Audio System Symptom Troubleshooting - USB input sound is low or cannot be heard(Without Navigation)

USB input sound is low or cannot be heard

NOTE:

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

Determine possible failure area (USB system, others)
-1. Press the engine start/stop button to select the ON mode.

-2. Do the Self-Diagnostic Function, and use the speaker check mode .

Do all speakers make a sound?

YES

Go to step 2.

NO: With premium audio

Go to No sound is heard from the speaker(s) (display is normal) (without navigation, with premium audio) troubleshooting .

NO: Without premium audio

Go to No sound is heard from the speaker(s) (display is normal) (without navigation, without premium audio) troubleshooting .
Problem verification
-1. Press the engine start/stop button to select the OFF mode.

-2. On the client's vehicle, connect the client's USB device to the USB port located in the center console.

-3. Press the engine start/stop button to select the ON mode.

-4. Turn on the audio unit, and press the AUX button to select the USB mode.

-5. Check if the USB device can be operated with the audio unit (Folders or Files UP/DOWN, etc.).

Can you operate the USB device, and is the sound normal?

YES

Intermittent failure, the USB device is OK at this time.

NO: You can select USB device but sound is low or cannot be heard

The failure is duplicated, go to step 3.

NO: USB device does not work

Go to USB device does not function (without navigation) troubleshooting .
Determine possible failure area (USB device, others)
-1. Press the engine start/stop button to select the OFF mode.

-2. Connect the client's USB device to a known-good vehicle (same year/trim) that is equipped with a USB adapter, and check the USB device operation.

Does the USB device work properly in the known-good vehicle?

YES

Go to step 4.

NO

USB device is faulty or not compatible.

Determine possible failure area (related unit, others)

-1. Return to the client's vehicle.

-2. Disconnect the following connectors.

XM receiver connector A (14P) (with XM)

HandsFreeLink control unit 32P connector

-3. Press the engine start/stop button to select the ON mode.

-4. Check if the USB audio can be played.

Is the USB audio sound normal?

YES: With XM

Go to step 5.

YES: Without XM

Replace the HandsFreeLink control unit .

Go to step 6.

HandsFreeLink control unit check
-1. Press the engine start/stop button to select the OFF mode.

-2. Reconnect the HandsFreeLink control unit 32P connector .

-3. Press the engine start/stop button to select the ON mode.

-4. Check if the USB audio can be played.

Is the USB audio sound normal?

YES

Replace the XM receiver .

NO

Replace the HandsFreeLink control unit .

Shorted wire check (GA AUDIO lines) 1

-1. Press the engine start/stop button to select the OFF mode.

-2. Disconnect the following connectors.

Audio unit connector C (14P)

Audio display unit connector A (32P)

-3. Check for continuity between these test points and body ground individually.

Test condition	OFF mode
	Audio unit connector C (14P): disconnected
	Audio display unit connector A (32P): disconnected
	XM receiver connector A (14P) (with XM): disconnected

HandsFreeLink control unit 32P connector

Connector	Test circuit	Terminal
Audio unit connector C (14P)	GA AUDIO L+	No. 1 (RED)
	GA AUDIO R+	No. 2 (WHT)
	GA AUDIO L	No. 7 (GRN)
	GA AUDIO R	No. 8 (BLK)

Courtesy of HONDA, U.S.A., INC.

Is there continuity?

YES

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

The GA AUDIO wires are not shorted to ground. Go to step 7.

Shorted wire check (GA AUDIO lines) 2

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

Test condition	OFF mode
	Audio unit connector C (14P): disconnected
	Audio display unit connector A (32P): disconnected
	XM receiver connector A (14P) (with XM): disconnected
	HandsFreeLink control unit 32P connector: disconnected

Test circuits	Connector: Audio unit connector C (14P)
Test circuits	Test point 1	Test points 2
GA AUDIO L+ to GA AUDIO R+, SH GA AUDIO, GA AUDIO L-, GA AUDIO R-	No. 1 (RED)	No. 2 (WHT), No. 3 (GRY), No. 7 (GRN), No. 8 (BLK)
GA AUDIO R+ to SH GA AUDIO, GA AUDIO L-, GA AUDIO R-	No. 2 (WHT)	No. 3 (GRY), No. 7 (GRN), No. 8 (BLK)
SH GA AUDIO to GA AUDIO L-, GA AUDIO R-	No. 3 (GRY)	No. 7 (GRN), No. 8 (BLK)
GA AUDIO L-to GA AUDIO R-	No. 7 (GRN)	No. 8 (BLK)

Courtesy of HONDA, U.S.A., INC.

Is there continuity between any of the terminals?

YES

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

The GA AUDIO wires are not shorted in the wires. Go to step 8.

Open wire check (GA AUDIO lines)

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

Test condition	OFF mode
	Audio unit connector C (14P): disconnected
	Audio display unit connector A (32P): disconnected
	XM receiver connector A (14P) (with XM): disconnected
	HandsFreeLink control unit 32P connector: disconnected

Test circuit	Test point 1:Audio unit connector C (14P)	Test point 2:Audio display unit connector A (32P)
GA AUDIO L+	No. 1 (RED)	No. 9 (RED)
GA AUDIO R+	No. 2 (WHT)	No. 8 (WHT)
GA AUDIO L	No. 7 (GRN)	No. 25 (GRN)
GA AUDIO R	No. 8 (BLK)	No. 24 (BLK)

Courtesy of HONDA, U.S.A., INC.

Courtesy of HONDA, U.S.A., INC.

Is there continuity?

YES

The GA AUDIO wires are OK. Go to step 9.

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

Audio unit check
-1. Substitute a known-good audio display unit .

-2. Reconnect all the connectors, and recheck.

Does the symptom go away?

YES

Replace the original audio display unit.

NO

Replace the audio unit .