lock DAEWOO MATIZ 2003 Service Repair Manual

9T–18 IMMOBILIZER ANTI-THEFT SYSTEM
DAEWOO M–150 BL2
D19T002B
DIAGNOSTIC TROUBLE CODE (DTC) 1602
ECM IMMOBILIZER ERROR (ECM LOCKED)
Circuit Description
When the ignition is turned ON, the key is tested by the
immobilizer anti-theft system. While the key code is be-
ing read by the immobilizer control unit, the engine can
start and run with any key that will turn the lock cylinder.
The key code is read and compared with key codes that
have been stored in the memory of the immobilizer con-
trol unit. If a valid key is detected, the immobilizer control
unit sends a serial data release message to the elec-
tronic control module (ECM). Included in the release
message is an identification (ID) code which assures
that neither the immobilizer control unit nor the ECM has
been substituted to defeat the system. If the ECM re-ceives an invalid release message, the ECM performs
the following actions:

Disables the fuel injector circuit.

Disables the fuel pump circuit.

Disables the ignition coil.
DTC 1602 Will Set When

The immobilizer control unit does not learn and store
the codes of valid keys.
DTC 1602 Will Clear When

The ignition switch is turned OFF or the scan tool
TROUBLE CODE CLEAR command is issued.

IMMOBILIZER ANTI-THEFT SYSTEM 9T–19
DAEWOO M–150 BL2
DTC 1602 – ECM Immobilizer Error (ECM Locked)
StepActionValueYesNo
1
Connect the scan tool using the following procedure:
1. Insert the cartridge into the scan tool.
2. Turn the ignition switch to the OFF.
3. Connect the scan tool to the data link connector
(DLC).
4. Connect the scan tool’s power cord to the cigar
lighter socket.
5. Turn the ignition ON, but do not start the engine.
Is communication established between the scan tool
and the immobilizer control unit?
–
Go to Step 2
Go to
“Communi-
cation
Between
Immobilizer
and Test
Equipment”
2
1. Select CURRENT KEY STATUS from the scan
tool menu.
2. Read the STATUS OF CURRENT KEY message.
Does the KEY STATUS message indicate “KEY IS
WRONG”?
–
Go to “Key
Status Errors”
Go to Step 3
3
1. Select DIAGNOSIS from the scan tool menu.
2. Read the IMMO & ECM ID CODE (immobilization
and electronic control module identification code)
message.
Did the message differ from normal message?
Normal Message –ECM MODE: LEARNT
IMMO. MODE: LEARNT
VIN CODE: SAME
–Go to
“Identification
(ID) Code
Repro-
gramming”
Go to Step 4
4
Check for an open serial data wire between the
immobilizer control unit and the electronic control
module (ECM).
Was the circuit open?
–
Go to Step 5Go to Step 6
5
Repair the open serial data wire between the ECM
and the immobilizer control unit.
Is the repair complete?
–
System OK
–
6
1. Replace the ECM.
2. Reprogram the ID code.
Is the repair complete?
–
System OK
–

9T–20 IMMOBILIZER ANTI-THEFT SYSTEM
DAEWOO M–150 BL2
D209T002
DIAGNOSTIC TROUBLE CODE (P) 1628 (SIRIUS D3)
ECM IMMOBILIZER ERROR (NO SUCCESSFUL COMMUNICATION)
Circuit Description
When the ignition is turned ON, the key is tested by the
immobilizer anti-theft system. While the key code is be-
ing read by the immobilizer control unit, the engine can
start and run with any key that will turn the lock cylinder.
The key code is read and compared with key codes that
have been stored in the memory of the immobilizer con-
trol unit. If a valid key is detected, the immobilizer control
unit sends a serial data release message to the elec-
tronic control module (ECM). Included in the release
message is an identification (ID) code which assures
that neither the immobilizer control unit nor the ECM has
been substituted to defeat the system. If the ECM re-ceives an invalid release message, the ECM performs
the following actions:

Disables the fuel injector circuit.
P 1628 Will Set When

The ECM does not receive the signal from the immo-
bilizer control module within 1.260 seconds after the
ignition is turned on.

The above conditions are maintained until the ignition
is switched OFF.
P 1628 Will Clear When

The ignition switch is turned OFF or the scan tool
TROUBLE CODE CLEAR command is issued.

9T–22 IMMOBILIZER ANTI-THEFT SYSTEM
DAEWOO M–150 BL2
D209T002
DIAGNOSTIC TROUBLE CODE (P) 1629 (SIRIUS D3)
ECM IMMOBILIZER ERROR (INCORRECT ANSWER)
Circuit Description
When the ignition is turned ON, the key is tested by the
immobilizer anti-theft system. While the key code is be-
ing read by the immobilizer control unit, the engine can
start and run with any key that will turn the lock cylinder.
The key code is read and compared with key codes that
have been stored in the memory of the immobilizer con-
trol unit. If a valid key is detected, the immobilizer control
unit sends a serial data release message to the elec-
tronic control module (ECM). Included in the release
message is an identification (ID) code which assures
that neither the immobilizer control unit nor the ECM hasbeen substituted to defeat the system. If the ECM re-
ceives an invalid release message, the ECM performs
the following actions:

Disables the fuel injector circuit.
P 1629 Will Set When

The ECM receives an incorrect release message
from the immobilizer control unit more than five times.
P 1629 Will Clear When

The ignition switch is turned OFF or the scan tool
TROUBLE CODE CLEAR command is issued.

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).