Mazda 2007 CX-9, Service Highlights

Page: 322 / 614

CONTROL SYSTEM
07-40–10
REAR POWER METAL OXIDE SEMICONDUCTOR FIELD EFFECT TRANSISTOR (POWER MOS FET)
CONSTRUCTION
id074000104900
Function
•
Controls the supply voltage to the rear 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 B and A
(between drain and source) changes according to
the voltage (gate voltage) applied to terminal C
(gate).
•
When the gate voltage increases, the resistance
between terminals B and A decreases, allowing
the current to flow easily.
End Of Sie
NG: MAGNETIC CLUTCH
B+ IG2
M
REAR POWER MOS FET
FRONT
CLIMATE
CONTROL
UNIT
REAR
BLOWER
RELAY
REAR
BLOWER
MOTOR
REAR POWER MOS FET
FEEDBACK
GATE
VOLTAGE
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C
D
A
B
A
B D
C
DRAIN
FEEDBACK
GATE
SOURCE
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B
D
A
B
D
A
C C
LOW GATE VOLTAGE
HIGH GATE VOLTAGE
SMALL CURRENT
LARGE CURRENT
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3423-1U-06H(07-40).fm 10 ページ ２００６年１１月２２日 水曜日 午後２時４８分