Volume Does Not Increase With Speed (With Navigation)
Audio System Symptom Troubleshooting - Volume does not increase with speed (with navigation)
Volume does not increase with speed ('10 model with navigation)
NOTE:
- Check the vehicle battery condition first Testing and Inspection.
- Check the connectors for poor connections or loose terminals.
1. Verify SVC mode setting in the audio-navigation unit sound set-up.
Is the SVC set to off?
YES -
Change the setting to MID Description and Operation, and retest.�
NO -
Go to step 2.
2. Enter the navigation diagnostic mode, and use the Car status diagnosis to check the vehicle speed pulse signal Navigation System Diagnostic Mode.
Is there a vehicle speed signal OK?
YES -
Substitute a known-good audio-navigation unit 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 3.
3. Test-drive the vehicle at highway speeds, and monitor if the volume increases.
Does the volume increase?
YES -
Intermittent failure, the system is OK at this time.�
NO -
Go to step 4.
4. Turn the ignition switch to LOCK (0).
5. Remove the audio-navigation unit Audio-Navigation Unit Removal/Installation, and disconnect the audio-navigation unit connector A (24P).
NOTE:
- Eject all the discs before removing the audio-navigation unit and the audio disc changer to prevent damaging the CD player's load mechanism.
- Remove the PC card before removing the audio-navigation unit.
6. Turn the ignition switch to ON (II).
7. Drive the vehicle, and have an assistant measure the voltage at audio-navigation unit connector A (24P) terminal No. 15 and body ground.
Is there a 0-5 V pulse or about 2.5 V average?
YES -
Substitute a known-good audio-navigation unit 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 -
Repair an open or a short in the wire between audio-navigation unit connector A (24P) terminal No. 15 and PCM connector A (49P) terminal No. 30. If no open are found, substitute a known-good PCM Initial Inspection and Diagnostic Overview, and recheck. If the symptom/indication goes away, replace the original PCM Service and Repair.�