Mazda 2002 6 - Page 1199

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