Mazda CX 7. Manual — part 280
ON-BOARD DIAGNOSTIC
07-02–7
07-02
DTC B1274, B1275
id070200800800
Diagnostic Procedure
End Of Sie
DTC B1274,
B1275
Airflow mode actuator (potentiometer) system
POSSIBLE
CAUSE
• Airflow mode actuator malfunction
• Open circuit in wiring harness between climate control unit and airflow mode actuator
• Short circuit in wiring harness between climate control unit (terminal P) and airflow mode actuator
(terminal C)
STEP
INSPECTION
ACTION
1
• Inspect the airflow mode actuator. (See 07-40-11
AIRFLOW MODE ACTUATOR INSPECTION.)
• Is it normal?
Yes
Go to the next step.
No
Replace the airflow mode actuator. (See 07-40-10
AIRFLOW MODE ACTUATOR REMOVAL/
INSTALLATION.)
2
• Disconnect the climate control unit connector and
the airflow mode actuator connector.
• Is there an open circuit in the wiring harness
between the following terminals of the climate
control unit and the airflow mode actuator?
— J— B
— P— C
— C— A
Yes
Repair the wiring harness.
No
Go to the next step.
3
• Is there a short circuit to ground in the wiring
harness between climate control unit terminal P
and airflow mode actuator terminal C?
Yes
Repair the wiring harness.
No
The system is normal at present. (Clear the malfunction
from the memory.)
CLIMATE CONTROL UNIT CONNECTOR
AIRFLOW MODE ACTUATOR CONNECTOR
A
M
B
C
D
E
F
G
I
L
J
K
N
O
P
Q
R
S
T
U
V
W
X
A
B
C
D
F
*
H
1871-1U-06B(07-02).fm 7 ページ 2006年3月16日 木曜日 午後4時22分
ON-BOARD DIAGNOSTIC
07-02–8
DTC B1282, B1283
id070200800900
Diagnostic Procedure
End Of Sie
DTC B1947, B2014
id070200801000
Diagnostic Procedure
DTC B1282,
B1283
Air mix actuator (potentiometer) system
POSSIBLE
CAUSE
• Air mix actuator malfunction
• Open circuit in wiring harness between climate control unit and air mix actuator
• Short circuit in wiring harness between climate control unit (terminal N) and air mix actuator (terminal
C)
STEP
INSPECTION
ACTION
1
• Inspect the air mix actuator. (See 07-40-21 AIR
MIX ACTUATOR INSPECTION.)
• Is it normal?
Yes
Go to the next step.
No
Replace the air mix actuator. (See 07-40-19 AIR MIX
ACTUATOR REMOVAL/INSTALLATION.)
2
• Disconnect the climate control unit connector and
the air mix actuator connector.
• Is there an open circuit in the wiring harness
between the following terminals of the climate
control unit and the air mix actuator?
— J— A
— N— C
— C— B
Yes
Repair the wiring harness.
No
Go to the next step.
3
• Is there a short circuit to ground in the wiring
harness between climate control unit terminal N
and air mix actuator terminal C?
Yes
Repair the wiring harness.
No
The system is normal at present. (Clear the malfunction
from the memory.)
CLIMATE CONTROL UNIT CONNECTOR
AIR MIX ACTUATOR CONNECTOR
A
M
B
C
D
E
F
G
I
L
J
K
N
O
P
Q
R
S
T
U
V
W
X
A
B
C
D
F
*
H
DTC B1947,
B2014
Evaporator temperature sensor system
POSSIBLE
CAUSE
• Evaporator temperature sensor malfunction
• Open or short circuit in wiring harness between climate control unit and evaporator temperature sensor
STEP
INSPECTION
ACTION
1
• Inspect the evaporator temperature sensor. (See
07-40-9 EVAPORATOR TEMPERATURE
SENSOR INSPECTION.)
• Is it normal?
Yes
Go to the next step.
No
Replace the evaporator temperature sensor. (See 07-
40-8 EVAPORATOR TEMPERATURE SENSOR
REMOVAL/INSTALLATION.)
2
• Disconnect the climate control unit connector and
the evaporator temperature sensor connector.
• Is there an open circuit in the wiring harness
between the following terminals of the climate
control unit and the evaporator temperature
sensor?
— F— B
— C— A
Yes
Repair the wiring harness.
No
Go to the next step.
3
• Is there a short circuit to ground in the wiring
harness between climate control unit terminal F
and evaporator temperature sensor terminal B?
Yes
Repair the wiring harness.
No
Connect the climate control unit connector, then go to
the next step.
1871-1U-06B(07-02).fm 8 ページ 2006年3月16日 木曜日 午後4時22分
ON-BOARD DIAGNOSTIC
07-02–9
07-02
End Of Sie
DTC B2832
id070200801100
Diagnostic Procedure
End Of Sie
4
• Turn the ignition switch to the ON position.
• Inspect the voltage at the following climate control
unit terminal (wiring harness-side).
— Terminal F (evaporator temperature sensor
input signal)
• Is the voltage normal? (Approx. 5 V)
Yes
The system is normal at present. (Clear the malfunction
from the memory.)
No
Inspect the connection of the climate control unit
connector. (See 07-40-13 CLIMATE CONTROL UNIT
INSPECTION [FULL-AUTO AIR CONDITIONER].)
STEP
INSPECTION
ACTION
CLIMATE CONTROL UNIT CONNECTOR
EVAPORATOR TEMPERATURE SENSOR CONNECTOR
A
M
B
C
D
E
F
G
I
L
J
K
N
O
P
Q
R
S
T
U
V
W
X
A
B
H
DTC B2832
Airflow mode actuator (motor lock) system
Note
• DTC B2832 will be detected when the ignition switch is turned to the ON position and approx.
30 s have passed since the mode actuator is operated.
POSSIBLE
CAUSE
• Airflow mode actuator malfunction
• A/C unit (airflow mode link and airflow mode crank) malfunction
• Open or short circuit in wiring harness between climate control unit and airflow mode actuator
STEP
INSPECTION
ACTION
1
• Disconnect the airflow mode actuator connector.
• Connect battery positive voltage to airflow mode
actuator terminal D (or terminal F) and terminal F
(or terminal D) to ground.
• Does the airflow mode actuator operate?
Yes
Connect the connector, then go to Step 3.
No
Go to the next step.
2
• Remove the airflow mode actuator.
• Operate the airflow mode main link manually.
• Does the airflow mode main link operate
smoothly?
Yes
Replace the airflow mode actuator. (See 07-40-10
AIRFLOW MODE ACTUATOR REMOVAL/
INSTALLATION.)
No
Replace the airflow mode main link, airflow mode sub
link, and the airflow mode crank.
3
• Disconnect the climate control unit connector.
• Connect battery positive voltage to climate control
unit terminal O (or terminal Q) and terminal Q (or
terminal O) to ground.
• Does the airflow mode actuator operate?
Yes
Inspect the connection of the climate control unit
connector. (See 07-40-13 CLIMATE CONTROL UNIT
INSPECTION [FULL-AUTO AIR CONDITIONER].)
No
Repair the wiring harness.
4
• Turn the ignition switch to the ON position.
• Press the MODE switch to change the mode
(operate the airflow mode actuator) and wait for 30
s or more.
• Perform the DTC inspection.Is DTC B2832
indicated?
Yes
Recheck malfunction symptoms, then repeat from Step
1 if the malfunction recurs.
No
DTC troubleshooting completed.
CLIMATE CONTROL UNIT CONNECTOR
AIRFLOW MODE ACTUATOR CONNECTOR
A
M
B
C
D
E
F
G
I
L
J
K
N
O
P
Q
R
S
T
U
V
W
X
A
B
C
D
F
*
H
1871-1U-06B(07-02).fm 9 ページ 2006年3月16日 木曜日 午後4時22分
ON-BOARD DIAGNOSTIC
07-02–10
DTC B2834
id070200801200
Diagnostic Procedure
End Of Sie
A/C OPERATION CHECK MODE
id070200801300
*
: Shown on the information display (at the set temperature display) according to each M-MDS display.
DTC B2834
Air mix actuator (motor lock) system
Note
• DTC B2834 will be detected when the ignition switch is turned to the ON position and approx.
30 s have passed since the mode actuator is operated.
POSSIBLE
CAUSE
• Air mix actuator malfunction
• A/C unit (air mix link and air mix crank) malfunction
• Open or short circuit in wiring harness between climate control unit and air mix actuator
STEP
INSPECTION
ACTION
1
• Disconnect the air mix actuator connector.
• Connect battery positive voltage to air mix actuator
terminal F (or terminal D) and terminal D (or
terminal F) to ground.
• Does the air mix actuator operate?
Yes
Connect the connector, then go to Step 3.
No
Go to the next step.
2
• Remove the air mix actuator.
• Operate the air mix link manually.
• Does the air mix link operate smoothly?
Yes
Replace the air mix actuator. (See 07-40-19 AIR MIX
ACTUATOR REMOVAL/INSTALLATION.)
No
Replace the air mix link and the air mix crank.
3
• Disconnect the climate control unit connector.
• Connect battery positive voltage to climate control
unit terminal S (or terminal U) and terminal U (or
terminal S) to ground.
• Does the air mix actuator operate?
Yes
Inspect the connection of the climate control unit
connector. (See 07-40-13 CLIMATE CONTROL UNIT
INSPECTION [FULL-AUTO AIR CONDITIONER].)
No
Repair the wiring harness.
4
• Turn the ignition switch to the ON position.
• Turn the temperature setting dial to change the set
temperature (operate the air mix actuator) and wait
for 30 s or more.
• Perform the DTC inspection.Is DTC B2834
indicated?
Yes
Recheck malfunction symptoms, then repeat from Step
1 if the malfunction recurs.
No
DTC troubleshooting completed.
CLIMATE CONTROL UNIT CONNECTOR
AIR MIX ACTUATOR CONNECTOR
A
M
B
C
D
E
F
G
I
L
J
K
N
O
P
Q
R
S
T
U
V
W
X
A
B
C
D
F
*
H
M-MDS display
Target part
Operation condition
Illumination Of All
Indicator lights
Climate control unit
All A/C indicator lights illuminated
Blower Motor Speed
Blower motor
Air mix Actuator
Air mix door
Airflow Mode Actuator
Airflow mode door
Air Intake Actuator / Air
conditioning compressor
Air intake door
A/C compressor
FRESH
⇔ REC
ON
⇔ OFF
→
→
→
→
→
→
→
OFF
1ST
2ND
3RD
4TH
5TH
6TH
7TH
→
→
→
0 %
50 % 100 %
50 %
→
→
→
→
VENT
BI-LEVEL
HEAT
HEAT/DEF
DEFROSTER
1871-1U-06B(07-02).fm 10 ページ 2006年3月16日 木曜日 午後4時22分
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