Isuzu D-Max / Isuzu Rodeo (TFR/TFS). Manual — part 626
7A1–4 AUTOMATIC TRANSMISSION (4L30-E)
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 perform-
ance can be achieved.
In addition, the built-in shift mode select function
can select two shift modes according to the driver’s
preference.
•
Normal mode –Normal shift pattern.
•
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:
•
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 lock-up mechanism in the torque
converter reduces fuel consumption.
•
Wide gear ratio and high torque rate of torque
converter provide excellent starting perform-
ance.
AUTOMATIC TRANSMISSION (4L30-E) 7A1–5
CONSTRUCTION
8
9
5
6
7
11
10
2
3
4
1
1.
TORQUE CONVERTER-CLUTCH (TCC)
2.
FOURTH CLUTCH (C4)
3.
OVERRUN CLUTCH (OC)
4.
OVERDRIVE UNIT
5.
REVERSE CLUTCH (RC)
6.
SECOND CLUTCH (C2)
7.
THIRD CLUTCH (C3)
8.
RAVIGNEAUX PLANETARY GEARSET
9.
BRAKE BAND (B)
10.
OVERDRIVE FREE WHEEL
(ONE WAY CLUTCH) (OFW)
11.
SPRAG FREE WHEEL
(ONE WAY CLUTCH)
(PFW)
CROSS SECTION
A07LW004
7A1–6 AUTOMATIC TRANSMISSION (4L30-E)
ELECTRONIC CONTROL DIAGRAM
DRIVER'S INPUT
MANUAL SELECTOR
KICKDOWN SWITCH
BRAKE SWITCH
PUSH BUTTON FOR
NORMAL/POWER
DRIVE MODE
VEHICLE SPEED
SENSOR
ATF TEMPERATURE
SENSOR
MODE SWITCH
PRND32L
5 SOLENOID
VALVES
BATTERY
+12
IGNITION
TRANSMISSION
CONTROL
MODULE
(TCM)
COMPENSATION FOR ENGINE LOAD
AIR CONDITIONING SWITCH
ON-BOARD DIAGNOSTIC
ENGINE CONTROL
MODULE(ECM)
THROTTLE POSITION
SENSOR
CRANK ANGLE SENSOR
ENGINE COOLANT
TEMPERATURE SENSOR
DASH BOARD DISPLAY
POWER DRIVE MODE
LAMP
SHIFT INDICATOR LAMP
A/T SHIFT INDICATOR
CONTROL UNIT
(
(
CHECK TRANS LAMP
C07LW003
AUTOMATIC TRANSMISSION (4L30-E) 7A1–7
TRANSMISSION CONTROL MODULE (TCM)
C07LW002
ENGINE
VEHICLE
A7
TPS
4L30-E
Ac
Ad
Aa
Mc
Md
Ma
Mb
Ab
Ac
X2
X1
Xa
Xb
Xc
Xg
IGN
A8 A4 C1 D1
IGN
IGN
IGN
BATT
GND
D14
C5
C6
D7
D6
D5
D4
B3
C14
A12
B12
B11
C7
C12
A2
A3
A9
C15
C16
TCM
D9
D8
B8
B5
C10
B9
OUT
MODE SW A
MODE SW B
MODE SW C
MODE SW G
OIL TEMP
OUTPUT SPEED HI
OUTPUT SPEED LO
TCC HI
SHIFT SOL. HI
SHIFT SOL. A
SHIFT SOL. B
BAND APPLY SOL.
FORCE MOTOR HI
FORCE MOTOR LO
BRAKE SW
A/C REQUEST
POWER SW
KICKDOWN SW
CHECK TRANS LAMP
POWER LAMP
+
–
ECM:
TPS:
TCC:
Engine Control Module
Throttle Position Sensor
Torque Converter Clutch
D16
DIAG SW
CRANK
ANGLE
SENSOR
ECM
D12
ENGINE
SPEED
SERIAL DATA
TORQUE
MANAGEMENT
ENGINE
COOLANT
TEMP SW
C8
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