Mazda 6 2002 - Page 1139

CONTROL SYSTEM
U49
U
1O Water
temperature
sensor input
Water temperature
sensor
Depends on temperature
surrounding sensor
See Figure
4
• Inspect for continuity
(Climate control unitwater
temperature sensor: 1OA,
1IB)
• Inspect for short circuit
(Climate control unitwater
temperature sensor: 1OA)
• Inspect water temperature
sensor
• Inspect terminal voltage of
climate control unit (2H, 2L)
1P A/C Refrigerant
pressure switch
Fan switch at OFF
12
• Inspect for continuity or
short circuit (Climate control
unitrefrigerant pressure
switch: 1PA (Dual-
pressure type), 1PC
(Triple-pressure type))
(Refrigerant pressure
switchPCM: B1AC)
• Inspect refrigerant pressure
switch
• Inspect PCM terminal
voltage (1AC)
(See F45 PCM
INSPECTION )
Fan switch at 1st
position, A/C switch ON
Below 1.0
• Inspect terminal voltage of
climate control unit (2H, 2L)
1Q Evaporator
temperature
sensor input
signal
Evaporator
temperature sensor
Depends on temperature
surrounding sensor
See Figure
1
• Inspect for continuity
(Climate control unit
evaporator temperature
sensor: 1QA, 1IB)
• Inspect for short circuit
(Climate control unit
evaporator temperature
sensor: 1QA)
• Inspect evaporator
temperature sensor
• Inspect terminal voltage of
climate control unit (2H, 2L)
1R     
1S Solar radiation
sensor input
Solar radiation
sensor
Incandescent light (60W)
shining on solar
radiation sensor from
distance of approx.
100mm {3.9 in}
4.0
• Inspect for continuity or
short circuit (Climate control
unitsolar radiation sensor:
1SB, 1BA)
• Inspect terminal voltage of
climate control unit (1B)
• Inspect solar radiation
sensor
Light to solar radiation
sensor block
Below 1.0
1T GND Ground Under any condition
Below 1.0
• Inspect for continuity
(Climate control unit
ground: 1TGND)
• Inspect center panel
1U Potentiometer
signal
Air mix actuator Set temperature at MAX
COLD
0.6
• Inspect for continuity or
short circuit (Climate control
unitair mix actuator: 1U
C)
• Inspect air mix actuator
• Inspect terminal voltage of
climate control unit (1B)
Set temperature at MAX
HOT
4.3
1V     
Terminal Signal Connected to Test condition Voltage (V) Action