Audio System Symptom Troubleshooting - USB device does not function(Without Navigation)

USB device does not function

NOTE:

Check the vehicle battery condition first .
Check the USB's specifications:
- -
  Mass-storage class ready digital audio player with USB 2.0 port
- -
  More than 256 MB storage space
- -
  Supports MP3, WMA, and AAC (encoded with the iTunes) files, DRM files are not supported
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 older vehicles of the same model.
If Unsupported Ver appears on the display, the vehicle is OK, there is a software problem with the USB device.
Check the connectors for poor connections or loose terminals.

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

-2. Turn on the audio unit, and press the AUX button to select the USB mode.

NOTE: Do not connect the USB device.

Is No Data displayed in the audio display unit?

YES

Go to step 2.

NO

Go to step 6.
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.

Is the USB device working properly in the known-good vehicle?

YES

Go to step 3.

NO

See the Owner's Manual for details about the USB device requirements and approved file types.
Problem verification
-1. On the client's vehicle, connect the client's USB device to the USB port located in the center console.

-2. Press the engine start/stop button to select the ON mode.

-3. Check the USB device operation in the client's vehicle.

Does the USB device work properly in the client's vehicle?

YES

Intermittent failure, the system is OK at this time. Inspect the connectors of the USB device, USB port, and USB adapter for wear.

NO

The failure is duplicated, go to step 4.

Determine possible failure area (USB lines, audio display unit)

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

-2. On the client's vehicle, disconnect the client's USB device from the USB port.

-3. Disconnect the following connector.

Audio display unit connector B (5P)

-4. Check for continuity between test points 1 and 2.

Test condition	OFF mode
	Audio display unit connector B (5P): disconnected

Test circuit	Test point 1:Audio display unit connector B (5P)	Test point 2:USB port 5P connector
USB GND	No. 1	No. 4
USB DATA+	No. 2	No. 3
USB DATA	No. 3	No. 2
USB VBUS	No. 4	No. 1

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

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

Is there continuity?

YES

Replace the audio display unit .

Go to step 5.

USB adapter check

-1. Disconnect the following connector.

USB adapter 5P connector

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

Test condition	OFF mode
	Audio display unit connector B (5P): disconnected
	USB adapter 5P connector: disconnected

Test circuit	Test point 1:USB adapter 5P connector	Test point 2:USB port 5P connector
USB GND	No. 1	No. 4
USB DATA+	No. 2	No. 3
USB DATA	No. 3	No. 2
USB VBUS	No. 4	No. 1

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

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

Is there continuity?

YES

Replace the USB main harness and/or subharness, then recheck.

Replace the USB adapter , then recheck.

Determine possible failure area (related unit, others)

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

-2. Disconnect the following connectors.

HandsFreeLink control unit 32P connector

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

-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 USB mode.

NOTE: Do not connect the USB device.

Is No Data displayed in the audio display unit?

YES: With XM

Go to step 7.

YES: Without XM

Replace the HandsFreeLink control unit .

Go to step 8.

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

NOTE: Do not connect the USB device.

Is No Data displayed in the audio display unit?

YES

Replace the XM receiver .

NO

Replace the HandsFreeLink control unit .

Shorted wire check (GA BUS+ line, GA BUS- line)

-1. Disconnect the following connectors.

Audio unit connector C (14P)

Audio display unit connector A (32P)

-2. 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
	HandsFreeLink control unit 32P connector: disconnected
	XM receiver connector A (14P) (with XM): disconnected
Test circuit	GA BUS-
Test point 1	Audio unit connector C (14P) No. 11 (PNK)
Test point 2	Body ground

Test circuit	GA BUS+
Test point 1	Audio unit connector C (14P) No. 12 (BLU)
Test point 2	Body ground

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 BUS+ and the GA BUS- wires are not shorted to ground. Go to step 9.

Shorted wire check (GA BUS+ line to GA BUS- line)

-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
	HandsFreeLink control unit 32P connector: disconnected
	XM receiver connector A (14P) (with XM): disconnected
Test circuit	GA BUS- , GA BUS+
Test point 1	Audio unit connector C (14P) No. 11 (PNK)
Test point 2	Audio unit connector C (14P) No. 12 (BLU)

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

Is there continuity?

YES

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

The GA BUS+ and the GA BUS- wires are not shorted. Go to step 10.

Shorted wire check (SH GA BUS line to another 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
	HandsFreeLink control unit 32P connector: disconnected
	XM receiver connector A (14P) (with XM): disconnected
Test circuit	SH GA BUS, GA BUS+
Test point 1	Audio unit connector C (14P) No. 4 (GRY)
Test point 2	Audio unit connector C (14P) No. 12 (BLU)

Test circuit	SH GA BUS, GA BUS-
Test point 1	Audio unit connector C (14P) No. 4 (GRY)
Test point 2	Audio unit connector C (14P) No. 11 (PNK)

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

Is there continuity?

YES

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

The SH GA BUS wire is OK. Go to step 11.

Open wire check (GA BUS+ line, GA BUS- line)

-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
	HandsFreeLink control unit 32P connector: disconnected
	XM receiver connector A (14P) (with XM): disconnected
Test circuit	GA BUS-
Test point 1	Audio unit connector C (14P) No. 11 (PNK)
Test point 2	Audio display unit connector A (32P) No. 11 (PNK)

Test circuit	GA BUS+
Test point 1	Audio unit connector C (14P) No. 12 (BLU)
Test point 2	Audio display unit connector A (32P) No. 27 (BLU)

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

Is there continuity?

YES

The GA BUS+ and the GA BUS- wires are OK. Go to step 12.

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 .