Mazda CX-7 2007 Workshop Manual page 1189

Term Signal
Connected to
inal name
Illumination
A Instrument cluster
control
B TNS signal TNS relay
C —
D —
Airflow mode
E +5V
actuator
FAN ON/ Airflow volume
F
OFF control dial
Potentiomet Airflow mode
G
er input actuator
Rear
window Rear window
H
defroster defroster relay
switch
Evaporator
Evaporator
I temperature
temperature sensor
sensor input
J A/C BCM
CONTROL SYSTEM
Measurement
condition
Headlight switch ON
and panel light control
switch at max
Headlight switch ON
and panel light control
switch at min
Headlight switch OFF
Headlight switch ON
— —
— —
IG SW ON
IG SW OFF
Airflow volume control
dial ON
Airflow volume control
dial OFF
VENT
BILEVEL
HEAT
HEAT/DEF
DEFROSTER
Rear window defroster
switch OFF
Rear window defroster
switch ON
Compared with
temperature detected
by evaporator
temperature sensor
A/C switch ON, airflow
volume control dial at
1st
A/C switch OFF
Voltage (V) Inspection item (s)
• Wiring harness: continuity (Climate
control unit— instrument cluster: A—
0.45 2H) (Instrument cluster— body ground:
2A— GND)
• Instrument cluster
• Wiring harness: short circuit (Climate
9.96 control unit— instrument cluster: A—
2H)
• Wiring harness: short circuit (Climate
control unit— TNS relay: B— C)
1.0 or less
• TNS relay
• Headlight switch
• Wiring harness: continuity, short circuit
(Climate control unit— TNS relay: B—
B+ C)
• TNS relay
• Headlight switch
—
—
• Wiring harness: short circuit (Climate
control unit—airflow mode actuator: E—
B)
4.91
• Airflow mode actuator
• Climate control unit: terminal voltage (R,
L)
• Climate control unit replacement
1.0 or less
• Wiring harness: (Climate control unit—
0.06 airflow volume control dial: F— C)
• Airflow volume control dial
• Wiring harness: continuity (Climate
control unit— airflow volume control
dial: F— C)
12.18
• Climate control unit: terminal voltage
(R)
• Airflow volume control dial
• Wiring harness: continuity, short circuit
4.20
(Climate control unit— airflow mode
3.34
actuator: G— C)
2.44
• Airflow mode actuator
• Climate control unit: terminal voltage (E)
1.56
0.68
• Wiring harness: continuity, short circuit
(Climate control unit— rear window
B+
defroster relay: H— E)
• Rear window defroster relay
• Climate control unit: terminal voltage (L,
0.06 R)
• Climate control unit:
• Wiring harness: continuity (Climate
control unit—evaporator temperature
sensor: I—B, K—A)
• Wiring harness: short circuit (Climate
Refer to
control unit—evaporator temperature
graph 2
sensor: I—B)
• Evaporator temperature sensor
• Climate control unit: terminal voltage (L,
R)
• Wiring harness: continuity (Climate
0.03 control unit— BCM: J— 3V)
• BCM
• Wiring harness: continuity, short circuit
5.02
(Climate control unit— BCM: J— 3V)
—
—
07-40
07-40–17