Audio Unit Power Switch Will Not Turn On (No Information Display and No Sound)
Symptom Troubleshooting: Audio unit power switch will not turn on (No information display and no sound)
Audio unit power switch will not turn on (No information display and no sound)
NOTE:
- Check the vehicle battery condition first. Testing and Inspection
- Check the connectors for poor connections or loose terminals.
1. Turn the ignition switch to ON (II).
2. Push the power switch on to see if audio unit turns on.
Does the audio unit display operate properly, and does the audio unit sound normal?
YES - Intermittent failure, the system is OK at this time.
NO - Go to step 3.
3. Turn the ignition switch to LOCK (0).
4. Check the No. 15 (10 A) fuse in the under-hood fuse/relay box and the No. 18 (7.5 A) fuse in the driver's under-dash fuse/relay box.
Are the fuses OK?
YES - Go to step 5.
NO - Replace the fuse, and recheck.
5. Remove the audio unit, with ELS audio system, Audio Unit Removal/Installation (With AcuraLink) with premium audio system. Audio Unit Removal/Installation (With Premium Audio System) Check that the audio unit connectors are properly connected.
Are they connected properly?
YES - Go to step 6.
NO - Repair poor connections and reconnect the connectors, and recheck the function.
6. Disconnect audio unit connector A (24P).
NOTE: Eject all the discs before disconnecting the audio unit and the audio disc changer to prevent damaging the CD/DVD player's load mechanism.
7. Turn the ignition switch to ON (II).
8. Measure the voltage between body ground and audio unit connector A (24P) terminals No. 14 and No. 24 individually.
Is there battery voltage?
YES - Go to step 9.
NO - Repair an open in the wire(s) between No. 15 (10 A) fuse in the under-hood fuse/relay box, the No. 18 (7.5 A) fuse in the driver's under-dash fuse/relay box and the audio unit.
9. Turn the ignition switch to LOCK (0).
10. Reconnect audio unit connector A (24P).
11. Turn the ignition switch to ON (II).
12. Measure the voltage between audio unit connector A (24P) terminal No. 12 and body ground.
Is there less than 0.2 V?
YES -
- With ELS audio system: Go to step 13.
- With premium audio system: Substitute a known-good audio unit, Audio Unit Removal/Installation (With Premium Audio System) and recheck. If the symptom/indication goes away, replace the original audio unit.
NO - Repair an open or high resistance in the wire between audio unit and body ground (G401).
13. Turn the ignition switch to LOCK (0).
14. Disconnect the audio-navigation switch panel 24P connector.
15. Turn the ignition switch to ON (II).
16. Measure the voltage between audio-navigation switch panel 24P connector terminal No. 14 and body ground.
Is there about 3 V?
YES - Go to step 17.
NO - Repair an open in the wire between the audio-navigation switch panel and the audio unit.
17. Turn the ignition switch to LOCK (0).
18. Reconnect the audio-navigation switch panel 24P connector.
19. Turn the ignition switch to ON (II).
20. Measure the voltage between audio-navigation switch panel 24P connector terminal No. 17 and body ground.
Is there battery voltage?
YES - Substitute a known-good audio-navigation switch panel, Audio-Navigation Switch Panel Removal/Installation (With Navigation) and recheck. If the symptom/indication goes away, replace the original audio-navigation switch panel. If symptom/indication is still present, replace the audio unit. Audio Unit Removal/Installation (With AcuraLink)
NO - Repair an open in the wire between the audio-navigation switch panel and the audio unit, or check for a short to ground. If there is no short to power, substitute a known-good audio unit, Audio Unit Removal/Installation (With AcuraLink) and recheck. If the symptom goes away, replace the original audio unit.
