Mazda CX-7 2007 Workshop Manual page 1120

DTC B2834
Air mix actuator (motor lock) system
Note
DTC B2834
• 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.
• Air mix actuator malfunction
POSSIBLE
• A/C unit (air mix link and air mix crank) malfunction
CAUSE
• Open or short circuit in wiring harness between climate control unit and air mix actuator
Diagnostic Procedure
STEP
• Disconnect the air mix actuator connector.
1
• 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?
• Remove the air mix actuator.
2
• Operate the air mix link manually.
• Does the air mix link operate smoothly?
• Disconnect the climate control unit connector.
3
• 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?
• Turn the ignition switch to the ON position.
4
• 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?
CLIMATE CONTROL UNIT CONNECTOR
W U S Q O
V T R P
X
End Of Sie
A/C OPERATION CHECK MODE
M-MDS display
Illumination Of All
Indicator lights
Blower Motor Speed
Air mix Actuator
Airflow Mode Actuator
Air Intake Actuator / Air
conditioning compressor
* : Shown on the information display (at the set temperature display) according to each M-MDS display.
07-02–10
ON-BOARD DIAGNOSTIC
INSPECTION
M K I G E C A
N L J D
H F B
Target part
Climate control unit
Blower motor
Air mix door
Airflow mode door
Air intake door
A/C compressor
Yes Connect the connector, then go to Step 3.
No Go to the next step.
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.
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.
Yes Recheck malfunction symptoms, then repeat from Step
1 if the malfunction recurs.
No DTC troubleshooting completed.
AIR MIX ACTUATOR CONNECTOR
F
Operation condition
All A/C indicator lights illuminated
→
→ → →
1ST 4TH
OFF 2ND 3RD
→ →
0 % 50 % 100 % 50 %
→ → →
VENT BI-LEVEL HEAT HEAT/DEF
FRESH ⇔ REC
ON ⇔ OFF
id070200801200
ACTION
D C B A
*
id070200801300
→
→ →
5TH 6TH 7TH
→
→
DEFROSTER