AcuraLink Messages Cannot Be Heard or Are Weak
AcuraLink messages cannot be heard or are weak1. Turn the ignition switch to ON (II).
2. Check that the audio system is operating normally and the speaker sound levels from different audio sources (AM/FM, XM, CD/DVDs, Navigation, etc.).
Does the audio system work normally and is the audio output from the speaker normal when playing various audio sources?
YES - Go to step 3.
NO - Refer to the audio system symptom troubleshooting. Audio System
3. Check the audio system when AcuraLink messages are played (see owner's manual to play an AcuraLink message).
Does the audio system mute when AcuraLink messages are being played?
YES - If the audio system mute and plays the AcuraLink messages at a normal volume, the system is OK at this time. If the messages are weaker than normal volume, go to step 4.
NO - Go to step 19.
4. Turn the ignition switch to LOCK (0).
5. Remove the audio-HVAC display module assembly, and disconnect audio unit connector B (14P).
6. Disconnect AcuraLink control unit (XM receiver) connector A (20P).
7. Check for continuity between body ground and AcuraLink control unit (XM receiver) connector A (20P) terminals No. 9, No. 10, No. 19, and No. 20 individually.
Is there continuity?
YES - Short to body ground in the wire(s) between audio unit and AcuraLink control unit (XM receiver). Replace the affected shielded harness.
NO - Go to step 8.
8. Check for continuity between the terminals of AcuraLink control unit (XM receiver) connector A (20P) according to the table.
Is there continuity between any of the terminals?
YES - Short in the wire(s) between AcuraLink control unit (XM receiver) and audio unit. Replace the appropriate shielded harness.
NO - Go to step 9.
9. Turn the ignition switch to ON (II).
10. Measure the voltage between body ground and AcuraLink control unit (XM receiver) connector A (20P) terminals No. 9, No. 10, No. 19, and No. 20 individually.
Is there less than 0.1 V?
YES - Go to step 11.
NO - Short to power in the wire(s) between audio unit and AcuraLink control unit (XM receiver). Replace the affected shielded harness.
11. Turn the ignition switch to LOCK (0).
12. Check for continuity between AcuraLink control unit (XM receiver) connector A (20P) and audio unit connector B (14P) according to the table.
Is there continuity?
YES - Go to step 13.
NO - Open in the wire(s) between AcuraLink control unit (XM receiver) and audio unit. Replace the affected shielded harness.
13. Disconnect AcuraLink control unit (XM receiver) connector C (16P), audio unit connector C (40P) and HandsFreeLink control unit 28P connector.
14. Check for continuity between body ground and AcuraLink control unit (MX receiver) connector C (16P) terminals No. 3 and No. 11 individually.
Is there continuity?
YES - Short to body ground in the wire(s) between audio unit, HandsFreeLink control unit and AcuraLink control unit (XM receiver). Replace the affected shielded harness.
NO - Go to step 15.
15. Check for continuity between the terminals of AcuraLink control unit (XM receiver) connector C (16P) according to the table.
Is there continuity?
YES - Short in the wire(s) between audio unit, HandsFreeLink control unit and AcuraLink control unit (XM receiver). Replace the affected shielded harness.
NO - Go to step 16.
16. Check for continuity between AcuraLink control unit (XM receiver) connector C (16P) and audio unit connector C (40P) according to the table.
Is there continuity?
YES - Go to step 17.
NO - Open in the wire(s) between AcuraLink control unit (XM receiver) and audio unit. Replace the affected shielded harness.
17. Check for continuity between HandsFreeLink control unit 28P connector and audio unit connector C (40P) according to the table.
Is there continuity?
YES - Go to step 18.
NO - Open in the wire(s) between HandsFreeLink control unit and audio unit. Replace the affected shielded harness.
18. Substitute a known-good AcuraLink control unit (XM receiver) and recheck the function.
Does the problem go away?
YES - Replace the original AcuraLink control unit (XM receiver).
NO - Substitute a known-good HandsFreeLink control unit and recheck. If the symptom/indication goes away, replace the original HandsFreeLink control unit. If the symptom/indication is still present, replace the audio unit.
19. Turn the ignition switch to LOCK (0).
20. Remove the audio-HVAC display module assembly, and disconnect audio unit connector C (40P).
NOTE: Eject all the discs before removing the audio unit to prevent damaging the CD/DVD player's load mechanism.
21. Disconnect AcuraLink control unit (XM receiver) connector C (16P).
22. Check for continuity between AcuraLink control unit (XM receiver) connector C (16P) terminal No. 4 and body ground.
Is there continuity?
YES - Repair short to body ground in the wire between AcuraLink control unit (XM receiver) and audio unit.
NO - Go to step 23.
23. Check for continuity between AcuraLink control unit (XM receiver) connector C (16P) terminal No. 4 and audio unit connector C (40P) terminal No. 8.
Is there continuity?
YES - Substitute a known-good AcuraLink control unit (XM receiver) and recheck. If the symptom/indication goes away, replace the original AcuraLink control unit (XM receiver). If the symptom/indication is still present, replace the audio unit.
NO - Repair open in the wire between AcuraLink control unit (XM receiver) and audio unit.