Auxiliary Input Sound Is Low Or Cannot Be Heard

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

Auxiliary input sound is low or cannot be heard

NOTE:

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

1. Turn the ignition switch to ON (II).

2. Turn the audio unit, and connect an auxiliary accessory to the auxiliary input jack.

3. Check the volume operation.

Is the sound normal?

YES -

Operation is normal at this time.

NO -

Go to step 4.

4. Make sure 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 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).

7. Check for poor connection or loose terminals at the auxiliary jack assembly 5P connector.

Are the connection or terminals OK?

YES -

- Except 1 CD type, go to step 8.
- 1 CD type, go to step 13.

NO -

Repair poor connection or loose terminals, and recheck.

8. Disconnect the auxiliary jack assembly 5P connector.

9. Disconnect audio unit connector B (20P).

10. Check for continuity between audio unit connector B (20P) 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 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 unit connector B (20P) according to the table.









Is there continuity between any of the terminals?

YES -

There is a short in the wires between the audio unit and the auxiliary jack assembly. Replace the affected shielded harness.

NO -

Go to step 12.

12. Check for continuity between audio unit connector B (20P) and the auxiliary jack assembly 5P connector according to the table.













Is there continuity?

YES -

Substitute a known-good auxiliary jack assembly Auxiliary Jack Assembly Replacement or USB adapter holder/auxiliary jack assembly USB Adapter Holder/Auxiliary Jack Assembly Replacement, and recheck. If the symptom/indication goes away, replace the original auxiliary jack assembly or USB adapter holder/auxiliary jack assembly. If the symptom/indication is still present, replace the audio unit; with navigation Audio Unit Removal/Installation (With Navigation), without navigation Audio Unit Removal/Installation (Without Navigation).

NO -

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

13. Disconnect the auxiliary jack assembly 5P connector.

14. Disconnect audio unit connector B (12P).

15. Check for continuity between audio unit connector B (12P) 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 unit and the auxiliary jack assembly. Repair or replace the affected harness.

NO -

Go to step 16.

16. Check for continuity between the terminals of audio unit connector B (12P) according to the table.









Is there continuity between any of the terminals?

YES -

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

NO -

Go to step 17.

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













Is there continuity?

YES -

Substitute a known-good auxiliary jack assembly Auxiliary Jack Assembly Replacement, and recheck. If the symptom/indication goes away, replace the original auxiliary jack assembly. If the symptom/indication is still present, replace the audio unit Audio Unit Removal/Installation (Without Navigation).

NO -

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