Mazda 6 2002 - Page 1140

U50
CONTROL SYSTEM
1W Potentiometer
signal
Airflow mode
actuator
VENT mode 4.3 • Inspect for continuity or
short circuit (Climate control
unitairflow mode actuator:
1WC)
• Inspect airflow mode
actuator
• Inspect terminal voltage of
climate control unit (1B)
BI-LEVEL mode 3.3
HEAT mode 2.3
HEAT/DEF mode 1.5
DEFROSTER mode
0.6
1X Hazard warning
SW signal
Hazard warning
switch
Hazard warning switch is
off
12
• Inspect for continuity or
short circuit (Climate control
unitflasher unit: 1XH)
• Inspect flasher unit
Hazard warning switch is
on Below 1.0
• Inspect terminal voltage of
climate control unit (1T)
• Inspect center panel
2A Panel light control
signal
Panel light control
switch
Headlight switch ON and
panel light control switch
at max. illumination
0.2
• Inspect for continuity
(Climate control unit panel
light control switch: 2AC)
(Panel light control switch
ground: CGND)
• Inspect panel light control
switch
Headlight switch ON and
panel light control switch
at min. illumination
10.2
• Inspect for short circuit
(Climate control unit panel
light control switch: 2AC)
2B TNS signal TNS relay Headlight switch OFF
Below 1.0
• Inspect for short circuit
(Climate control unitTNS
relay: 2BD)
• Inspect TNS relay
• Inspect headlight switch
Headlight switch ON
12
• Inspect for continuity or
short circuit (Climate control
unitTNS relay: 2BD)
• Inspect TNS relay
• Inspect headlight switch
2C Motor drive signal Air mix actuator Moving to COLD 12 • Inspect for continuity or
short circuit (Climate control
unitair mix actuator: 2D
D, 2CF)
• Inspect air mix actuator
Moving to HOT
Below 1.0
2D Motor drive signal Air mix actuator Moving to HOT 12 • Inspect for continuity or
short circuit (Climate control
unitair mix actuator: 2C
F, 2DD)
• Inspect air mix actuator
Moving to COLD
Below 1.0
2E Motor drive signal Airflow mode
actuator
Moving to DEFROSTER 12 • Inspect for continuity or
short circuit (Climate control
unitairflow mode actuator:
2EF, 2GD)
• Inspect airflow mode
actuator
Moving to VENT
Below 1.0
2F Backup power
supply
ROOM 15 A fuse Under any condition
B+
• Inspect for continuity or
short circuit (Climate control
unitfuse: 2F ROOM 15
A fuse)
• Inspect ROOM 15 A fuse
2G Motor drive signal Airflow mode
actuator
Moving to VENT 12 • Inspect for continuity or
short circuit (Climate control
unitairflow mode actuator:
2GD, 2EF)
• Inspect airflow mode
actuator
Moving to DEFROSTER
Below 1.0
Terminal Signal Connected to Test condition Voltage (V) Action