Honda HR-V Owners & Service Manuals

Honda HR-V: Auxiliary Input Sound Is Low Or Cannot Be Heard

NOTE:

  • Check the vehicle 12 volt battery condition first.
  • Set the fader and the balance positions to the center.
  • Use auxiliary stereo cables with 3.5 mm ends only.
  • Check the connectors for poor connections or loose terminals.

1. Problem verification 1:

  1. Turn the vehicle to the ON mode.
  2. Turn on the audio system.
  3. Connect an auxiliary audio accessory to the auxiliary input jack.

Does the display change to the AUX mode?

YES

Go to step 2.

NO

The failure is duplicated, go to step 8.

2. Problem verification 2:

  1. Check the auxiliary audio source sound.

Is the sound normal?

YES

Intermittent failure, the system is OK at this time.

NO

The failure is duplicated, go to step 3.

3. Determine possible failure area (auxiliary audio accessory, others).

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

Is the sound normal?

YES

Original auxiliary audio accessory or auxiliary stereo cable is faulty.

NO

Go to step 4.

4. Shorted wire check (AUX SGND, AUX R CH, AUX L CH lines):

  1. Turn the vehicle to the OFF (LOCK) mode.
  2. Disconnect the auxiliary audio accessory from the auxiliary input jack.
  3. Disconnect the following connectors.

Audio unit connector C (24P)

Auxiliary jack assembly 5P connector

  1. Check for continuity between these test points and body ground individually.

Audio Visual Systems - Testing & Troubleshooting

Is there continuity?

YES

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

NO

The AUX SGND, AUX L CH, and AUX R CH wires are not shorted. Go to step 5.

5. Shorted wire check (AUX lines).

Check for continuity between test points 1 and 2.

Audio Visual Systems - Testing & Troubleshooting

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

The AUX wires not shorted. Go to step 6.

6. Open wire check (AUX SGND, AUX R CH, AUX L CH lines).

Check for continuity between test points 1 and 2.

Audio Visual Systems - Testing & Troubleshooting

Is there continuity?

YES

The AUX SGND, AUX L CH, and AUX R CH wires are OK. Go to step 7.

NO

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

7. Auxiliary jack assembly check (substitution):

  1. Substitute a known-good auxiliary jack assembly.
  2. Reconnect all the connectors, and recheck.

Does the symptom go away?

YES

Replace the original auxiliary jack assembly.

NO

Replace the audio unit - Refer to: Audio Unit Removal and Installation (Display Audio Type (7-inch Screen) ), or Audio Unit Removal and Installation (Color Audio Type (5-inch Screen) ).

8. Determine possible failure area (auxiliary jack assembly, others):

  1. Turn the vehicle to the OFF (LOCK) mode.
  2. Disconnect the auxiliary audio accessory from the auxiliary input jack.
  3. Disconnect the following connector.

Auxiliary jack assembly 5P connector

  1. Connect terminals A and B with a jumper wire.

Audio Visual Systems - Testing & Troubleshooting

  1. Turn the vehicle to the ON mode.
  2. Turn on the audio system.

Does the display change to the AUX mode?

YES

Replace the auxiliary jack assembly.

NO

Go to step 9.

9. Determine possible failure area (AUX DET line, others):

  1. Remove the jumper wire.
  2. Measure the voltage between test points 1 and 2.

Audio Visual Systems - Testing & Troubleshooting

Is there about 3.0 V?

YES

Go to step 11.

NO

Go to step 10.

10. Open wire check (AUX DET line).

Measure the voltage between test points 1 and 2.

Audio Visual Systems - Testing & Troubleshooting

Is there about 3.0 V?

YES

Repair an open in the wire between the audio unit and the auxiliary jack assembly.

NO

Replace the audio unit - Refer to: Audio Unit Removal and Installation (Display Audio Type (7-inch Screen) ), or Audio Unit Removal and Installation (Color Audio Type (5-inch Screen) ).

11. Determine possible failure area (AUX GND line, others):

  1. Turn the vehicle to the OFF (LOCK) mode.
  2. Check for continuity between test points 1 and 2.

Audio Visual Systems - Testing & Troubleshooting

Is there continuity?

YES

Replace the audio unit - Refer to: Audio Unit Removal and Installation (Display Audio Type (7-inch Screen) ), or Audio Unit Removal and Installation (Color Audio Type (5-inch Screen) ).

NO

Go to step 12.

12. Open wire check (AUX GND line):

  1. Disconnect the following connector.

Audio unit connector C (24P)

  1. Check for continuity between test points 1 and 2.

Audio Visual Systems - Testing & Troubleshooting

Is there continuity?

YES

Replace the audio unit - Refer to: Audio Unit Removal and Installation (Display Audio Type (7-inch Screen) ), or Audio Unit Removal and Installation (Color Audio Type (5-inch Screen) ).

NO

Repair an open in the wire between the audio unit and the auxiliary jack assembly.

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