Mazda CX 7. Manual - part 371

SYMPTOM TROUBLESHOOTING [CAR-NAVIGATION SYSTEM]

09-03H–5

09-03H

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

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Diagnostic procedure

End Of Sie

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

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Diagnostic procedure

End Of Sie

2

Display screen changes to white.

POSSIBLE CAUSE

• Car-navigation unit malfunction

• audio unit malfunction

• Improper adjustment of the screen contrast

STEP

INSPECTION

ACTION

1

• Turn the ignition switch to the ACC position.

• Shift the selector lever in R range.

• 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

1

• Eject the map disc.

• Is the map okay?

Yes

Go to the next step.

No

Insert a designated disc, then go to the next step.

2

• Eject the map disc then insert the map disc 

again.

• Does the system load the map disc?

Yes

Trouble shooting is completed.

No

Go to the next step.

3

• Eject the map disc and clean the surface of 

map disc with a soft cloth.

• Insert map disc again.

• Does the “Cannot Read Disc” error message 

show up on the screen?

Yes

Trouble shooting is completed.

No

Replace car-navigation unit and map disc at the same time. 
(consult distributor) (See 09-20-5 CAR-NAVIGATION UNIT 
REMOVAL/INSTALLATION.)

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SYMPTOM TROUBLESHOOTING [CAR-NAVIGATION SYSTEM]

09-03H–6

NO.4 VEHICLE POSITION DEVIATES FROM THE ROUTE MAP.[CAR-NAVIGATION SYSTEM]

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Diagnostic procedure

4

Vehicle position deviates from the route map.

POSSIBLE CAUSE

• Jammed radio signals from after market equipment (radar, remote engine starter, anti-theft device 

etc.)

• Open or short circuit in the wiring harness (vehicle speed signal related).

• Car-navigation unit malfunction.

• Poor connection of the GPS antenna connector, terminal damage

• GPS antenna malfunction.

• Open or short circuit in feeder line between GPS antenna feeder and car-navigation unit.

STEP

INSPECTION

ACTION

1

• Is any of the following after-market 

equipment installed? (Inspect especially near 
the GPS antenna.)
— Radar

— Remote engine starter

— Anti-theft device.

— Other

Yes

Go to the next step.

No

Go to Step 3.

2

• Remove the after-market equipment.

Note

• The procedure requires an assistant.

• Drive the vehicle without any obstacles.

• Does the vehicle indicator follow the steering 

wheel direction?

Yes

System is normal. The after-market electrical device might 
be interrupting to the GPS reception.

No

Go to the next step.

3

• Position the vehicle without any obstacles 

and receive GPS for 5 min at idle.

• Does “GPS” show up on the left lower side of 

the display screen?

Yes

Go to the next step.

No

Go to Step 8.

4

Caution

• This procedure requires an assistant.

• Start the diagnostic function.

• Drive the vehicle.

• Check the “Speed” on the diagnosis screen.

• Does the “Speed” change according to the 

vehicle speed?

Note

• If the engine is started after diagnostic 

functions activated, the diagnostic 
function mode is reset.

Yes

Go to the next step.

No

Go to Step 6.

5

Caution

• This procedure requires an assistant.

• Drive the vehicle and turn the steering wheel 

to the left and/or right.

• Does the vehicle indicator follow the steering 

direction?

Yes

The system is normal.

Note

• The vehicle indicator might be out of position in the 

following areas:

— Parallel road, high-level road, loop road, tower type 

parking, high-rise buildings lot

No

Replace the car-navigation unit. (See 09-20-5 CAR-
NAVIGATION UNIT REMOVAL/INSTALLATION.)

6

• Turn the ignition switch to the LOCK position.

• Remove the car-navigation unit. (See 09-20-

5 CAR-NAVIGATION UNIT REMOVAL/
INSTALLATION.)

• Inspect the connection of the car-navigation 

unit connector (16-pin).

• Is the connector securely connected?

Yes

Go to the next step.

No

Securely connect the car-navigation unit connector.

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SYMPTOM TROUBLESHOOTING [CAR-NAVIGATION SYSTEM]

09-03H–7

09-03H

End Of Sie

NO.5 NO VOICE NAVIGATION[CAR-NAVIGATION SYSTEM]

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Diagnostic procedure

7

• Disconnect the car-navigation unit connector 

(16-pin).

• Inspect both car-navigation unit connector 

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

• Are all the pins normal?

Yes

Inspect for vehicle speed signal input circuit.
Repair or replace if necessary.

No

If the car-navigation unit connector is wrong:

• Replace the car-navigation unit. (See 09-20-5 CAR-

NAVIGATION UNIT REMOVAL/INSTALLATION.)

If the wiring harness-side connector is wrong:

• Repair or replace the pins and/or the connector.

8

Note

• If the engine is started after diagnostic 

functions activated, the diagnostic 
function mode is reset.

• Turn the ignition switch to ON position.

• Start the diagnostic function.

• Inspect the “GPS antenna” on diagnosis 

screen.

• Is the “OK” indicated?

Yes

Go to the next step.

No

Go to the Step 6.

9

• Turn the ignition switch to the LOCK position.

• Remove the car-navigation unit. (See 09-20-

5 CAR-NAVIGATION UNIT REMOVAL/
INSTALLATION.)

• Inspect the connection of the car-navigation 

unit connector and GPS antenna connector.

• Is the connector securely connected?

Yes

Go to the next step.

No

Securely connect the GPS antenna connector.

10

• Disconnect the GPS antenna connector.

• Inspect both GPS antenna connector and 

car-navigation unit connector for poor 
connection (such as damaged/pulled-out 
pins, corrosion).

• Are all the pins normal?

Yes

Replace the car-navigation unit. (See 09-20-5 CAR-
NAVIGATION UNIT REMOVAL/INSTALLATION.)

No

If the wiring harness-side connector is wrong:

• Repair or replace the suspect wiring harness.

If the car-navigation unit side connector is wrong:

• Replace the car-navigation unit. (See 09-20-5 CAR-

NAVIGATION UNIT REMOVAL/INSTALLATION.)

STEP

INSPECTION

ACTION

5

No voice navigation

POSSIBLE CAUSE

• Improper adjustment of the NAVI voice volume

• Car-navigation unit malfunction

• Poor connection of the driver-side front door speaker connector, terminal damage

• Driver-side front door speaker malfunction

• Poor connection of the car-navigation unit connector, terminal damage

• Open or short circuit in driver-side front door speaker wiring harness

• Poor connection of the audio amplifier connector, terminal damage

STEP

INSPECTION

ACTION

1

• Is the voice navigation volume from “1” 

ton“7”?

Yes

Go to the next step.

No

Adjust the volume from “1” to “7”.

2

• Turn the audio power switch (CD, MD, radio) 

to ON.

• Does the driver-side front door speaker 

work?

Yes

Replace the car-navigation unit. (See 09-20-5 CAR-
NAVIGATION UNIT REMOVAL/INSTALLATION.)

No

Go to the next step.

3

• Turn the ignition switch to the LOCK position.

• Remove the driver-side front door speaker. 

(See 09-20-6 FRONT DOOR SPEAKER 
REMOVAL/INSTALLATION.)

• Inspect the connection of the driver-side front 

door speaker connector (2-pin).

• Is the connector securely connected?

Yes

Go to the next step.

No

Securely connect the driver-side front door speaker 
connector.

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SYMPTOM TROUBLESHOOTING [CAR-NAVIGATION SYSTEM]

09-03H–8

End Of Sie

4

• Disconnect the driver-side front door speaker 

connector (2-pin).

• Inspect both the driver-side front door 

speaker 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 driver-side front door speaker side 

connector is wrong:

• Replace the driver-side front door speaker. (See 09-20-6 

FRONT DOOR SPEAKER REMOVAL/INSTALLATION.)

If the wiring harness-side connector is wrong:

• Repair or replace the pins and/or the connector.

5

• Remove the car-navigation unit. (See 09-20-

5 CAR-NAVIGATION UNIT REMOVAL/
INSTALLATION.)

• Inspect the connection of the car-navigation 

unit connector (16-pin).

• Is the connector securely connected?

Yes

Go to the next step.

No

Securely connect the car-navigation unit connector.

6

• Disconnect the car-navigation unit connector 

(16-pin).

• Inspect both the car-navigation unit and 

wiring harness-side connector terminal F, I 
and K 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 side connector is wrong:

• Replace the car-navigation unit. (See 09-20-5 CAR-

NAVIGATION UNIT REMOVAL/INSTALLATION.)

If the wiring harness-side connector is wrong:

• Repair or replace the pins and/or the connector.

7

• Remove the audio amplifier.

• Inspect connection of the audio amplifier 

connector (40-pin).

•  Is the connector securely connected?

Yes

Go to the next step.

No

Securely connect the audio amplifier.

8

• Disconnect the audio amplifier connector 

(40-pin).

• Inspect the audio amplifier and wiring 

harness connector terminal 3B, 3G and 3H 
for poor connection (such as damaged/
pulled-out pins, corrosion).

• Are all the pins normal?

Yes

Go to the next step.

No

If the audio amplifier side connector is wrong:

• Replace the audio amplifier.

Replace the audio amplifier.

• Repair or replace the pins and/or the connector.

9

• Inspect the continuity between following car-

navigation unit and audio amplifier at 
harness-side connector.
— Car-navigation unit terminal F (16-pin, 

MUTE) and audio amplifier terminal 3B 
(40-pin, NAVI INT)

— Car-navigation unit terminal I (16-pin, 

PRE SP OUT+) and audio amplifier 
terminal 3G (40-pin, NAVI-) 

— Car-navigation unit terminal K (16-pin, 

PRE SP OUT-) and audio amplifier 
terminal 3H (40-pin, NAVI+) 

• 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, go to the next step.

No

Repair or replace the wiring harness.

10

• Inspect for continuity between audio amplifier 

and the driver-side front door speaker.

• Is there continuity?

Yes

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

No

Repair or replace the wiring harness.

11

• Inspect the driver-side front door speaker. 

(See 09-20-7 FRONT DOOR SPEAKER 
INSPECTION.)

• Is it normal?

Yes

Replace the car-navigation unit. (See 09-20-5 CAR-
NAVIGATION UNIT REMOVAL/INSTALLATION.)

No

Replace the driver-side front door speaker. (See 09-20-6 
FRONT DOOR SPEAKER REMOVAL/INSTALLATION.)

STEP

INSPECTION

ACTION

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