Isuzu Amigo / Axiom / Trooper / Rodeo / VehiCross. Service manual — part 920
7A–106
AUTOMATIC TRANSMISSION (4L30–E)
Special Tools
ILLUSTRATION
PART NO.
PART NAME
J–22912–01
Bearing
remover/installer
J–39209
Punch; end nut
J–39208
Rear oil seal installer
J–8614–11
Flange holder
TRANSMISSION CONTROL SYSTEM (4L30–E)
7A1–1
TROOPER
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
. . . . . . . . . . . . . . . . . . .
ABS 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
. . . . . . . . . . . . . . . . . . . . . .
“Check Trans” 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
. . . . . . . .
Types Of Diagnostic Trouble Codes
(DTCs)
7A1–21
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Clear DTC
7A1–21
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
DTC Check
7A1–22
. . . . . . . . . . . . . . . . . . . . . . . . . . .
PCM Precaution
7A1–22
. . . . . . . . . . . . . . . . . . . . . . .
Information On PCM
7A1–22
. . . . . . . . . . . . . . . . . . .
Intermittent Conditions
7A1–22
. . . . . . . . . . . . . . . . .
Transmission And PCM Identification
7A1–23
. . . . .
Isuzu Trooper
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
. . . . . . . . . . . . . . . . . . . . . . .
Connector List
7A1–84
. . . . . . . . . . . . . . . . . . . . . . . . . .
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:
D
Normal mode –Normal shift pattern.
D
Winter mode –Starts in 3rd gear to reduce slippage on
ice or snow.
D
Power mode has a delayed upshift for when more
powerful acceleration is required.
Also, the built–in fail safe function (“backup mode”)
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:
D
A compact structure consisting of 2 sets of planetary
gears and flat torque converter.
D
Electronic control selects the optimum shift mode
according to the driving conditions.
D
Electronic control maintains the optimum hydraulic
pressure for clutch, band brake as well as
transmission so that shift feeling is improved.
D
Two sets of planetary gears reduce friction of power
train.
Also, a lockup mechanism in the torque converter
reduces fuel consumption.
D
Wide gear ratio and high torque rate of torque
converter provide excellent starting performance.
TRANSMISSION CONTROL SYSTEM (4L30–E)
7A1–3
Electronic Control Diagram
C07RY00034
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