USB device does not function (without navigation)

NOTE:

Check the vehicle battery condition first.
Check the connectors for poor connections or loose terminals.
Check the USB device requirement:
- Mass-storage class ready digital audio player with USB 2.0 port
- More than 256 MB of RAM
- Supports MP3, WMA, and AAC (encoded with the i-Tunes) files, DRM files are not supported

Turn the ignition switch to ON (II) and turn on the audio unit.
Push the AUX button to select USB mode.
Is USB NO DATA displayed?

YES -Go to step 3.

NO -Go to step 7.
Turn the ignition switch to LOCK (0).
Connect the client's USB device to a known-good vehicle that equipped with the USB adapter and check the USB device operation.
Is the USB device working properly?

YES -Go to step 5.

NO -USB device is faulty. Also check the USB cable and USB adapter connector condition.
Disconnect USB adapter unit connector B (5P).

Check for continuity between terminals of USB adapter connector B (5P) and the USB adapter 5P connector according to the table.

CONTINUITY REFERENCE CHART

USB adapter unit connector	USB adapter connector
B1	1
B2	2
B3	3
B4	4

Fig 1: Identifying Terminals Of USB Adapter Connector B (5P)

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Fig 2: Identifying Terminals Of USB Adapter 5P Connector

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES -Replace the USB adapter unit (see USB ADAPTER UNIT REPLACEMENT ).

NO -Open in the wire(s) between the USB adapter unit and the USB adapter. Replace the affected shielded harness.

Turn the ignition switch to LOCK (0).
Check that the audio unit connectors and the USB adapter unit connectors properly connected.
Are the connectors properly connected?

YES -Go to step 9.

NO -Connect the connectors and recheck.
Measure the voltage between body ground and USB adapter unit connector A (14P) terminal No. 1.

Fig 3: Measuring Voltage Between Body Ground And USB Adapter Unit Connector A (14P) Terminal No. 1
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there battery voltage?

YES -Go to step 10.

NO -Repair open in the wire between the audio unit and the USB adapter unit.
Turn the ignition switch to ON (II).
Measure the voltage between body ground and USB adapter unit connector A (14P) terminal No. 11.

Fig 4: Measuring Voltage Between Body Ground And USB Adapter Unit Connector A (14P) Terminal No. 11
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there less than 0.1 V?

YES -Go to step 12.

NO -Repair open or high resistance in the wire between the audio unit and the USB adapter unit.
Turn the ignition switch to LOCK (0).
Measure the voltage between body ground and USB adapter unit connector A (14P) terminal No. 2.

Fig 5: Measuring Voltage Between Body Ground And USB Adapter Unit Connector A (14P) Terminal No. 2
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there 10 V or more present?

YES -Go to step 15.

NO -Go to step 14.
Measure the voltage between body ground and audio unit connector E (14P) terminal No. 2.

Fig 6: Measuring Voltage Between Body Ground And Audio Unit Connector E (14P) Terminal No. 2
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there 10 V or more present?

YES -Repair open or short in the wire(s) between the audio unit and the USB adapter unit.

NO -Substitute a known-good audio unit (see AUDIO UNIT REMOVAL/INSTALLATION ), and recheck. If 10 V or more are present, replace the original audio unit.
Turn the ignition switch to ON (II).
Measure the voltage between body ground and audio unit connector E (14P) terminal No. 2.

Fig 7: Measuring Voltage Between Body Ground And Audio Unit Connector E (14P) Terminal No. 2
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there 10 V or more present?

YES -Substitute a known-good audio unit (see AUDIO UNIT REMOVAL/INSTALLATION ), and recheck. If 10 V or more are present, replace the original audio unit.

NO -Go to step 17.
Turn the ignition switch to LOCK (0).
Disconnect audio unit connector E (14P) and USB adapter unit connector A (14P).
Check for continuity between body ground and audio unit connector E (14P) terminals No. 9 and No. 10 individually.

Fig 8: Identifying Body Ground And Audio Unit Connector E (14P) Terminals
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES -Short to body ground in the wires between the audio unit and the USB adapter unit. Replace the affected shielded harness.

NO -Go to step 20.

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

CONTINUITY REFERENCE CHART

From terminal (wire color)	To terminals (wire color)
E3 (BRN)	E9 (BLU), E10 (PNK)
E9 (BLU)	E10 (PNK)

Fig 9: Identifying Terminals Of Audio Unit Connector E (14P)

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity between any of the terminals?

YES -Short in the wires between the audio unit and the USB adapter unit. Replace the affected shielded harness.

NO -Go to step 21.

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

WIRE COLOR REFERENCE CHART

Audio unit connector	USB adapter unit connector	Wire color
E9	A9	(BLU)
E10	A10	(PNK)

Fig 10: Identifying Terminals Of Audio Unit Connector E (14P)

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Fig 11: Identifying Terminals Of USB Adapter Unit Connector A (14P)

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES -Substitute a known-good USB adapter unit (see USB ADAPTER UNIT REPLACEMENT ), 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 unit (see AUDIO UNIT REMOVAL/INSTALLATION ).

NO -Open in the wire(s) between the audio unit and the USB adapter unit. Replace the affected shielded harness.