Description

No USB playback function file/track

Detection condition

• When USB device connected, connection error detected.

• When USB device connected, audio unit internal malfunction detected.

• When USB device connected, read error detected.

Fail-safe

Not applicable

Possible cause

• USB device malfunction

• Incompatible USB device (format) used

• Auxiliary jack/USB port connector or terminal malfunction

• Auxiliary jack/USB port malfunction

• Audio unit connector or terminal malfunction

• Short to ground in wiring harness between the following terminals:

• Audio unit terminal 3C—Auxiliary jack/USB port terminal UA

• Audio unit terminal 3B—Auxiliary jack/USB port terminal UC

• Audio unit terminal 3D—Auxiliary jack/USB port terminal UB

• Audio unit terminal 3A—Auxiliary jack/USB port terminal UD

• Open circuit in wiring harness between the following terminals:

• Audio unit terminal 3C—Auxiliary jack/USB port terminal UA

• Audio unit terminal 3B—Auxiliary jack/USB port terminal UC

• Audio unit terminal 3D—Auxiliary jack/USB port terminal UB

• Audio unit terminal 3A—Auxiliary jack/USB port terminal UD

• Audio unit malfunction

Step

Inspection

Action

1

• After obtaining the customer’s consent, connect a normal USB device that was not used when the malfunction occurred.

• Is the connection detected?

Yes

System is normal. (Explain to the customer that there is a malfunction in the USB device which was used or a malfunction occurred due to use of an incompatible USB device (format).)

No

Go to the next step.

2

• Switch the ignition off.

• Disconnect the negative battery cable.

  (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.)

• Disconnect the auxiliary jack/USB port connector.

• Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection.

• Is the connector normal?

Yes

Go to the next step.

No

Repair or replace the connector, then go to Step 7.

3

• Inspect the auxiliary jack/USB port.

  (See AUXILIARY JACK/USB PORT INSPECTION.)

• Is the auxiliary jack/USB port normal?

Yes

Go to the next step.

No

Replace the auxiliary jack/USB port, then go to Step 7.

(See AUXILIARY JACK/USB PORT REMOVAL/INSTALLATION.)

4

• Disconnect the audio unit connector.

• Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection.

• Is the connector normal?

Yes

Go to the next step.

No

Repair or replace the connector, then go to Step 7.

5

• Verify that the auxiliary jack/USB port and audio unit connectors are disconnected.

• Inspect for continuity between the following terminals (wiring harness-side) and body ground:

• Auxiliary jack/USB port terminal UA

• Auxiliary jack/USB port terminal UC

• Auxiliary jack/USB port terminal UB

• Auxiliary jack/USB port terminal UD

• Is there continuity?

Yes

Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals:

• Audio unit terminal 3C—Auxiliary jack/USB port terminal UA

• Audio unit terminal 3B—Auxiliary jack/USB port terminal UC

• Audio unit terminal 3D—Auxiliary jack/USB port terminal UB

• Audio unit terminal 3A—Auxiliary jack/USB port terminal UD

If there is a common connector:

• Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to ground.

• Repair or replace the malfunctioning part.

If there is no common connector:

• Repair or replace the wiring harness which has a short to ground.

Go to Step 7.

No

Go to the next step.

6

• Verify that the auxiliary jack/USB port and audio unit connectors are disconnected.

• Inspect for continuity between the following terminals (wiring harness-side):

• Audio unit terminal 3C—Auxiliary jack/USB port terminal UA

• Audio unit terminal 3B—Auxiliary jack/USB port terminal UC

• Audio unit terminal 3D—Auxiliary jack/USB port terminal UB

• Audio unit terminal 3A—Auxiliary jack/USB port terminal UD

• Is there continuity?

Yes

Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals:

• Audio unit terminal 3C—Auxiliary jack/USB port terminal UA

• Audio unit terminal 3B—Auxiliary jack/USB port terminal UC

• Audio unit terminal 3D—Auxiliary jack/USB port terminal UB

• Audio unit terminal 3A—Auxiliary jack/USB port terminal UD

If there is a common connector:

• Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open circuit.

• Repair or replace the malfunctioning part.

If there is no common connector:

• Repair or replace the wiring harness which has an open circuit.

Go to the next step.

No

Go to the next step.

7

• Always reconnect all disconnected connectors.

• Connect the negative battery cable.

  (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.)

• Clear the audio unit DTCs.

  (See CLEARING DTC [AUDIO UNIT].)

• Perform the audio unit DTC inspection.

  (See DTC INSPECTION [AUDIO UNIT].)

• Is the same DTC displayed?

Yes

Repeat the inspection from Step 1.

• If the malfunction recurs, replace the audio unit.

  (See AUDIO UNIT REMOVAL/INSTALLATION.)

Go to the next step.

No

Go to the next step.

8

• Are any other DTCs displayed?

Yes

Repair or replace the malfunctioning part according to the applicable DTC troubleshooting.

(See DTC TABLE [AUDIO UNIT].)

No

DTC troubleshooting completed.