2004 DAEWOO NUBIRA Service Repair Manual

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Page 2065 of 2643

DAEWOO NUBIRA 2004 Service Repair Manual 7D – 10IAUTOMATIC TEMPERATURE CONTROL HEATING, VENTILATION, AND AIR CONDITIONING SYSTEM
DAEWOO V–121 BL4
NO COOL AIR FROM BLOWER
StepActionValue(s)YesNo
11. Turn the ignition to ON.
2. Observe t

7D – 10IAUTOMATIC TEMPERATURE CONTROL HEATING, VENTILATION, AND AIR CONDITIONING SYSTEM
DAEWOO V–121 BL4
NO COOL AIR FROM BLOWER
StepActionValue(s)YesNo
11. Turn the ignition to ON.
2. Observe the temperature indication screen of
the controller.
Does the digit flash on and off?–Go to Step 2Go to Step 3
2Run a self–diagnosis circuit check.
Does the display indicate a defect code?–Go to the table
for the code
that flashes.Go to Step 7
3Observe the blower motor operation.
Is the blower motor functioning at all?–Go to Step 4Go to ”Blower
Motor Does
Not Run at All”
4Use the blower push switch to cycle the blower
through its different speeds.
Does the motor function at different speeds?–Go to Step 5Go to”Code 6 –
Power Transis-
tor Error”
51. Run the blower and operate the MODE push
switch manually.
2. Check for airflow out the various outlets.
Does the air flow from the different outlets as it
should?–Go to Step 7Go to Step 6
61. Remove the heater outlet and check for ob-
structions.
2. Remove any obstructions found.
Is the heater operating?–System OKGo to Step 9
7Observe the air mix door motor (AMD) while chang-
ing the temperature setting from 18 to 32°C (64 to
90°F) and then from 32 to 18°C (90 to 64°F).
Is the AMD motor functioning properly?–Go to Step 8Go to”Code 3 –
Air Mix Door
Error”
8Perform the checks found in ”Insufficient Cooling
Diagnosis.”
Is the system operating normally now?–System OKGo to Step 9
9Place the controller in the AUTO mode.
Is smoke taken into the intake port of the in–car sen-
sor?–Go to Step 12Go to Step 10
10Check the intake hose for the in–car sensor.
Is the hose in good condition?–Go to Step 12Go to Step 11
11Repair or replace the intake hose.
Is the repair complete?–System OK–
12Check the in–car sensor using the tests in ”Code 1
– In–Car Sensor Error.”
Is there a problem indicated in the sensor, the sensor
wiring, or the controller?–Go to Step 13Go to Step 14
13Repair or replace the sensor, the wiring, or the con-
troller as required.
Is the repair complete?–System OK–
14Check the ambient air temperature sensor using the
tests in ”Code 2 – Ambient Air Temperature Sensor
Error.”
Is there a problem indicated in the sensor, the sensor
wiring, or the controller?–Go to Step 15Go to Step 16

Page 2066 of 2643

DAEWOO NUBIRA 2004 Service Repair Manual AUTOMATIC TEMPERATURE CONTROL HEATING, VENTILATION, AND AIR CONDITIONING SYSTEM 7D – 11
DAEWOO V–121 BL4
StepNo Yes Value(s) Action
15Repair or replace the sensor, the wiring, or the con-
troller,

Page 2067 of 2643

DAEWOO NUBIRA 2004 Service Repair Manual 7D – 12IAUTOMATIC TEMPERATURE CONTROL HEATING, VENTILATION, AND AIR CONDITIONING SYSTEM
DAEWOO V–121 BL4
BLOWER MOTOR DOES NOT RUN AT ALL
StepActionValue(s)YesNo
11. Turn the ignition to ON.
2.

Page 2068 of 2643

DAEWOO NUBIRA 2004 Service Repair Manual AUTOMATIC TEMPERATURE CONTROL HEATING, VENTILATION, AND AIR CONDITIONING SYSTEM 7D – 13
DAEWOO V–121 BL4
StepNo Yes Value(s) Action
91. Turn the ignition switch to OFF.
2. Check circuit (Brown)

AUTOMATIC TEMPERATURE CONTROL HEATING, VENTILATION, AND AIR CONDITIONING SYSTEM 7D – 13
DAEWOO V–121 BL4
StepNo Yes Value(s) Action
91. Turn the ignition switch to OFF.
2. Check circuit (Brown) between terminal 86 of
the blower relay to F7 in the I/P fuse block.
3. Repair any problem found in the wiring or ter-
minals at the relay socket or connector C203.
Is the repair complete?–System OK–
10Measure the voltage between ground and terminal
30 (Red) at the blower relay.
Is the voltage within the specified value?11–14 vGo to Step 12Go to Step 11
111. Turn the ignition switch to OFF.
2. Check circuit (Red) between terminal 30 of the
blower relay to EF3 in the engine fuse block.
3. Repair any problem found in the wiring or ter-
minals at the fuse block connector C105, con-
nector C202, or at the relay socket.
Is the repair complete?–System OK–
121. Turn the ignition switch to OFF.
2. Check the continuity in the wiring harness be-
tween the blower relay terminal 85 (Black) and
ground.
Does the ohmmeter show the specified value? 0 ΩGo to Step 14Go to Step 13
13Repair any problem found in terminal 85 at the relay
connector, circuit (Black), Connector C201, or
ground G201.
Is the repair complete?–System OK–
14Replace the blower relay.
Is the repair complete?–System OK–
151. Turn the ignition switch to OFF.
2. Disconnect the wiring harness at the blower
motor.
3. Turn the ignition switch to ON.
4. Measure voltage between ground and blower
connector 1 (Yellow).
Is the voltage within the specified value?11–14 vGo to Step 17Go to Step 16
161. Turn the ignition switch to OFF.
2. Check circuit (Yellow) between blower connec-
tor terminal 1 and blower relay terminal 87.
3. Repair any problem found in the wiring or a
connector terminal at the blower connector,
connector C208, or the blower relay socket.
Is the repair complete?–System OK–
17Measure the resistance between the connector ter-
minals on the blower motor.
Does the resistance match the specified value? 5 ΩGo to Step 19Go to Step 18
18Replace the blower motor.
Is the repair complete?–System OK–
19Measure the resistance of circuit (Violet) between
terminal 2 of the blower connector and terminal 30
of the Max HI relay and terminal 6 of the power tran-
sistor.
Does the resistance match the specified value? 0 ΩGo to Step 21Go to Step 20

Page 2069 of 2643

DAEWOO NUBIRA 2004 Service Repair Manual 7D – 14IAUTOMATIC TEMPERATURE CONTROL HEATING, VENTILATION, AND AIR CONDITIONING SYSTEM
DAEWOO V–121 BL4
StepNo Yes Value(s) Action
20Repair the problem in circuit (Violet).
Is the repair complete

7D – 14IAUTOMATIC TEMPERATURE CONTROL HEATING, VENTILATION, AND AIR CONDITIONING SYSTEM
DAEWOO V–121 BL4
StepNo Yes Value(s) Action
20Repair the problem in circuit (Violet).
Is the repair complete?–System OK–
21Measure the resistance of circuit (Black) from termi-
nal 3 of the power transistor connector to ground.
Does the resistance match the specified value? 0 ΩGo to Step 23Go to Step 22
221. Trace circuit (Black) from terminal 3 of the
power transistor connector and terminal 87 of
the Max HI relay to ground G203.
2. Repair any problem found in the wiring, ground
G203.
Is the repair complete?–System OK–
23Replace the ATC controller.
the repair complete?–System OK–
MODE CONTROL DO NOT WORK
Refer to ”A/C Blower and Motor Controls Diagram”for the electrical schematic diagram of the circuits described in this
procedure.
Mode Controls Do Not Work
StepActionValue(s)YesNo
1Measure the voltage between terminal 4 and termi-
nal 5 of the mode motor.
Is the voltage within the specified value for motor?11–14 vGo to Step 3Go to Step 2
21. Check fuse F7?
2. Check the connector and circuit (Brown and
Black) for any wiring or terminal problems.
3. Repair any problems found.
Is the repair complete?–System OK–
31. Using the Motor Control Table, measure the
voltages at the specified terminals of the speci-
fied motor connectors.
2. Change the mode settings and observe the
voltage changes.
Are the voltages as specified?See the ”Motor
Control Table”Go to Step 4Go to Step 5
4Replace the motor that does not operate properly.
Is the repair complete?–System OK–
51. Using the Motor Control Table, measure the
voltages at the specified terminals of the speci-
fied controller connectors.
2. Change the mode settings and observe the
voltage changes.
Are the voltages as specified?See the ”Motor
Control 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

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DAEWOO NUBIRA 2004 Service Repair Manual 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?–Syste

Page 2071 of 2643

DAEWOO NUBIRA 2004 Service Repair Manual 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” fo

Page 2072 of 2643

DAEWOO NUBIRA 2004 Service Repair Manual 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 Cont

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