1995 ISUZU TROOPER Workshop Manual

AUTOMATIC TRANSMISSION (4L30·E) 7A-9
GEAR SHIFT CONTROL
CD Shift pattern
SELECT
LEVER RANGE SHIFT PATTERN
D (Drive)
1
~ 2TCC ~ 3TCC ~ 4TCC
3 (Third)
1 ~ 2TCC ~ 3TCC f-4TCC
2 (Second)
1 ~ 2TCC f-3TCC
L (First) 1f-2
TCC =Torque Converter Clutch
® Gear position
The gear is selected by ON/OFF of two solenoids.
G~ 1-2/3-4
4 (Fourth)
X
3 (Third)
0
2 (Second) 0
1 (First)
X
P (Park)
R (Reverse)
X
N
(Neutral)
@ Selecting
gear position
2-3
X
X
0
0
0
0=0N
X=OFF
1-2/3-4 SOLENOID
(Normally closed)
2-3 SOLENOID
(Normally open)
ON ~ PRESSURE TO
SHIFT
VALVE
OFF~ PRESSURE TO
SHIFT VALVE
Seven types
of positions can be selected according to 5 signals from the mode switch as shown below.
MODE
SW TERMINALS
SELECT LEVER RANGE 5(D)
8(A) 7(8) 6(C) 3(G)
P (Park)
• • •
R (Reverse) • • •
N (Neutral) • • •
D (Drive) • • •
3 (Third) • • • • •
2 (Second) • • •
L (First) • • •
• =Continuity
Fig. 7A-5a

7A-10 AUTOMATIC TRANSMISSION (4L30-E)
WINTER DRIVE MODE
(1) Operation
The winter switch will operate when switched on after the all of following conditions are present.
Conditions:
a) The gear select position is "D" range only
b) Vehicle speed is 7mph (11 km/h) or less
c) Transmission oil temperature is 120°C (248°F) or less
d) Kick-down switch is off
e) Accelerator opening is at 8% or less.
(2) Cancel release
CD Cancellation by driver
a) Turning off the winter drive mode switch
b) Shifting select position to "3", "2", or "L"
(Winter drive mode is not canceled by selecting "D", "N", "R", or "P")
c) Ignition key is turned off
® Automatic cancellation
a) When vehicle runs at 21mph (34 km/h) or more for 1 second or more
b) When transmission oil temperature reaches 140°C (284°F) or above
Note: The mode returns
to normal drive mode automatically 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 TCM.
The "CHECK TRANS" light flashes to alert the driver, and the transmission must be manually shifted
as follows:
Select lever
position
D
Manual3
Manual2
Manual L
R
Gear Ratio Selected
4 (Fourth)
4 (Fourth)
3 (Third)
1 (First)
Reverse
Shifts are firmer to prevent clutch slip and consequent wear. The fault should be corrected as soon as
possible.

AUTOMATIC TRANSMISSION (4L30-E) 7 A-11
FUNCTIONS OF INPUT /OUTPUT COMPONENTS
Components Function
Speed sensor
Senses rotation
of output shaft and feeds the data to Transmission
(fixed
to transmission (T/M)) Control Module (TCM)
Throttle Senses the extent of throttle valve opening and the speed of the throttle
position sensor (TPS) valve lever motion to open the valve and feeds the data to TCM (fed to
(fixed to engine)
Engine Control Module (ECM) also)
I
Brake Switch (SW) Senses whether the driver has pressed the brake pedal or not and feeds
N (fixed
to brake pedal) the
information to TCM
p Kick-down SW (fixed to Senses whether the driver has pushed the accelerator pedal fully or not
u accelerator pedal) and feeds the information to TCM
T Mode
SW (fixed to T/M) Senses the select lever position and feeds the information to TCM
s Power drive SW Senses whether the driver has selected the power mode and feeds the
I (fixed to front console) information to TCM
G T/M
oil temp. sensor
Senses the T/M oil temperature and feeds the data to TCM
N Engine
coolant Senses the engine cooling water temperature and feeds the data to TCM
A temperature
SW (feeds the signal from ECM)
L
Engine speed
signal Feeds the signals monitoring engine speed to TCM from Ignition Control
Module
(fed to ECM also)
Air conditioning Senses whether the air conditioner has been switched on or not and
information feeds the information
to TCM
On-board diagnostic
input By monitoring the Ground (GND), the location of failure is shown on the
T/M
monitor lamp ("CHECK TRANS") by flashing the diagnostic trouble
code
Winter switch
Senses whether the driver has selected the winter mode, and feeds the
(fixed
to front console) information to TCM
Cruise
controller Downshift takes place when Overdrive OFF signal is received from auto
(Overdrive
OFF signal) cruise control unit
Shift
solenoid Selects shift point and gear position suited to the vehicle running con-s 1-2/3-4, 2-3
dition on the basis of TCM output 0 Band apply solenoid
Controls oil flow suited to the vehicle running condition on the basis of L
E TCM output
0 N
Torque
Converter Controls clutch engagement/disengagement suited to the vehicle
u 0 Clutch solenoid running condition on the basis of TCM output
T I Force motor Adjusts the oil pump delivery pressure to line pressure suited to the p D
(Pressure regulator vehicle running condition on the basis of TCM output u valve) T
Power drive mode lamp
Informs the driver whether the vehicle is in power mode or not
s Winter drive mode lamp Informs the driver whether the vehicle is in winter mode or not
I T/M monitor lamp Informs the driver of failure in the system. It also displays the self diagnosis
G
("CHECK TRANS") code.
N Data Link Connector
(DLC) When connected with TECH 1 or tester, can communicate the data for A
L function
check, etc. (fed to ECM also). When TECH 1 is not connected, can
communicate the
signal for torque management with ECM.
Self-diagnosis connector
When short-circuited with the bipolar connector, the T/M monitor lamp
displays
a failure by code.
ATF warning
lamp Lights when ATF oil temperature rises.
ABS signal When the select lever is at "Reverse" or "L" range, sends a signal to the
ABS controller as one of the ABS control conditions.

7A-12 AUTOMATIC TRANSMISSION (4L30-E)
RANGE REFERENCE CHART
1-2/3-4 2-3 0/DRIVE OVERRUN FOURTH THIRD REVERSE SECOND BAND ROLLER ENGINE RANGE
GEAR SOL
SOL
CLUTCH CLUTCH
CLUTCH CLUTCH CLUTCH CLUTCH MBLY BRAKING N_c. N.O.
(OFW) (OCl
(C4)
(C3) (RC)
(C2) (B)
P-N OFF
ON APPLIED NO
R REVERSE OFF
ON LD APPLIED APPLIED LD NO
1ST OFF
ON LD APPLIED LD APPLIED NO
2ND ON ON LD APPLIED APPLIED FW APPLIED YES D 3RD ON
OFF LD APPLIED APPLIED APPLIED NE YES
4TH OFF OFF FW APPLIED APPLIED APPLIED NE YES
1ST OFF ON
LD APPLIED LD APPLIED NO
3 2ND ON ON LD APPLIED APPLIED FW APPLIED
YES
3RD ON OFF LD APPLIED APPLIED APPLIED NE YES
1ST OFF
ON LD APPLIED APPLIED LD APPLIED YES 2 2ND ON
ON LD APPLIED APPLIED FW APPLIED YES
L 1ST OFF
ON LD APPLIED APPLIED LD APPLIED
YES
LD : LOCKED IN DRIVE FW: FREEWHEELING NE : NOT EFFECTIVE
TORQUE CONVERTER CLUTCH
B
C4lil RC 1/f ~
C2 I I
C3
PFW ~
Qe OFW
Qe: ENGINE
TORQUE Qt: TURBINE TORQUE Qo: OUTPUT SHAFT TORQUE