2004 ISUZU TF SERIES ABS

7A2-10 TRANSMISSION CONTROL SYSTEM (AW30 –40LE) (V6 3.5L)

Control and Functions
Shift Control
The transmission gear is shifted according to the shift
pattern selected by the driver. In shifting gears, the
gear ratio is controlled by the ON/ OFF signal using the
shift solenoid S1 and the shift solenoid S2.
Band Apply Control
The band apply is controlled when in the 3 –2 downshift
(engine overrun prevention) and the garage shift (shock
control).
The band apply solenoid is controlled by the signal from
the Pulse Width Modulation (PWM) to regulate the flow
of the oil.
Torque Converter Clutch Control
The clutch ON/OFF is controlled by moving the
converter clutch valve through shifting Torque
Converter Clutch (TCC) solenoid using the ON/OFF
signal.
Line Pressure Control
The throttle signal allows the current signal to be sent
to the force motor. After receiving the current signal,
the force motor activates the pressure regulator valve
to regulate the line pressure.
On –Board Diagnostic System
Several malfunction displays can be stored in the
Transmission Control Module (TCM) memory, and read
out of it afterward.
The serial data lines, which are required for the testing
of the final assembly and the coupling to othe
r
electronic modules, can be regulated by this function.
Fail –Safe Mechanism
If there is a problem in the transmission system, the
TCM will go into a “backup" mode.
The vehicle can still be driven, but the driver must use
the select lever to shift gears.
Torque Management Control
The transmission control side sends the absolute spark
advance signal to the engine control side while the
transmission is being shifted. This controls the engine
spark timing in compliance with the vehicle running
condition to reduce the shocks caused by the change o
f
speed.
ATF Warning Control
The oil temperature sensor detects the ATF oil
temperature to control the oil temperature warning,
TCC, and the 3rd start mode.
Reverse Lock Out Control
With the selector lever in reverse position, the TCM will
not close the PWM solenoid until the vehicle is below
15 km/h (9.3 mph), thus preventing reverse
engagement above this speed.

Downhill Control
This mode is automatically activated from NORMAL
mode only when downhill conditions are recognized.
The shift pattern is identical to NORMAL mode except
3-4 and 4-3 shift lines at low throttle modified to get
engine braking on a larger speed range.
Uphill Control
When uphill condition are recognized the 2-3 and 3-4
shift and TCC apply are down only when the engine
torque is sufficient in order to avoid shift hunting.
Gear Shift Control 3rd start


SELECT LEVER RANGE SHIFT PATTERN
D(Drive) 1


2TCC

3TCC

4TCC
3(Third) 1

2TCC

3TCC
2(Second) 1

2(
3)
L(First) 1(
2)
TCC: Torque Converter Clutch
(Notice1): “( )" means over-revving prevention control.
Mode Type


Mode Type Select lever position
Normal drive mode
(NOR) Entire range (excluding “R")
Power drive mode
(PWR) Entire range (excluding “R")

Mode Selection



SWITCH(SW) LAMP
Mode Type PWR/N
OR.S 3RD
START SW POWER
DRIVE LAMP 3RD
START LAMP
Normal
drive mode
(NOR) OFF OFF OFF OFF
Power
drive mod
(PWR) ON OFF ON OFF
3rd Start
mode OFF ON OFF ON
However, the 3rd start switch prevails over the
PWR/NOR switch.
The mode become normal drive mode when the 3rd
start switch is operated from ON to OFF.

TRANSMISSION CONTROL SYSTEM (AW30 –40LE) (V6 3.5L) 7A2-29





4.
After choosing the data, click the "Next" button.
5.
When all the necessary information is entered, the
"details" of software within the database that
match the entered data will appear fo
r
confirmation. Click the "Program" switch and then
download the new software onto Tech-2.
6. "Data Transfer" comes on display. The progress o
f
downloading will be displayed on the screen in the
form of bar graph.
7.
Upon finishing the data transfer, turn off the powe
r
of Tech-2, removing from P/C.


4. Programming of ECM 1.
Check to see if batteries are fully charged, while
ABS connectors shall be removed from the
vehicle.
2.
Connect Tech-2 to Vehicle Diagnostic Connectors.
3.
Turn on the power of Tech-2 and the title screen
comes on display.
4.
Turn on the ignition (without allowing the engine to
start)
5.
On the title screen of Tech-2, push the "Enter"
button.
6.
Choose "F: Service Programming System" on the
main screen and then choose "Fl: Programming".
7.
While data is being transferred, "Downloading"
will be displayed on the Tech-2 screen.
8.
Upon finishing the data transfer, Tech-2 will
display "Reprogramming Successful". Push the
"Exit" button to bring program to completion.

9.
Following "Procedure 2: Demand of Data", try ove
r
again "Information Obtaining" and check to
confirm if the data has been correctly re-loaded.
10. Upon finishing confirmation, turn off the ignition o
f
the vehicle and then turn off the power of Tech-2,
removing from the vehicle.

TRANSMISSION CONTROL SYSTEM (AW30 –40LE) (V6 3.5L) 7A2-31

16 – Terminal Data Link Connector (DLC)
OBD standardizes Data Link Connector (DLC)
configurations. The DLC, formerly referred to as the
ALDL, will be a 16 –terminal connector found on the
lower right side of the driver's side instrument panel. All
manufacturers must conform to this 16 –terminal
standard.






060R300015






810RT022




PIN 1 – uart
PIN 2 – J1850 Bus + L line on 2–wire systems, or single wire (ECM)
PIN 3 – (Not used)
PIN 4 – Chassis ground pin
PIN 5 – Chassis ground pin
PIN 6 – ECM diagnostic enable
PIN 7 – KW2000
PIN 8 – (Not used)
PIN 9 – Primary UART
PIN 10 – (Not used)
PIN 11 – TCM diagnostic enable
PIN 12 – ABS diagnostic or CCM diagnostic enable
PIN 13 – SIR diagnostic enable
PIN 14 – (Not used)
PIN 15 – (Not used)
PIN 16 – Battery power from vehicle unswitched (4 AMP MAX.)

UNIT REPAIR (AW30–40LE) 7A4–5
Components (1)
Reassembly
1. Install a new gasket and the ex tension housing
(4
2) to the transmission case.
Torque: 36 N·m (27 Ib ft)
2. Install the speedometer driven gear, plate, and
speedometer sensor (4
2).
To r q u e :
Plate bolt – 15 N·m (11 Ib ft)
Speedometer sensor – 25 N·m (18 Ib ft)
3. Install the adapter housing (4
4).
Remove any gasket material on the contacting
surfaces of the adapter housing and transmission
case.
24 1RY 0 002 0
Apply liquid gasket (TB1281–B or its equivalent)
(1) and install the apply gaskets (2) to the adapter
housing as shown in the figure.
Install the adapter housing to the transmission
case.
Torque: 34 N·m (25 Ib ft)
4. Install the neutral start switch.
Using the transmission select lever, fully turn the
manual valve lever shaft back and return two
notches.
It is now in neutral.
Insert the neutral start switch onto the manual
valve lever shaft and temporarily tighten the
adjusting bolt.
Install the lock washer and nut.
Torque: 7 N·m (61 Ib in)Align the neutral standard line and the switch
groove and tighten the adjusting bolt.
Torque: 13 N·m (113 Ib in)
Bend the tabs of the lock washer.
NOTE: Bend at least two of the lock washer tabs.
RUW1 7A SH01 3601
5. Install the oil temperature sensor to the transmission
case.
Torque: 15 N·m (11 Ib ft)
RUW3 7A SH00 4001

DIAGNOSIS (JR405E) 7A2-23


4. After choosing the data, click the "Next" button.
5. When all the necessary information is entered, the "details" of software within the database that match the
entered data will appear for confirmation. Click the "Program" switch and then download the new software
onto Tech-2.
6. "Data Transfer" comes on display. The progress of downloading will be displayed on the screen in the form of
bar graph.
7. Upon finishing the data transfer, turn off the power of Tech-2, removing from P/C.


4. Programming of TCM
1. Check to see if batteries are fully charged, while ABS connectors shall be removed from the vehicle.
2. Connect Tech-2 to Vehicle Diagnostic Connectors.
3. Turn on the power of Tech-2 and the title screen comes on display.
4. Turn on the ignition (without allowing the engine to start)
5. On the title screen of Tech-2, push the "Enter" button.
6. Choose "F1: Service Programming System" on the main screen and then choose "F1: Programming ECU".
7. While data is being transferred, "Programming in Progress" will be displayed on the Tech-2 screen.
8. Upon finishing the data transfer, Tech-2 will display "Reprogramming was Successful". Push the "Exit" button
to bring program to completion.
9. Following "Procedure 2: Demand of Data", try over again "Information Obtaining" and check to confirm if the
data has been correctly re-loaded.
10. Upon finishing confirmation, turn off the ignition of the vehicle and then turn off the power of Tech-2,
removing from the vehicle.

7A3-4 ON-VEHICLE SERVICE (JR405E)
TRANSMISSION CONTROL MODULE (TCM)



RTW37ALF001901

Remove and Disconnect
1. Disconnect the negative battery cable.
2. Remove the connectors.
3. Remove the fixing nuts and remove the TCM (1)
from the bracket.
Note:
The TCM is fitted under instrument panel of the driver’s
compartment by means of three stud bolts.


Install or Connect
Follow the removal steps in the reverse order. Be
absolutely sure that the connectors are securely
fastened.
AT CONT