relay MAZDA 6 2002 Workshop Manual Suplement

CONTROL SYSTEM
U–17
U
1B +5 V•Air mix actuator
•Airflow mode
actuator
•Solar radiation
sensorIgnition switch at ON
position
5.0•Inspect for short circuit
(Climate control unit— air
mix actuator, airflow mode
actuator, solar radiation
sensor: 1B—B, B, A)
•Inspect air mix actuator
•Inspect airflow mode
actuator
•Inspect solar radiation
sensor
•Inspect terminal voltage of
climate control unit
connector (2H, 2L)
Ignition switch at LOCK
positionBelow 1.0•Replace climate control unit
1C Blower motor
control signalPower MOS FET Fan switch is OFF Below 1.0•Inspect terminal voltage of
climate control unit (1A)
Fan switch is at manual
LO4.1
Fan switch is at manual
HI7.9
1D—— —— —
1E Rear window
defroster SW
signalRear window
defroster relayRear 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 (2H, 2L)
•Inspect center panel
1F On-board
diagnostic signalA/C check
connectorTerminal 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
actuatorUnder any condition
Below 1.0•Inspect terminal voltage of
climate control unit (2L)
1J Water heater
selectGround Under any condition
Below 1.0•Inspect for continuity
(Climate control unit—
ground: 1J—GND)
•Inspect center panel Terminal Signal Connected to Test condition Voltage (V) Action

U–20
CONTROL SYSTEM
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
actuatorMoving 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
actuatorMoving 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
2H IG2 A/C 15 A fuse Ignition switch at ON
position
B+•Inspect for continuity or
short circuit (Climate control
unit—fuse: 2H—A/C 15 A
fuse)
•Inspect A/C 15 A fuse
Ignition switch at LOCK
position Below 1.0•Inspect for short circuit
(Climate control unit—fuse:
2H—A/C 15 A fuse)
2I Motor drive signal Air intake actuator Moving to
RECIRCULATE12•Inspect for continuity or
short circuit (Climate control
unit—air intake actuator:
2I—F, 2K—D)
•Inspect air intake actuator Moving to FRESH
Below 1.0
2J—— —— —
2K Motor drive signal Air intake actuator Moving to FRESH 12•Inspect for continuity or
short circuit (Climate control
unit—air intake actuator:
2K—D, 2I—F)
•Inspect air intake actuator Moving to
RECIRCULATE
Below 1.0
2L GND Ground Under any condition
Below 1.0•Inspect for continuity
(Climate control unit—
ground: 2L—GND) Terminal Signal Connected to Test condition Voltage (V) Action