DTC: 28:Er01, 28:Er09 [AUDIO]

id0902f6452600

Note

• "iPod" is a registered trademark of Apple Inc. in the United States and other countries.

Description

28:Er01 : USB mechanism malfunction

28:Er09 : No USB playback function file/track

Detection condition

•  When USB device/iPod connected, connection error detected

•  When USB device/iPod connected, audio unit internal malfunction detected

•  When USB device connected, read error detected

Fail-safe function

Not applicable

Possible cause

•  USB device/iPod 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

•  Open circuit in wiring harness between the following terminals:

―  Audio unit terminal 3A and auxiliary jack/USB port terminal UD

―  Audio unit terminal 3B and auxiliary jack/USB port terminal UC

―  Audio unit terminal 3C and auxiliary jack/USB port terminal UA

―  Audio unit terminal 3D and auxiliary jack/USB port terminal UB

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

―  Audio unit terminal 3A and auxiliary jack/USB port terminal UD

―  Audio unit terminal 3B and auxiliary jack/USB port terminal UC

―  Audio unit terminal 3C and auxiliary jack/USB port terminal UA

―  Audio unit terminal 3D and auxiliary jack/USB port terminal UB

•  Audio unit malfunction

Description	28:Er01 : USB mechanism malfunction 28:Er09 : No USB playback function file/track
Detection condition	• When USB device/iPod connected, connection error detected • When USB device/iPod connected, audio unit internal malfunction detected • When USB device connected, read error detected
Fail-safe function	Not applicable
Possible cause	• USB device/iPod 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 • Open circuit in wiring harness between the following terminals: ― Audio unit terminal 3A and auxiliary jack/USB port terminal UD ― Audio unit terminal 3B and auxiliary jack/USB port terminal UC ― Audio unit terminal 3C and auxiliary jack/USB port terminal UA ― Audio unit terminal 3D and auxiliary jack/USB port terminal UB • Short to ground in wiring harness between the following terminals: ― Audio unit terminal 3A and auxiliary jack/USB port terminal UD ― Audio unit terminal 3B and auxiliary jack/USB port terminal UC ― Audio unit terminal 3C and auxiliary jack/USB port terminal UA ― Audio unit terminal 3D and auxiliary jack/USB port terminal UB • Audio unit malfunction

Diagnostic Procedure

Step	Inspection		Action
1	INSPECT USB DEVICE/iPod • Connect the USB device/iPod to another vehicle (model/unit). • Is the USB device/iPod connection detected/unit plays back.	Yes	Go to the next step.
1		No	System is normal. (USB device/iPod malfunction or incompatible USB device.) Go to Step 7.
2	INSPECT AUXILIARY JACK/USB PORT CONNECTOR CONDITION • 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 there any malfunctioning part?	Yes	Repair or replace the connector, then go to Step 7.
2		No	Go to the next step.
3	INSPECT AUXILIARY JACK/USB PORT • Inspect the auxiliary jack/USB port. (See AUXILIARY JACK/USB PORT INSPECTION.) • Is there any malfunctioning part?	Yes	Replace the auxiliary jack/USB port, then go to Step 7. (See AUXILIARY JACK/USB PORT REMOVAL/INSTALLATION.)
3		No	Go to the next step.
4	INSPECT AUDIO UNIT CONNECTOR CONDITION • Switch the ignition off. • Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 1.5].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 2.2].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].) • Disconnect the audio unit connector. • Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection. • Is there any malfunctioning part?	Yes	Repair or replace the connector, then go to Step 7.
4		No	Go to the next step.
5	INSPECT WIRING HARNESS FOR OPEN CIRCUIT BETWEEN AUDIO UNIT AND AUXILIARY JACK/USB PORT • Verify that the connectors for the audio unit and the auxiliary jack/USB port are disconnected. • Inspect for continuity between the following terminals (vehicle wiring harness). ― Audio unit terminal 3A and auxiliary jack/USB port terminal UD ― Audio unit terminal 3B and auxiliary jack/USB port terminal UC ― Audio unit terminal 3C and auxiliary jack/USB port terminal UA ― Audio unit terminal 3D and auxiliary jack/USB port terminal UB • Is there continuity?	Yes	Go to the next step.
5		No	Refer to the wiring diagram and verify if there is a common connector between the following terminals (vehicle wiring harness side). • Audio unit terminal 3A and auxiliary jack/USB port terminal UD • Audio unit terminal 3B and auxiliary jack/USB port terminal UC • Audio unit terminal 3C and auxiliary jack/USB port terminal UA • Audio unit terminal 3D and auxiliary jack/USB port terminal UB 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 Step 7.
6	INSPECT WIRING HARNESS FOR SHORT TO GROUND BETWEEN AUDIO UNIT AND AUXILIARY JACK/USB PORT • Inspect for continuity between the following wiring harness terminals (vehicle wiring harness side) and body ground. ― Auxiliary jack/USB port terminal UD ― Auxiliary jack/USB port terminal UC ― Auxiliary jack/USB port terminal UA ― Auxiliary jack/USB port terminal UB • Is there continuity?	Yes	Refer to the wiring diagram and verify if there is a common connector between the following terminals (vehicle wiring harness side). • Audio unit terminal 3A and auxiliary jack/USB port terminal UD • Audio unit terminal 3B and auxiliary jack/USB port terminal UC • Audio unit terminal 3C and auxiliary jack/USB port terminal UA • Audio unit terminal 3D and auxiliary jack/USB port terminal UB 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 the next step.
6		No	Go to the next step.
7	VERIFY THAT REPAIRS HAVE BEEN COMPLETED • Reconnect all the disconnected connectors. • Connect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 1.5].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 2.2].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].) • Clear the audio unit DTCs. (See CLEARING DTC [AUDIO].) • Perform the audio unit DTC inspection. (See DTC INSPECTION [AUDIO].) • Is the same DTC displayed?	Yes	Return to Step 1 and inspect for other possible causes. If the malfunction recurs, replace the audio unit, then go to the next step. (See AUDIO UNIT REMOVAL/INSTALLATION.)
7		No	Go to the next step.
8	VERIFY IF OTHER DTCs DISPLAYED • Are any other DTCs displayed?	Yes	Repair the malfunctioning part according to the applicable DTC troubleshooting. (See DTC TABLE [AUDIO].)
8		No	DTC troubleshooting completed.