steering DAEWOO MATIZ 2003 Service Repair Manual

IMMOBILIZER ANTI-THEFT SYSTEM 9T–27
DAEWOO M–150 BL2
6. Turn the ignition OFF and ON again, but do not
crank or start the engine. The ECM will reset the
ECM ID code to match the new ID code that was
calculated and sent by the immobilizer control unit
when the ignition was first turned ON after the reset
command.
7. Return the system to the normal mode.
8. Turn OFF the ignition.
9. Turn ON the ignition.
10. Start the engine.
After reprogramming the ID code, the scan tool SYS-
TEM DIAGNOSIS command can verify that the ECM ID
code matches the immobilizer control unit ID code.
If the reprogramming procedure does not result in
matching ID codes, check the electrical connectors for
the serial data wire between the immobilizer control unit
and the ECM.
TRANSPONDER
Each valid ignition key has an internal transponder
which is a read /write transponder.
The transponder contains an implementation of a cryp-
to-algorithm with 96 bits of user configurable secret-key
contained in EEPROM and transmits data to the ICU by
modulating the amplitude of the electromagnetic field,
and receives data and commands in a similar way.
D105A504
DETECTION COIL
(Left–Hand Drive Shown, Right–Hand
Drive Similar)
Removal Procedure
1. Remove the steering column covers. Refer to Section
6E, Steering Wheel and Column.
D29T001
2. Remove the detection coil.

Disconnect the two-pin connector from the detec-
tion coil (1).

Pry the detection coil away from the lock cylinder
(2).
Important: If the detection coil will be replaced with a
new one, it does not matter if the key position trim ring is
damaged during removal. A new trim ring is part of the
new detection coil.

9T–28 IMMOBILIZER ANTI-THEFT SYSTEM
DAEWOO M–150 BL2
D29T002
Installation Procedure
1. Install the detection coil by pressing it onto the lock
cylinder until it snaps in place.
2. Connect the two-pin connector to the immobilizer.
D105A505
3. Install the steering column covers with the screws.
Refer to Section 6E, Steering Wheel and Column.
D105A504
IMMOBILIZER CONTROL UNIT
(Left–Hand Drive Shown, Right–Hand
Drive Similar)
Removal Procedure
1. Disconnect the negative battery cable.
2. Remove the steering column covers. Refer to Section
6E, Steering Wheel and Column.
D29T003
3. Slide the immobilizer control unit toward steering
wheel until it slides off its mounting bracket.
4. Disconnect the electrical connectors from the immo-
bilizer control unit (1).

IMMOBILIZER ANTI-THEFT SYSTEM 9T–29
DAEWOO M–150 BL2
D29T004
Installation Procedure
After replacing the immobilizer control unit, the keys
must be re-authorized using the key coding procedure.
Refer to “Key Coding Procedure” in this section. Also,
the electronic control module (ECM) identification (ID)
code must be reset. Refer to “Identification (ID) Code
Reprogramming” in this section.
1. Connect the electrical connectors to the immobilizer
control unit.
2. Slide the immobilizer control unit onto its mounting
bracket.
D105A505
3. Install the steering column covers. Refer to Section
6E, Steering Wheel and Column.
4. Connect the negative battery cable.