Mazda X-5. Manual - part 89

CONTROL SYSTEM 

07–40–3

07–40

AIR MIX ACTUATOR CONSTRUCTION

E5U074061415N01

• A communication type has been adopted.

End Of Sie

AIRFLOW MODE ACTUATOR CONSTRUCTION

E5U074061070N01

• A communication type has been adopted.

End Of Sie

BLOWER MOTOR CONSTRUCTION

E5U074061020N01

• A sirocco fan has been adopted.

End Of Sie

HOT

280

°

COLD

E5U740ZS5004

VENT

105

°

DEFROSTER

E5U740ZS5005

SIROCCO FAN

BLOWER MOTOR

E5U740ZS5006

CONTROL SYSTEM 

07–40–4

POWER METAL OXIDE SEMICONDUCTOR FIELD EFFECT TRANSISTOR (POWER MOS FET) FUNCTION

E5U074000116N01

Function

• Controls the supply voltage to the blower motor 

according to the gate voltage sent from the 
climate control unit and adjusts the rotation speed 
(airflow volume).

Construction/Operation

• There are four electrodes: source, gate, drain and feedback electrodes.

• The resistance between terminals C and D 

(between drain and source) changes according to 
the voltage (gate voltage) applied to terminal A 
(gate).

• When the gate voltage increases, the resistance 

between terminals C and D decreases, allowing 
the current to flow easily.

End Of Sie

B+

IG2

M

POWER MOS FET

CLIMATE 
CONTROL 
UNIT

FEED 
BACK

GATE 
VOLTAGE

BLOWER MOTOR

BLOWER 
RELAY

E5U740ZS5007

C

D

A

B

C

D

A

B

DRAIN

FEEDBACK

GATE

SOURCE

E5U740ZS5008

C

B

D

A

C

B

D

A

LOW GATE VOLTAGE

HIGH GATE VOLTAGE

SMALL CURRENT

LARGE CURRENT

E5U740ZS5009

CONTROL SYSTEM 

07–40–5

07–40

MAGNETIC CLUTCH CONSTRUCTION

E5U074061010N01

• Consists of the following parts:

— Pressure plate

— Shim

— Snap ring

— A/C compressor pulley

— Stator

End Of Sie

EVAPORATOR TEMPERATURE SENSOR CONSTRUCTION

E5U074061022N01

• A thermistor type has been adopted.

End Of Sie

REFRIGERANT PRESSURE SWITCH CONSTRUCTION

E5U074061503N01

• A triple-pressure type has been adopted.

• The refrigerant pressure switch is composed of the high-pressure and low-pressure switches, which cut the A/

C signal to protect the refrigeration cycle if pressure in the refrigeration cycle is too high or too low; and the 
medium-pressure switch, which sends an cooling fan control signal according to the operation load of the 
cooling fan.

Medium-pressure Switch

• When refrigerant pressure reaches approx. 1.52 MPa {15.5 kgf/cm

2

, 221 psi} or more, the contact turns on, 

and a cooling fan control signal is sent to the PCM.

End Of Sie

PRESSURE 
PLATE

SHIM

SNAP 
RING

SNAP 
RING

A/C COMPRESSOR 
PULLEY

STATOR

E5U740ZS5104

EVAPORATOR 
TEMPERATURE 
SENSOR

E5U740ZS5101

ON

OFF

PCM

REFRIGERANT PRESSURE SWITCH

OPERATING PRESSURE (MPa {kgf/cm

2

,psi})

COOLING FAN
CONTROL 
SIGNAL

MEDIUM-
PRESSURE
SWITCH

0.2—0.4 {2.04—4.07, 29.0—58.0}

1.52—1.72 {15.5—17.5, 221—249}

E5U740ZS5103

CONTROL SYSTEM 

07–40–6

CLIMATE CONTROL UNIT CONSTRUCTION

E5U074061190N01

• Composed of the following parts:

— Fan switch

— Airflow mode control dial

— REC switch

— A/C switch

— Temperature control dial

— Rear window defroster switch

• Hot or cold air is blown from the waist louver beside the audio when any mode position (OPEN-VENT, OPEN-

BI-LEVEL, OPEN-HEAT) is selected.

End Of Sie

AIRFLOW MODE 
CONTROL DIAL

TEMPERATURE 
CONTROL DIAL

FAN SWITCH

REAR WINDOW 
DEFROSTER SWITCH

REC SWITCH

A/C SWITCH

E5U740ZS5011

OPEN/VENT

OPEN/BI-LEVEL

OPEN/HEAT

WAIST 
LOUVER

WAIST 
LOUVER

E5U740ZS5012