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Home >> Acura >> 2012 >> TL AWD V6-3.7L >> Repair and Diagnosis >> Accessories and Optional Equipment >> Radio, Stereo, and Compact Disc >> Testing and Inspection >> Symptom Related Diagnostic Procedures >> Symptom Troubleshooting

Symptom Troubleshooting




Audio System Symptom Troubleshooting - No sound is heard from the speaker(s) (display is normal)

No sound is heard from the speaker(s) (display is normal) (with navigation)

NOTE:

- Check the vehicle battery condition first Battery Test.
- Check the connectors for poor connections or loose terminals.
- Set the fader and balance positions to the center.
- Before doing the troubleshooting, do the Audio unit power switch will not turn on (No information display and no sound) troubleshooting Audio Unit Power Switch Will Not Turn On (No Information Display And No Sound) (With Navigation).

1. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.

2. Turn on the audio-navigation unit, and make sure the volume button is not set to the MIN level.

Is it at the MIN level?

YES -

Raise the volume level, and recheck the function.

NO -

Go to step 3.

3. Check for sound in each mode (AM/FM, XM, USB, and CD or DVD).

Is the sound OK in each mode?

YES -

Intermittent failure. The system is OK at this time. Check for loose connections at the audio-navigation unit and speaker(s).

NO -

- If there is no sound in all modes, go to step 4.
- If there is no sound in AM/FM mode, go to AM or FM radio reception interference troubleshooting Symptom Troubleshooting.
- If the sound quality is poor only with XM radio, or the XM radio does not function, go to Poor or no sound with XM radio (Audio unit does display XM channels) troubleshooting; with AcuraLink Poor or No Sound With Xm Radio (Audio Unit Does Display XM Channels) (USA Models With Navigation), without AcuraLink Poor or No Sound With Xm Radio (Audio Unit Does Display XM Channels) (Canada Models With Navigation).
- If sound quality is poor only with USB mode, go to USB input sound is low or cannot be heard troubleshooting Symptom Troubleshooting.
- If there is no sound in CD or DVD mode, do the Audio disc does not play troubleshooting Audio Disc Does Not Play (With Navigation).

4. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.

5. Remove the center console panel Center Console Panel Removal / Installation.

6. Disconnect the HandsFreeLink control unit 32P connector.

7. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode, and recheck the audio system for sound.

Did the sound return?

YES -

Replace the HandsFreeLink control unit HFL Switch Test.

NO -

Go to step 8.

8. Do the Speaker Check Mode with the Self-Diagnostic Function.

Do all speakers produce a tone?

YES -

Substitute a known-good audio-navigation unit (including the HDD) Audio-Navigation Unit Removal/Installation, and recheck. If the symptom/indication goes away, replace the original audio-navigation unit Audio-Navigation Unit Removal/Installation.

NO -

Go to step 9.

9. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.

10. Check the No. 15 (20 A) fuse in the passenger's under-dash fuse/relay box.

Is the fuse OK?

YES -

Go to step 11.

NO -

Replace the fuse, and recheck. If the fuse blows again, check for a short in the No. 15 (20 A) fuse circuit.

11. Measure the voltage between stereo amplifier connector A (18P) terminal No. 18 and body ground.





Is there battery voltage?

YES -

Go to step 12.

NO -

Repair an open in the wire between the No. 15 (20 A) fuse in the passenger's under-dash fuse/relay box and the stereo amplifier.

12. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.

13. Measure the voltage between stereo amplifier connector B (28P) terminal No. 3 and body ground.





Is there battery voltage?

YES -

Go to step 15.

NO -

Go to step 14.

14. Measure the voltage between audio-navigation unit connector A (24P) terminal No. 17 and body ground.





Is there battery voltage?

YES -

Repair an open in the wire between the stereo amplifier and the audio-navigation unit.

NO -

Substitute a known-good audio-navigation unit (including the HDD) Audio-Navigation Unit Removal/Installation, and recheck. If the symptom/indication goes away, replace the original audio-navigation unit Audio-Navigation Unit Removal/Installation.

15. Measure the voltage between body ground and stereo amplifier connector A (18P) terminal No. 9.





Is there less than 0.2 V?

YES -

Go to step 16.

NO -

Repair an open or high resistance in the wire between the stereo amplifier and body ground (G653); with SH-AWD Window Defogger Ground Wire, without SH-AWD Window Defogger Ground Wire.

16. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.

17. Check the faulty speaker(s) for damage.

Is there any damage?

YES -

Replace the speaker Speaker Test/Replacement, and recheck.

NO -

Go to step 18.

18. Remove the speaker(s) with no sound Speaker Test/Replacement, and disconnect its connector.

19. Check for poor connections or loose terminals at speaker 2P connectors.

Are the connections or terminals OK?

YES -

Go to step 20.

NO -

Repair poor connections or loose terminals, and recheck.

20. Test the speaker(s) Speaker Test/Replacement.

Is the speaker(s) OK?

YES -

Go to step 21.

NO -

Replace the speaker(s) Speaker Test/Replacement.

21. Reconnect the speaker connector(s).

22. Disconnect stereo amplifier connector A (18P).

23. Check for continuity between body ground and stereo amplifier connector A (18P) according to the table.









Is there continuity?

YES -

Repair a short to body ground in the wire(s) between the stereo amplifier and the speaker(s).

NO -

Go to step 24.

24. Disconnect the left tweeter 2P connector and the right tweeter 2P connector.

25. Measure the resistance between each pair of speaker terminals at stereo amplifier connector A (18P) according to the table.









Is there resistance OK?

YES -

Go to step 26.

NO -

Repair an open or a short in the wire between the stereo amplifier and the speaker(s).

26. Connect stereo amplifier connector A (18P) terminals No. 6 and No. 15 with a jumper wire, and terminals No. 7 and No. 16 with a jumper wire.






27. Check for continuity between the tweeter 2P connector according to the table.









Is there continuity?

YES -

Go to step 28.

NO -

Repair an open in the wire between the stereo amplifier and the tweeter.

28. Disconnect the jumper wires.

29. Disconnect stereo amplifier connector B (28P).

30. Disconnect audio unit connector D (36P).

31. Check for continuity between body ground and audio-navigation unit connector D (36P) terminals No. 7 and No. 8 individually.





Is there continuity?

YES -

There is a short to body ground in the wire(s) between the audio-navigation unit and the stereo amplifier. Replace the affected shielded harness.

NO -

Go to step 32.

32. Check for continuity between the terminals of audio-navigation unit connector D (36P) according to the table.









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 -

Go to step 33.

33. Check for continuity between audio-navigation unit connector D (36P) and stereo amplifier connector B (28P) according to the table.













Is there continuity?

YES -

Go to step 34.

NO -

There is an open in the wire(s) between the audio-navigation unit and the stereo amplifier. Replace the affected shielded harness.

34. Disconnect audio-navigation unit connector A (24P) and connector B (24P).

NOTE: Eject all the disc(s) before disconnecting the audio-navigation unit to prevent damaging the CD/DVD player's load mechanism.

35. Check for continuity between audio-navigation unit connector A (24P), connector B (24P), and stereo amplifier connector B (28P) according to the table.

















Is there continuity?

YES -

Go to step 36.

NO -

There is an open in the wire(s) between the stereo amplifier and the audio-navigation unit. Replace the affected shielded harness.

36. Check for continuity between body ground and audio-navigation unit connector A (24P) and connector B (24P) according to the table.













Is there continuity?

YES -

There is a short to body ground in the wire(s) between the stereo amplifier and the audio-navigation unit. Replace the affected shielded harness.

NO -

Go to step 37.

37. Check for continuity between the terminals of stereo amplifier connector B (28P) and audio-navigation unit connector A (24P) and connector B (24P) according to the table.

















Is there continuity between any of the terminals?

YES -

There is short in the wires between the audio-navigation unit and the stereo amplifier. Replace the affected shielded harness.

NO -

Substitute a known-good stereo amplifier Service and Repair, then reconnect all of the connectors, and recheck. If the symptom/indication goes away, replace the original stereo amplifier Service and Repair. If the symptom/indication is still present, replace the audio-navigation unit Audio-Navigation Unit Removal/Installation.

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