Audio System Symptom Troubleshooting - USB device does not function(With Normal Audio)

NOTE:

Check the vehicle 12 volt 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 customer'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 Version 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.

1. Determine possible failure area (GA-NET circuit, others):
- 1. Turn the vehicle to 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 multi-information display unit?

YES

Go to step 2.

NO: With HandsFreeLink

Go to step 6.

NO: Without HandsFreeLink

Go to step 7.
2. Determine possible failure area (USB device, others):
- 1. Turn the vehicle to the OFF (LOCK) mode.

- 2. Connect the customer'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.
3. Problem verification:
- 1. On the customer's vehicle, connect the customer's USB device to the USB port located in the center console.

- 2. Turn the vehicle to the ON mode.

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

Does the USB device work properly in the customer'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.

4. Determine possible failure area (USB lines, multi-information display unit):

- 1. Turn the vehicle to the OFF (LOCK) mode.

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

- 3. Disconnect the following connector.

Multi-information display unit connector B (5P)

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

Test condition	Vehicle OFF (LOCK) mode
	Multi-information display unit connector B (5P): disconnected

Test point 1: Multi-information display unit connector B (5P)	Test point 2:USB port 5P connector
No. 1	No. 4
No. 2	No. 3
No. 3	No. 2
No. 4	No. 1

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

Is there continuity?

YES

Replace the multi-information display unit .

Go to step 5.

5. USB main harness check:

- 1. Disconnect the following connector.

USB adapter 5P connector

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

Test condition	Vehicle OFF (LOCK) mode
	Multi-information display unit connector B (5P): disconnected
	USB adapter 5P connector: disconnected

Test point 1: Multi-information display unit connector B (5P)	Test point 2:USB adapter 5P connector
No. 1	No. 1
No. 2	No. 2
No. 3	No. 3

Test point 1: Multi-information display unit connector B (5P)	Test point 2:USB adapter 5P connector
No. 4	No. 4

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

Is there continuity?

YES

Replace the USB adapter , then recheck.

Replace the USB main harness, then recheck.

6. Determine possible failure area (related unit, others):
- 1. Turn the vehicle to the OFF (LOCK) mode.

- 2. Disconnect the following connector.

HandsFreeLink control unit 32P connector

- 3. Turn the vehicle to the ON mode.

- 4. 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 multi-information display unit?

YES

Replace the HandsFreeLink control unit .

NO

Go to step 7.

7. Shorted wire check (GA BUS+ line, GA BUS- line):

- 1. Turn the vehicle to the OFF (LOCK) mode.

- 2. Disconnect the following connectors.

Audio unit connector C (14P)

Multi-information display unit connector A (32P)

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

Test condition	Vehicle OFF (LOCK) mode
	HandsFreeLink control unit 32P connector: disconnected
	Audio unit connector C (14P): disconnected
	Multi-information display unit connector A (32P): disconnected
Test point 1	Audio unit connector C (14P) No. 12 - Refer to: Audio Unit Connector for Inputs and Outputs(With Display Audio)Audio Unit Connector for Inputs and Outputs(With Normal Audio)
Test point 2	Body ground

Test point 1

Audio unit connector C (14P) No. 11 - Refer to: Audio Unit Connector for Inputs and Outputs(With Display Audio)Audio Unit Connector for Inputs and Outputs(With Normal Audio)

Test point 2

Body ground

Is there continuity?

YES

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

The GA BUS+ and the GA BUS- wires are not shorted to ground. Go to step 8.

8. Shorted wire check (GA BUS+ line to GA BUS- line):

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

Test condition	Vehicle OFF (LOCK) mode
	HandsFreeLink control unit 32P connector: disconnected
	Audio unit connector C (14P): disconnected
	Multi-information display unit connector A (32P): disconnected
Test point 1	Audio unit connector C (14P) No. 12 - Refer to: Audio Unit Connector for Inputs and Outputs(With Display Audio)Audio Unit Connector for Inputs and Outputs(With Normal Audio)
Test point 2	Audio unit connector C (14P) No. 11 - Refer to: Audio Unit Connector for Inputs and Outputs(With Display Audio)Audio Unit Connector for Inputs and Outputs(With Normal Audio)

Is there continuity?

YES

There is a short in the wire(s) between the audio unit and the multi-information display unit. Replace the affected shielded harness.

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

9. Shorted wire check (SH GA BUS line to another lines):

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

Test condition	Vehicle OFF (LOCK) mode
	HandsFreeLink control unit 32P connector: disconnected
	Audio unit connector C (14P): disconnected
	Multi-information display unit connector A (32P): disconnected
Test point 1	Audio unit connector C (14P) No. 4 - Refer to: Audio Unit Connector for Inputs and Outputs(With Display Audio)Audio Unit Connector for Inputs and Outputs(With Normal Audio)
Test point 2	Audio unit connector C (14P) No. 12 - Refer to: Audio Unit Connector for Inputs and Outputs(With Display Audio)Audio Unit Connector for Inputs and Outputs(With Normal Audio)

Test point 1	Audio unit connector C (14P) No. 4 - Refer to: Audio Unit Connector for Inputs and Outputs(With Display Audio)Audio Unit Connector for Inputs and Outputs(With Normal Audio)
Test point 2	Audio unit connector C (14P) No. 11 - Refer to: Audio Unit Connector for Inputs and Outputs(With Display Audio)Audio Unit Connector for Inputs and Outputs(With Normal Audio)

Is there continuity?

YES

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

The SH GA BUS wire is OK. Go to step 10.

10. Open wire check (GA BUS+ line, GA BUS- line):

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

Test condition	Vehicle OFF (LOCK) mode
	HandsFreeLink control unit 32P connector: disconnected
	Audio unit connector C (14P): disconnected
	Multi-information display unit connector A (32P): disconnected
Test point 1	Audio unit connector C (14P) No. 12 - Refer to: Audio Unit Connector for Inputs and Outputs(With Display Audio)Audio Unit Connector for Inputs and Outputs(With Normal Audio)
Test point 2	Multi-information display unit connector A (32P) No. 27

Test point 1	Audio unit connector C (14P) No. 11 - Refer to: Audio Unit Connector for Inputs and Outputs(With Display Audio)Audio Unit Connector for Inputs and Outputs(With Normal Audio)
Test point 2	Multi-information display unit connector A (32P) No. 11

Is there continuity?

YES

The GA BUS+ and the GA BUS- wires are OK. Go to step 11.

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

11. Multi-information display unit check (substitution):
- 1. Substitute a known-good multi-information display unit .

- 2. Reconnect all the connectors, and recheck.

Does the symptom go away?

YES

Replace the original multi-information display unit .

NO

Replace the audio unit - Refer to: Audio Unit Removal and Installation(With Display Audio)Audio Unit Removal and Installation(With Normal Audio) .