Isuzu Trooper (1998-2002 year). Manual - part 705

AUTOMATIC TRANSMISSION (AW30-40LE)

7A–17

DIAGNOSIS WITH TECH2

In this AW30-40LE transmission, troubleshooting can be
performed for electrical faults using the Tech2 scan tool.
If the CHECK TRANS lamp blinks, or if an electrical fault in the
transmission may probably exist, check trouble codes using the
Tech2 scan tool. 
In the diagnostic procedures described in this manual, first
repair the faulty positions indicated by trouble code in the order
of numbers and then perform troubleshooting for the faulty
positions that are not indicated by trouble code. For correct
troubleshooting, it is necessary to first repair the trouble codes
of lower-order numbers, then to repair the trouble codes of
higher-order numbers in sequence.

How to Use This Manual:
Check trouble codes using the Tech2 scan tool.

If no codes are set:

• Refer  to

 F1: Data Display

 and identify the electrical faults

that are not indicated by trouble code.

If codes are set:

• Record all the codes displayed by the Tech2 and check if the

codes are intermittent (intermittent faults).

• Clear the codes.

• Drive the vehicle for a test to reproduce the faulty status.

• Check trouble codes again using the Tech2.

• If no code is displayed by test driving, the fault is intermittent.

In this case, refer to the cautions on intermittent conditions.

• If a code is present, refer to "DIAGNOSTIC TROUBLE

CODES (DTC) CHECK" for diagnosis.

• Because a code of high-order number may be set for the

reason that a code of low-order number has been set after
occurrence of a fault, perform repair work starting with a
lower-order number is ascending order.

7A–18

AUTOMATIC TRANSMISSION (AW30-40LE)

901RW176

F07RW033

740RY00013

740RY00014

901RY00014

TECH2 CONNECTION

The Tech2 scan tool is used to electrically diagnose the
automatic transmission system and to check the system. The
Tech2 enhances the diagnosis efficiency though all the
troubleshooting can be done without the Tech2.
The Tech2 is a portable, compact, and light tester. When it is
connected to the diagnosis connector of the vehicle, you can
perform a variety of diagnoses and tests by communicating
with the Transmission Control Module (TCM) of the vehicle.

1. Configuration of Tech2

1. Tech2 scan tool kit (No. 7000086), Tech2 scan tool (No.

7000057) and DLC cable (No. 3000095)

2. SAE16/19 adapter (No. 3000098) (1), RS232 loop back

connector (No. 3000112) (2), and PCMCIA card (No.
3000117) (3)

2. Tech2 Connection

•Observe the Tech2 User Guide.

1. Check the ignition is OFF.

2. Insert the ISUZU 2000 system PCMCIA card (1) into the

Tech2 (4).

3. Connect the SAE16/19 adapter (2) to the DLC cable (3).

4. Connect the DLC cable (3) to the Tech2 (4).

5. Connect the SAE16/19 adapter (2) to the diagnosis

connector of the vehicle.

6. Turn the ignition of the vehicle ON and press the "PWR"

key of the Tech2.

•Check the display of the Tech2.

NOTE:  
Be sure to check that the power is not supplied to the
Tech2 when attaching or removing the PCMCIA card.

AUTOMATIC TRANSMISSION (AW30-40LE)

7A–19

TECH2 OPERATING FLOW CHART (START UP)

060RY00110

7A–20

AUTOMATIC TRANSMISSION (AW30-40LE)

Once the test vehicle has been identified an “Application
(Powertrain) Menu" screen appears. Please select the
appropriate application.
The following table shows, which functions are used for
the available equipment versions.

Diagnostic Trouble Codes
The purpose of the “Diagnostic Trouble Codes" mode is
to display stored TCM trouble codes.
When “Diagnostic Trouble Codes" is selected an
“Application Menu" screen appears.

Clear DTC Information
The purpose of the “Clear DTC Information" mode is to
command the clearing of stored TCM trouble codes.
When “Clear DTC Information" is selected, a “Clear
DTC Information", warning screen appears. This screen
informs you that by cleaning DTC's, “all stored DTC
information in controller will be erased".
Do you want to clear DTC's (Yes/No).
Press either the Yes or No key when answering.
After clearing codes, confirm system operation by test
driving the vehicle.
Allow the vehicle to shift through all four forward gears in
a manner which attempts to repeat the failure condition.

NOTE:  When the trouble has not been repaired and the

trouble code cannot be erased, check the vehicle again.

DTC Information
When “DTC Information" is selected, an “Application
Menu" appears with a list of DTC information function
keys addressing DTC specifics and their origins.
Function key selections may vary for particular vehicle
and/or system.

Data Display
The purpose of the “Data Display" mode is to
continuously monitor data parameters.
The current actual values of all important sensors and
signals in the system are display through F1 mode.
When “Data Display" is selected an “Application Menu"
appears.
See “TRANSMISSION DATA" and “TCC DATA” on next
page.

Snapshot
When “Snapshot" is selected an “Application Menu"
appears.
When “Transmission Snapshot" application is selected
from the “Application Menu", a “Snapshot Menu"
appears, displaying several options. “Snapshot" options
may vary from one system to another.
“Snapshot" allows a recording of all vehicle parameters.
There parameters may then be replayed at a future
point in time.
This action allows you to focus on making the condition
occur, rather than trying to view all of the data in
anticipation of the fault. The snapshot will collect
parameter information around a trigger point that you
select.
When a snapshot is taken. It is recorded onto the
PCMCIA memory card. When the Tech2 is powered
down. Snapshots are not lost.

Actuator Tests
The purpose of “Actuator Tests" mode is to check for
correct operation of electronic system actuators.

Lamps
You can operate the lamps by pressing the ON and OFF
buttons.
Preconditions: P or N position

Solenoid
Solenoid S1(1-2/3-4), S2(2-3) and TCC Solenoid
(Torque Converter Clutch)
You can operate the solenoids by pressing the ON and
OFF buttons.
Preconditions: P or N position, no vehicle speed, no
engine speed
Pressure Control Solenoid (PCS)
You can operate the PC Solenoid by pressing the ON
and OFF buttons. ON will command a maximum current
of 1000 mA and OFF a minimum of 200 mA.
Preconditions: P or N position, no vehicle speed, engine
running

F0: Diagnostic Trouble Codes

F0: Read DTC Info Ordered By Priority

F1: Clear DTC Information

F2: DTC Information

F0: History

F1: MIL SVS or Message Requested

F2: Last Test Failed

F3: Test Failed Since Code Cleared

F4: Not Ran Since Code Cleared

F5: Failed This Ignition

F1: Data Display

F0: Transmission Data

F1: TCC Data

F2: Snapshot

F3: Actuator Tests

F0: Lamps

F0: Check Light Test

F1: Power Lamp Test

F2: Winter Lamp Test

F3: AT Oil Temperature Lamp Test

F1: Solenoids

F0: Solenoid 2-3 Test

F1: Solenoid 1-2/3-4 Test

F2: TCC Solenoid Test

F3: Pressure Control Solenoid (PCS)