Mazda CX-9 Grand Touring. Manual — part 444

compressor oil.



Is noise heard when racing engine?

Explain repair to customer.

11

CHECK TO SEE WHETHER
MALFUNCTION IS IN A/C
COMPRESSOR OR ELSEWHERE



Drain compressor oil.



Is it contaminated with metal
particles?

Yes Go to the next step.

No

Replace A/C compressor, then go to Step 19.

12

CHECK TO SEE WHETHER
MALFUNCTION IS SOMEWHERE IN
A/C SYSTEM OR ELSEWHERE



Is compressor oil whitish and mixed
with water?

Yes

Replace entire A/C system (excluding heater),
then go to Step 19.

No

Go to the next step.

13

INSPECT A/C COMPRESSOR OIL



Is compressor oil darker than normal
and contaminated with aluminum
chips?

Yes

Replace A/C compressor and condenser, then go
to Step 19. (Since A/C compressor may be worn
and receiver/drier may be clogged, replacement
of receiver/drier is necessary.)

No

Condition is normal. Recheck malfunction

symptoms.

14

CHECK TO SEE WHETHER
MALFUNCTION IS IN A/C
COMPRESSOR OR ELSEWHERE



Is noise heard immediately after A/C
compressor is stopped?

Yes

Replace A/C compressor, then go to Step 19.
(A/C compressor discharge valve left open)

No

Go to the next step.

15

INSPECT DRIVE BELT



Inspect drive belt.

(See DRIVE BELT INSPECTION
[MZI-3.7] .)



Is it okay?

Yes Go to the next step.

No

Adjust or replace drive belt, then go to Step 19.

16

INSPECT DRIVE BELT CONDITION



Is drive belt worn?



Does it have foreign material
imbedded in it, or have oil on it?

Yes

Remove obstruction, remove oil, or replace drive
belt, then go to Step 19.

No

Go to the next step.

17

INSPECT MAGNETIC CLUTCH



Inspect magnetic clutch.

(See MAGNETIC CLUTCH

Yes

Replace A/C compressor (excluding pressure
plate, A/C compressor pulley, and stator), then go
to Step 19.

2008 Mazda CX-9 Grand Touring

2008 HVAC Symptom Troubleshooting (HVAC) - Mazda CX-9

Microsoft

Sunday, November 15, 2009 10:14:51 AM

Page 32

© 2005 Mitchell Repair Information Company, LLC.

NO.11 DUAL A/C CONTROL DOES NOT OPERATE

NO.11 DUAL A/C CONTROL DOES NOT OPERATE DESCRIPTION AND POSSIBLE CAUSE

DIAGNOSTIC PROCEDURE

INSPECTION .)



Is it okay?

No

Replace magnetic clutch, then go to Step 19.

18

CHECK TO SEE WHETHER
MALFUNCTION IS IN A/C
COMPRESSOR OR REFRIGERANT
LINES



Is noise emitted from A/C
compressor?

Yes

Visually inspect A/C compressor, replace
appropriate parts if necessary, then go to the next
step.

No

If noise is due to refrigerant lines, repair detached

or missing clips, tighten loose bolts, then go to

the next step.

19

VERIFY THAT MALFUNCTION
SYMPTOM OCCURS AFTER REPAIR



Has A/C compressor noise stopped?

Yes

Troubleshooting completed.
Explain repairs to customer.

No

Recheck malfunction symptoms, then repeat from

Step 1 if malfunction recurs.

(1)

If there is gas leakage, air enters into the A/C system. The desiccant within the receiver/drier absorbs
the moisture from the air and becomes saturated. If the A/C system is used in this condition, the
inside of the A/C compressor will begin to rust due to this moisture, which may cause lock up or
noise to occur. Therefore, replacement of the receiver/drier is necessary.

11

Dual A/C control function does not operate

DESCRIPTION



Driver or passenger-side temperature control does not operate individually

POSSIBLE

CAUSE



Driver-side air mix door malfunction (stuck)



Passenger-side air mix door malfunction (stuck)



driver-side front air mix actuator malfunction



Passenger-side front air mix actuator malfunction



Driver-side front air mix actuator position sensor malfunction



Passenger-side front air mix actuator position sensor malfunction



Open, short circuit in wiring or poor connection between front climate control
unit and driver-side front air mix actuator



Open, short circuit in wiring or poor connection between front climate control
unit and passenger-side front air mix actuator



Open, short circuit in wiring or poor connection between front climate control
unit and driver-side front air mix actuator position sensor



Open, short circuit in wiring or poor connection between front climate control
unit and passenger-side front air mix actuator position sensor



Front climate control unit malfunction

2008 Mazda CX-9 Grand Touring

2008 HVAC Symptom Troubleshooting (HVAC) - Mazda CX-9

Microsoft

Sunday, November 15, 2009 10:14:51 AM

Page 33

© 2005 Mitchell Repair Information Company, LLC.

NO.11 DUAL A/C CONTROL DOES NOT OPERATE DIAGNOSTIC PROCEDURE

STEP

INSPECTION

ACTION

1

CHECK SYMPTOM



Turn on the front A/C.



Perform the dual A/C control function for driver and
passenger-side individually.



Is it either of cannot the temperature control on driver seat
side or front passenger seat side?

Yes Go to the next step.

No

Go to Step 8.

2

INSPECT TO SEE WHETHER MALFUNCTION IS IN AIR
MIX DOOR OR ELSEWHERE



Turn on the front A/C



Change temperature control for suspect side seat at the dual
mode.



Does the suspect side air mix door move smoothly?

Yes Go to the next step.

No

Go to Step 6.

3

INSPECT AIR MIX DOOR



Inspect the suspect side air mix door.



Is the fan free of interfere with the suspect side A/C
unit case?



Is the fan free of foreign material and obstruction?



Is the air mix door normal?

Yes Go to the next step.

No

Remove the obstruction or

replace the suspect side

A/C unit case, then go to

Step 9.

4

INSPECT FRONT AIR MIX ACTUATOR



Inspect the suspect side front air mix actuator.



Is the front air mix actuator normal?

Yes Go to the next step.

No

Replace the suspect front

air mix actuator, then go to

Step 9.

5

INSPECT TO SEE WHETHER MALFUNCTION IS IN
WIRING HARNESS (OPEN, SHORT OR POOR
CONNECTION OF TERMINALS BETWEEN AIR MIX
ACTUATOR AND FRONT CLIMATE CONTROL UNIT)
OR ELSEWHERE



Inspect for open, short or poor connection of terminals
between the suspect front air mix actuator and front climate
control unit.



Terminal 1A (front climate control unit)- terminal G
(driver-side front air mix actuator)



Terminal 1F (front climate control unit)- terminal F
(driver-side front air mix actuator)



Terminal 1E (front climate control unit)- terminal F
(passenger-side front air mix actuator)



Terminal 1C (front climate control unit)- terminal G

Yes

Repair or replace
malfunction part, then go
to Step 9.

No

Replace the front climate

control unit, then go to

Step 9.

2008 Mazda CX-9 Grand Touring

2008 HVAC Symptom Troubleshooting (HVAC) - Mazda CX-9

Microsoft

Sunday, November 15, 2009 10:14:51 AM

Page 34

© 2005 Mitchell Repair Information Company, LLC.

(passenger-side front air mix actuator)



Is there any open, short or poor connection of terminals?

6*

INSPECT FRONT AIR MIX ACTUATOR POSITION
SENSOR



Inspect the suspect side front air mix actuator position
sensor.



Is the front air mix actuator position sensor normal?

Yes Go to the next step.

No

Replace the suspect front

air mix actuator position

sensor, then go to Step 9.

7

INSPECT TO SEE WHETHER MALFUNCTION IS IN
WIRING HARNESS (OPEN, SHORT OR POOR
CONNECTION OF TERMINALS BETWEEN AIR MIX
ACTUATOR POSITION SENSOR AND FRONT CLIMATE
CONTROL UNIT) OR ELSEWHERE



Inspect for open, short or poor connection of terminals
between the suspect front air mix actuator position sensor
and front climate control unit.



Terminal 2F (front climate control unit)- terminal E
(driver-side front air mix actuator position sensor)



Terminal 2G (front climate control unit)- terminal E
(passenger-side front air mix actuator position sensor)



Terminal 2B (front climate control unit)- terminal A
(each side front air mix actuator position sensor)



Terminal 2P (front climate control unit)- terminal C
(each side front air mix actuator position sensor)



Is there any open, short or poor connection of terminals?

Yes

Repair or replace
malfunction part, then go
to Step 9.

No

Replace the front climate

control unit, then go to

Step 9.

8

INSPECT TO SEE WHETHER MALFUNCTION IS IN
WIRING HARNESS (OPEN, SHORT OR POOR
CONNECTION OF TERMINALS BETWEEN FRONT
CLIMATE CONTROL UNIT AND AIR MIX ACTUATOR
POSITION SENSOR) OR ELSEWHERE



Inspect for open, short or poor connection of terminals
between the front climate control unit and front air mix
actuator position sensor.



Terminal 2B (front climate control unit)- terminal A
(each front air mix actuator position sensor)



Terminal 2P (front climate control unit)- terminal C
(each front air mix actuator position sensor)



Is there any open, short or poor connection of terminals?

Yes

Repair or replace
malfunction part, then go
to the next step.

No

Replace the front climate

control unit, then go to the

step.

9

CONFIRM THAT MALFUNCTION SYMPTOMS DOES
NOT RECUR AFTER REPAIR

Yes

Troubleshooting
completed. Explain repairs
to customer.

Recheck malfunction

2008 Mazda CX-9 Grand Touring

2008 HVAC Symptom Troubleshooting (HVAC) - Mazda CX-9

Microsoft

Sunday, November 15, 2009 10:14:51 AM

Page 35

© 2005 Mitchell Repair Information Company, LLC.