2003 DAEWOO MATIZ ESP

MANUAL CONTROL HEATING, VENTILATION, AND AIR CONDITIONING SYSTEM 7B–7
DAEWOO M-150 BL2
LEAK TESTING THE REFRIGERANT
SYSTEM
Test for leaks whenever you suspect a refrigerant leak in
the system. You should also test for leaks whenever you
perform a service operation which results in disturbing
the lines or the connections. Leaks are commonly found
at the refrigerant fittings or at the connections. Leaks are
commonly caused by the following problems:
Improper torque.
Damaged O-ring seals.
Dirt or lint on the O-ring seals.
Liquid Leak Detectors
Use a liquid leak detector solution on locations such as
fittings. Apply the solution to the area in question with
the swab that is supplied with the solution. Look for
bubbles to appear. This will indicate the existence and
location of any leak.
For areas where this is not practical, such as sections of
the evaporator and the condenser, an electronic leak de-
tector is more useful.
Electronic Leak Detectors
Follow the manufacturer’s instructions for calibration,
operation, and maintenance of an electronic leak detec-
tor. Battery condition is especially important to the accu-
racy of a portable model. Set the detector to R-134a
before beginning the test.
Important: Electronic leak detectors are sensitive to
windshield washing solutions, solvents and cleaners,
and certain vehicle adhesives.
Surfaces must be clean to prevent false readings. Make
sure that all surfaces are dry to prevent damage to the
detector.
General Testing Instructions
Follow the entire path of the refrigerant system.
Completely circle each joint at 25 to 50 mm (1 to 2
inches) per second.
Hold the probe tip within 6 mm (1/4 inch) of the sur-
face.
Do not block the air intake.The audible tone changes from 1 to 2 clicks per second
into a solid alarm if there is a leak. Adjust the balance
control to maintain 1 to 2 clicks per second.
Test all of the following areas, even after one leak has
been confirmed:
Evaporator inlet and outlet.
Receiver-drier inlet and outlet.
Condenser inlet and outlet.
Brazed and welded areas.
Damaged areas.
Hose couplings.
Compressor rear head.
All fittings and joints.
Testing Service Ports/Access Valves
The sealing cap is the primary seal for the service ports.
This cap contains a special leak-free O-ring. Make sure
that this cap is not missing or loose. Always use the cor-
rect cap.
Testing the Evaporator Core
Leaks in the evaporator core are difficult to find. Test the
evaporator core using the following procedure:
1. Run the blower fan at speed setting 4 for at least
15 minutes.
2. Turn the blower to the OFF position.
3. Wait for 10 minutes.
4. Remove the blower motor resistor. Refer to “Blower
Motor Resistor” in this section.
5. Insert the leak detector probe as close as possible to
the evaporator core. The detector will indicate a leak
with a solid alarm.
6. Use a flashlight to search for refrigerant oil in the core
surface.
Testing the Compressor Shaft Seal
1. Blow shop air behind and in front of the compressor
clutch/pulley for at least 15 seconds.
2. Wait 1 to 2 minutes.
3. Probe the area in front of the pulley. If the detector
emits a solid alarm, there is a leak.

9P – 2 DOORS
DAEWOO M-150 BL2
DESCRIPTION AND OPERATION
DOOR LOCK STRIKER
The front and the rear door lock strikers each consist of
a striker with two screws threaded into a floating cage
plate in the B-pillars and C-pillars. The door is secured in
the closed position when the door lock fork snaps over
and engages the striker.
CHILDPROOF REAR DOOR LOCK
The childproof rear door locks help prevent passengers,
especially children, from opening the rear doors of the
vehicle from the inside.
In order to activate these locks, move the levers of both
rear doors to the lock position. Then, close both doors.
Rear passengers will be unable to open the doors from
the inside of the vehicle.
In order to deactivate the childproof rear door lock, un-
lock the door from the inside of the vehicle and open the
door from the outside. Move the lever to the unlock posi-
tion. The rear door will now work normally.
POWER DOOR LOCKS
The power door locks use a solenoid that is contained in
each door lock assembly. The door locks are activatedby the actuator on the inside door handle or by the lock
cylinder on the driver door only. When the driver door is
locked or unlocked by the actuator or lock cylinder, all
doors are locked or unlocked accordingly.
POWER WINDOWS
The power windows are controlled by electrical switches
on the front door tirm and operated by a motor at each
window regulator. The windows are lowered by pressing
the switch and raised by pulling up on the switch. The
window will stop movement when the switch is released
or when the window is completely open or closed.
TAILGATE STRUT
This vehicle is equipped with the gas struts. The struts
support the tailgate suitably when opening the tailgate.
The strut contained the high pressure compressed gas.
Therefore, be careful not to take apart, puncture, apply
heat or fire bacause the strut may explode.

REMOTE KEYLESS ENTRY AND ANTI-THEFT SYSTEM 9T–5
DAEWOO M-150 BL2
PASSWORD PROGRAMMING
If a transmitter is lost or damaged, the control module/
receiver must be re-programmed to communicate with a
new transmitter. The passwords recorded in the control
module/receiver should not be deleted when power is off
in the control module/receiver.
Each control module/receiver should be able to record
five passwords. The following method is used to record
new passwords in the control module/receiver:
1. Connect the scan tool to the data link connector
(DLC) connector.
2. Send the programming mode message to the control
module/receiver.
3. Press any button of the transmitter to generate a data
code including a password which will be recorded by
the control module/receiver. The control module/re-
ceiver sends a response message to the scan tool to
indicate that the first password has been recorded.
4. Press any button of the transmitter three more times
until the control module/receiver has responded that
the third, fourth, and fifth passwords have been re-
corded.
5. Disconnect the scan tool.
The control module/receiver leaves the programming
mode automatically and switches to the normal operat-
ing mode when either of the following conditions occurs:

The scan tool is disconnected from the DLC.

Five passwords are recorded in the control module/
receiver.

IMMOBILIZER ANTI-THEFT SYSTEM 9T–11
DAEWOO M–150 BL2
The VIN code is calculated by the Immobilizer using a
random generator.
The VIN code is transmitted from the Immobilizer in the
release message communication only incase of using
an authorized key. Without an authorized key it is not
possible to getthe system VIN code.In case of ECM in-
ternal state is in Virgin mode or neutral mode the ECM
learns the system VIN code automatically after receiving
the first release response message.
To get a synchronized Immobilizer system (same VIN-
code in Immobilizer and ECM,authorized key) the DLC
test equipment has to be used for authorization of the
keys(first key coding). The usage of this test equipment
is restricted to authorized persons.

Communication with the DLC-test equipment. Main
functions are the key coding procedure, the VIN-code
handling and the support for system test functions.

Handling of the software watchdog
Operation
In the active mode of immobilizer (engine OFF, IG key
OFF) the status LED is blinking as mode A. When igni-
tion is turned ON, the system wakes up and tries to read
out the transponder.
In case of the detection of a valid key , The release mes-
sage communication with the ECM takes place. The sta-
tus LED displays the Immobilizer state “valid key”.
After turning off the ignition(ignition OFF detection simi-
lar to the ECM ignition OFF detection), the Immobilizer
changes to the active mode. The status LED is blinking
as Mode A.
Data Link Connector (DLC) Mode
When the ignition is on, a scan tool can switch the immo-
bilizer control unit to the DLC mode for diagnostics, key
coding and ID coding.

The status LED is turned off during DLC-mode

The Immobilizer will answer all correct messages,
which are defined as Immobilizer messages.
ID Code Handling
One of 65,535 VIN codes is stored in the immobilizer
EEPROM.
The VIN code can be erased by using “Reset VIN code”
command of the scan tool.
When the immobilizer control unit calculates a new VIN
code, ECM VIN code should be reset to get identical
with the immobilizer control unit’s.
During diagnostic procedures, the VIN code can be read
for comparison with the ECM VIN code by using the
scan tool’s “Read immobilizer control unit VIN code”
command.
SERIAL DATA LINK
Serial data can be exchanged between a scan tool and
the ECM and the Immobilizer control unit. The scan tool
connection is the data link connector (DLC).
ELECTRONIC CONTROL MOUDLE
(ECM)

ECM in Virgin mode
In this mode, the ECM knows only the model vehicle
identifier code.
The engine can be locked/unlocked.
ECM requests to ICU the VIN number. As soon as the
ECM receives two correct consecutive communica-
tion frames with the same VIN code the ECM learns
it.
The VIN code will be stored in non-volatile memory at
the end of power latch phase. ECM enters in Learnt
mode.

ECM in Learnt mode
In such a state, ECM checks on every communica-
tion, the correct encoding of the ICU.
If the code received is not correct, then the vehicle is
immobilized.
The coded 5 bytes of data emitted by ECM are a mix-
ture of MIN code and random.
The coded 5 bytes of data emitted by ICU are a mix-
ture of VIN code and random.

ECM in Neutral mode
This mode is a special intermediate mode, used for
ICU replacement or immobilizer option installation.
ECM request to ICU the VIN number. As soon as the
ECM receives two correct consecutive communica-
tion frames with the same VIN code the ECM learns
it. The VIN code will be stored in non-volatile memory
at the end of power latch phase. ECM enters in
Learnt mode.

After turning on the ignition the ECM will control the
engine in a normal way for starting and running while
waiting for a valid release response message from
the Immobilizer.
1. After receiving a response message including the in-
formation “ICU in learnt mode” and the correct sys-
tem VIN-code
→ the ECM enters the release state, which allows to
continue the running of the engine.
2. After receiving a response message including the in-
formation “ICU in learnt mode” and a wrong system
VIN-code
→ the ECM does not send a new request and enters
the blocked state, which causes the activation of the
immobilization actions of the engine.

9T–12 IMMOBILIZER ANTI-THEFT SYSTEM
DAEWOO M–150 BL2
3. If the ECM doesn’t receive a response message with-
in a defined time from beginning of the release time
period or the ECM receives a no release answer
→ the ECM enters the blocked state, which causes the
activation of the immobilization actions of the engine.

The inactive state of the Immobilizer (valid key/invalid
key) ends with turning off the ignition.
SECURITY INDICATOR
There is a security indicator on the instrument panel.
Status LED
An external LED displays the immobilizer system status.
The immobilizer contains the LED driver hardware for di-
rect connection of one LED.
Status LED Modes
Status
LEDImmobilizer
System StatusNote
BlinkingActive– Ignition OFF
BlinkingActive– Invalid key
detected
– Ignition ON
OFFInactive– Valid key detected
– Ignition ON
BlinkingActive– VIN-code is
different between
ICU and ECM in
learnt state
– Ignition ON
ONActive– Transponder
reading error
– Ignition ON
BlinkingActive– Reader exciter
ASIC error
– Ignition OFF