1997 ISUZU TFR SERIES Workshop Manual

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Electrical Equipment – Instruments
Terminal Assignment of wiring Harness Connector, Immobilizer Controller
1 Back up voltage supply
2 Voltage from ignition switch ON
3 Communication: carry on line from ECM
to immobilizer (Gas Engine)
Check Engine Lamp (Diesel Engine)
4 DWA (South Africa model only)
5N.C.
6 Antenna coil positive
7 Ground8 Communication: carry on line from
immobilizer to ECM (Gas Engine)
Communication: carry on line from
immobilizer to DDS-1 (Diesel Engine)
9To Tech 2
10 Speed sensor voltage (Gas Engine)
11 N.C.
12 N.C.
13 Antenna coil negative
14 Starter relay

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Electrical Equipment – Instruments
Function (Continued)
Car pass Card
Each vehicle has a car pass, which is issued to the customer on delivery of the vehicle along with the other papers.
For this, a card is used, similar to the conventional radio passes.
Note:
This car pass is an important document and must be treated with the same care as the vehicle papers. It
must not be kept in the vehicle. The customer must present the car pass for operations involving the
immobilizer or the engine control unit.

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Checking Component Required
Tech 2
Tech 2 software 01MY TFR/S immobilizer system
DLC kit for 16 pin diagnostic plug
Key cutter
Tech 2 illustration

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lmportant information on Programming
Security code
If the immobilizer and engine control unit are replaced at the same time, the immobilizer control unit must be
programmed first before the “IMMOBILIZER” function in the engine control unit can be activated.
The security code protects the immobilizer control unit against unauthorized programming and data access from
Tech 2. The security code consists of a 4 digit code number and is programmed into the immobilizer control unit
and ECM (Engine Control Module; Gas Engine only).
New control units are not programmed with a security code. If the control units are replaced, the security code
entered in the car pass, transponder lD, etc. must be programmed into the new control unit with Tech 2.
The security code can only be programmed with Tech 2 once and must therefore be performed with great care.
Once programmed, the security code cannot be overwritten.
An already used immobilizer can be reused in a different car by initializing the immobilizer.
After that you can program the security code again. For initializing command you need the current security code.
If the immobilizer control unit is returned (e.g. warranty cases), always enclose the security code that is allocated to
that control unit. If this is not done, we can not process the case and the warranty will not be recognized.
1. Entering a code
If the Tech 2 display requests the
security code
mechanical key number
Vehicle Identification No.
to be entered, process as follows;
To input a digit you need to use the up and down buttons of the Tech 2. By using the numeric buttons, the
according digit will be displayed at the current position and the cursor will move to the next position.
For letters you need to use the up and down buttons of the Tech 2. The up and down key might be used for
digits as well. By using the up and down buttons, the displayed digit or letter will be increased or decreased. To
move to the next position you need to use the move-to-right-button.
With the two buttons, move-to-right and move-to-left you can select the position of number you want to change.
This will allow you to correct a wrong number.
After the number is completed you need to press the Enter button to accept the number.
Correction is now no longer possible.
Use the OKAY soft key to program the number and the NOT OKAY soft key to abort the programming.

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2. Getting started
Operate Tech 2 to get the following screen as start.
Select “Body” in System Selection Menu.
The following table shows.
F0: Diagnostic Trouble Codes
F0: Read DTC Info Ordered By Priority
F1: Read DTC Info As Stored By ECU
F2: Clear DTC Information
F1: Data Display
F2: Snapshot
F3: A c tua tor Te s t
F0: Immobilizer Relay Output Test
F4: Additional Functions
F0: Read ECU Identification
F1: Reset Immobilizer
F2: Erase Transponder - Keys
F5: Programming
F0: Program Immobilizer Function
F1: Program Transponder - Keys
F2: Program Mechanical Key Number
F3: Program Diesel Cutoff Solenoid
Note:
Before going to programming process, Tech 2 indicates instruction as follows.
See Checking Procedure Before
Programming!
Confirm

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3. Transponder
If a transponder key is lost;
All transponder keys in the immobilizer control system must be erased. Transponder keys can be ordered via
the "Your proper organization name such as Parts and accessory department" as previously by providing the
mechanical key number.
The mechanical key number is provided on the car pass.
Thereafter, existing and new transponder keys are programmed consecutively using Tech 2. The vehicle can
then no longer be started using lost key.
5 transponder keys can be provided:
Each transponder has different Identifications. If a customer wants more than 2 transponder keys, maximum to
5 transponder keys can be provided by additional programming by Tech 2.
lf a new ignition key with different mechanical key number needs to be installed;
If installation of an ignition lock with a different mechanism key number is necessary (an ignition lock which
belongs to the mechanical key number has to be ordered first), all transponder keys must first be erased and
the two transponder keys which belong to the ignition lock that is now installed must be programmed.
The new mechanical key number must be programmed now into the immobilizer. The mechanical key number
in the car pass is to be changed as well.
Transponder program
1. Connect Tech 2, select "Body" and "Immobilizer".
2. Select program TP-Key mode.
3. See immobilizer status on Tech 2 screen, and enter security code. If the status does not allow the
programming, only immobilizer status is displayed.
4. Insert Non-programmed Transponder-key and press soft key of "Confirm".
Insert Non-programmed Transponder - Key!
Confirm
5. "Turn On ignition key", is displayed if the ignition is Off.
6. The transponder status is displayed if the status does not allow the programming.
7. When programming starts "Programming Transponder - Key!" is displayed.
8. Turn Off Ignition key.
9. Turn On Ignition.
10. If the programming was not successful, the transponder status is only displayed.

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11. To program more illustration press soft key.
Program more Keys!
YESNO
12. See programming result.
Erase transponder key
1. Select Erase TP-Key mode.
2. See immobilizer status on Tech 2 screen and type security code. If the status does not allow the
programming, only immobilizer status is displayed.
3. See illustration of caution.
CAUTION: All Transponder-Keys Will Be Erased!
Confirm
Erasing Transponder-Keys CAUTION Erase
4. See programming result on display.

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4. Reset Immobilizer ICU (Immobilizer Control Unit) (Gas Engine Model)
CAUTION:
Do not reset immobilizer ICU for diesel engine models.
1. Select “Body” and “Immobilizer”.
2. Select “Additional Function” and “Reset Immobilizer”.
3. Enter the security code and press Confirm.
4. Reset Immobilizer screen shows up with warning. See the following screen.
Do this only before replace the immobilizer ECU
ConfirmReset Immobilizer
Warning: Engine will not start after reset!
5. When reset is completed, the following screen shows up.
Program completed
Confirm