USB Input Sound Is Low Or Cannot Be Heard

WARNING: This page is about a different car, the 2011 Honda Fit, 2010 Honda Fit, and 2009 Honda Fit. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

Check the vehicle battery condition first, (see BATTERY TEST )
Check the connectors for poor connections or loose terminals.
Not all players and player functions work with the USB adapter. Please see the Owner's Manual for more information. Always test the customers USB device in a known-good vehicle of the same year and trim (if possible). Technologies change and are updated frequently which may result in USB devices working in newer vehicles, but not in older vehicles of the same model.

Turn the ignition switch to ON (II).
Do the speaker check mode with the self-diagnostic mode (see SPEAKER CHECK MODE ).
Do all speakers make a sound?

YES - Go to step 3.

NO - Go to no sound is heard from speaker(s).
- with navigation, (see NO SOUND IS HEARD FROM THE SPEAKER (S) (DISPLAY IS NORMAL) (WITH NAVIGATION) )
- without navigation (see NO SOUND IS HEARD FROM THE SPEAKER (S) (DISPLAY IS NORMAL) (WITHOUT NAVIGATION) ).
Turn the ignition switch to LOCK (0).
Connect the customer's USB device to a known-good vehicle (same year/trim) equipped with an USB adapter, and check the USB device operation.
Is the USB device working properly?

YES - Go to step 5.

NO - The USB device is faulty. Also check the USB cable and the USB adapter connector condition.
On the customer's vehicle, connect the customer's USB device to the USB adapter.
Turn the ignition switch to ON (II), and turn on the audio unit or the audio-navigation unit.
Check if the USB device can be operated with the audio unit or audio-navigation unit (Folders or Files UP/DOWN, etc.).
Can the USB device be operated but no sound is heard?

YES - Go to step 8.

NO - If the sound is normal, USB device is OK at this time. If the USB device cannot be operated. Go to USB audio device does not function (see USB DEVICE DOES NOT FUNCTION ).
Turn the ignition switch to LOCK (0).
Disconnect audio unit or audio-navigation unit connector E (14P).
Disconnect USB adapter unit connector A (14P).

Check for continuity between the terminals of audio unit or audio-navigation unit connector E (14P) according to the table.

CONTINUITY REFERENCE CHARTCONTINUITY REFERENCE CHARTCONTINUITY REFERENCE CHART

Without navigation
From terminal (wire color)	To terminals (wire color)
E4 (PNK)	E5 (BRN), E6 (WHT), E13 (RED), E14 (LT BLU)
E5(BRN)	E6 (WHT), E13(RED), E14 (LT BLU)
E6 (WHT)	E13 (RED), E14 (LT BLU)
E13(RED)	EU (LT BLU)

CONTINUITY REFERENCE CHARTCONTINUITY REFERENCE CHARTCONTINUITY REFERENCE CHART

With navigation
From terminal (wire color)	To terminals (wire color)
E4 (GRY)	E5 (BLK), E6 (WHT), E13 (RED), E14 (GRN)
E5(BLK)	E6 (WHT), E13 (RED), E14 (GRN)
E6 (WHT)	E13 (RED), E14 (GRN)
E13(RED)	E14 (GRN)

Fig 1: Checking Continuity Between Terminals Of Audio Unit Or Audio-Navigation Unit Connector E (14P)

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity between any of the terminals?

YES - There is a short in the wires between the audio unit and the USB adapter unit.

With navigation: Replace the dashboard wire harness.
Without navigation: Replace the affected shielded harness.

NO - Go to step 12.

Check for continuity between audio unit or audio-navigation unit connector E (14P) and USB adapter unit connector A (14P) according to the table.

CONTINUITY REFERENCE CHARTCONTINUITY REFERENCE CHARTCONTINUITY REFERENCE CHART

Without navigation
Audio unit	USB adapter unit connector	Wire color
E5	A5	BRN
E6	A6	WHT
E13	A13	RED
E14	A14	LT BLU

CONTINUITY REFERENCE CHARTCONTINUITY REFERENCE CHARTCONTINUITY REFERENCE CHART

With navigation
Audio-navigation unit connector	USB adapter unit connector	Wire color
E5	A5	BLK
E6	A6	WHT
E13	A13	RED
E14	A14	GRN

Fig 2: Checking Continuity Between Audio Unit Or Audio-Navigation Unit Connector E (14P) And USB Adapter Unit Connector A (14P)

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Fig 3: Checking Continuity Between Audio Unit Or Audio-Navigation Unit Connector And USB Adapter Unit Connector

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES - Substitute a known-good USB adapter unit, then reconnect all of the connectors and recheck. If the symptom/indication goes away, replace the original USB adapter unit. If the symptom/indication is still present, replace the audio-navigation unit or audio unit.

NO - Open in the wire(s) between the USB adapter unit and the audio-navigation unit or audio unit.

With navigation: Replace the dashboard wire harness.
Without navigation: Replace the affected shielded harness.