Isuzu D-Max / Isuzu Rodeo (TFR/TFS). Manual

Immobilizer Control Unit (ICU) : Connector Pin Assignment

(4JA1-TC 2.5L/4JH1-TC 3.0L)

A-1

Antenna coil positive

A-2 N.C

A-3

Antenna coil negative

B-1 Starter

relay

B-2 Ground

B-3

Voltage from ignition switch ON

B-4

Back up Voltage supply

B-5 To

Tech-2

B-6 N.C

B-7

Communication: carry on line from ECM to immobilizer (Check Engine Lamp)

B-8

Communication: carry on line from immobilizer to ECM

B6 B5

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.

Notes:

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.

lmportant information on Programming

Security code

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 Engine Control Module (ECM). (ECM : Gasoline Engine only)

New ECM is 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

ECM 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 enclosed 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 that the
l security code
l mechanical key number
l Vehicle Identification No.

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.

Isuzu D-Max / Isuzu Rodeo (TFR/TFS). Manual - part 270