Mazda CX 7. Manual - part 370

 

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Mazda CX 7. Manual - part 370

 

 

SYMPTOM TROUBLESHOOTING [CAR-NAVIGATION SYSTEM]

09-03H–1

09-03H

09-03H SYMPTOM TROUBLESHOOTING [CAR-
NAVIGATION SYSTEM]

CAR-NAVIGATION SYSTEM

[CAR-NAVIGATION SYSTEM]  . . . . . . .  09-03H–1

Troubleshooting Index  . . . . . . . . . . . . .  09-03H–1
Quick Diagnostic Chart  . . . . . . . . . . . .  09-03H–2

NO.1 DISPLAY SCREEN CHANGES 

TO BLACK.
[CAR-NAVIGATION SYSTEM]  . . . . . . .  09-03H–3

NO.2 DISPLAY SCREEN CHANGES 

TO WHITE.
[CAR-NAVIGATION SYSTEM]  . . . . . . .  09-03H–5

NO.3 SYSTEM DOES NOT LOAD 

THE MAP DISC.
[CAR-NAVIGATION SYSTEM]  . . . . . . .  09-03H–5

NO.4 VEHICLE POSITION DEVIATES 

FROM THE ROUTE MAP.
[CAR-NAVIGATION SYSTEM]  . . . . . . .  09-03H–6

NO.5 NO VOICE NAVIGATION

[CAR-NAVIGATION SYSTEM]  . . . . . . .  09-03H–7

NO.6 DISPLAY SCREEN DOES NOT 

CHANGE TO THE NIGHT MODE. 
(FRONT AND REAR COMBINATION 
LIGHTS OPERATE NORMALLY.)
[CAR-NAVIGATION SYSTEM] . . . . . . . . 09-03H–9

NO.7 DISPLAY DOES NOT CHANGE TO 

THE BACK CAMERA IMAGE.
[CAR-NAVIGATION SYSTEM] . . . . . . . . 09-03H–10

NO.8 SPEECH RECOGNITION 

DOES NOT START
[CAR-NAVIGATION SYSTEM] . . . . . . . . 09-03H–11

REFERENCE INFORMATION

[CAR-NAVIGATION SYSTEM] . . . . . . . . 09-03H–12

Starting Procedure For 

Diagnostic Function. . . . . . . . . . . . . . . 09-03H–12

Finishing Procedure For 

Diagnostic Function. . . . . . . . . . . . . . . 09-03H–13

End of Toc

WM: CAR-NAVIGATION SYSTEM

CAR-NAVIGATION SYSTEM[CAR-NAVIGATION SYSTEM]

id0903e8801600

Troubleshooting Index

• Use the chart below and verify the trouble in order to diagnose the appropriate area.

No.

Malfunction symptom

1

Display screen changes to black.

2

Display screen changes to white.

3

System does not load map disc.

4

Vehicle position deviates from the route map.

5

No voice navigation

6

Display screen does not change to the night mode.
(Front and rear combination lights operate normally.)

7

Display does not change to the back camera image.

8

Speech recognition does not start.

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SYMPTOM TROUBLESHOOTING [CAR-NAVIGATION SYSTEM]

09-03H–2

Quick Diagnostic Chart

End Of Sie

Open or short circuit in power supply (B+) wiring harness, or burnt fuse

Open or short circuit in power supply (ACC) wiring harness, or burnt fuse

Open or short circuit in GND wiring harness

Open or short circuit in vehicle speed signal wiring harness

Open or short circuit in remote control signal wiring harness

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

Audio unit malfunction

Car-navigation unit malfunction

Poor connection of audio unit connector, terminal damage

Poor connection of car-navigation unit connector, terminal damage

Map disc malfunction

Moisture inside of car-navigation unit

Non-designated disc inserted

Improper adjustment of screen contrast

GPS antenna malfunction

Jammed radio signals from after market equipment

Improper adjustment of NAVI voice volume

Car-navigation control switch malfunction

Driver-side front door speaker malfunction

Poor connection of GPS antenna connector, terminal damage

Poor connection of car-navigation control switch connector, terminal damage

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

Open or short circuit in TNS signal wiring harness

Improper setting of NAVI map indication

Possible factor

Troubleshooting item

1

Displa

y screen changes to b

lac

k.

2

Displa

y screen changes to white

.

3

System does not load the map disc.

4

V

ehicle position de

viates from the route map

.

5

6

No v

oice na

vigation.

7

Displa

y screen does not change to the night mode

.

8

Displa

y does not change to the bac

k camer

a image

.

Speech recognition does not star

t.

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x
x
x

x
x
x
x

x
x
x
x

x
x

x
x
x
x

x
x
x

Microphone unit

Poor connection of back camera connector, terminal damage

Open or short circuit in reverse signal wiring harness

Back camera malfunction

Open or short circuit in wiring harness between back camera and rear audio unit

Open or short circuit in wiring harness between audio unit and car-navigation unit

Audio control switch malfunction

X: Applicable

Poor connection of audio amplifier connector, terminal damage

x

x
x
x

acxuuw00000878

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SYMPTOM TROUBLESHOOTING [CAR-NAVIGATION SYSTEM]

09-03H–3

09-03H

NO.1 DISPLAY SCREEN CHANGES TO BLACK.[CAR-NAVIGATION SYSTEM]

id0903e8811800

Diagnostic procedure

1

Display screen changes to black.

POSSIBLE CAUSE

• Open or short circuit in car-navigation unit (power supply (B+)) wiring harness

• Open or short circuit in car-navigation unit (power supply (ACC)) wiring harness

• Open or short circuit in car-navigation unit (GND) wiring harness

• Open or short circuit in wiring harness between audio unit and car-navigation unit

• Poor connection of rear view monitor control module connector, terminal damage

• Open or short circuit in audio unit (power supply (B+)) wiring harness

• Open or short circuit in audio unit (power supply (ACC)) wiring harness

• Open or short circuit in audio unit (power supply (IG1)) wiring harness

• Open or short circuit in audio unit (GND) wiring harness

• Open or short circuit in wiring harness between audio unit and rear view monitor

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

• Poor connection of audio unit connector, terminal damage

• Car-navigation unit malfunction

• audio unit malfunction

STEP

INSPECTION

ACTION

1

• Turn the ignition switch to the ACC position.

• Does the display screen change from blank 

to NAVI mode when pressing the joystick of 
the car-navigation control switch?

Yes

The system is normal.

Note

• If the “VOICE” button is pressed for approx. 2 s or 

more, the “DISP OFF” menu appears on the bottom-
left side of screen. If “DISP OFF” mode is selected, 
the audio unit will not display anything. “DISP OFF” 
mode is cancelled when the ignition switch is turned 
to the LOCK position or the joystick of the car-
navigation control switch is pressed.

No

Go to the next step.

2

• Shift the selector lever in R range.

• Does it change to rear view screen?

Yes

Go to the next step.

No

Go to the 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.

8

• Disconnect the audio unit connector (24-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?

Yes

Go to the next step.

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.

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SYMPTOM TROUBLESHOOTING [CAR-NAVIGATION SYSTEM]

09-03H–4

End Of Sie

9

• Inspect the following wiring harnesses 

between the audio unit and car-navigation 
unit.
— Terminal I (24-pin, UART-2)— terminal N 

(24-pin, UART-2)

— Terminal E (24-pin, UART-1)— terminal P 

(24-pin, UART-1)

• Is there open or short circuit?

Yes

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 rear view monitor (4-pin).

• Is the rear view monitor connector connected 

securely?

Yes

Go to the next step.

No

Securely connect the rear view monitor.

12

• Disconnect the rear view monitor connector 

(4-pin).

• Inspect both rear view monitor 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 view monitor 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.

14

• Disconnect the audio unit 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?

Yes

Go to the next step.

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 view monitor 

and audio unit at harness-side connector.
— Rear view monitor terminal A (4-pin, 

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

— Rear view monitor terminal B (4-pin, P-

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

— Rear view monitor terminal C (4-pin, V-

GND) and audio unit terminal D (4-pin, V-
GND)

— Rear view monitor terminal D (4-pin, 

CONPOSIDE) and audio unit terminal C 
(4-pin, CONPOSIDE)

•  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.

STEP

INSPECTION

ACTION

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