. . . . . . . . . . . . . . . . . . . .
Torque Converter Clutch Control
(Electronically Controlled Capacity
Clutch = ECCC) 7A1±6. . . . . . . . . . . . . . . . . . . . . .
Line Pressure Control 7A1±6. . . . . . . . . . . . . . . . . .
On±Board Diagnostic System 7A1±6. . . . . . . . . . .
Fail Safe Mechanism 7A1±6. . . . . . . . . . . . . . . . . . .
Torque Management Control 7A1±6. . . . . . . . . . . .
ATF Warning Control 7A1±6. . . . . . . . . . . . . . . . . . .
Reverse Lock Out Control 7A1±6. . . . . . . . . . . . . .
Downhill Control 7A1±6. . . . . . . . . . . . . . . . . . . . . . .
Uphill Control 7A1±6. . . . . . . . . . . . . . . . . . . . . . . . .
Shift Mode Control 7A1±7. . . . . . . . . . . . . . . . . . . . .
Gear Shift Control 7A1±8. . . . . . . . . . . . . . . . . . . . .
Winter Drive Mode 7A1±9. . . . . . . . . . . . . . . . . . . . .
Backup Mode 7A1±9. . . . . . . . . . . . . . . . . . . . . . . . .
Functions of Input / Output Components 7A1±10. .
Diagnosis 7A1±11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electronic Diagnosis 7A1±11. . . . . . . . . . . . . . . . . . .
Check Trans Indicator 7A1±11. . . . . . . . . . . . . . . . . .
Diagnostic Check 7A1±11. . . . . . . . . . . . . . . . . . . . . .
ªCheck Transº Check 7A1±12. . . . . . . . . . . . . . . . . .
Tech 2 OBD II Connection 7A1±13. . . . . . . . . . . . . .
Transmission Data 7A1±18. . . . . . . . . . . . . . . . . . . . .
OBD II Diagnostic Management System 7A1±19. .
16 ± Terminal Data Link Connector (DLC) 7A1±20.
Malfunction Indicator Lamp (MIL) 7A1±21. . . . . . . .
DTC Types 7A1±21. . . . . . . . . . . . . . . . . . . . . . . . . . .
Clear DTC 7A1±22. . . . . . . . . . . . . . . . . . . . . . . . . . . .
DTC Check 7A1±22. . . . . . . . . . . . . . . . . . . . . . . . . . .
PCM Precaution 7A1±22. . . . . . . . . . . . . . . . . . . . . . .
Information On PCM 7A1±22. . . . . . . . . . . . . . . . . . .
Intermittent Conditions 7A1±23. . . . . . . . . . . . . . . . .
Transmission And PCM Identification 7A1±23. . . . .
Diagnostic Trouble Code (DTC)
Identification 7A1±24. . . . . . . . . . . . . . . . . . . . . . . . .
DTC P0218 Transmission Fluid Over
Temperature 7A1±25. . . . . . . . . . . . . . . . . . . . . . . . . . . DTC P0705 Transmission Range Switch
(Mode Switch) Illegal Position 7A1±27. . . . . . . . . . . .
DTC P0706 Transmission Range Switch
(Mode Switch) Performance 7A1±30. . . . . . . . . . . . . .
DTC P0711 Transmission Fluid Temperature
(TFT) Sensor Performance 7A1±33. . . . . . . . . . . . . .
DTC P0712 Transmission Fluid Temperature
(TFT) Sensor Circuit Low Input 7A1±36. . . . . . . . . . .
DTC P0713 Transmission Fluid Temperature
(TFT) Sensor Circuit High Input 7A1±39. . . . . . . . . . .
DTC P0719 Brake Switch Circuit Low
(Stuck On) 7A1±42. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DTC P0722 Automatic Transmission Output
Speed Sensor (OSS) Low Input 7A1±45. . . . . . . . . .
DTC P0723 Automatic Transmission Output
Speed Sensor (OSS) Intermittent 7A1±48. . . . . . . . .
DTC P0724 Brake Switch Circuit High
(Stuck Off) 7A1±51. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DTC P0730 Gear Error Without Input Speed 7A1±53
DTC P0742 Torque Converter Clutch (TCC)
System Stuck On 7A1±56. . . . . . . . . . . . . . . . . . . . . . .
DTC P0748 Pressure Control Solenoid (PCS)
(Force Motor) Circuit Electrical 7A1±58. . . . . . . . . . .
DTC P0751 Shift Solenoid A Performance
(Stuck Off) 7A1±60. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DTC P0752 Shift Solenoid A Performance
(Stuck On) 7A1±62. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DTC P0753 Shift Solenoid A Electrical 7A1±64. . . . .
DTC P0756 Shift Solenoid B Performance
(Stuck Off) 7A1±67. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DTC P0757 Shift Solenoid B Performance
(Stuck On) 7A1±69. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DTC P0758 Shift Solenoid B Electrical 7A1±71. . . . .
DTC P1850 Brake Band Apply Solenoid
Malfunction 7A1±75. . . . . . . . . . . . . . . . . . . . . . . . . . . .
DTC P1860 TCC PWM Solenoid Electrical 7A1±79.
DTC P1870 Transmission Component Slipping
(TCC Stuck Off) 7A1±82. . . . . . . . . . . . . . . . . . . . . . . .
Circuit Diagram 7A1±84. . . . . . . . . . . . . . . . . . . . . . . . .
Parts Location 7A1±86. . . . . . . . . . . . . . . . . . . . . . . . . .
Harness Connector Faces 7A1±87. . . . . . . . . . . . . . . .
Transmission Fluid Temperature (TFT) Sensor
Specifications 7A1±89. . . . . . . . . . . . . . . . . . . . . . . . . .

7A1±2
TRANSMISSION CONTROL SYSTEM (4L30±E)
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
fastener joint interfaces. Generally, such coatings
adversely affect the fastener torque and the joint
clamping force, and may damage the fastener. When
you install fasteners, use the correct tightening
sequence and specifications. Following these
instructions can help you avoid damage to parts and
systems.
General Description
The 4L30±E is a 4±speed fully automatic transmission. It
uses a microcomputer as a control unit to judge running
conditions including throttle opening rate and vehicle
speed, then it sets the shifting point in the optimum timing
so that best driving performance can be achieved.
In addition, the built±in shift mode select function can
select three shift modes according to the driver's
preference:

Normal mode ±Normal shift pattern.

Winter mode ±Starts in 3rd gear to reduce slippage on
ice or snow.

Power mode has a delayed upshift when more
powerful acceleration is required.
Also, the built±in fail safe function (ªbackup modeº)
assures driving performance even if the vehicle speed
sensor, throttle signal or any solenoid fails.
Further, the self±diagnostic function conducts diagnosis
in a short time when the control system fails, thus
improving serviceability.
The major features of 4L30±E are as follows:

A compact structure consisting of 2 sets of planetary
gears and flat torque converter.

Electronic control selects the optimum shift mode
according to the driving conditions.

Electronic control maintains the optimum hydraulic
pressure for clutch, band brake as well as
transmission so that shift feeling is improved.

Two sets of planetary gears reduce friction of power
train.
Also, a lockup mechanism in the torque converter
reduces fuel consumption.

Wide gear ratio and high torque rate of torque
converter provide excellent starting performance.