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Mazda CX-5 Service & Repair Manual: Airflow Volume Control [Full Auto Air Conditioner]

Mazda CX-5 Service & Repair Manual / HVAC / A/C / Airflow Volume Control [Full Auto Air Conditioner]

Purpose

Function

Airflow Volume Automatic Control


Airflow Volume Manual Control


Airflow volume control dial

Blower motor applied voltage

1st

3.5 V

2nd

5.2 V

3rd

6.9 V

4th

8.6 V

5th

10.0 V

6th

12.1 V

7th

14.6 V*1, 13.0*2


*1 When the airflow mode is except HEAT.

*2 When the airflow mode is HEAT.

Correction


Correction name

Set temperature

Blower motor applied voltage

MAX HOT correction

32.0/90

12.1 (V): AUTO-HI

MAX COLD correction

15.0/60

14.6 (V): MAX-HI


Construction


Input device

Control part

Output device

  • Airflow volume control dial (climate control unit)

  • Temperature setting dial (climate control unit)

  • Passenger compartment temperature sensor

  • Solar radiation sensor

  • Ambient temperature sensor

  • Engine coolant temperature sensor

  • Airflow mode actuator

  • Climate control unit

  • PCM

  • Front body control module (FBCM)

  • Instrument cluster

  • Power MOS FET

  • Blower motor


Operation

1. The climate control unit sends a fan operation signal to the front body control module (FBCM) based on the airflow volume control dial ON operation.

2. When the front body control module (FBCM) turns on the blower relay based on the fan operation signal, the blower motor rotates.

3. The climate control determines the airflow volume based on the operations of the airflow volume control dial and the temperature setting dial, airflow mode condition, and signals from each sensor.

4. Based on the result of the airflow volume determination and correction, the climate control unit control the power MOS FET and changes the airflow volume (blower motor applied voltage).

5. The rotation speed of the blower motor changes according to the applied voltage from the power MOS FET.


Airflow Temperature Control [Full Auto Air Conditioner]
Purpose The airflow temperature control changes the airflow temperature according to the vehicle conditions. Function The air mix actuator is driven and the air mix door positio ...

Ambient Temperature Sensor Inspection [Full Auto Air Conditioner]
1. Measure the temperature around the ambient temperature sensor and measure the resistance between the ambient temperature sensor terminal. If the characteristics of the ambient tempera ...

Other materials:

Oil Seal (Side Gear) Replacement
1. Remove the drain plug and the drain differential oil into a container. 2. Install a new washer and the drain plug, and tighten. 3. Remove the rear drive shaft.. 4. Remove the clip from the drive shaft. CAUTION: Wrap the end of a screwdriver with cloth to prevent scratches to the i ...

Climate Control Unit [Manual Air Conditioner]
Purpose The climate control unit performs air conditioning according to the operation by the users and the driving conditions of the vehicle. Function The climate control unit determines optimum air-conditioning based on the input signals from each sensor and the control mo ...

Air Filter
Purpose The air filter removes pollen and dust in the intake air and purifies air flowing into the cabin. Function The air filter removes pollen and dust using a dust collecting filter. Construction The air filter is installed to the blower unit. It ...

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