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.
- 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 on the audio unit or navigation 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 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 is set 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. Remove the auxiliary jack assembly, and check that the auxiliary jack assembly is properly connected.

Is the auxiliary jack assembly connected properly?

YES -
- With navigation: go to step 8.
- Without navigation: go to step 13.

NO - Reconnect the connector, and recheck the function.

8. Disconnect auxiliary jack assembly 5P connector.
9. Disconnect navigation unit connector B (22P).
10. Check for continuity between body ground and navigation unit connector B (22P) according to the table.

Is there continuity?

YES - Short to body ground in the wire(s) between navigation unit and auxiliary jack assembly. Replace the affected shielded harness.

NO - Go to step 11.

11. Check for continuity between navigation unit connector B (22P) according to the table.

Is there continuity?

YES - Short in the wire(s) between navigation unit and auxiliary jack assembly. Replace the affected shielded harness.

NO - Go to step 12.

12. Check for continuity between navigation unit connector B (22P) and auxiliary jack assembly 5P connector according to the table.

Is there continuity?

YES - Substitute a known-good auxiliary jack assembly and recheck. If the symptom/indication goes away, replace the original auxiliary jack assembly. If the symptom/indication is still present, replace the navigation unit.

NO - Open in the wire(s) between navigation unit and auxiliary jack assembly. Replace affected shielded harness.

13. Disconnect auxiliary jack assembly 5P connector.
14. Disconnect audio unit connector B (22P).
15. Check for continuity between body ground and audio unit connector B (20P) according to the table.

Is there continuity?

YES - Short to body ground in the wire(s) between audio unit and auxiliary jack assembly. Replace the affected shielded harness.

NO - Go to step 16.

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

Is there continuity?

YES - Short in the wire(s) between navigation unit and auxiliary jack assembly. Replace the affected shielded harness.

NO - Go to step 17.

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