Mazda CX-9 Grand Touring. Manual - part 429

 

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Mazda CX-9 Grand Touring. Manual - part 429

 

 

Fig. 55: Refrigerant Pressure Switch Terminals Continuity Chart (3 Of 3) 
Courtesy of MAZDA MOTORS CORP. 

FRONT CLIMATE CONTROL UNIT REMOVAL/INSTALLATION 

1. Disconnect the negative battery cable.  

2. Remove the following parts: 

1. Decoration panel (See DECORATION PANEL REMOVAL/INSTALLATION .)  

2. Front console box mat (See FRONT CONSOLE BOX MAT REMOVAL/INSTALLATION .)  

3. Indicator panel (See INDICATOR PANEL REMOVAL/INSTALLATION .)  

4. Front console box (See FRONT CONSOLE BOX REMOVAL/INSTALLATION .)  

5. Center panel (See CENTER PANEL REMOVAL/INSTALLATION .)  

3. Remove the screws.  

4. Remove the front climate control unit.  

5. Install in the reverse order of removal. 

Fig. 56: Identifying Front Climate Control Unit & Screws 
Courtesy of MAZDA MOTORS CORP. 

FRONT CLIMATE CONTROL UNIT INSPECTION

 

2008 Mazda CX-9 Grand Touring 

2008 HVAC Control System (HVAC) - Mazda CX-9

  

Microsoft 

 

Sunday, November 15, 2009 10:12:36 AM

Page 34 

© 2005 Mitchell Repair Information Company, LLC. 

1. Connect the front climate control unit connector.  

2. Turn the ignition switch to the ON position.  

3. Connect the negative (-) lead of the tester to body ground.  

4. By inserting the positive (+) lead of the tester into each front climate control unit terminal, measure the 

voltage according to the terminal voltage table. 

If there is any malfunction, inspect the parts under "Inspection item (s)". 

If the parts under "Inspection item (s)" are found to be normal, replace the front climate 
control unit.  

TERMINAL VOLTAGE TABLE (REFERENCE) 

Fig. 57: Identifying Front Climate Control Unit Terminal 
Courtesy of MAZDA MOTORS CORP. 

TERMINAL VOLTAGE REFERENCE 

Terminal Signal name

Connected to

Measurement 
condition

Voltage 

(V)

Inspection item (s)

1A

Motor 
operation

Driver-side front 
air mix actuator

Temperature control 
dial (driver side): 
Moving towards 
COLD

1.0 or 

less

Wiring harness: 
continuity, short circuit 
(Front climate control 
unit-driver-side front 
air mix actuator: 1A-G, 
1F-F)  

Driver-side front air 
mix actuator  

Temperature control 
dial (driver side): 
Moving towards 
HOT

B+

1B

B+

BCM

Under any 
condition

B+

Wiring harness: 
continuity, short circuit 
(Front climate control 
unit-BCM: 1B-5H)  

BCM  

1C

Motor 
operation

Passenger-side 
front air mix 
actuator

Temperature control 
dial (passenger 
side): Moving 
towards COLD

B+

Wiring harness: 
continuity, short circuit 
(Front climate control 
unit-passenger-side 
front air mix actuator: 

Temperature control 

 

2008 Mazda CX-9 Grand Touring 

2008 HVAC Control System (HVAC) - Mazda CX-9

  

Microsoft 

 

Sunday, November 15, 2009 10:12:36 AM

Page 35 

© 2005 Mitchell Repair Information Company, LLC. 

dial (passenger 
side): Moving 
towards HOT

1.0 or 
less

1C-G, 1E-F)  

Passenger-side front 
air mix actuator  

1D

Seat warmer 
(LH) on/off

Seat warmer relay

Seat warmer switch 
off

B+

Wiring harness: 
continuity, short circuit 
(Front climate control 
unit-seat warmer (LH) 
relay (relay block): 
1D-A)  

Seat warmer (LH) 
relay  

Seat warmer switch 
on

1.0 or 
less

1E

Motor 
operation

Passenger-side 
front air mix 
actuator

Temperature control 
dial (passenger 
side): Moving 
towards COLD

1.0 or 

less

Wiring harness: 
continuity, short circuit 
(Front climate control 
unit-passenger-side 
front air mix actuator: 
1C-G, 1E-F)  

Passenger-side front 
air mix actuator  

Temperature control 
dial (passenger 
side): Moving 
towards HOT

B+

1F

Motor 
operation

Driver-side front 
air mix actuator

Temperature control 
dial (driver side): 
Moving towards 
COLD

B+

Wiring harness: 
continuity, short circuit 
(Front climate control 
unit-driver-side front 
air mix actuator: 1A-G, 
1F-F)  

Driver-side front air 
mix actuator  

Temperature control 
dial (driver-side): 
Moving towards 
HOT

1.0 or 
less

1G

Motor 
operation

Rear air mix 
actuator

Temperature control 
dial (rear side): 
Moving towards 
COLD

B+

Wiring harness: 
continuity, short circuit 
(Front climate control 
unit-Rear air mix 
actuator: 1G-F, 1I-G)  

Rear air mix actuator  

Temperature control 
dial (rear side): 
Moving towards 
HOT

1.0 or 
less

1H

Motor 
operation

Front airflow 
mode actuator

Defroster switch on

1.0 or 

less

Wiring harness: 
continuity, short circuit 
(Front climate control 
unit-front airflow 
mode actuator: 1H-G, 
1J-F)  

Front airflow mode 
actuator  

Mode switch: 
Moving towards 
VENT

B+

Temperature control 

 

2008 Mazda CX-9 Grand Touring 

2008 HVAC Control System (HVAC) - Mazda CX-9

  

Microsoft 

 

Sunday, November 15, 2009 10:12:36 AM

Page 36 

© 2005 Mitchell Repair Information Company, LLC. 

1I

Motor 
operation

Rear air mix 
actuator

dial (rear side): 
Moving towards 
COLD

1.0 or 

less

Wiring harness: 
continuity, short circuit 
(Front climate control 
unit-Rear air mix 
actuator: 1G-F, 1I-G)  

Rear air mix actuator  

Temperature control 
dial (rear side): 
Moving towards 
HOT

B+

1J

Motor 
operation

Front airflow 
mode actuator

Defroster switch on

B+

Wiring harness: 
continuity, short circuit 
(Front climate control 
unit-front airflow 
mode actuator: 1H-G, 
U-F)  

Front airflow mode 
actuator  

Mode switch: 
Moving towards 
VENT

1.0 or 
less

1K

Seat warmer 
(RH) on/off

Seat warmer relay

Seat warmer switch 
off

B+

Wiring harness: 
continuity, short circuit 
(Front climate control 
unit-seat warmer (RH) 
relay (main fuse 
block): 1K-A)  

Seat warmer (RH) 
relay  

Seat warmer switch 
on

1.0 or 
less

1L

Motor 
operation

Rear airflow mode 
actuator

Temperature control 
dial (rear side): 
Moving towards 
HOT

B+

Wiring harness: 
continuity, short circuit 
(Front climate control 
unit-Rear airflow mode 
actuator: 1L-G, 1N-F)  

Rear airflow mode 
actuator  

Temperature control 
dial (rear side): 
Moving towards 
COLD

1.0 or 
less

1M

Motor 
operation

Air intake actuator

REC switch: 
Switched to 
RECIRCULATE

B+

Wiring harness: 
continuity, short circuit 
(Front climate control 
unit-air intake actuator: 
1M-A, 10-C)  

Air intake actuator  

REC switch: 
Switched to FRESH

1.0 or 
less

1N

Motor 
operation

Rear airflow mode 
actuator

Temperature control 
dial (rear side): 
Moving towards 
HOT

1.0 or 

less

Wiring harness: 
continuity, short circuit 
(Front climate control 
unit-Rear airflow mode 
actuator: 1L-G, 1N-F)  

Rear airflow mode 
actuator  

Temperature control 
dial (rear side): 
Moving towards 

B+

 

2008 Mazda CX-9 Grand Touring 

2008 HVAC Control System (HVAC) - Mazda CX-9

  

Microsoft 

 

Sunday, November 15, 2009 10:12:36 AM

Page 37 

© 2005 Mitchell Repair Information Company, LLC. 

 

 

 

 

 

 

 

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