2003 DAEWOO MATIZ alarm

1F–242 ENGINE CONTROLS
DAEWOO M-150 BL2
MAA1F280
DIAGNOSTIC TROUBLE CODE (DTC) – P0501 VEHICLE SPEED NO SIGNAL
(M/T ONLY)
Circuit Description
Vehicle speed information is provided to the engine con-
trol module (ECM) by the voltage speed sensor (VSS) is
a permanent magnet generator that is mounted in the
transaxle and produces a pulsing voltage whenever ve-
hicle speed is over 3 mph (5km/h). The A/C voltage level
and the number of pulses increase with vehicle speed.
The ECM converts the pulsing voltage into mph (km/h)
and than supplies the necessary signal to the instrument
panel for speedometer / odometer operation and to the
cruise control module and multi-function alarm module
operation. The Diagnostic Trouble Code (DTC) will de-
tect if vehicle speed is reasonable according to engine
rpm and load.
Conditions for Setting the DTC

Vehicle speed is not change at least 10 seconds.

Engine speed is greater than 2,100rpm.

MAF is greater than 152mg/tdc.
Action taken when The DTCs Sets

The Malfunction Indicator Lamp (MIL) will illuminate.

The ECM will record operating conditions at the time
the diagnostic fails. This information will be stored in
the Freeze Frame and failure records buffers.

A history DTC is stored.Conditions for Clearing the MIL/DTC

The MIL will turn off after four consecutive ignition
cycles in which the diagnostic runs without a fault.

A history DTC will clear after 40 consecutive warm up
cycles without a fault.

Using the scan tool can clear DTC(s).
Diagnostic Aids
An Intermittent problem may be caused by a poor con-
nection, rubbed through wire insulation, or wire that is
broken inside the insulation.
VSS signal circuit should be thoroughly checked for the
following conditions

Backed-out terminals

Improper mating

Broken locks

Improperly formed

Damaged terminals

Poor terminals to wire connection

Physical damage to the wiring harness
Ensure the VSS is correctly torqued to the trnasaxle
housing.
Refer to “intermittents” in this Section.

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.

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.