Content .. 186 187 188 189 ..

Daewoo Matiz (2003 year). Manual - part 188

7A – 10 HEATING AND VENTILATION SYSTEM

BLOWER ELECTRICAL

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Step

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Action

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Value(s)

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Yes

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Verify the customer’s complaint.
Are the customer’s concerns verified.

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–

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Go to Step 2

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System OK

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Check the blower.
Does the blower run at any speed?

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–

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System OK

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Go to Step 3

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1. Disconnect the power connector from the blower

motor under the dashboard on the passenger side
of the vehicle.

2. Use an ohmmeter check the resistance between

the 1 terminal of the blower motor connector and
each step with the blower switch place each
position.

Does the ohmmeter show the specified value of the
each position?

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Refer to

“Specifica-

tions” in this

section.

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Go to Step 4

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Go to Step 5

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Replace the blower motor.
Is the repair complete?

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–

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System OK

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Go to Step 7

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Check the fuse Ef6.
Is the fuse blown?

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–

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Go to Step 6

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Go to Step 7

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1. Turn the ignition ON.
2. Use a short detector to locate a possible short.

From the fuse Ef6 to the blower switch.

From the blower swtich to the blower resistor.

From the blower resistor to the blower motor.

3. Repair any short.
4. Replace any blown fuse.
Is the repair complete?

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–

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System OK

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–

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1. Turn the ignition ON.
2. Disconnect the power connector from the blower

motor.

3. Use a test lamp to locate a possible short.

From the terminal 2 of the motor connector to
the terminal 3 of the motor switch connector.

From the terminal 2 of the motor connector to
the terminal 4 of the motor switch connector.

From the terminal 2 of the motor connector to
the terminal 5 of the motor switch connector.

From the terminal 2 of the motor connector to
the terminal 6 of the motor switch connector.

Does the test lamp light ON?

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–

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Go to Step 9

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Go to Step 8

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Replace the blower resistor.
Is the repair complete?

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–

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System OK

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Go to Step 10

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Replace the blower motor switch.
Is the repair complete?

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–

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System OK

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–

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1. Check the ground of the blower motor.
2. Repair the ground of the blower motor.
Is the repair complete?

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–

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System OK

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–

HEATING AND VENTILATION SYSTEM 7A – 11

IMPROPER AIR DELIVERY OR NO MODE SHIFT

This procedure provides a test of all functions of the heater/defroster unit.

1. Warm up the vehicle.

2. Keep the engine running.

3. Perform the tests outlined in the table below and look for the results indicated.

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CONTROL SETTINGS

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CORRECT RESULTS

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MODE

KNOB

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TEMP.

CONTROL

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BLOWER

MOTOR

SWITCH

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BLOWER

SPEED

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POWER

VENT

OUTLET

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FLOOR

OUTLET

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DEFROST

OUTLET

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SIDE

WINDOW

OUTLET

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Vent

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Cold

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Off

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Off

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Airflow

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Airflow

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Airflow

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Airflow

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Vent

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Cold

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High

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Ambient

Airflow

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Airflow

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Airflow

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Airflow

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Floor

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Cold to Hot

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High

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Airflow

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Cold to Hot

Airflow

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Minimum

Cold to Hot

Airflow

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Minimum

Cold to Hot

Airflow

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Defroster

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Cold to Hot

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High

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Airflow

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Minimum

Cold to Hot

Airflow

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Cold to Hot

Airflow

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Minimum

Cold to Hot

Airflow

If any of these settings does not produce the correct results, perform the following diagnostic procedure.

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Step

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Action

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Value(s)

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Yes

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Verify the customer’s complaint.
Are the customer’s concerns verified?

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–

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Go to Step 2

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System OK

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Examine the affected door in the unit for proper
cable attachment.

Check the cable connection to the door.

Check that the cable sheath is properly re-
tained.

Is the cable connected properly?

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–

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Go to Step 4

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Go to Step 3

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Repair as necessary.
Is the repair complete?

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–

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System OK

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–

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1. Disconnect the cable at the door.
2. Check the range of the door travel and the effort

required to move it.

Does the door move freely through its entire range
of travel so that it can close at both ends of the
range?

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–

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Go to Step 5

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Go to Step 3

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Check the travel of the Bowden cable by turning the
control knob.
Is the cable travel OK?

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–

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Go to Step 6

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Go to Step 7

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1. Reinstall the cable.
2. Recheck the system using the “Control

Settings/Correct Results” tests in this procedure.

Does the system perform properly?

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–

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System OK

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Go to Step 9

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1. Check the cable attachment at the control.
2. Check for a broken control.
Is there a problem with the cable attachment or the
control?

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–

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Go to Step 8

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Go to Step 9

7A – 12 HEATING AND VENTILATION SYSTEM

Improper Air Delivery or No Mode Shift (Cont’d)

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Step

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Action

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Value(s)

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Yes

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Repair the cable attachment or control as necessary.
Is the repair complete?

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–

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System OK

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Go to Step 9

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Recheck the system using the “Control
Settings/Correct Results” tests in this procedure.
Is the repair complete?

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–

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System OK

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Go to Step 10

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Check for airflow from the defroster or the vent
outlets.
Is there high airflow from the defroster or the vent
outlets?

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–

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Go to Step 11

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Go to Step 12

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Adjust the heater door at the floor and the vent door
to get the proper airflow.
Is the repair complete?

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–

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System OK

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–

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Switch the mode knob to defrost.
Is the defroster airflow OK?

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–

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Go to Step 13

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Go to Step 14

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1. Remove the heater outlet.
2. Check the heater outlet for obstructions.
3. Remove any obstructions in the heater outlet.
Is the repair complete?

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–

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System OK

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–

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Check the blower speeds for change in the airflow.
Does the blower speed increase as the control is
turned from 1 to 4?

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–

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Go to Step 15

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Go to ‘‘Blower

Electrical’’

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1. Check for obstructions in the system at the

blower inlet.

2. Remove any obstructions at the blower inlet.
Is the repair complete?

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–

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System OK

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Go to Step 16

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1. Set the blower on 4.
2. Rotate the temperature control from full hot to full

cold.

3. Listen for an airflow change.
Did the airflow change?

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–

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Go to Step 17

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Go to Step 18

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1. Check the temperature door adjustment, the

cables, the linkage, and the control.

2. Adjust the temperature control to full hot.
Is the repair complete?

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–

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System OK

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–

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ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ

1. Check the system for any obstruction between

the blower and the system outlets.

2. Remove any obstruction between the blower and

the system outlets.

Is the repair complete?

ÁÁÁÁÁ

–

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System OK

ÁÁÁÁÁÁ

–

HEATING AND VENTILATION SYSTEM 7A – 13

TOO MUCH HEAT

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Step

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Action

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Value(s)

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Yes

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ÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ

Verify the customer’s complaint.
Are the customer’s concerns verified?

ÁÁÁÁÁ

–

ÁÁÁÁÁÁÁ

Go to Step 2

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System OK

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ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ

Set the mode switch to the floor position.
Is there too much heat when the mode switch is in
the floor position?

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–

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Go to Step 3

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Go to Step 9

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Check for defroster bleed.
Is there objectionable defroster bleed?

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–

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Go to Step 4

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Go to Step 5

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ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ

1. Check the door travel, the cables, the controls,

and the linkage for the heater and the defroster.

2. Adjust or repair, as required.
Is the repair complete?

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–

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System OK

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–

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1. In vehicles equipped with A/C, set the A/C switch

OFF.

2. In all vehicles, set the blower speed to 4.
3. Set the temperature to full hot.
4. Turn the ignition switch to ON.
5. Check for airflow from the floor outlets.
6. Check the floor outlet attachment.
Is the airflow high?

ÁÁÁÁÁ

–

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Go to Step 7

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Go to Step 8

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ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ

Check for a change in the airflow at different blower
speeds.
Does the airflow change as the setting for the
blower-speed switch is changed?

ÁÁÁÁÁ

–

ÁÁÁÁÁÁÁ

System OK

ÁÁÁÁÁÁ

Go to ‘‘Blower

Electrical’’

ÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ

1. Check the temperature door travel, the cables,

and the linkage.

2. Adjust to full cold.
3. Check for full hot.
Is the repair complete?

ÁÁÁÁÁ

–

ÁÁÁÁÁÁÁ

System OK

ÁÁÁÁÁÁ

–

ÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ

Adjust or repair the floor/defroster and/or the vent/
floor mode.
Is the repair complete?

ÁÁÁÁÁ

–

ÁÁÁÁÁÁÁ

System OK

ÁÁÁÁÁÁ

–

ÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ

Set the mode switch to the vent position.
In the vent position, is the problem objectionable
bleed?

ÁÁÁÁÁ

–

ÁÁÁÁÁÁÁ

Go to Step 10

ÁÁÁÁÁÁ

Go to Step 15

ÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ

1. Check the system case for leaks.
2. Check the floor outlet attachment.
Are any problems found?

ÁÁÁÁÁ

–

ÁÁÁÁÁÁÁ

Go to Step 11

ÁÁÁÁÁÁ

Go to Step 12

ÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ

Repair the system case or the floor outlet attach-
ment as required.
Is the repair complete?

ÁÁÁÁÁ

–

ÁÁÁÁÁÁÁ

System OK

ÁÁÁÁÁÁ

Go to Step 12

ÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ

1. Turn the ignition switch OFF.
2. Turn the temperature control knob to full hot, then

rapidly to full cold.

Do you hear the door slam just before you reached
the end of the control travel?

ÁÁÁÁÁ

–

ÁÁÁÁÁÁÁ

Go to Step 13

ÁÁÁÁÁÁ

Go to Step 14

ÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ

Adjust the vent door to vent more.
Is the repair complete?

ÁÁÁÁÁ

–

ÁÁÁÁÁÁÁ

System OK

ÁÁÁÁÁÁ

–

Content .. 186 187 188 189 ..