Mazda 6. Manual — part 385

U–44

CONTROL SYSTEM

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CLIMATE CONTROL UNIT REMOVAL

A6E854061190W03

1. Disconnect the negative battery cable.
2. Disconnect the air mix and airflow mode wires from each wire clamp and link. (Manual air conditioner)
3. Remove the center panel. (See

T–96 CENTER PANEL MODULE REMOVAL/INSTALLATION

.)

4. Remove the screws and climate control unit. (Full-auto air conditioner)
5. Release the hook and pull the climate control unit toward you. (Manual air conditioner)
6. Disconnect the climate control unit connectors

and remove the climate control unit. (Manual air
conditioner)

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CONTROL SYSTEM

U–45

U

CLIMATE CONTROL UNIT INSTALLATION

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1. Pass each wire through the following routes then

connect to A/C unit. (Manual air conditioner)

2. Connect the climate control unit connectors.

(Manual air conditioner)

3. Install the climate control unit to the center panel.

(Full-auto air conditioner)

4. Install the center panel.
5. Adjust the climate control unit wires. (Manual air

conditioner) (See

U–46 CLIMATE CONTROL

UNIT WIRE ADJUSTMENT

.)

6. Connect the negative battery cable.

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CLIMATE CONTROL UNIT DISASSEMBLY/ASSEMBLY

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1. Disassemble in the order indicated in the table.

2. Assemble in the reverse order of disassembly.

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1

Illumination bulb

2

Body

1

Fan switch

2

Air mix wire
(See

U–46 Wire Disassembly Note

)

(See

U–46 Wire Assembly Note

)

3

Airflow mode wire
(See

U–46 Wire Disassembly Note

)

(See

U–46 Wire Assembly Note

)

4

Body

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U–46

CONTROL SYSTEM

Wire Disassembly Note

1. Disassemble the wires in the shown in the figure.

Wire Assembly Note

1. Assemble the wires to the position as shown in

the figure.

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CLIMATE CONTROL UNIT WIRE ADJUSTMENT

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Air Mix Wire

1. Set the temperature control dial at max cold.
2. Set the air mix link to max cold in the direction shown

by the arrow and insert a screwdriver at the set hole.

3. Connect the air mix wire to air mix link.
4. Clamp the air mix wire to wire clamp.
5. Verify that the temperature control dial moves its full

stroke.

Airflow Mode Wire

1. Set the airflow mode control dial at defroster.

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CONTROL SYSTEM

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U

2. Set the airflow mode main link to defroster in the

direction shown by the arrow and insert a
screwdriver at the set hole.

3. Connect the airflow mode wire to airflow mode

main link.

4. Clamp the airflow mode wire to wire clamp.
5. Verify that the airflow mode control dial moves its

full stroke.

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CLIMATE CONTROL UNIT INSPECTION

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Full-auto Air Conditioner

1. Connect the all center panel connectors.
2. Turn the ignition switch to ON position.
3. Measure the voltage at each climate control unit terminal and refer to the terminal voltage list.

• If not as specified, inspect the parts listed under “Action” and the related wiring harness.

— If there is any malfunction, replace the climate control unit.

Terminal Voltage List (Reference)

A6E8540W035

Terminal

Signal

Connected to

Test condition

Voltage (V)

Action

1A

Blower motor
feedback signal

• Blower motor

• Power MOS

FET

Fan switch is OFF

12

1. Inspect for continuity or

short circuit (Climate control
unit—blower motor: 1A—B)
(Climate control unit—power
MOS FET: 1A—B, 1C—E)
(Blower motor—blower
relay: A—C) (Blower relay—
fuse: D—BLOWER 40 A
fuse)

2. Inspect for continuity (Power

MOS FET—ground: A—
GND) (Blower relay—
ground: A—GND)

3. Inspect power MOS FET
4. Inspect blower motor
5. Inspect blower relay
6. Inspect BLOWER 40 A fuse
7. Replace power MOS FET

Fan switch is at manual
LO

7.8

Fan switch is at manual
HI

0.2

1B

+5 V

• Air mix actuator

• Airflow mode

actuator

• Solar radiation

sensor

Ignition switch at ON
position

5.0

• Inspect for short circuit

(Climate control unit— air
mix actuator, airflow mode
actuator, solar radiation
sensor: 1B—B, B, A)

• Inspect air mix actuator

• Inspect airflow mode

actuator

• Inspect solar radiation

sensor

• Inspect terminal voltage of

climate control unit
connector (2H, 2L)

Ignition switch at LOCK
position

Below 1.0

• Replace climate control unit

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