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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