2003 DAEWOO MATIZ engine

IMMOBILIZER ANTI-THEFT SYSTEM 9T–21
DAEWOO M–150 BL2
P 1628 – ECM Immobilizer Error (No Successful Communication)
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 position.
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. Select immobilizer mode on the scan tool.
6. 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
Read the IMMO & ECM ID CODE message that
was displayed after requesting DIAGNOSIS.
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 3
3
Check for an open serial data wire between the
immobilizer control unit and the ECM.
Was the circuit open?
–
Go to Step 4Go to Step 5
4
Repair the open serial data wire between the ECM
and the immobilizer control unit.
Is the repair complete?
–
System OK
–
5
1. Replace the immobilizer.
2. Reprogram the identification (ID) code. Refer to
“Identification (ID) Code Reprogramming” in this
section.
Is the repair complete?
–
System OK
–
Go to Step 6
6
1. Replace the ECM.
2. Turn the ignition ON, OFF for more than 4
seconds.
3. Turn the ignition ON.
Is the repair complete?
–
System OK
–

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–23
DAEWOO M–150 BL2
P 1629 – ECM Immobilizer Error (Incorrect Answer)
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 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 3
3
1. Replace the ECM.
2. Reprogram the ID code.
Is the repair complete?
–
System OK
–
Go to Step 4
4
1. Replace the ECM.
2. Turn the ignition ON, OFF for more than 4
seconds.
3. Turn the ignition ON.
Is the repair complete?
–
System OK
–

9T–24 IMMOBILIZER ANTI-THEFT SYSTEM
DAEWOO M–150 BL2
KEY STATUS ERRORS (FENIX 5MR)
The following KEY STATUS messages may be shown
on the scan tool after commanding FIRST KEY COD-
ING and KEY ADD:

IGNITION OFF STATUS. This message informs the
technician that the ignition is OFF during the key cod-
ing process. Turn the ignition ON during key coding,
but do not start the engine.

KEY IS OCCUPIED. Only five keys may be coded. If
a new key is desired, the previous key codes must be
deleted. Up to five keys may then be authorized.

ALREADY AUTHORIZED. Key coding is being at-
tempted with a key that is already authorized.

ERROR NO. A3, A4, A5. There is no communication
between the transponder in the ignition key and the
detection coil. Follow the steps below to diagnose the
problem:
1. Try a different key. If a different key works, the
problem is in the original key.
2. If trying a different key results in the same er-
ror message, replace the detection coil.

INVALID KEY. The communication between the im-
mobilizer control unit and the key transponder has not
validated the key. Follow the steps below to diagnose
the problem:
1. Code the key. Refer to “Key Coding Proce-
dure” in this section.
2. If the same message is received after key
coding, check the connection of the detection
coil.
3. If the detection coil is okay, replace the immo-
bilizer. Refer to “Immobilizer Control Unit” in
this section.

NO TRANSPONDER DETECTED. The fault may be
in ignition key transponder, the detection coil, or the
immobilizer. Follow the steps below to diagnose the
problem:
1. Try a different key. If a different key works, the
problem is in the original key.
2. If trying a different key results in the same er-
ror message, check the connection of the
detection coil.
3. If the connection of the detection coil is okay,
disconnect the detection coil and use an ohm-
meter to check for an open detection coil.
4. If the detection coil is not open, replace the
immobilizer control unit. Refer to “Immobilizer
Control Unit” in this section.
KEY STATUS ERRORS (SIRIUS D3)
The following KEY STATUS messages may be shown
on the scan tool after commanding FIRST KEY COD-
ING and KEY ADD:

IGNITION OFF STATUS. This message informs the
technician that the ignition is off during the key coding
process. Turn the ignition ON during key coding, but
do not start the engine.

KEY IS OCCUPIED. Only five keys may be coded. If
a new key is desired, the previous key codes must be
deleted. Up to five keys may then be authorized.

ALREADY AUTHORIZED. Key coding is being at-
tempted with a key that is already authorized.

ERROR NO. A3, A4, A5. There is no communication
between the transponder in the ignition key and the
detection coil. Follow the steps below to diagnose the
problem:
1. Try a different key. If a different key works, the
problem was in the original key.
2. If trying a different key resulted in the same error
message, replace the detection coil.

INVALID KEY. The communication between the im-
mobilizer control unit and the key transponder has not
validated the key. Follow the steps below to diagnose
the problem:
1. Code the key. Refer to “Key Coding Procedure” in
this section.
2. If the same message is received after key coding,
check the connection of the detection coil.
3. If the detection coil is okay, replace the immobiliz-
er. Refer to “Immobilizer Control Unit” in this sec-
tion.

NO TRANSPONDER DETECTED. The fault may be
in ignition key transponder, the detection coil, or the
Immobilizer. Follow the steps below to diagnose the
problem
1. Try a different key. If a different key works, the
problem was in the original key.
2. If trying a different key resulted in the same error
message, check the connection of the detection
coil.
3. If the connection of the detection coil is okay, dis-
connect the detection coil and use an ohmmeter to
check for an open detection coil.
4. If the detection coil was not open, replace the im-
mobilizer control unit. Refer to “Immobilizer Control
Unit” in this section.

9T–26 IMMOBILIZER ANTI-THEFT SYSTEM
DAEWOO M–150 BL2
REPAIR INSTRUCTIONS
ON-VEHICLE SERVICE
KEY CODING PROCEDURE
1. Install the immobilizer control unit cartridge in the
scan tool.
2. Turn the ignition OFF
3. Connect the scan tool.
4. Turn the ignition ON with the key to be coded.
5. Enter the four-digit password that enables service
personnel to use the scan tool for coding keys.
6. A lost key can be deleted only by deleting all keys
and reauthorizing the remaining keys as new keys.
If a key is lost, go to the next step. If no keys have
been lost but an additional key is desired, go to Step
8.
7. Use the scan tool command DELETE ALL KEY
CODES.
8. Use the scan tool command AUTHORIZE ONE
ADDITIONAL KEY.
9. Repeat Steps 4, 5, and 6 until the immobilizer con-
trol unit has recorded all of the new keys or, after a
deletion, has reauthorized all of the remaining keys.
The immobilizer control unit can record a maximum
of five keys.
10. Return the system to the normal mode.
11. Turn OFF the ignition.
12. Turn ON the ignition.
13. Crank to start the engine.
ID CODE REPROGRAMMING
Reprogram the identification (ID) code in the following
situations:

An immobilizer control unit has been replaced.

An electronic control module (ECM) has been re-
placed.
If a valid key has been lost, refer to “Key Coding Proce-
dure” in this section.
Reprogramming Procedure
1. Turn the ignition OFF. Reprogramming is not allowed
while the engine is running.
2. Insert the immobilizer control unit cartridge into the
scan tool.
3. Do not start the vehicle, but turn the ignition ON.
4. Enter the four-digit password that enables service
personnel to use the scan tool for ID code reprogram-
ming.
5. Use the scan tool to command RESET ID CODE.

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.