Mazda 2002 6 Workshop Manual page 1199

Terminal Signal
1C Blower motor
control signal
1D —
1E Rear window
defroster SW
signal
1F On-board
diagnostic signal
1G —
1H —
1I GND
1J —
1K Ambient
temperature
sensor input
1L —
1M Cabin
temperature
sensor input
1N —
U–48
CONTROL SYSTEM
Connected to
Power MOS FET Fan switch is OFF
Fan switch is at manual
LO
Fan switch is at manual
HI
—
Rear window Rear window defroster
defroster relay switch is off
Rear window defroster
switch is on
A/C check Terminal A of A/C check
connector connector is shorted.
Other
—
—
• Cabin
Under any condition
temperature
sensor
• Evaporator
temperature
sensor
• Ambient
temperature
sensor
• Water
temperature
sensor
• Air mix actuator
• Airflow mode
actuator
—
Ambient Depends on temperature
temperature sensor surrounding sensor
—
Cabin temperature Depends on temperature
sensor surrounding sensor
—
Test condition Voltage (V)
Below 1.0
—
Below 1.0
Below 1.0
—
—
Below 1.0
—
See Figure
—
See Figure
—
Action
• Inspect terminal voltage of
climate control unit (1A)
4.1
7.9
— —
• Inspect for continuity or
short circuit (Climate control
unit—rear window defroster
12
relay: 1E—E)
• Inspect rear window
defroster relay
• Inspect terminal voltage of
climate control unit (1H, 1L)
• Inspect audio switch panel
• Inspect for continuity
(Climate control unit—A/C
check connector: 1F—A)
• Inspect short circuit (Climate
control unit—A/C check
5.4 connector: 1F—A)
• Inspect terminal voltage of
climate control unit (2H, 2L)
— —
— —
• Inspect terminal voltage of
climate control unit (2L)
— —
• Inspect for continuity
(Climate control unit—
ambient temperature
sensor: 1K—B, 1I—A)
• Inspect for short circuit
(Climate control unit—
2 ambient temperature
sensor: 1K—B)
• Inspect ambient
temperature sensor
• Inspect terminal voltage of
climate control unit (2H, 2L)
— —
• Inspect for continuity
(Climate control unit— cabin
temperature sensor: 1M—B,
1I—A)
• Inspect for short circuit
(Climate control unit— cabin
3
temperature sensor: 1M—B)
• Inspect cabin temperature
sensor
• Inspect terminal voltage of
climate control unit (2H, 2L)
— —