Audio System Symptom Troubleshooting - Volume does not increase with speed(With Navigation, With Display Audio)
NOTE:
- Check the vehicle 12 volt battery condition first .
- If possible, have the customer demonstrate their concern and compare it against a known-good vehicle.
- Check the connectors for poor connections or loose terminals.
- 1. Problem verification:
- 1. Test-drive the vehicle at freeway speeds, and monitor if the volume increases, then compare it to a known-good vehicle.
Does the volume increase, and is it comparable to a known-good vehicle?
YES
Intermittent failure, the system is OK at this time. If the customer's concern is that the level of volume change is not enough, refer to the Owner's Manual to change the SVC level setting.
NO
The failure is duplicated, go to step 2.
- 2. Determine possible failure area (audio setting, others):
- 1. Verify the SVC mode setting in the audio-navigation unit sound set-up.
Is the SVC set to off?
YES
Change the setting to SVC MID, and recheck.
NO
Go to step 3.
- 3. Determine possible failure area (audio-navigation unit, others):
- 1. Go into the System Diagnostic Mode, and select the Vehicle Status to check the vehicle speed .
- 2. Test-drive the vehicle with the help of an assistant, and then watch the vehicle speed in the navigation display.
Is the vehicle speed indicated?
YES
Replace the audio-navigation unit .
NO
Go to step 4.
- 4. Open wire check (B-CAN_H line, B-CAN_L line):
- 1. Turn the vehicle to the OFF (LOCK) mode.
- 2. Disconnect the following connectors.
Audio-navigation unit connector C (20P) Gauge control module connector A (32P) - 3. Check for continuity between test points 1 and 2.
Test condition Vehicle OFF (LOCK) mode Audio-navigation unit connector C (20P): disconnected Gauge control module connector A (32P): disconnected Test point 1 Audio-navigation unit connector C (20P) No. 3 Test point 2 Gauge control module connector A (32P) No. 31 Test point 1 Audio-navigation unit connector C (20P) No. 13 Test point 2 Gauge control module connector A (32P) No. 30 Is there continuity?
YES
Replace the audio-navigation unit .
NO
Repair an open in the wire(s) between the audio-navigation unit and the gauge control module.