Mazda CX-9 Grand Touring. Manual - part 522

2



Does it change to rear view 
screen?  

No

Go to Step 11.

3



Turn the ignition switch to the 
LOCK position.  



Remove the car-navigation unit.  



Inspect the car-navigation unit 
connector (24-pin).  



Is the car-navigation unit 
connector connected securely?  

Yes Go to the next step.

No

Securely connect the car-navigation unit connector.

4



Disconnect the car-navigation 
unit connector.  



Inspect both car-navigation unit 
connector and wiring harness-
side connector for poor 
connection (such as 
damaged/pulled-out pins, 
corrosion).  



Are all the pins normal?  

Yes Go to the next step.

No

If the car-navigation unit connector is wrong:  



Replace the car-navigation unit.  

 

If the wiring harness-side connector is wrong:  



Repair or replace the pins and/or the connector. 

5



Inspect the voltage between the 
car-navigation unit wiring 
harness-side connector (16-pin) 
terminals B (B+) and A (GND).  



Is the voltage B+?  

Yes Go to the next step.

No

Inspect the suspect wiring harness and repair or 

replace the wiring harness as necessary.

6



Turn the ignition switch to the 
ACC position.  



Inspect the voltage between the 
car-navigation unit wiring 
harness-side connector (16-pin) 
terminals D (ACC) and A 
(GND).  



Is the voltage B+?  

Yes Go to the next step.

No

Inspect the suspect wiring harness and repair or 

replace the wiring harness as necessary.

7



Turn the ignition switch to the 
LOCK position.  



Remove the audio unit.  



Inspect the audio unit connector 
(24-pin).  



Is the audio unit connector 
connected securely?  

Yes Go to the next step.

No

Securely connect the audio unit connector.



Disconnect the audio unit 
connector (24-pin).  



Inspect both audio unit connector 

Yes Go to the next step.

If the audio unit connector is wrong:  

 

2008 Mazda CX-9 Grand Touring 

2008 BODY & ACCESSORIES Symptom Troubleshooting (Car Navigation System) - Mazda CX-9

  

Microsoft 

 

Sunday, November 15, 2009 10:40:43 AM

Page 4 

© 2005 Mitchell Repair Information Company, LLC. 

8

and wiring harness-side 
connector for poor connection 
(such as damaged/pulled-out 
pins, corrosion).  



Are all the pins normal?  

No



Replace the audio unit.  

 

If the wiring harness-side connector is wrong:  



Repair or replace the pins and/or the connector. 

9



Inspect the continuity between 
the following wiring harness: 



Audio unit terminal I (24-
pin)-car-navigation unit 
terminal N (24-pin)  



Audio unit terminal E (24-
pin)-car-navigation unit 
terminal P (24-pin)  



Is there continuity?  

Yes

Inspect for short circuit in wiring harness. If there is a 
short circuit, repair or replace the suspect wiring 
harness. 
If the wiring harness is okay, replace the audio unit, 
then go to the next step.

No

Repair or replace the suspect wiring harness.

10



Does system work properly?  

Yes Troubleshooting is completed.
No

Replace the car-navigation unit.

11



Turn the ignition switch to the 
LOCK position.  



Remove the rear view monitor.  



Inspect the connection of the rear 
mount camera connector (4-pin). 



Is the rear mount camera 
connector connected securely?  

Yes Go to the next step.

No

Securely connect the rear view monitor.

12



Disconnect the rear mount 
camera connector (4-pin).  



Inspect both rear mount camera 
connector and wiring harness-
side connector for poor 
connection (such as 
damaged/pulled-out pins, 
corrosion).  



Are all the pins normal?  

Yes Go to the next step.

No

If the rear mount camera connector is wrong:  



Replace the rear view monitor.  

 

If the wiring harness-side connector is wrong:  



Repair or replace the pins and/or the connector. 

13



Turn the ignition switch to the 
LOCK position.  



Remove the audio unit.  



Inspect the audio unit connector 
(4-pin).  



Is the audio unit connector 
connected securely?  

Yes Go to the next step.

No

Securely connect the audio unit connector.



Disconnect the audio unit 

Yes Go to the next step.

 

2008 Mazda CX-9 Grand Touring 

2008 BODY & ACCESSORIES Symptom Troubleshooting (Car Navigation System) - Mazda CX-9

  

Microsoft 

 

Sunday, November 15, 2009 10:40:43 AM

Page 5 

© 2005 Mitchell Repair Information Company, LLC. 

NO.2 DISPLAY SCREEN CHANGES TO WHITE. [CAR-NAVIGATION 
SYSTEM] 

TROUBLESHOOTING CHART 

14

connector (4-pin).  



Inspect both audio unit connector 
and wiring harness-side 
connector for poor connection 
(such as damaged/pulled-out 
pins, corrosion).  



Are all the pins normal?  

No

If the audio unit connector is wrong:  



Replace the audio unit.  

 

If the wiring harness-side connector is wrong:  



Repair or replace the pins and/or the connector. 

15



Verify continuity between rear 
mount camera and audio unit at 
harness-side connector. 



Rear mount camera 
terminal A (4-pin, 
POWER) and audio unit 
terminal A (4-pin, 
POWER)  



Rear mount camera 
terminal B (4-pin, P-GND) 
and audio unit terminal B 
(4-pin, P-GND)  



Rear mount camera 
terminal C (4-pin, V-
GND) and audio unit 
terminal D (4-pin, V-
GND)  



Rear mount camera 
terminal D (4-pin, 
CONPOSITE) and audio 
unit terminal C (4-pin, 
CONPOSITE)  



Is there any continuity?  

Yes Go to the next step.

No

Inspect the suspect wiring harness and repair or 

replace the wiring harness as necessary.

16



Does system work properly?  

Yes Troubleshooting is completed.
No

Replace the car-navigation unit.

2

Display screen changes to white.

POSSIBLE CAUSE 



Car-navigation unit malfunction  



Audio unit malfunction  



Improper adjustment of the screen contrast  

 

2008 Mazda CX-9 Grand Touring 

2008 BODY & ACCESSORIES Symptom Troubleshooting (Car Navigation System) - Mazda CX-9

  

Microsoft 

 

Sunday, November 15, 2009 10:40:43 AM

Page 6 

© 2005 Mitchell Repair Information Company, LLC. 

DIAGNOSTIC PROCEDURE 

DIAGNOSTIC PROCEDURE 

NO.3 SYSTEM DOES NOT LOAD THE MAP DISC. [CAR-NAVIGATION 
SYSTEM] 

TROUBLESHOOTING CHART 

DIAGNOSTIC PROCEDURE 

DIAGNOSTIC PROCEDURE 

STEP

INSPECTION

ACTION

1



Turn the ignition switch to the ACC position.  



Shift the selector lever in R position.  



Is the rear view screen normal?  

Yes

Replace the car-navigation 
unit.

No

Go to the next step.

2



Does the display screen change to "display quality 
adjustment" mode when pressing the MODE button for 
approx. 2 s or more?  

Yes Go to the next step.

No

Replace the audio unit.

3



Select "default display" or "display quality adjustment" 
mode in the NAVI mode.  



Press "ENTER" button.  



Does system work properly?  

Yes

Troubleshooting is 
completed.

No

Replace the audio unit, then 

go to the next step.

3

System does not load the map disc.

POSSIBLE 

CAUSE 



Car-navigation unit malfunction  



Map disc malfunction  



Moisture inside of car-navigation unit  



Non-designated disc is inserted 

NOTE:



If dewdrops are formed inside of the car-navigation unit, the display 
screen shows the "The disc installed is not a map DVD" message. Remove 
the map disc, ventilate or remove moisture from the passenger 
compartment, and then leave it for approx. 1 h . The dewdrops will be 
removed and the car-navigation unit will operate normally.  



In case of a dirty/damaged map disc or car-navigation unit malfunction, the 
display screen will show the "Please insert a map DVD" message for few 
seconds to 1 min, then change to "The disc installed is not a map DVD" 
message after the ignition switch is turned to the ACC position.  



If a non-designated disc is inserted, the display screen shows the "The 
disc installed is not a map DVD" message.  

STEP

INSPECTION

ACTION

 

2008 Mazda CX-9 Grand Touring 

2008 BODY & ACCESSORIES Symptom Troubleshooting (Car Navigation System) - Mazda CX-9

  

Microsoft 

 

Sunday, November 15, 2009 10:40:43 AM

Page 7 

© 2005 Mitchell Repair Information Company, LLC.