Mazda 2007 CX-9, Service Highlights

Page: 321 / 614

CONTROL SYSTEM
07-40–9
07-40
FRONT POWER METAL OXIDE SEMICONDUCTOR FIELD EFFECT TRANSISTOR (POWER MOS FET)
CONSTRUCTION
id074000104800
Function
•
Controls the supply voltage to the front blower
motor according to the gate voltage sent from the
front 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 A and E
(between drain and source) changes according to
the voltage (gate voltage) applied to terminal F
(gate).
•
When the gate voltage increases, the resistance
between terminals A and E decreases, allowing
the current to flow easily.
End Of Sie
NG: REAR POWER MOS FET
B+
IG2
M
FRONT POWER MOS FET
FRONT
CLIMATE
CONTROL
UNIT
BLOWER
RELAY
FRONT
BLOWER
MOTOR
FRONT POWER MOS FET
FEEDBACK
GATE
VOLTAGE
am8rrn00000318
F
E
A
B
E
F
A
B D
DRAIN
FEEDBACK
GATE
SOURCE
am8rrn00000319
B
E
A
B
E
A
F F
LOW GATE VOLTAGE
HIGH GATE VOLTAGE
SMALL CURRENT
LARGE CURRENT
am8rrn00000320
3423-1U-06H(07-40).fm 9 ページ ２００６年１１月２２日 水曜日 午後２時４８分