2004 ISUZU TF SERIES warning

TRANSFER CONTROL SYSTEM 7D1-15
Transfer-related indicator lamp and switch function
Skip operation
Item 4WD
lamp 4L lampNeutral
lamp Check
4WD
warning
light 4WD
switch Actuator
detectio
n (limit)
switches
LS1,
LS2,
LS3. and
LS4
1 = on
2 = off Transfer
4WD
switch Transfer
neutral
switch SOF
actuator
switch
Or
Axle
dummy Remarks
2H Off Off Off Off No
operation1,0,1,0 Open Open Open -----
4L start of
operation Off Off Off Off 4L
position
for 0.1
second 1,0,1,0 Open Open Open Switch
operation
sensor
Start of
operation Blinking
(2HZ) Blinking
(2HZ) Off Off No
operation1,1,1,0
0,0,1,0
0,1,1,0
0,1,1,1 Open Open Open 2H to 4H
while
driving
During
operation
(Synchro) Blinking
(2HZ) Blinking
(2HZ) Off Off No
operation1,1,1,0
0,0,1,0
0,1,1,0
0,1,1,1 Open Open Open 2H to 4H
using
synchro
and retrial
During
operation
(Passing
through
4H) Off Blinking
(2HZ) Off Off No
operation0,0,1,1 Closed Open Open -----
During
operation
(Passing
through
4H) Off Blinking
(2HZ) Off Off No
operation0,0,1,1
0,1,0,1 Closed Open Open -----
During
operation
(N)
On Blinking
(2HZ) Off Off No
operation
0,0,1,1
0,1,0,1 Closed Open Closed -----
During
operation
(N) On Blinking
(2HZ) Off Off No
operation0,1,0,0 Closed Open Closed Switch
operation
sensor
During
operation
(N) On Blinking
(2HZ) Off Off No
operation0,0,1,1 Closed Open Closed 4H to 4L
while
driving
During
operation
(Axle
drive) Blinking
(2HZ) Blinking
(2HZ) Off Off No
operation0,0,1,1 Closed Open Open -----
Axle
waiting Blinking
(2HZ) Blinking
(2HZ) Off Off No
operation0,0,1,1 Closed Open Open -----
4L waiting On Blinking
(2HZ) Off Off No
operation1,1,0,1 Closed Closed Closed 4H to 4L
while
waiting
4L On On Off Off No
operation1,1,0,1 Closed Open Closed -----

TRANSFER CONTROL SYSTEM 7D1-17
Skip operation limitations (4L




2H) (Vehicle speed, engine speed, and transmission position not
specified)

Item 4WD
lamp 4L lampNeutral
lamp Check
4WD
warning
light 4WD
switch Actuator
detection
(limit)
switches
LS1, LS2,
LS3. and
LS4
1 = on
2 = off Transfer
4WD
switch Transfer
neutral
switch SOF
actuator
switch
Or
Axle
dummyRemarks
4L Off On Off Off Open 1,1,0,1 Closed Open Closed -----
4L start of
operation Off On Off Off 2H
position
for 0.1
second 1,1,0,1 Closed Open Closed -----
10
second
display
during
limitation Blinking
(4HZ) Off Off Off Open 1,1,0,1 Closed Open Closed No
operation
during
limitation
Go to 4L
after 10
seconds
Off ON Off Off Open 1,1,0,1 Closed Open Closed -----

Skip operation limitations (2H




4L) (Vehicle speed, engine speed, and transmission position not
specified)

Item 4WD
lamp 4L lampNeutral
lamp Check
4WD
warning
light 4WD
switch Actuator
detection
(limit)
switches
LS1, LS2,
LS3. and
LS4
1 = on
2 = off Transfer
4WD
switch Transfer
neutral
switch SOF
actuator
switch
Or
Axle
dummyRemarks
2HL Off Off Off Off Open 1,0,1,0 Open Open Open -----
4L start of
operation Off Off Off Off 2H
position
for 0.1
second 1,0,1,0 Open Open Open -----
10
second
display
during
limitation Blinking
(4HZ) Blinking
(4HZ) Off Off Open 1,0,1,0 Open Open Open No
operation
during
limitation
Go to 2H
after 10
seconds
Off Off Off Off Open 1,0,1,0 Open Open Open -----


Under some conditions, a secondary operational indication may be received when the 4Hz operational
indication is present.

7D1-18 TRANSFER CONTROL SYSTEM
Transfer-related indicator lamp and switch function
2H
Neutral
2H
Item 4WD
lamp 4L lampNeutral
lamp Check
4WD
warning
light 4WD
switch Actuator
detectio
n (limit)
switches
LS1,
LS2,
LS3. and
LS4
1 = on
2 = off Transfer
4WD
switch Transfer
neutral
switch SOF
actuator
switch
Or
Axle
dummy Remarks
2H Off Off Off Off No
operation1,0,1,0 Open Open Open -----
Neutral
start of
operation Off Off Off Off Neutral
position
for 10
seconds1,0,1,0 Open Open Open Switch
operation
sensor
Start of
operation Off Off Blinking
(2HZ) Off No
operation1,1,1,0
0,0,1,0
0,1,1,0
0,1,1,1 Open Open Open 2H to 4H
while
driving
During
operation
(Synchro) Off Off Blinking
(2HZ) Off No
operation1,1,1,0
0,0,1,0
0,1,1,0
0,1,1,1 Open Open Open 2H to 4H
using
synchro
and retrial
During
operation
(Passing
through
4H) Off Off Blinking
(2HZ) Off No
operation0,0,1,1 Closed Open Closed -----
During
operation
(Passing
through
4H) Off Off Blinking
(2HZ) Off No
operation0,0,0,1
0,1,0,1 Closed Open Closed 4H to 4L
while
driving
During
operation
(N)
Off Off Blinking
(2HZ) Off No
operation
0,0,0,1
0,1,0,1 Closed Closed Closed
4H to 4L
through
neutral
During
operation
(N) Off Off Blinking
(2HZ) Off No
operation0,1,0,0 Closed Closed Closed Switch
operation
sensor
Neutral Off Off On Off No
operation0,1,0,0 Closed Closed Open -----
2H start of
operation Off Off On Off 2H
position
for 10
seconds0,1,0,0 Closed Open Closed Switch
operation
sensor
During
operation
(Passing
through
N) Off Blinking
(2HZ) Off Off No
operation0,1,0,0 Closed Closed Closed 4L to 4H
through
neutral
During
operation Off Blinking
(2HZ) Off Off No
operation0,1,0,1
0,0,0,1 Closed Closed Closed 4L to 4H
while
driving

TRANSFER CONTROL SYSTEM 7D1-19
Item 4WD
lamp 4L lampNeutral
lamp Check
4WD
warning
light 4WD
switch Actuator
detectio
n (limit)
switches
LS1,
LS2,
LS3. and
LS4
1 = on
2 = off Transfer
4WD
switch Transfer
neutral
switch SOF
actuator
switch
Or
Axle
dummy Remarks
During
operation
(4H
waiting) Off Blinking
(2HZ) Off Off No
operation0,0,1,1 Closed Closed Closed 4L to 4H
while
waiting
During
operation
(Axle) Blinking
(2HZ) Off Off Off No
operation0,1,1,1
0,1,1,0
0,0,1,0
1,1,1,0 Closed Open Closed 2H to 4H
while
driving
During
operation
(Axle) Blinking
(2HZ) Off Off Off No
operation0,1,1,1
0,1,1,0
0,0,1,0
1,1,1,0 Open Open Closed Axle
driving
Axle
waiting
Blinking
(2HZ) Off Off Off No
operation1,0,1,0 Open Open Closed -----
2H Off Off Off Off No
operation1,0,1,0 Open Open Open -----


Operational restrictions (vehicle speed, engine speed, and transmission position) are applicable to transfer
shifts in both directions (H
Neutral
L).

7D1-20 TRANSFER CONTROL SYSTEM
4H




Neutral




4H
Item 4WD
lamp 4L lampNeutral
lamp Check
4WD
warning
light 4WD
switch Actuator
detection
(limit)
switches
LS1, LS2,
LS3. and
LS4
1 = on
2 = off Transfer
4WD
switch Transfer
neutral
switch SOF
actuator
switch
Or
Axle
dummyRemarks
4H On Off Off Off No
operation0,0,1,1 Closed Open Closed -----
Neutral
start of
operation On On Off Off Neutral
position
for 10
seconds 1,1,0,1 Closed Open Closed -----
Start of
operation Off Off Blinking
(2HZ) Off No
operation1,1,0,0 Closed Open Closed 4L to N
while
driving
During
operation
(N) Off Off Blinking
(2HZ) Off No
operation1,1,0,0 Closed Closed Closed 4L to N
with axle
driving
During
operation
(N) Off Off Blinking
(2HZ) Off No
operation0,1,0,0 Closed Closed Closed 4L to 4N
with axle
removed
During
operation
(Axle) Blinking
(2HZ) Off Off Off No
operation0,1,1,1
0,1,1,0
0,0,1,0
1,1,1,0 Open Open Closed Axle
driving
Axle
waiting
Blinking
(2HZ) Off Off Off No
operation1,0,1,0 Open Open Closed -----
Neutral Off Off On Off No
operation0,1,0,0 Closed Closed Open -----
4H start
of
operation Off Off Off Off 2H
position
for 10
seconds 0,1,0,0 Open Open Open Switch
operation
sensor
During
operation
(N) Off Blinking
(2HZ) Off Off No
operation1,1,0,0 Closed Closed Open 4L to 4H
through
neutral
During
operation
(N) Off Blinking
(2HZ) Off Off No
operation0,1,0,0 Closed Closed Open 4L to 4H
through
neutral
During
operation Off Blinking
(2HZ) Off Off No
operation0,1,0,1
0,0,0,1 Closed Closed Open 4L to 4H
while
driving
4H
waiting Blinking
(2HZ) Off) Off Off No
operation0,0,1,1 Closed Closed Open 4L to 4H
while
waiting
During
operation
(Axle) Blinking
(2HZ) Off Off Off No
operation0,0,1,1 Closed Open Open Axle
driving
Axle
waiting
Blinking
(2HZ) Off Off Off No
operation0,0,1,1 Closed Open Open -----
4H On Off Off Off No
operation0,0,1,1 Closed Open Closed -----

7D1-22 TRANSFER CONTROL SYSTEM
4L




Neutral




4L

Item 4WD
lamp 4L lampNeutral
lamp Check
4WD
warning
light 4WD
switch Actuator
detection
(limit)
switches
LS1, LS2,
LS3. and
LS4
1 = on
2 = off Transfer
4WD
switch Transfer
neutral
switch SOF
actuator
switch
Or
Axle
dummyRemarks
4L On On Off Off No
operation1,1,0,1 Closed Open Closed -----
Neutral
start of
operation On On Off Off Neutral
position
for 10
seconds 1,1,0,1 Closed Open Closed -----
Start of
operation Off Off Blinking
(2HZ) Off No
operation1,1,0,0 Closed Open Closed 4L to N
while
driving
During
operation
(N) Off Off Blinking
(2HZ) Off No
operation1,1,0,0 Closed Closed Closed 4L to N
with axle
driving
During
operation
(N) Off Off Blinking
(2HZ) Off No
operation0,1,0,0 Closed Closed Closed 4L to 4N
with axle
removed
During
operation
(Axle) Blinking
(2HZ) Off Off Off No
operation0,1,0,0 Closed Closed Closed Axle
driving
Axle
waiting
Blinking
(2HZ) Off Off Off No
operation0,1,0,0 Closed Closed Closed -----
Neutral Off Off On Off No
operation0,1,0,0 Closed Closed Open -----
4L start of
operation Off Off On Off 4L
position
for 10
seconds 0,1,0,0 Open Open Open Switch
operation
sensor
During
operation
(N) Off Blinking
(2HZ) Off Off No
operation1,1,0,0 Closed Closed Open 4H to 4L
through
neutral
During
operation
(N) Off Blinking
(2HZ) Off Off No
operation1,1,0,0 Closed Closed Open 4H to 4L
through
neutral
During
operation
(N) Off Blinking
(2HZ) Off Off No
operation1,1,0,0 Closed Closed Open 4H to 4L
through
neutral
4H
waiting On Blinking
(2HZ) Off Off No
operation1,1,0,1 Closed Closed Open 4L while
waiting
During
operation
(Axle) Blinking
(2HZ) Off Off Off No
operation1,1,0,1 Closed Open Open Axle
driving
Axle
waiting
Blinking
(2HZ) Off Off Off No
operation1,1,0,1 Closed Open Open -----
4H On On Off Off No
operation1,1,0,1 Closed Open Closed -----

Operational restrictions (vehicle speed, engine speed, and transmission position) are applicable to transfer
shifts in both directions (H
Neutral
L).

7A2-2 TRANSMISSION CONTROL SYSTEM (AW30 –40LE) (V6 3.5L)

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, REFE
R
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, o
r
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 AW30-40LE 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:
 Normal mode –Normal shift pattern.
 3rd Start mode –Starts in 3rd gear to reduce
slippage on ice or snow.
 Power mode has a delayed up shift 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 AW30-40LE 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 powe
r
train.
Also, a lockup mechanism in the torque converter
reduces fuel consumption.
 Wide gear ratio and high torque rate of torque
converter provide excellent starting performance.

7A2-6 TRANSMISSION CONTROL SYSTEM (AW30 –40LE) (V6 3.5L)

TCM Point Table



RTW37ASF000101-1


PIN No. SIGNAL NAME
A1 GND
A2 PRESSURE CONTROL SOLENOID GND
A3 —
A4 PRESSURE CONTROL SOLENOID
A5 L-up SOLENOID
A6 STARTER SW(IG1)
A7 CAN COMMUNICATION (-)
A8 —
A9 —
A10 —
A11 T/M OIL TEMPERATURE SENSOR
A12 T/M OIL TEMPERATURE SENSOR GND
A13 —
A14 —
A15 SHIFT SOLENOID (S2)
A16 SHIFT SOLENOID (S1)
A17 CAN COMMUNICATION (+)
A18 —
A19 —
A20 —
A21 —
A22 —
A23 GND
A24 BATTERY

PIN No. SIGNAL NAME
B1 NEUTRAL START SW (R)
B2 POWER LAMP
B3 CHECK TRANS LAMP
B4 PATTERN SELECT SW (3rd START)
B5 SPEED SENSOR (+)
B6 INPUT REVOLUTION SENSOR (+)
B7 NEUTRAL START SW (D)
B8 NEUTRAL START SW (N)
B9 NEUTRAL START SW (3)
B10 3rd START LAMP
B11 OIL TEMPERATURE WARNING LAMP
B12 DIAGNOSIS TERMINAL
B13 PATTERN SELECT SW (POWER)
B14 SPEED SENSOR (-)
B15 —
B16 INPUT REVOLUTION SENSOR (+)
B17 —
B18 NEUTRAL START SW (L)
B19 NEUTRAL START SW (2)
B20 NEUTRAL START SW (P)
B21 TRANSMISFER LOW 4 SW
B22 BRAKE LAMP SW
B23 DIAGNOSIS OUT PUT
B24 —
B25 —
B26 CRUISE CONTROL UNIT