engine oil ISUZU TROOPER 1995 Workshop Manual

7A-102 AUTOMATIC TRANSMISSION (4L30-E)
DIAGNOSTIC TROUBLE CODE
(DTC) 34
BAND APPLY SOLENOID SHORT TO GROUND OR OPEN
This DTC flashes the CHECK TRANS indicator and
sets the BACKUP
MODE.
Circuit Description:
• The band apply solenoid is a normally open
solenoid
which controls the flow of fluid for brake
band
application. The Transmission Control
Module (TCM) uses Pulse Width Modulation
(PWM) and changes the duty cycle to control the
solenoid. The
TCM turns the solenoid ON
(energized) and OFF (de-energized) at a constant
frequency. The length
of time the solenoid is
energized
during each ON/OFF cycle is called the
pulse
width. By varying or "modulating" the
pulse
width, the solenoid output pressure is
changed.
Since the solenoid is normally closed,
increasing the pulse width increases the duty
cycle and decreases the output pressure. PWM
control provides smooth band application
without an accumulator. The band is only
applied in first and second gears.
• In the event of an electrical failure (open), the
solenoid regulates at the
maximum oil flow (0%
duty cycle).
• The solenoid is activated by a current. This
current is produced
by applying a voltage to one
side (the High side) and a
ground to the other
side (low side).
• The High Side Driver (HSD) is a circuit of the TCM
that acts as a switch between the solenoids and
the
supply voltage. The High side of the solenoid
is
permanently supplied with voltage, except in
BACKUP
MODE or when Ignition is OFF the HSD
2{8)\l, M-7
r----C-90 BRN/YEL H-10 ( 12
is turned OFF.
• The TCM continually monitors the splenoid
connection
to its low Side Driver (LSD) for either
low or high voltage. The LSD is a circuit of the
TCM that acts as a switch between the solenoid
and
ground. When the solenoid is commanded
ON the TCM is switching the solenoid to ground.
• There are two tests of the LSD: when the engine
is cranked (DTC82) and
when the ignition is
turned ON (DTC34).
• When the ignition is turned ON, and before the
engine is cranked, the TCM activates the shift
solenoids (1-2/3-4, 2-3 and Band) to check for
short circuits or open circuits. To do so the gear
is set
to 4th, 3rd, 1st, 1st with band apply, 4th
with no HSD. Each one of the 5 tests requires
0.15 second. If the engine is cranked before the
end
of all tests, the remaining tests are not done.
Diagnostic Aids:
• This diagnostic is an electrical test done by the
TCM.
• Detection conditions:
CD The solenoid low side connected to TCM
terminal A9 is shorted to ground or open.
@ The test is only done when ignition is ON.
@ Engine Speed <480 RPM (not cranked) and
Output Speed= 0 RPM.
® The condition needs to be present for 0.15 to
0.75 second after ignition switch ON.
•
Action after the detection time: BACKUP MODE.
•
Recovery conditions: To recover, do an IGNITION
CYCLE.
: --r ----r ----
1-
- -: ~Z[;'~,~~ION
I 1'•1 ~~ If ~!FT . i '· !: J GROUND A9
I
I
I
1 ·. SOI:!Noto· R sOLI!lQI,~, . ~ , ~. sOt.ENOiti•J
I ,Ji'Ji ·
· I
I •• ) . I
--~~---------~---~ >--------< I
I
I I
BAND APPLY C-91 BRNtWHT H-10
I SOLENOID ( CONTROL : C12 10
I .
: GROUND {
. BLK/ORN . ; C1 BLK/BLU :> 01 ..... ---J
H-11
TRANSMISSION
CONTROL
MODULE (TCM)
•

7A-116 AUTOMATIC TRANSMISSION (4L30-E)
DIAGNOSTIC TROUBLE CODE (DTC) 44
BAND APPLY SOLENOID SHORT TO PLUS
This DTC flashes the CHECK TRANS indicator and
sets the BACKUP
MODE.
Circuit Description:
• The band apply solenoid is a normally open
solenoid which controls the flow of fluid for brake
band
application. The Transmission Control
Module (TCM) uses Pulse Width Modulation
(PWM) and changes the duty cycle to control the
solenoid. The TCM turns the solenoid ON
(energized) and OFF (de-energized) at a constant
frequency. The
length of time the solenoid is
energized
during each ON/OFF cycle is called the
pulse width. By varying or "modulating" the
pulse width, the solenoid output pressure is
changed.
Since the solenoid is normally closed,
increasing the pulse width increases the duty
cycle and decreases the output pressure. PWM
control provides smooth band application
without an accumulator. The band is only applied
in first and second gears.
• In the event of an electrical failure (open), the
solenoid regulates at the maximum oil flow (0%
duty cycle).
•
The solenoid is activated by a current. This
current is produced by
applying a voltage to one
side (the High side) and a
ground to the other
side (low side).
• The High Side Driver (HSD) is a circuit of the TCM
that acts as a switch between the solenoids and
the
supply voltage. The High side of the solenoid
is permanently supplied with voltage, except in
BACKUP
MODE or when ignition is OFF the HSD
H-7
is turned OFF.
• The TCM continually monitors the solenoid
connection to its Low Side Driver (LSD) for either
low or high voltage. The LSD is a circuit of the
TCM
that acts as a switch between the solenoid
and ground. When the solenoid is commanded
ON the TCM is switching the solenoid to ground.
• There are two tests of the LSD: when the engine
is cranked (DTC82) and
when the ignition is
turned
ON (DTC44).
• When the ignition is turned ON, and before the
engine is cranked, the TCM activates the
shift
solenoids (1-2/3-4, 2-3 and Band) to check for
short circuits or open circuits. To do so the gear
is set
to 4th, 3rd, 1st, 1st with band apply, 4th
with no HSD. Each one of the 5 tests requires
0.15 second. If the engine is cranked before the
end
of all tests, the remaining tests are not done.
Diagnostic Aids:
• This diagnostic is an electrical test done by the
TCM.
• Detection conditions:
CD The solenoid Low side connected to TCM
termin.al A9 is shorted to voltage.
@ The test is only done when ignition is ON.
@ Engine Speed < 480 RPM (not cranked) and
Output
Speed = 0 RPM.
@ The condition needs to be present for 0.15 to
1.18 second after ignition switch ON.
•
Action after the detection time: BACKUP MODE.
•
Recovery conditions: To recover, do an IGNITION
CYCLE.
,... BATTERY-, C-90
I INPUT I? A4 GRN/WHT ·~-----BATTERY
( 4
I IGNITION I ? I INPUT A7 II
I { I? AS I GROUND I ? A3
I
)
I A2
I I
I
I
I I
I I
I
I
I I
I SHIFT& I
I BANDAPPLY C-91 SOLENOID I 1 _:oNTROL _ 1
TRANSMISSION
CONTROL MODULE (TCMI
C12
RED/GRN
BRN/YEL
BRN/BLK
BRN/RED
BRN/WHT
H-42 •--::------ECM MAIN RELAY )) 8 H-10
«--------3-(D--,I'l----- --'~L -,,,l M-7
( 12
2:j
16 r-- -r ----r ----
1-- --
AUTOMATIC I
I TRANSMISSION
: H::Q]:;& : I OLE SOlENOID I
I I
I I
1-213-4 2-:
-II
SHIFT
II
s SOLE NOlO s
-"--------_______ .J
H-10 ( 10
•

7A-120 AUTOMATIC TRANSMISSION (4L30-E)
DIAGNOSTIC
TROUBLE CODE (DTC) 51
ENGINE COOLANT SWITCH SHORT TO GROUND, PLUS OR OPEN
This DTC does NOT flash the CHECK TRANS
indicator and does NOT set the BACKUP MODE.
Circuit Description:
• The Engine Coolant Temperature is measured by
a sensor in the coolant system. This information
is used by the Engine Control Module (ECM) for
the engine. The ECM provides the information:
Engine Warm to the Transmission Control
Module (TCM) when the ECM measures a
temperature
higher than 70°C (158°F).
• The information is provided using a wire
between the ECM terminal A9 and the TCM
terminal D14. When the engine is warm the ECM
connects its terminal A9 to ground using a Low
Side Driver. When the engine is Cold the ECM
lets this wire open and the TCM pulls it up to 5
volts.
•
When Ignition is ON and Engine is OFF: the ECM
always sends the information "engine cold" even
if the engine is warm. The information is valid
only when the engine is ON.
Diagnostic Aids:
• This Diagnostic is not an electrical test done by
the TCM but a test between different information
("logic test").
• Detection conditions of engine always cold:
CD Engine! seen as cold: wire short to voltage or
open.
@ Transmission Oil Temperature >150°C (302°F)
or more than 20 minutes since last ignition
cycle.
@ Detection conditions need to be present for at
least 25 seconds.
• Detection conditions of engine always warm:
CD Engine! seen as warm: wire short to ground.
@ Transmission Oil Temperature< ooc (32°F).
@ Without problem on Transmission Tem­
perature sensor then:
voltage on AfT Oil
Temperature sensor <4.74 V.
@ Detection conditions need to be present for at
least 6 seconds.
• Action after the detection time: No action.
• Recovery conditions: To recover, Engine Coolant
Temperature change information need to be
present
for more than 6 seconds.
r - - - -C·91 BRN C-1 r - - - -
I ~~~ENT I f,_D_1_4 __ ~.!__--------~-: I ~NGt~~ I
1 teMPERAtuRE I 1
1 t=R'ATJJRel
I INPUT I I I OUTP\:IT l
I 1
1 I I
I I I H-11 I l
I
GROUND 11 ? C1 BLKJORN ~9 I I I I BLKJBLU ( 1 I > o1 I
I I 1 I I
I I I I
~---J ~---J TRANSMISSION ENGINE
CONTROL CONTROL
MODULE
(TCM) MODULE (ECM)
•

AUTOMATIC TRANSMISSION (4L30-E) 7A-141
A/T OIL TEMPERATURE INDICATOR TEST
1. Working normally if it is ON for 2 to 3 seconds
with ignition switch ON (or when the engine is
cranked)
but it is OFF after.
2. Not working normally if it stays ON always
when ignition is ON.
CD This means that connection between the
Lamp and the Transmission
Control
Module (TCM) is shorted to ground.
r~,··mm -,-,~
• , I
I
TRANSMISSION
CONTROL
MODULE (TCM)
@ Verify if Indicator connector 1-1 terminal 2 is
shorted
to ground.
@ Verify if the TCM connector C-90 terminal
A10 is shorted to ground.
@ Verify that the Indicator connector 1-1
terminal 6 is connected to Battery.
@ If problem not solved GOTO TCM MEM­
CAL REPLACEMENT.
@ If problem solved see CHECK TRANS
INDICATOR
(page 7A-46).
AfT OIL TEMPERATURE INDICATOR ~-~--~I
C-90 ORNJBLU H-9 1~1 :·' ,.· . 'I 1-1 >-A-10--=.:..;.;_;:,=-~>>----<( · , . ' >• • _;__I ;:. 16 2 1 . • .i· ,..:., • 6
I ·•'I• ·. . , . . J
BLU!YEL
BLKJORND
BLK/IILU ~~
I II 1
I I
1_:1;_-:....... _]
WARNING BOX
FUSE BOX

A4
D16
D9
C1
D1
D12
A7
AB
TRANSMISSION
A3 C10 C12
B9
A2
All A9 A10
BB C15
B6 C16
CONTROL
B3
B10 C14
C7
B4
D14
MODULE
D7 D6
D5
C5 D4 C6
B5
B12
(TCMI
A12 B11
DB
CB
AUTOMATIC TRANSMISSION (4l30-E) 7 A-151
WIRING DIAGRAM
DIAGNOSIS
CONNECTOR (C-921 C-91
1: : j
B/0 B
I
I B/L
C-91 BIR :
G9 BIR 18
C-90 BRIB )
C-91 ) BR!W
C-90
BRIR I
I BR/Y )
C-91 V/W
'
' VIR )
C-90 G/Y
C-91 GRIL ) '
' BRIL :
C-91 BR
C-91 UR
: B/W
C-90 LIB )
;&"
r-r ,7 ' '
' '
' '
rt' w ,6
' B '
1---+: 5
ENGINE BLOCK •I C-91 R v
BODY•I~
H-11 B/0
'::5 B/L
1
H-5 BIR
(( 5
J
II• ENGINE B LOCK
E-~1 GNITION
ONTROL
MODULE ( 4 c
TACHOMETER
H-10
BRIB 'I 2 I
,J BR!W
I BRIR 16, ' BR/Y (( 12
H-10
4 ~ VC:!:f._
,j VIR
' GIR 3, ' GRIL ,,'~ ' BRIL (( 15
H-7 ((1
---
'r
B/P
1
v
I
MAIN CASE M-71(1 IT-MISSION) /1 A -'m'-SHIFT SOLENOID: 2-3 I I 4(C
: 3(0 -'m'-SHIFT SOLENOID: 1-2 /3-4
:, 21B -'100"'--SOLENOID: BAND AP PLY
ADAPTER
CASE
M-6211 IT-MISSION) FORCE MOTOR I 2 B
~ : liE (PRESSURE REGULAT OR VALVE)
I : 31C rAAUr1 '-== : SID I :, 41A ~I•
uo
UR
B/W
H-5
E 1-5 2 ~9 LIO
'
OIL TEMPERATURES
SOLENOID:
TORQUE
C-1 ..---A9 C-1 A1 C-2 D6 C-2
.-----.£L HI .?
ENSOR
CONVERTER CLUTCH
ENGINE CONTROL
MODULE (ECMI
\,o LIR < 3 OUT THROTTLE P OSITION SENSOR (ENGINE) ; B/W
' 1 LO 11 B-~10 LIB B ( 2 1 ~) II• BODY
"] "" oow' ""''" 1 -
: SPEED SENSOR : (EXTENSION CASE I ' + 2 NOTE:
't]
CONNEC
C12
: C2 ECM
C4 TOR
NO. WIRE /COLOR
~90 BRIR
I 3 I 2 I 1 I DATA LINK CONNECTOR (C-91 / MALE FEMALE TERMINAL TERMINAL
Fig.
7A-11a

•
, cCi" -.J )> I .... N
RELAY
& FUSE BOX
(FL-1, FL-2, FL-3)
THROTTLE BODYASM SPEED SENSOR
ECM:
ENGINE CONTROL
MODULE
TCM:
TRANSMISSION CONTROL
MODULE
TP :THROTTLE
POSITION
ICM
: IGNITION CONTROL
MODULE
)
ECM
ICM(CONT) FRONT
CONSOLE
MODESW
MAIN
CASE
,}
~H-32
FUSE BOX
(C-3,
C-4,C-8,
C-10,
C-14)
BRAKE
SW
KICK DOWN
SW
ACCELERATOR PEDAL
1-9 INDICATOR LIGHT
(POWER, WINTER) 1-1 WARNING BOX (AfT
OIL
TEMP )
CHECK TRANS.
C-92 DIAGNOSIS CONNECTOR C-9 DATA
LINK CONNECTOR
}
(') 0 2
2 m a ::IJ r-0 (') !4 0 2
" t .... C1l N l> c: a s: !4 n -4 ::IJ l> 2 rA s: c;; rA 0 2 ~ ~ 0 I m

... ......,.
AUTOMATIC TRANSMISSION (4L30-E) 7A-155
ON-VEHICLE SERVICE
CHECKING TRANSMISSION FLUID
LEVEL
1. Park the vehicle on level ground.
2. Apply the parking brake.
3. Place the automatic transmission in "Park" and
start the engine.
Allow the engine to idle for
two minutes.
4. With the brakes applied, move the shifter lever
through all the gear ranges, ending in "Park".
5. Remove the dipstick, Carefully touch the
dipstick with your finger to determine the
temperature of the fluid. (Fig. 7A-14)
• If the fluid is cool or warm (approximately
room temperature) or slightly higher (but
not too hot to touch), the fluid level should
be within the "Cold" range.
• If the fluid is hot, the fluid level should be
(A; within the "Hot" range.
6.
Cold Hot
Fig. 7A-14
• If the vehicle has just been driven for a long
period of time at highway speeds or in city
traffic in hot weather, wait 30 minutes for
the fluid to cool down before checking fluid
level.
If fluid level is low, add enough DEXRON®-m
Automatic transmission fluid to bring trans­
mission
to its proper fluid level through the
transmission oil filler tube.
NOTE:
The automatic transmission fluid level must be
checked
with the vehicle at normal AfT oil
operating temperature: 75 TO 85°C (167 TO
185°F)
measured with TECH1 scan tool.
Overfilling or underfilling could result in
damage
to the transmission.
• If fluid level is low, inspect the area around
the oil pan for leakage.
•
If the fluid smells burnt or is black, replace
it.
CHANGING TRANSMISSION FLUID
There is no need to change the transmission fluid
unless the transmission is used under one or more
of the following heavy duty conditions.
A: Repeated
short trips
B: Driving on rough roads
C: Driving on dusty roads
D: Towing a trailer
If the vehicle is used under these conditions,
change the fluid every 20,000 miles (32,000 km.)
There is
no drain plug in the oil pan. Oil should be
extracted
with suitable suction device through the
filler tube. Alternately the fluid can be drained by
carefully removing the oil pan. Place a large drain
pan
under the oil pan, remove 13 bolts on the right,
left and front sides of the oil pan and loosen 3 bolts
on the rear side.
Drain
the fluid carefully.
Hold
the pan horizontally, remove the remaining 3
bolts and remove pan and gasket. Clean the oil pan
and
reinstall it . with a new gasket. It is also
recommended to replace the fixing bolts. Tighten
16 fixing bolts to 11 N·m (8 lb·ft.) torque.
MANUAL LINKAGE
~ INSPECTION
1. Make sure that when the shifter control lever is
shifted
from "P" to "L", a "clicking" can be felt
at each shift position. Make sure that the gear
corresponds
to that of the position plate
indicator.
2. Check to see if the shifter lever can be shifted
as
shown in Fig. 7A-15. jQ
~ Button must be pressed.
~ Button need not be pressed.
Fig. 7A-15

7A-160 AUTOMATIC TRANSMISSION (4L30-E)
TRANSMISSION (WITH TRANSFER CASE)
6
I
10 i
'
17 22
Removal steps
1. Skid plate 10. Front crossmember
2. Exhaust and transfer pretectors 11. Oil level gauge and guide tube
3. Rear propeller shaft
12. Stiffener
4. Front propeller shaft 13. Heat protector
5. Exhaust pipe
14. Starter
6. Front console
15. Flywheel under cover
7.
Selector lever assembly 16.
Air cleaner assembly
8. Transfer control lever
17. Harness
9. Transmission
oil cooler pipe
Fig. 7A-20
""' 19
8
7
7
20
18. Flywheel· Torque converter bolt 19. Rear mount nut 20. Third crossmember
21. Engine-transmission bolt
22. Transmission assembly
Installation steps
To
install, follow the removal
steps in the reverse order.
-A
•

1••1 REMOVAL
Preparation:
• Remove engine hood.
• Disconnect negative (-) battery cable.
1. Skid plate
2. Exhaust and transfer protectors
3. Rear propeller shaft
4. Front propeller shaft
5. Exhaust pipe
• Remove pre-catalytic converter, center pipe
and
front pipe.
• Disconnect Oxygen Sensor (025) sensor
connector
from the transmission harness
connector (Fig.
7A-21).
Fig. 7A-21
6. Front console
• Remove transfer control lever knob.
• Disconnect wiring harness connectors.
7. Selector lever assembly
• Disconnect shift lock cable from the selector
lever assembly
side (Fig. 7 A-22).
• Disconnect wiring harness connectors.
• Disconnect shift control rod from the
selector lever assembly side (Fig. 7 A-23).
Fig. 7A-22
AUTOMATIC TRANSMISSION (4L30·E) 7A-161
Fig. 7A-23
8. Transfer control lever
9. Transmission oil cooler
pipe
• Disconnect transmission oil cooler pipe
from AfT side.
• Remove oil pipe clamp bracket from engine
stiffener (Fig.
7 A-24).
• Loosen oil pipe clamp bolt at the engine
mount side.
Fig.
7A-24
10. Front crossmember
11.
Oil level gauge and guide tube
• Disconnect breather hoses from guide tube.
12.
Stiffener
• Remove five stiffener bolts.
13. Heat protector (Fig. 7A-25}
14.
Starter

7A-164 AUTOMATIC TRANSMISSION (4L30-E)
20. Third crossmember
~~~ Torque N·m(lb.ft) 50 (37)
19. Rear mount nut
~~~ Torque N·mOb·ft) 41 (30)
18. Flywheel-torque converter bolt
• Align
the flywheel-torque converter bolt boss
with the starter portion of the converter
housing
by turning torque converter.
• Install flywheel-torque converter bolts (3
pieces) by turning crankshaft (Fig. 7 A-29)
~~~ Torque N·mOb·ft) 54 (40)
Fig. 7A-29
17. Harness (fig. 7A-29a)
• Connect transmission and mode switch
harness connectors to engine harness.
• Connect harness clamp to engine harness
clamp bracket and radiator clip.
•
Connect ground harness to engine.
Fig. 7A-29a
16. Air
cleaner assembly
15. Flywheel under cover
~~~ TorqUte N·mOb·in)
14. Starter
~~~ Torqu,e N·m(lb·ft)
13. Heat protector
~~~ Torqu'e N·m(lb·in)
12. Stiffener
N·m(lb·ft)
11. Oil lever gauge and guide tube 6
(52)
40 (30)
6 (52)
48 (35)
• Connect breather hoses to guide tube.
10. Front crossmember
~~~ Torque N·m(lb·ft) I 78 (58)
9. Transmission oil cooler pipe
• Install transmission oil cooler pipe to
transmission.
~~~ Torqwe N·m(lb·ft) I 54 (40)
•
lnsta1ll oil pipe clamp bracket to engine
stiffener. .~
• Tighten oil pipe clamp bolt at engine mount
side.
8. Transfer control lever
7. Selector lever assembly
•
Connect shift control rod to selector lever
assembly.
•
Connect wiring harness connectors.
• Connect shift lock cable to selector lever
assembly.
6. Front cc>nsole
• Connect wiring harness connectors.
• Install transfer control lever knob.
5. Exhaust pipe
I~I ___ T_o_r_q~_ue __________________ 4-N_·_m_(l_b_·ft __ )
Exh. pipe
to exh. manifold 67 (49)
Center pipe
front side bolt 43 (32)
Pre-catalytic converter bolt 43 (32)
• Connect Oxygen Sensor (025) connector to
transmission harness connector.
4. Front propeller shaft
3. Rear propeller shaft
~~~ Torqwe N·mOb·ft) 63 (46)