2004 DAEWOO NUBIRA heating

AUTOMATIC TEMPERATURE CONTROL HEATING, VENTILATION, AND AIR CONDITIONING SYSTEM 7D – 15
DAEWOO V–121 BL4
StepNo Yes Value(s) Action
8Repair or replace the terminal.
Is the repair complete?–System OK–
9Replace the controller.
Is the repair complete?–System OK–
Motor Control Table
Mode SettingMode Motor
Connector Terminal
Controller/
MotorController/
MotorController/
MotorController/
MotorController/
Motor
B16/3B17/2B18/1B19/7B20/6
Vent11–14 v11–14 v11–14 v11–14 v0 v
Bi–Level11–14 v11–14 v11–14 v0 v11–14 v
Foot11–14 v11–14 v0 v11–14 v11–14 v
Foot/Defrost11–14 v0 v11–14 v11–14 v11–14 v
Defrost0 v11–14 v11–14 v11–14 v11–14 v

7D – 16IAUTOMATIC TEMPERATURE CONTROL HEATING, VENTILATION, AND AIR CONDITIONING SYSTEM
DAEWOO V–121 BL4
AIR SOURCE SELECTION NOT CONTROLLED
Refer to ”A/C Blower and Motor Controls Diagram” for the electrical schematic diagram of the circuits described in this
procedure.
Air Source Selection Not Controlled
StepActionValue(s)YesNo
1Measure the voltage at terminal 4 of the intake mo-
tor.
Is the voltage within the value specified?11–14 vGo to Step 3Go to Step 2
21. Check the connector and circuit (Brown) for
any wiring or terminal problems.
2. Repair any problems found.
Is the repair complete?–System OK–
31. Using the Intake Motor Table, measure the
voltages between terminal 4 and terminal 5 of
the motor connector.
2. Change the intake setting and observe the volt-
age changes.
Are these voltages within the specified value?See the ”Intake
Motor Table”Go to Step 4Go to Step 5
4Replace the intake motor.
Is the repair complete?–System OK–
51. Using the Intake Motor Table, measure the
voltages between terminal 4 and terminal 7 of
the motor connector.
2. Change the intake setting and observe the volt-
age changes.
Are these voltages within the specified value?See the ”Intake
Motor Table”Go to Step 6Go to Step 7
61. Check the wiring harness and connectors be-
tween the controller and the motor that is not
performing properly.
2. Repair or replace the wiring harness or the de-
fective terminal.
Is the repair complete?–System OK–
7Check the connector at the controller.
Is there a defective terminal?–Go to Step 8Go to Step 9
8Repair or replace the terminal.
Is the repair complete?–System OK–
9Replace the controller.
Is the repair complete?–System OK–
Intake Control Table
Intake SettingIntake Motor
Connector Terminal
Controller/MotorController/Motor
B14/7B13/5
Recirculate11–14 v0 v
Fresh0 v11–14 v

AUTOMATIC TEMPERATURE CONTROL HEATING, VENTILATION, AND AIR CONDITIONING SYSTEM 7D – 17
DAEWOO V–121 BL4
COMPRESSOR MAGNETIC CLUTCH DOES NOT ENGAGE
StepActionValue(s)YesNo
11. Remove the ATC Controller from the instru-
ment panel, keeping the wiring harness con-
nected.
2. Turn the ignition switch to ON.
3. Turn the A/C switch to ON.
4. Check the voltage between ground and termi-
nal A11 on the controller.
Is the voltage within the specified value?11–14 vGo to ”Insuffi-
cient Cooling
Diagnosis”Go to Step 2
2Replace the ATC controller.
Is the repair complete?–System OK–

7D – 18IAUTOMATIC TEMPERATURE CONTROL HEATING, VENTILATION, AND AIR CONDITIONING SYSTEM
DAEWOO V–121 BL4
DIAGNOSTIC TROUBLE CODES
CODE 1 – IN–CAR SENSOR ERROR
This code will set if the output of the in–car sensor indicates a probable short circuit or an open in the sensor or the associat-
ed wiring harness, or a malfunction of the ATC controller.
Code 1 – In–Car Sensor Error
StepActionValue(s)YesNo
11. Disconnect the in–car sensor connector from
the ATC controller.
2. Examine the wiring from the sensor to the con-
nector and the connector for any signs of dam-
age.
3. Measure the resistance between the in–car
sensor connector terminals.
Is there any sign of damage in the wiring or connec-
tor, or is the resistance outside the specified value
at 20 to 25°C (68 to 77°F)?2600–2100 ΩGo to Step 2Go to Step 3
2Repair the damaged wiring or the connector, or re-
place the in–car sensor as required.
Is the repair complete?–System OK–
31. Turn the ignition to ON.
2. Measure the voltage between the two connec-
tor terminals on the controller housing.
Is the voltage equal to the value specified?> 4 vGo to Step 7Go to Step 4
4Check the terminals on the in–car sensor connector.
Is any problem found with the connector?–Go to Step 5Go to Step 6
5Repair the connector terminals or replace the in–car
sensor or ATC controller as required.
Is the repair complete?–System OK–

AUTOMATIC TEMPERATURE CONTROL HEATING, VENTILATION, AND AIR CONDITIONING SYSTEM 7D – 19
DAEWOO V–121 BL4
StepNo Yes Value(s) Action
61. Reconnect the in–car sensor to the controller.
2. Turn the ignition switch to ON.
3. Observe the temperature display area.
Does this display indicate the continuing presence of
a code 1 condition?–Go to Step 7System OK
7Replace the ATC controller.
Is the repair complete?–System OK–

7D – 20IAUTOMATIC TEMPERATURE CONTROL HEATING, VENTILATION, AND AIR CONDITIONING SYSTEM
DAEWOO V–121 BL4
CODE 2 – AMBIENT AIR TEMPERATURE SENSOR
ERROR
This code will set if the output of the ambient air temperature sensor indicates a probable short circuit or an open in the
sensor or the associated wiring harness, or a malfunction of the ATC controller.
Code 2 – Ambient Air Temperature Sensor Error
StepActionValue(s)YesNo
11. Disconnect the ambient air sensor connector
from the front bumper harness.
2. Measure the resistance between the ambient
air sensor connector terminals.
Is the resistance equal to the specified value at 20
to 25°C (68 to 77°F)?2600–2100 ΩGo to Step 5Go to Step 2
21. Remove the ambient air sensor from behind
the front bumper.
2. Examine the wiring for any open or short and
examine the connector for any damage.
Is there a problem with the wiring or the connector?–Go to Step 3Go to Step 4
3Repair the problem found in the ambient air sensor
wiring or the connector.
Is the repair complete?–System OK–
4Replace the ambient air sensor.
Is the repair complete?–System OK–
51. Turn the ignition to ON.
2. Measure the voltage between the two terminals
in the ambient air sensor connector on the front
bumper harness.
Is the voltage equal to the value specified?> 4 vGo to Step 7Go to Step 6
61. Reconnect the in–car sensor to the controller.
2. Turn the ignition switch to ON.
3. Observe the temperature display area.
Does this display indicate the continuing presence of
a code 2 condition?–Go to Step 8System OK

AUTOMATIC TEMPERATURE CONTROL HEATING, VENTILATION, AND AIR CONDITIONING SYSTEM 7D – 21
DAEWOO V–121 BL4
StepNo Yes Value(s) Action
71. Pull the ATC controller from the instrument
panel, leaving the wiring harness connected.
2. Measure the voltage between terminals A13
and B8 by backprobing the connectors.
Is the voltage equal to the value specified?< 4 vGo to Step 8Go to Step 9
8Replace the ATC Controller.
Is the repair complete?–System OK–
91. Trace the wiring for the ambient air sensor from
the ATC controller, through connectors C209,
C208, C202 and C303 to the ambient air sen-
sor connector on the front bumper harness.
2. Repair any open or high resistance condition in
the wiring or a connector terminal.
Is the repair complete?–System OK–

7D – 22IAUTOMATIC TEMPERATURE CONTROL HEATING, VENTILATION, AND AIR CONDITIONING SYSTEM
DAEWOO V–121 BL4
CODE 3 – WATER SENSOR ERROR
This code will set if the output of the coolant sensor indicates a probable short circuit or an open in the sensor or the associ-
ated wiring harness, or a malfunction of the ATC controller.
Code 3 – Water Sensor Error
StepActionValue(s)YesNo
11. Disconnect the coolant temperature sensor
connector from the ATC harness.
2. Examine the wiring from the sensor to the con-
nector and examine the connector for any
signs of damage.
3. Measure the resistance between the coolant
temperature sensor connector terminals.
Is there any sign of damage in the wiring or the con-
nector, or is the resistance outside the specified val-
ue at 20 to 25°C (68 to 77°F)?2600–2100 ΩGo to Step 2Go to Step 3
2Repair the damaged wiring or the connector, or re-
place the coolant temperature sensor as required.
Is the repair complete?–System OK–
31. Turn the ignition to ON.
2. Measure the voltage between the two coolant
temperature sensor connector terminals on the
ATC harness.
Is the voltage equal to the specified value?< 4 vGo to Step 7Go to Step 4
4Check the terminals on the coolant temperature
sensor connector.
Is any problem found with the connector?–Go to Step 5Go to Step 6
5Repair the connector terminals or replace the cool-
ant temperature sensor or ATC controller as re-
quired.
Is the repair complete?–System OK–