ISUZU TROOPER 1995 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

AUTOMATIC TRANSMISSION (4L30-E) 7A-13
NORMAL OPERATION OF 1994-95 4L30-E TRANSMISSION
1. TORQUE CONVERTER CLUTCH (TCC)
APPLICATION CONDITIONS:
Engine coolant temperature must be above 70°C
(158°F).
Moreover, TCC is ON in 2nd gear during kick down
operation when engine coolant temperature is
above
70°C (158°F).
Also,
TCC is always ON in 2nd, 3rd & 4th gear when
transmission oil temperature is above 140°C
(284°F).
2. ATF WARNING LAMP
The ATF warning lamp will be constantly on (not
flashing) if the transmission oil temperature is
above
145°C (293°F).
The ATF warning lamp goes off again when the
transmission
oil temperature is below 125°C
(257°F).
3. SPECIAL SHIFT PATTERN WHEN THE
ENGINE IS COLD:
A special shift pattern is activated when the engine
coolant temperature is below 70°C (158°F). (3-4
shifts
for example are delayed for small throttle
openings and will occur a few MPH higher)
4. SHIFT ALTERATION WITH TECH1
DIAGNOSTIC TOOL CONNECTED:
Shifts will be harsh when TECH1 is connected to
TCM: Connection of TECH1 automatically forces
maximum line pressure during shifts only.

7A-14 AUTOMATIC TRANSMISSION (4l30-E)
MEMO
..

AUTOMATIC TRANSMISSION (4L30-E) 7A-15
DIAGNOSIS
. .,._., INTRODUCTION
The systematic trouble shooting information covered by this Section offers a practical and systematic
approach
to diagnosing 4L30-E transmission, using information that can be obtained from road tests,
electrical diagnosis, oil pressure checks or noise evaluation.
The key to correcting a complaint is to make use of all of the available symptoms and logically letting them
direct you
to the cause.
When
dealing with automatic transmission complaints, it is best to gather as many symptoms as possible
before making the decision to remove the transmission from the vehicle.
Frequently,
the correction of the cause of the complaint does not require removal of the transmission from
the vehicle.

7A-16 AUTOMATIC TRANSMISSION (4L30-E)
DRIVER INFORMATION
To analyze the problem fill a complete description of the owner's complaint.
Please draw a circle around the right information and complete the following form. (Find next page an
example of form completed). You can draw a circle around many numbers if you are not sure.
A-Today' a date : Month: ............... Day:·············· Year: ...............
B-Ead User Name, Address :
C-Dat~ of Problem : Month: ..................... Day: ................. Year: ................
D-Mileaae: E-With Ignirioa. ON ia OIECK F -Car load wheo proHem oceand :
...............
Miles/Km TRANS lodicator : 1 - Towing a trailer 2-.......... people OR ......... Kg
1-Flashing 2-Not Flashing
G-Weather coa.ditiou whea. H-Weather Temperature whea I -Road Cooditioaa wheu problem J-Frequeucy ofthe Problem :
!Problem: problem: : 1-Always 2-Occuional :
1-Clear 2-Cloudy 1-Hot 2-Warm 1-Any 2-Inter City ........ times/day,
3-
Rain 4-Snow 3-Cool 4-Cold 3-Outsid~ City 4- Highway douooo times/month
5- Unstable
6-Any 5-Unstable 6- Any S-Uphill 6-Downhill 3-
Only Once 4-Otheu:
7-Unpaved 8-Snow
9-Others:
IK-EJI&iae Coaditioa : L-Eagiae Spttd whca the problem M-Traasmissiou Coa.diriou wbea
1-Always 2- At Cold occand: it occund:
3-During Warming up 1-Idling 2-Starting 1-Any 2-
Idling
4-After Warming or Hot 3-Stalling 4-HighRPM 3-Starting 4-Driving
5-Others 5-LowRPM 5-Accelerating 6-Coasting
7-Inc:omer 8-Shifting
N-If then b a Trauamiuioa drivcabillty problem BEFORE TIIE CHECK TRANS
INDICATOR WAS FI..ASHING :
I-No Power in Range: All-P-R-N-D-3 -1-L during
a : upshift : 1-2 I 2-3 I 3~4 or downshift : 4-3 I 3-2 I 2-1
2-No shift in Range :All-P-R-N-D-3-2-L during a: upshift
: 1-2 I 2-3 I 3-4 or downshit : 4-3 I 3-2 I 2-1
3- Shift Shock in Range: All-P-R-N-D -3-2-L during a
:upshift : 1-2 I 2-3 I 3-4 or downshift : 4-3 I 3-2 I 2-1
4-Shift Slip in Range: Ali-P-R-N -D-3 -2 -L during a: upshift : 1-2 I 2-3 I 3-4 or downshift : 4-3 I 3-2 I 2-1
5-Shift Delayed in Range : All -P -R-N - D - 3 - 2 - L during a: upshift :
1-2 I 2-3 I 3-4 or downshift : 4-3 I 3-2 I 2-1
6-Shi1 Point too high in Range :All -P-R-N-D-3-2. L during a: upshift:
1-2 I 2-3 I 3-4 or downshift: 4-3 I 3-2 I 2-1
7-Shift Point too low
in Range : All -P -R-N-D-3 -2-L during
a : upshift : 1-2 I 2-3 I 3-4 or downshift : 4-3 I 3-2 I 2-1
S-TCC Shudder in Range :All-P-R. N-D-3-2-L during a: upshift
: 1-2 I 2-3 I 3-4 or downshift : 4-3 I 3-2 I 2-1
9-Noise in Range : All -P -R-N - D - 3 - 2 - L during a: upshift : 1-2 I 2-3 I 3-4 or downshift : 4-3 I 3-2 I 2-1
INolae type: 1-Buzz 2-Whine 3-Clunk 4-Rattle S-Whistle II 6-light 7-medium 8-hoavy
10-Other: ..................... in Range : All -P -R-N - D - 3 - 2 - L during a: upshit :
1-2 I 2-3 I 3-4 or downshift : 4-3 I 3-2 I 2-1
0-Other cDitomer co aura. aad commeats
P •
bUZD Vebiele Code : ooo,0ooooooooooou• .. ouooooooooooooo•••••o•U Q-VIN Number ··················\
··················\
··········
R-Date orVebiclc Regjatratiou Month: ..................... Day: .............. Year: ...............
S • Traua. model: .................... -. ......................... T-Aff Serial Number : uo••••••••••••••••••\
•••oo•oooooooooooooouooo
U-Your aame: ··················\
··················\
··········
y. Dealer Naau, Addn .. , Pbou~
•

AUTOMATIC TRANSMISSION (4L30-E) 7A-17
Example of form completed.
A-Today's date : Month : April .............. Day: .13 ............. YOM: .1994 ..............
B-Ead U.er Name, Address : Dave Smith
6584, Arlington road
P1ymoutll Ml 48170
USA
C-Date or Problem :
Month : April... ................ Day:.8 ................ You : .1994 ...............
D-Mileace: E-With lguirioa ON is CHECK F -Car load whcu problem occartd:
12230 .. J.@1Km @! TRANS ludicator: 1 -Towing a trailer 2-.. 2 ....... people OR ......... Kg ashing 2-
Not Flashing
G-Weatbtr couditious wbeu H-Weather Temperature wheu I-Road Conditions ""hen problem J-Frequency or the Problem : problem: problem: : 1-Always ~sionaJ :
1-Clear 2- Cloudy 1-Hot 2-Wann 1-Any l.-lltto:r City ........ fio•~s/ y,
3-
Rain 4-Snow 3-Cool ~d 3-Owside City (j}Highway .. .3 ... tim~stmonth 5-Unstable (!).ny S-Unstable 6- y 5-Uphill ti-Downhill 3-Only Once 4-Otb.n: 7-Unpaved )8t.now 9-Others .......___
l!Jis 111P.
K -Euciue Coa.dition : L-Engiue Speed wbea the problem M-Traasmiuioo Condition wheu ~e IJJis 7~~· do l1ot
!-Always 2-At Cold occared: it occared: lJto a
~ing Warming up 1-Idling 2-Starting 1-Any 2-Idling C'collnt
er Warming
or Hot 3-Stalling (3Higt~RPM 3-Starting 4-Driving
5-Others S-Low RPM (~cceleratin~~~~g 7-lr. comer 8-JUftmg
IN-Irtbcrt is a Transmission drive ability problem BEFORE THE CHECK TRANS INVJCATOR WAS FLASHING :
1-NoPower in Range : All -P -R-N-D-3 - 2 - L during a: upshift: 1-2 I 2-3 J 3-4 or downshift: 4-3 I 3-2 / 2-1
~hift inR.ange:AII-P-R-~-0-3-2-L during a : up~hifl : 1-2 I 2-3 ! 3-4 01 uowushifl : ~-3 I 3-2 I 2-1 Shock in Range: AII-P-R-N -~ -2-L during·~-: I 2-3 I (Do~:Qi 3-2 I 2-l 4-Shift Slip in Range : All -P -R-N - D - 3 - 2 - L during a: ups "ft : 1-2 I 2-3 / 3-4 or dov.nshift : 4-3 / 3-2 I 2-1
S-Shift Delayed
in Range,.: All -P -R-N -D-3 -2 - L during
a :upshift : 1-2 I 2-3 I 3-4 or dovmshift : 4-3 I 3-2 I 2-1
6-Shift Point too higJl in Range :All -P-R-N • D-3-2-J.. during a : upshift : 1-2 I 2-3 ! 3-4 or downshift : 4-3 I 3-2 I 2-1 7-Shift Point too low
in Range :All -P-R-N-D-3-2; L during a :upshift : 1-2 I 2-3 I 3-4 or downshift : 4-3 I 3-2 I 2-1
8-TCC Shudder
in Range : All -P - R
- N - D - 3 -2 - L during
a :upshift : 1-2 I 2-3 I 3-4 or downshift : 4-3 I 3-2 I 2-1
9-Noise in Range : All -P -R-N -D-3 -2-L during a :upshift : 1-2 I 2-3 I 3-4 or downshift : 4-3 I 3-2 I 2-1
~oise type: 1-Buzz 2-Whine 3-Clunk 4-lWtle S-Whistle II 6-light 7-medium 8-heavy
10-0thor: ..................... inR.ange:AII-P-R-N-0-3-2-L during
a :upshift : 1-2 I 2-3 I 3-4 or downshift : 4-3 I 3-2 I 2-1
0-Other customer co accra aa.d com meat• :
(This is just an e~ample ). Shift shock very harsh
overall during a downshift. Not sure if
it's the 4-3 or 3-2.
P-huza Vehicle Code : 94 UCR Q -VIN Number 4S2CV58ZXM432404 7
R-Date ofVehieJe Re~stratioa Month : .November. Day: ... .18 ........ Year: . .1993 .........
S -Traaa.. mtldel : 4L30-E T-Aff Serial Number : 96 358 654
U-Yoali'D.ame: Joe Spring
V-Dealer Name, Address, Phooe
Kent Helfrich
Home-town ISUZU
900 -999 -9999

7A-18 AUTOMATIC TRANSMISSION (4L30-E)
GENERAL DIAGNOSIS PROCEDURE
I Complaint
1 Follow PRELIMINARY
INSPECTION CHART
Remove transmission
assembly and
repair/replace
as
required
transmission assembly
NO
NO
Perform repair
per
SYMPTOMS CHART
Can fault
TEST DRIVING
YES
YES
•