Navigation System Symptom Troubleshooting - Voice guidance cannot be heard, is broken up, or there is static
Voice guidance cannot be heard, is broken up, or there is static
NOTE:
Check the vehicle 12 volt battery condition first.
Check the volume and voice feedback setting for the navigation system in set-up.
Check the connectors for poor connections or loose terminals.
1.
Problem verification:

Problem verification
?1.
Check the navigation voice guidance output.

Does the system output the voice guidance?

     
YES
     
     
     
Intermittent failure, the system is OK at this time.?
     
NO
     
     
     
The failure is duplicated, go to step 2.
2.
Determine possible failure area (voice guidance output circuit, others):

Determine possible failure area (voice guidance output circuit, others)
?1.
Go into the System Diagnostic Mode, and use the speaker check mode.

Did all speakers produce a tone?

     
YES
     
     
     
Go to step 3.
     
NO: The sound is cannot be heard in all speakers
     
     
     
     
NO: The sound is cannot be heard in front center speaker
     
     
     
3.
Shorted wire check (AUX NAVI line, AUX NAVI GND line):

Shorted wire check (AUX NAVI line, AUX NAVI GND line)
?1.
Turn the vehicle to the OFF (LOCK) mode.

?2.
Disconnect the following connectors.
Audio-navigation unit connector B (24P)
Stereo amplifier connector C (16P)

?3.
Check for continuity between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
 
Audio-navigation unit connector B (24P): disconnected
 
Stereo amplifier connector C (16P): disconnected
Test point 1
Audio-navigation unit connector B (24P) No. 13
Test point 2
Body ground

Test point 1
Audio-navigation unit connector B (24P) No. 14
Test point 2
Body ground

Is there continuity?

     
YES
     
     
     
There is a short to body ground in the wire between the audio-navigation unit and the stereo amplifier. Replace the affected shielded harness.?
     
NO
     
     
     
The AUX NAVI and the AUX NAVI GND wires are not shorted to ground. Go to step 4.
4.
Shorted wire check (AUX lines):

Shorted wire check (AUX lines)
?1.
Check for continuity between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
 
Audio-navigation unit connector B (24P): disconnected
 
Stereo amplifier connector C (16P): disconnected

Test point 1:
Audio-navigation unit connector B (24P)
Test points 2:
Audio-navigation unit connector B (24P)
No. 1
No. 2, No. 13, No. 14
No. 2
No. 13, No. 14
No. 13
No. 14

Is there continuity between any of the terminals?

     
YES
     
     
     
There is a short in the wires between the audio-navigation unit and the stereo amplifier. Replace the affected shielded harness.?
     
NO
     
     
     
The AUX wires are not shorted in the wires. Go to step 5.
5.
Open wire check (AUX NAVI line, AUX NAVI GND line):

Open wire check (AUX NAVI line, AUX NAVI GND line)
?1.
Check for continuity between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
 
Audio-navigation unit connector B (24P): disconnected
 
Stereo amplifier connector C (16P): disconnected
Test point 1
Audio-navigation unit connector B (24P) No. 13
Test point 2
Stereo amplifier connector C (16P) No. 12


Is there continuity?

     
YES
     
     
     
The AUX NAVI and the AUX NAVI GND wires are OK. Go to step 6.
     
NO
     
     
     
There is an open in the wire(s) between the audio-navigation unit and the stereo amplifier. Replace the affected shielded harness.?
6.
Stereo amplifier check (substitution):

Stereo amplifier check (substitution)
?1.
Substitute a known-good stereo amplifier.

?2.
Reconnect all the connectors, and recheck.

Does the symptom go away?

     
YES
     
     
     
Replace the original stereo amplifier.?
     
NO