Auxiliary Input Sound Is Low or Cannot Be Heard (With Navigation)

Audio System Symptom Troubleshooting - Auxiliary input sound is low or cannot be heard

Auxiliary input sound is low or cannot be heard (with navigation)

NOTE:

- Check the vehicle battery condition first Battery Test.
- Use auxiliary stereo cables with 3.5 mm ends only.
- Auxiliary accessories may be played on the audio-navigation unit using the auxiliary input.
- Check the connectors for poor connections or loose terminals.

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 system, and connect an auxiliary accessory to the auxiliary input jack.

3. Check the volume operation.

Is the sound normal?

YES -

Intermittent failure, the system is OK at this time.

NO -

Go to step 4.

4. Make sure the auxiliary accessory volume is set to high.

Is the volume set to high?

YES -

Go to step 5.

NO -

Raise the auxiliary accessory volume to high. Make sure the audio-navigation unit volume is turned down before retesting.

5. Substitute a known-good auxiliary audio accessory and/or auxiliary stereo cable, and recheck.

Does the auxiliary audio accessory operate properly?

YES -

Original auxiliary audio accessory or auxiliary stereo cable is faulty.

NO -

Go to step 6.

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

7. Remove the USB adapter holder/auxiliary jack assembly USB Adapter Holder/Auxiliary Jack Assembly Replacement, and check for poor connection or loose terminals at the auxiliary jack assembly 5P connector.

Are the connection or terminals OK?

YES -

Go to step 8.

NO -

Repair poor connection or loose terminals, and recheck.

8. Disconnect the auxiliary jack assembly 5P connector.

9. Disconnect audio-navigation unit connector B (24P).

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









Is there continuity?

YES -

There is a short to body ground in the wire(s) between the audio-navigation unit and the auxiliary jack assembly. Repair or replace the affected harness.

NO -

Go to step 11.

11. Check for continuity between the terminals of audio-navigation unit connector B (24P) according to the table.









Is there continuity between any of the terminals?

YES -

There is a short in the wire(s) between the audio-navigation unit and the auxiliary jack assembly. Replace the affected shielded harness.

NO -

Go to step 12.

12. Check for continuity between audio-navigation unit connector B (24P) and the auxiliary jack assembly 5P connector according to the table.













Is there continuity?

YES -

Substitute a known-good USB adapter holder/auxiliary jack assembly USB Adapter Holder/Auxiliary Jack Assembly Replacement, then reconnect all of the connectors, and recheck. If the symptom/indication goes away, replace the original USB adapter holder/auxiliary jack assembly USB Adapter Holder/Auxiliary Jack Assembly Replacement. If the symptom/indication is still present, replace the audio-navigation unit Audio-Navigation Unit Removal/Installation.

NO -

There is an open in the wire(s) between the audio-navigation unit and the auxiliary jack assembly. Repair or replace the affected harness.