ECO mode DAEWOO MATIZ 2003 Service User Guide

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–18 MANUAL CONTROL HEATING, VENTILATION, AND AIR CONDITIONING SYSTEM
DAEWOO M-150 BL2
D108B501
A/C PUSH KNOB
(Left–Hand Drive Shown, Right–Hand
Drive Similar)
Removal Procedure
1. Remove the instrument cluster housing trim panel.
Refer to Section 9E, Instrumentation/Driver Informa-
tion.
2. Remove the A/C push knob.
Disconnect the temperature control cable from the
heater module (1).
Disconnect the mode control cable from the heater
module (2).
D108B502
Remove the control assembly retaining screws (3).
Pull out the control assembly.
Remove the A/C push knob by pushing the knob
lock (4).
Disconnect the A/C push knob electrical connector
(5).
D108A506
Installation Procedure
1. Install the A/C push knob to the control assembly.
2. Connect the A/C push knob electrical connector.
3. Install the control assembly with the screws.
4. Connect the mode control cable to the heater mod-
ule.
5. Connect the temperature control cable to the heater
module.
6. Install the instrument cluster housing trim panel. Re-
fer to Section 9E, Instrumentation / Driver Informa-
tion.
D18B503A
RECEIVER DRYER AND DUAL CUT
SWITCH
Removal Procedure
1. Recover the refrigerant. Refer to “Discharging, Add-
ing Oil, Evaculating, and Charging Procedures for
A/C System” in this section.
2. Remove the front bumper fascia. Refer to Section
9O, Bumpers and Fascias.
3. Remove the receiver dryer.
Disconnect the dual cut switch connector (1).
Remove the receiver dryer flange nuts (2).
Remove the bracket bolt (3).
Discard the O–ring (4).

9T–2 REMOTE KEYLESS ENTRY AND ANTI-THEFT SYSTEM
DAEWOO M-150 BL2
DESCRIPTION AND OPERATION
REMOTE KEYLESS ENTRY AND
ANTI-THEFT SYSTEM
The remote keyless entry and anti-theft system can per-
form the following functions:

Remotely lock and unlock the vehicle doors with a
hand-held high-frequency transmitter.

Sense intrusion into the vehicle through the doors,
the tailgate, or the hood.

Activate a warning to signal an intrusion.

Help the driver find the vehicle in a parking area.

Automatically re-lock the doors if a door or the trunk is
not opened within 30 seconds after the vehicle has
been unlocked by the remote keyless entry.

Communicate serial data to a scan tool to help diag-
nose system faults.
The remote keyless entry and anti-theft system consists
of the following components:

Keyless entry and anti-theft control module/receiver.

Security indicator.

Tailgate open switch.

Door open switches.

Central locking unit.

Flashing turn signal lamps.

Siren.

Hood open switch.
REMOTE LOCKING AND UNLOCKING
The hand-held transmitter locks and unlocks the vehicle
doors by sending radio waves to the control module/re-
ceiver in the vehicle. The effective range of the transmit-
ter varies between 5 and 10 meters (approximately 16 to
32 feet), depending on whether or not objects such as
other vehicles are blocking the path of the radio waves.
The transmitter has a LOCK button and an UNLOCK
button which only function when the ignition is OFF.
Pressing the UNLOCK button has the following effects:

The doors are unlocked.

The turn signal lamps flash twice.

The control module is disarmed.
Pressing the LOCK button has the following effects:

The doors are locked.

The turn signal lamps flash once.

The control module is armed.
The transmitter has a replaceable battery. The battery is
designed to last at least two years before replacement is
necessary.
SECURITY INDICATOR
There is a security indicator on the instrument panel. Af-
ter the LOCK button of the transmitter is pressed, the
module is placed in the armed mode, and the security
indicator flashes. The security indicator turns ON for 1/8
second and OFF for 7/8 second. It then flashes at that
frequency until the control module/receiver is disarmed.
INTRUSION SENSING
The anti-theft function is armed if the transmitter sends
the LOCK message to the control module/receiver when
the ignition is OFF.
When the hood, the door, or the tailgate is opened, the
hood open switch, the door open switch, or the tailgate
open switch will change its input to ground. The alarm
will be activated if the hood open sensor, the door open
sensor, or the tailgate open sensor changes its input to
ground before either of the following conditions occurs:

An UNLOCK message is received from the transmit-
ter.
SIREN
The remote keyless entry system is armed when the
LOCK message is received from the transmitter when
the ignition is OFF. When the system is armed, it will ac-
tivate the siren and flash the turn signals for 28 seconds
if any of the following conditions occurs:

A door is opened (front door open switch input is
changed to ground).

The tailgate is opened (tailgate open switch input is
changed to ground).

The hood is opened while the anti-theft system is
armed (hood open switch input is changed to
ground).
The siren is disarmed when any of the following condi-
tions occurs:

The ignition switch is turned ON with the key.

The UNLOCK button or the LOCK button on the re-
mote transmitter is pressed.
VEHICLE LOCATOR
The remote keyless entry system assists the driver in lo-
cating the vehicle. When the vehicle is unlocked with the
remote control, the turn signals flash twice to indicate
the location of the vehicle. The duration of the flashes
and the length of time between flashes is used to indi-
cate certain vehicle conditions. Refer to “Fault or Alarm
Indication” in this section.

REMOTE KEYLESS ENTRY AND ANTI-THEFT SYSTEM 9T–3
DAEWOO M-150 BL2
AUTOLOCKING (SAFETY LOCK)
The remote keyless entry system features an autolock-
ing control. If the doors are unlocked with the remote
transmitter when the control module/receiver is in the
armed mode, the doors are automatically re-locked after
30 seconds unless any of the following events occur:

The door is opened.

The ignition switch is turned ON.

The tailgate is opened.

The hood is opened.
CONTROL MODULE/RECEIVER
The remote keyless entry control module/receiver is
contained in the tie-bar center. The module/receiver pro-
cesses signals from the remote transmitter and the in-
trusion sensors, and it activates the alarm if an intrusion
is detected.
The control module/receiver will not communicate with
transmitters from other vehicles because there are over
four billion possible electronic password combinations,
and passwords are not duplicated. The control module/
receiver has an attached antenna to detect signals from
the transmitter.

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.

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.

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
–

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–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.