NO.7 DISPLAY DOES NOT CHANGE TO THE BACK CAMERA IMAGE. [CAR-
NAVIGATION SYSTEM]
TROUBLESHOOTING CHART
DIAGNOSTIC PROCEDURE
DIAGNOSTIC PROCEDURE
4
UNIT REMOVAL/INSTALLATION
.)
z
Inspect the connection of the audio unit
connector (24-pin).
z
Is the connector securely connected?
No Securely connect the audio unit connector.
5
z
Disconnect the audio unit connector (24-
pin).
z
Inspect both the audio unit and wiring
harness-side connector terminal E for poor
connection (such as damaged/pulled-out
pins, corrosion).
z
Are all the pins normal?
Yes Go to the next step.
No
If the audio unit side connector is wrong:
z
Replace the audio unit. (See
AUDIO
UNIT
REMOVAL/INSTALLATION
.)
If the wiring harness-side connector is
wrong:
z
Repair or replace the pins and/or the
connector.
6
z
Inspect the voltage of the audio unit
wiring harness-side connector (24-pin)
terminal E (TNS signal)
z
Is voltage
B+
when the light switch is
turned to the TNS position?
Yes
Replace the audio unit, then go to the next
step. (See
AUDIO UNIT
REMOVAL/INSTALLATION
.)
No
Inspect for TNS signal circuit. Repair or
replace if necessary.
7
z
Does system work properly?
Yes Troubleshooting is completed.
No
Replace the car-navigation unit.
7
Display does not change to the back camera image
POSSIBLE
CAUSE
z
Back camera malfunction
z
Poor connection of the back camera connector, terminal damage
z
Audio unit malfunction
z
Poor connection of the audio unit connector, terminal damage
z
Open or short circuit in wiring harness between audio unit and rear view
monitor
z
Open or short circuit in reverse signal wiring harness
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 10:40:44 AM
Page 15
© 2005 Mitchell Repair Information Company, LLC.
