2003 DAEWOO MATIZ oil change

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.

7B–14 MANUAL CONTROL HEATING, VENTILATION, AND AIR CONDITIONING SYSTEM
DAEWOO M-150 BL2
MAINTAINING CHEMICAL STABILITY
IN THE REFRIGERATION SYSTEM
The efficient operation and life of the air conditioning
system is dependent upon the chemical stability of the
refrigeration system. When foreign materials, such as
dirt, air, or moisture, contaminate the refrigeration sys-
tem, they will change the stability of the refrigerant and
the PAG compressor oil. They will also affect the pres-
sure-temperature relationship, reduce efficient opera-
tion, and can possibly cause interior corrosion and
abnormal wear of moving parts.
Observe the following practices to ensure chemical sta-
bility in the system:
Wipe away dirt or oil at and near any connection be-
fore opening that connection. This will reduce the
chance of dirt entering the system.
Cap, plug, or tape both sides of a connection as soon
as possible after opening the connection. This will
prevent the entry of dirt, foreign material, and mois-
ture.
Keep all tools clean and dry, including the manifold
gauge set and all replacement parts.
Use a clean and dry transfer device and container to
add PAG refrigerant oil. This will ensure that the oil
remains as moisture-free as possible. Refer to “Dis-
charging, Adding Oil, Evacuating and Charging Pro-
cedures for A/C System” in this section.
Have everything you need ready to allow you to per-
form all operations quickly when opening an A/C sys-
tem. Do not leave the A/C system open any longer
than necessary.
Evacuate and recharge any A/C system that has
been opened. Refer to “Discharging, Adding Oil, Eva-
cuating and Charging Procedures for A/C System” in
this section for the instructions to perform this proce-
dure properly.
All service parts are dehydrated and sealed before ship-
ping. They should remain sealed until just before making
connections. All the parts should be at room tempera-
ture before uncapping. This prevents condensation of
moisture from the air from entering the system. Reseal
all parts as soon as possible if the caps have been re-
moved but the connections cannot be made promptly.
DISCHARGING, ADDING OIL,
EVACUATING, AND CHARGING
PROCEDURES FOR A/C SYSTEMS
Caution: Use only refillable refrigerant tanks that
are authorized for the charging station being used.
The use of other tanks may cause personal injury or
void the warranty. Refer to the manufacturer’s in-
structions for the charging station.Caution: To avoid personal injury, always wear
goggles and gloves when performing work that in-
volves opening the refrigeration system.
A charging station discharges, evacuates, and re-
charges an air conditioning system with one hook-up.
Filtering during the recovery cycle together with filtering
during the evacuation cycle ensures a supply of clean,
dry refrigerant for A/C system charging.
Notice:
Never use the R-134a charging station on a system
charged with R-12. The refrigerants and the oils are
not compatible and must never be mixed in even the
smallest amount. Mixing refrigerant residue will dam-
age the equipment.
Never use adapters which convert from one size fit-
ting to another. This will allow contamination which
may cause system failure.
Charging Station Setup and Maintenance
Refer to the manufacturer’s instructions for all initial set-
up procedures and all maintenance procedures. There
are many charging stations available. All perform the
various tasks required to discharge the system and re-
cover refrigerant, evacuate the system, add a measured
amount of oil, and recharge an air conditioning system
with a measured amount of refrigerant.
Control Panel Functions
A charging station will have controls and indicators to al-
low the operator to control and monitor the operation in
progress. Refer to the manufacturer’s instructions for
details. These can be expected to include:
1. Main Power Switch: The main power switch supplies
electrical power to the control panel.
2. Display: The display shows the time programmed for
vacuum and the weight of the refrigerant pro-
grammed for recharging. Refer to the manufacturer’s
instructions for detailed programming information.
3. Low Side Manifold Gauge: This gauge shows the
system’s low side pressure.
4. High Side Manifold Gauge: This gauge shows the
system’s high side pressure.
5. Controls: This will contain the controls that control
various operating functions.
6. Low Side Valve: This valve connects the low side of
the A/C system to the unit.
7. Moisture Indicator: This indicator shows if the refrig-
erant is wet or dry.
8. High Side Valve: This valve connects the high side of
the A/C system to the unit.

MANUAL CONTROL HEATING, VENTILATION, AND AIR CONDITIONING SYSTEM 7B–15
DAEWOO M-150 BL2
Refrigerant Recovery
Important: Use only a refrigerant tank that is designed
for the charging station in use. The unit’s overfill limita-
tion mechanism is calibrated specifically for use with this
tank. The tank’s valves are also specifically for this unit.
1. Attach the high side hose with the quick disconnect
coupler to the high side fitting of the vehicle’s A/C
system.
2. Open the coupler valve after attachment.
3. Attach the low side hose with the quick disconnect
coupler to the low side fitting of the vehicle’s A/C
system.
4. Open the coupler valve after attachment.
5. Check the high side and the low side gauges on the
unit’s control panel in order to ensure that the A/C
system has pressure. If there is no pressure, there
is no refrigerant in the system to recover.
Important: If there is no refrigerant in the system, do
not continue with the recovery operation. This will draw
air into the recovery tank.
6. Open both the high side and the low side valves.
7. Open the gas and the liquid valves on the tank.
8. Drain any oil that may be in the oil separator.
9. Close the oil drain valve.
10. Plug the unit into the proper voltage outlet.
11. Turn on the main power switch.
Notice: Never reuse refrigerant oil. Damage to the A/C
system may result. Dispose of the refrigerant oil proper-
ly.
12. Begin the recovery process. Refer to the manufac-
turer’s instructions for the charging station in use.
Important: Some A/C system PAG lubricating oil may
be removed with the refrigerant during recovery. The
amount of oil removed varies. A charging station sepa-
rates the oil from the refrigerant and allows a means of
determining how much oil was removed. Replace the
same amount of oil when you recharge the system. Re-
fer to the manufacturer’s instructions for the charging
station in use.
13. Wait 5 minutes. Check the control panel low side
gauge. If the A/C has maintained vacuum, the re-
covery is complete.
14. There is more refrigerant in the system if the low
side gauge pressure rises above zero. Recover the
additional refrigerant. Repeat this step until the sys-
tem maintains vacuum for two minutes.
Important: If the control indicator shows that the refrig-
erant tank is full during the recovery process and the unit
shuts off, install an empty unit tank to store the refriger-
ant needed for steps later in the procedure. Do not use
any other type of tank.
Evacuation
The unit tank must contain a sufficient amount of R-134a
refrigerant for charging. Check the amount of refrigerant
in the tank. If there is less than 3.6 kg (8 pounds) of re-
frigerant, add new refrigerant to the tank. Refer to the
manufacturer’s instructions for adding refrigerant.
1. Verify that the high side and the low side hoses are
connected to the A/C system. Open both the high
side and the low side valves on the unit’s control pan-
el.
2. Open both the gas and the liquid valves on the tank.
Important: Refer to the manufacturer’s instructions for
the charging station in use. It is necessary to evacuate
the system before recharging it with new or recycled re-
frigerant.
3. Start the vacuum pump and begin the evacuation
process. Non-condensable gases (mostly air) are au-
tomatically vented from the tank during the recycling
process. You may hear the pressure being released.
4. Check for leaks in the system. Refer to the manufac-
turer’s instructions for the charging station in use.
Important:
Change the vacuum pump oil frequently. Refer to the
manufacturer’s instructions for the charging station in
use.
A/C System Oil Charge Replenishing
Any oil removed from the A/C system during the recov-
ery process must be replenished at this time.
1. Use the correct graduated bottle of polyalkaline glycol
(PAG) oil for the R-134a system.
Important:
Keep the oil bottles tightly capped at all times to pro-
tect the oil from moisture and contamination.
Never open the oil injection valve while there is posi-
tive pressure in the A/C system. This will result in oil
blow-back through the bottle vent. You must have
A/C system vacuum for this operation.
Never let the oil level drop below the pick-up tube
while charging or replenishing the system. This will
allow air into the A/C system.
2. Refer to the manufacturer’s instructions for the charg-
ing station in use. Add the proper amount of PAG oil
to the system.
3. Close the valve when the required oil charge has
been pulled into the system.
Charging
Important: Evacuate the air conditioning system before
charging.
1. Close the low side valve on the control panel.
2. Open the high side valve on the control panel.

9F –2 AUDIO SYSTEMS
DAEWOO M-150 BL2
DESCRIPTION AND OPERATION
STEREO CASSETTE AM/FM RADIO
WITH CD CHANGER AND
RDS/AUDIO SECURITY SYSTEM
The stereo digital logic cassette AM/FM radio with elec-
tronic tape ejection and the stereo digital logic cassette
AM/FM radio with a CD changer located under the front
seat (LH) are optional equipment.
The radio data system (RDS) uses a single button to se-
lect a specific radio station once it is set to the listener’s
preference.
The audio security system is activated whenever the au-
dio system circuit is disconnected from the battery. A
four-digit security code must be entered in order for the
audio system to be functional once again. The security
code is stamped on a card located in the vehicle (usually
in the glove box). One of the following security code en-
tering procedures can be followed.
With RDS
1. With the ignition switch in the I or II position, turn the
radio ON. At this time, “CODE” will be shown on the
radio display.
2. Press the P-UP button until the correct first digit is
shown on the display.
3. Press the P-DN button to move over to the second
digit and then press P-UP once again to enter the cor-
rect second digit.
4. Use steps two and three to enter the third and fourth
digits using the same method.
5. After entering the correct four-digit security code,
press the TP button. “CODE OK” will briefly appear
on the radio display, and the system is ready for use.
Wrong Code
If the wrong code is entered, “ERROR 1” will appear on
the display. After this, “CODE” will appear once again,
and the correct security code can be entered. The timebetween each new coding attempt is doubled; a total of
ten coding attempts can be made.
FRONT AND REAR SPEAKERS
All audio systems use four speakers: two speakers
mounted in the front doors and two speakers mounted in
the rear parcel side shelf.
ROOF ANTENNA
Roof antenna is located on the roof and is designed to
separate the antenna pole from the antenna base. The
antenna pole should be removed to prevent the painting
damage before washing the vehicle. The roof antenna
cannot be adjusted.
TAPE PLAYER AND CASSETTE CARE
The head and the capstan are the two parts of the tape
player that should be cleaned. This service should be
performed every 100 hours of cassette operation.
In order to clean the head and the capstan, use a cotton
swab dipped in rubbing alcohol.
A cassette cleaning kit may also be used to clean the
head and the capstan. Follow the cleaning kit instruc-
tions to clean the tape player.
Do not touch the tape head with magnetized tools. If the
head becomes magnetized, it will degrade cassettes
played in the player. No service is performed on the cas-
settes. The cassette manufacturer handles warranties
of the cassettes. Store cassettes away from extreme
heat and direct sunlight.
COMPACT DISC CARE
Handle discs carefully. Store the discs in protective
cases away from the sun, heat, and dust. If the surface
is soiled, dampen a clean, soft cloth in a solution of mild
neutral detergent and wipe the disc clean. Mini discs
(about 3 inches in diameter), will not eject and should
not be used.

9T–10 IMMOBILIZER ANTI-THEFT SYSTEM
DAEWOO M–150 BL2
DESCRIPTION AND OPERATION
IMMOBILIZER SYSTEM
The purpose of the Immobilizer system is to provide
additional theft deterrence to the vehicle in which it is
installed and to prevent it from being stolen or driven by
unauthorized users.
The verification of the user authorization is done by an
ignition key with integrated transponder.
The external LED displays the Immobilizer status and
has an additional theft deterrence function.
To secure the communication, the status is exchanged
between the Immobilizer and the ECM in a 5 byte of en-
coded data.
These 5 bytes are composed by a mixture of random
data and two types of fixed code

a vehicle model identification number : MIN

a vehicle specific identification : VIN
The MIN is known from the first supply of the system.
The VIN is realized by ICU on the special order from the
key coding (reading of transponder code and storing it
as valid key code in Immobilizer EEPROM).
A different random data is computed at each key transi-
tion.
All the immobilization communication between the ECM
and ICU is made on K-line (K line : Serial data line ’7’).
Due to the learning of the Vehicle specific identification
Number, both ICU and ECM can stay in 3 stable modes

Virgin mode (VIN not learnt)

Learnt mode (VIN learnt)

Neutral mode (for a new VIN learning)
In case of using valid key, the release message commu-
nication with the ECM take place and the LED displays
the Immobilizer status valid key In case of using invalid
key, the ECM disables the fuel injector circuit with coded
intervention and sets DTC(Diagnostic Trouble Code)
The above conditions are maintained until the ignition is
switched off.
An ECM without an immobilizer control unit cannot be
interchanged for an ECM that is used with an immobiliz-
er control unit system. The Immobilizer control unit and
ECM must have a matching ID code. ID coding and key
coding are accomplished by using Scanner–100
The Immobilizer system consists of

a maximum or 5 ignition keys with integrated trans-
ponder

the toroidal coil (Detection coil) for energizing and
reading the transponder mounted at the ignition lock.

the Immobilizer control unit(ICU) with :
– power supply
– ignition input circuit
– transponder modulation and demodulation unit – EEPROM
– driver electronic for the external status LED
– serial data link hardware

the external status LED for displaying the Immobilizer
status

the serial data link between Immobilizer and ECM
ELECTRONICALLY CODED KEYS
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 s cret-key
contained in EEPROM and transmits data to the ICU by
modulating the amplitude of the ele tromagnetic field,
and receives data and commands in a similar way.
DETECTION COIL
The toroidal coil is mounted at the ignition lock in front of
the key barrel.
It is connected to the ICU with a four terminal connector
fixed at the body of the coil.
The length of the connection between coil and Immobi-
lizer is restricted to 50cm. The correct placement on the
ignition lock and the exact electrical data is very impor-
tant for the reading distance of transponder.
The toroidal coil and receiving coil inside the transpond-
er built a transformer. During the readingprocess the coil
induces energy into the transponder. The transponder
charges the field and generates an amplitude modulated
signal with the manchester coded data. This charge of
the field is demodulated inside the Immobilizer.
The Immobilizer contains the coil driver hardware for di-
rect connection of the toroidal coil.
IMMOBILIZER CONTROL UNIT
The function of the Immobilizer System is shared be-
tween the ICU and the ECM.
The task of the Immobilizer Electronic Control unit (ICU)
are:

Reading of the input information “ignition ON/OFF”

Controlling the states LED

Controlling the transponder read/write process (mod-
ulation, demodulation, decoding, comparison of the
read code with the code of the valid keys).

Communication with the ECM after ignition ON (re-
ceiving of the ECM-request and transmission of re-
lease message).

Special functions for calculation and handling of the
VIN-code.