1997 ISUZU TFR SERIES ignition

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System outline
The immobilizer system consists of the four major components, which are DDS-1, Engine Control Module (ECM),
Immobilizer Control Unit (lCU), and transponder.
See page 6 for Gas engine, page 7 for Diesel Engine.
This system can be activated by a correctly programmed transponder and starter switch is set to OFF. This system
can be deactivated by a correctly programmed Transponder Key connected with a correctly programmed ECM and
a correctly programmed immobilizer lCU.
While the system is On
ln case of Gas engine;
The starter cut off relay deactivates function of starter, and the fuel injector power source is deactivated also.
ln case of Diesel engine;
The starter cut off relay deactivates function of starter, and the pump is deactivated also.
What happens without proper transponder operation?
One of the function of transponder is to deactivate or activate starter function. lf the proper transponder is not used,
starter cannot be operated. Because starter cut off relay stays On, cranking engine is not possible.
After the starter cut off relay is deactivated, transponder signal triggers to let immobilizer lCU calculate by
transponder address signal and immobilizer algorithm.
When the result matches with necessary condition, it makes injector power source be activated.
If transponder does not send correct signal, immobilizer lCU and ECM do not activate injector system On. Therefore
the vehicle cannot be operated.
No proper transponder is available, what should be done for the system?
When any proper transponder is not available, a new transponder should be programmed. Up to 5 transponders
can be provided with Tech 2 and by proper procedure. See pages 14-15.
In addition to the absence of proper transponder, it may happen particular secret code to the particular vehicle is
missing. ln this case, the secret code must be provided by your organization (refer to “loss of car pass” on pages
24, 25). Otherwise transponder cannot be programmed in any way.
lf the essential tool Tech 2 for programming and proper software for Tech 2 are not available, there is no permanent
way to fix system. Temporary replace with new ECM, new ECU and new transponder without any secret code can
make the system be deactivated, but it does not last long. Such a replacement does not solve any condition. Even
after replacement, the system is activated automatically in short time and then no operation of the vehicle can be
made in any way.
Tech 2 should be provided in your organization. See page 12.
Caution to the operation
lf an attempt is made to start the engine while the immobilizer system is activated, the CHECK ENGINE indicator
flashes and the engine will not start. See the illustration at the bottom of this page.
Summary of operation
Switch On: Set the ignition and starter switch to OFF.
(Activate)
Switch Off: Set the ignition and starter switch to ON by using the transponder key.
(Deactivate)

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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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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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10. Enter Mechanical key number.
Mechanical Key Number:
- - - - - - -
Press ENTER Key to continue
Not
OkayOkay
Enter Key No. Input Screen
11. Turn ON ignition.
Ignition Status Off 0V

Turn Ignition On! Turn On Ignition
12. See the programming result.
Tech 2 displays the result of programming as the following.
Follow those instructions.
Selected Programming is not possible due to wrong System Status!
Immobilizer Not Programmed!
Immobilizer Already Programmed!
ECM Not Programmed!
ECM Already Programmed!
13. Transponder key must be reprogrammed, because all transponder information is erased
when ICU is programmed. See Transponder programming.

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9. Turn ON ignition.
Ignition Status Off 0V

Turn Ignition On! Turn On Ignition
10. See the programming result.
Tech 2 displays the result of programming as the following.
Follow those instructions.
Selected Programming is not possible due to wrong System Status!
Immobilizer Not Programmed!
Immobilizer Already Programmed!
ECM Not Programmed!
ECM Already Programmed!
11. Transponder key must be reprogrammed, because all transponder information is erased
when ICU is programmed. See Transponder programming.
Program ECM
1. Procedure is the same as Program Immobilizer ICU procedure steps 1 through 5.
2. Turn On Ignition.
3. Select an Engine system.
4. See the display of programming result.
Program ECM / Immobilizer ICU
Caution:
1) Do not replace ICU and ECM at the same time.
2) Change ICU at first or ECM and other one change follows.
Follow Program Immobilizer ICU steps 1 through 6, procedure is the same as program
Immobilizer ICU procedure steps 1 through 6.
1. Input the security code.
2. Enter VIN.
3. Enter Key No.
4. Select an engine system.
See programming result display and follow instructions of the display.
5. Transponder key must be reprogrammed, because all transponder information on ICU is Erased when
ICU is programmed. See Transponder programming.
6. Follow program ECM steps 1 through 8.

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9. Turn the ignition switch OFF/ON following the screen.
10. The following screen shows up.
Program Diesel Cutoff Solenoid
(1) 2001 (TF) LUV
Electronic System: Immobilizer
0100%
11. Follow the screen procedure.
12. Confirm that there is frequent rattling every 10 seconds.
Program Diesel Cutoff Solenoid
Frequent Rattling Every 10 Seconds?
(1) 2001 (TF) LUV
Electronic System: Immobilizer
NOYES
13. Confirm the following screen shows up.
Program Diesel Cutoff Solenoid
Reconnect Fuse Glow Plugs!
(1) 2001 (TF) LUV
Electronic System: Immobilizer
Confirm

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Diagnostic procedure
System guidance
Engine does not run when any Diagnostic Trouble Code (DTC) is flagged, starting from 01MY TFR/S.
Once the cause of DTC is repaired or gone, engine can be operated normally, and present DTC becomes
history code.
History code is canceled by no repeat failure on 25 consequence ignition key On afterward.
History code cannot be canceled by battery connector disconnected, starting from 01MY
Diagnostic Trouble Code (DTC) list
Code
(BCD)Item Detecting Condition
B0011 TRANSPONDER
KEY PROBLEMTransponder code unsuccessfully read 5 consecutive time.
(Not completely read in 500ms transponder code)
B0012 WRONG
TRANSPONDER
KEYTransponder code read from the ignition key does not match the
transponder code stored in the control unit.
B0013 IMMOBILIZER NOT
PROGRAMMEDImmobilizer program no executed.
B0014 NO TRANSPONDER
KEY PROGRAMMEDProcessing to save the transponder key in the control unit not
executed.
B0015 VEHICLE SPEED
SIGNAL Lo (Gas)
FREQUENCY
SIGNAL Lo (Diesel)Lo level (2.5v or less) input during the Hi level was being output
in the immobilizer signal. (Gas)
Lo level (2.5v or less) input during the Hi level was being output to the
communication line. (Diesel)
B0016 VEHICLE SPEED
SIGNAL Hi (Gas)
FREQUENCY
SIGNAL Hi (Diesel)Hi level (more than 2.5v) input during the Lo level was being output in
the immobilizer signal. (Gas)
Hi level (more than 2.5v) input during the Lo level was being output to
the communication line. (Diesel)
B0017 NO ENGINE
REQUEST
RECEIVEDNo request signal received from the engine control unit in a second
after the ignition key has been placed at ON.
(Gas engine only)
B0023 ANTENNA COIL
OPENAntenna coil not connected.
B0024 WRONG
TRANSPONDER
RESPONSETransponder response signal with the challenge is wrong.
B0025 WRONG ENGINE
REQUESTThe challenge signal from the engine control unit is invalid.
(Gas engine only)
B0055 EEPROM ERROR Write and read cannot be correctly made to and from the EEPROM in
the control unit.

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Diagnostic procedure
No DTC indicates
Engine does not start to run even though all engine and electrical system are OK, and no DTC appears.
1. 12V power is not supplied to ICU.
Check engine light
Is blinking at 2Hz.ECM or electrical
unit wiring check No
Yes Yes
Starter is not rotated
By correct key at all.Check DTC with Tech 2
12V power is not
supplied to ICU
Repair 12V circuitICU power supply turns off when both +B line
and ignition switch line turn off.
ICU
No.1 Pin
No.2 Pin+B
Ignition SWCheck both wiring systems for continuity.
No
2. Engine does not start after steering assembly is repaired.
Check if connector for Antenna coil circuit at steering shaft is correct, or missing connection.
If not correct, replace the steering assy with corrector.
3. If engine does not start after ICU replacement, check part number (01MY).
Proper parts Numbers are following.
Gas Engine 897228-184X
Suffix number
Diesel Engine 897228-183X
Suffix number