DTC: U3000:09, 09:Er21 [AUDIO]SM2445912
DTC: U3000:09, 09:Er21 [AUDIO]

id0902f6441600


Without Bose®

DESCRIPTION

Audio unit internal malfunction or audio unit protection function operates
DETECTION CONDITION
• Audio unit internal ECU (Power amplifier peripheral circuit) is faulted.
• Audio unit protection function operates due to short to ground in speaker wiring harness and speaker lead wire
POSSIBLE CAUSE
• Audio unit connector or terminals malfunction
• Speaker connector or terminals malfunction
• Open circuit in wiring harness between the following terminals:
― Audio unit terminal 1A—Front door speaker (LH) terminal B
― Audio unit terminal 1C—Front door speaker (LH) terminal A
― Audio unit terminal 1D—Front door speaker (RH) terminal B
― Audio unit terminal 1F—Front door speaker (RH) terminal A
― Audio unit terminal 1S—Rear door speaker (LH) terminal B
― Audio unit terminal 1U—Rear door speaker (LH) terminal A
― Audio unit terminal 1V—Rear door speaker (RH) terminal B
― Audio unit terminal 1X—Rear door speaker (RH) terminal A
• Short to ground in wiring harness between the following terminals:
― Audio unit terminal 1A—Front door speaker (LH) terminal B
― Audio unit terminal 1C—Front door speaker (LH) terminal A
― Audio unit terminal 1D—Front door speaker (RH) terminal B
― Audio unit terminal 1F—Front door speaker (RH) terminal A
― Audio unit terminal 1S—Rear door speaker (LH) terminal B
― Audio unit terminal 1U—Rear door speaker (LH) terminal A
― Audio unit terminal 1V—Rear door speaker (RH) terminal B
― Audio unit terminal 1X—Rear door speaker (RH) terminal A
• Speaker malfunction
• Audio unit malfunction

Diagnostic Procedure

Step

Inspection

Action
1
INSPECT AUDIO UNIT CONNECTOR AND TERMINALS
• Switch the ignition to off.
• Disconnect the negative battery cable.
• Disconnect the audio unit connector.
• Inspect the connector and terminals (corrosion, damage, pin disconnection).
• Is there any malfunction?
Yes
Repair or replace the connector or terminals, then go to Step 6.
No
Go to the next step.
2
INSPECT SPEAKER CONNECTOR AND TERMINALS
• Disconnect the speaker connector.
• Inspect the connector and terminals (corrosion, damage, pin disconnection).
• Is there any malfunction?
Yes
Repair or replace the connector or terminals, then go to Step 6.
No
Go to the next step.
3
INSPECT SPEAKER CIRCUIT FOR OPEN CIRCUIT
• Audio unit and speaker connector is disconnected.
• Inspect for continuity between the following terminals (wiring harness-side):
― Audio unit terminal 1A—Front door speaker (LH) terminal B
― Audio unit terminal 1C—Front door speaker (LH) terminal A
― Audio unit terminal 1D—Front door speaker (RH) terminal B
― Audio unit terminal 1F—Front door speaker (RH) terminal A
― Audio unit terminal 1S—Rear door speaker (LH) terminal B
― Audio unit terminal 1U—Rear door speaker (LH) terminal A
― Audio unit terminal 1V—Rear door speaker (RH) terminal B
― Audio unit terminal 1X—Rear door speaker (RH) terminal A
• Is there continuity?
Yes
Go to the next step.
No
Repair or replace the wiring harness for a possible open circuit, then go to Step 6.
4
INSPECT SPEAKER CIRCUIT FOR SHORT TO GROUND
• Inspect for continuity between the following terminals (wiring harness-side) and body ground:
― Speaker terminal B
― Speaker terminal A
• Is there continuity?
Yes
Repair or replace the wiring harness for a possible short to ground, then go to Step 6.
No
Go to the next step.
5
INSPECT SPEAKER
• Switch the ignition to off.
• Inspect the speaker. (See FRONT DOOR SPEAKER INSPECTION.) (See REAR DOOR SPEAKER INSPECTION.)
• Is there any malfunction?
Yes
Replace the speaker, then go to the next step.
(See FRONT DOOR SPEAKER REMOVAL/INSTALLATION.)
(See REAR DOOR SPEAKER REMOVAL/INSTALLATION.)
No
Go to the next step.
6
CONFIRM AUDIO UNIT DTC
• Clear the DTC from the audio unit memory. (See CLEARING DTC [AUDIO].)
• Perform the audio unit DTC inspection. (See DTC INSPECTION [AUDIO].)
• Is the same DTC present?
Yes
Replace the audio unit, then go to the next step.
(See AUDIO UNIT REMOVAL/INSTALLATION.)
No
Go to the next step.
7
VERIFY THAT NO OTHER DTCs ARE RECORDED
• Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [AUDIO].)
No
DTC troubleshooting completed.


With Bose®

DESCRIPTION

Audio unit internal malfunction or audio unit protection function operates
DETECTION CONDITION
• Audio unit internal ECU (Power amplifier peripheral circuit) is faulted.
• Audio unit protection function operates due to short to ground in speaker circuit
POSSIBLE CAUSE
• Audio unit connector or terminals malfunction
• Audio amplifier connector or terminals malfunction
• Open circuit in wiring harness between the following terminals:
― Audio unit terminal 1A—Audio amplifier terminal 1L
― Audio unit terminal 1C—Audio amplifier terminal 1J
― Audio unit terminal 1D—Audio amplifier terminal 1K
― Audio unit terminal 1F—Audio amplifier terminal 1I
• Short to ground in wiring harness between the following terminals:
― Audio unit terminal 1A—Audio amplifier terminal 1L
― Audio unit terminal 1C—Audio amplifier terminal 1J
― Audio unit terminal 1D—Audio amplifier terminal 1K
― Audio unit terminal 1F—Audio amplifier terminal 1I
• Audio unit malfunction

Diagnostic Procedure

Step

Inspection

Action
1
INSPECT AUDIO UNIT CONNECTOR AND TERMINALS
• Switch the ignition to off.
• Disconnect the negative battery cable.
• Disconnect the audio unit connector.
• Inspect the connector and terminals (corrosion, damage, pin disconnection).
• Is there any malfunction?
Yes
Repair or replace the connector or terminals, then go to Step 5.
No
Go to the next step.
2
INSPECT AUDIO AMPLIFIER CONNECTOR AND TERMINALS
• Disconnect the audio amplifier connector.
• Inspect the connector and terminals (corrosion, damage, pin disconnection).
• Is there any malfunction?
Yes
Repair or replace the connector or terminals, then go to Step 5.
No
Go to the next step.
3
INSPECT AUDIO AMPLIFIER CIRCUIT FOR OPEN CIRCUIT
• Audio unit and audio amplifier connector is disconnected.
• Inspect for continuity between the following terminals (wiring harness-side):
― Audio unit terminal 1A—Audio amplifier terminal 1L
― Audio unit terminal 1C—Audio amplifier terminal 1J
― Audio unit terminal 1D—Audio amplifier terminal 1K
― Audio unit terminal 1F—Audio amplifier terminal 1I
• Is there continuity?
Yes
Go to the next step.
No
Repair or replace the wiring harness for a possible open circuit, then go to Step 5.
4
INSPECT AUDIO AMPLIFIER CIRCUIT FOR SHORT TO GROUND
• Inspect for continuity between the following terminals (wiring harness-side) and body ground:
― Audio amplifier terminal 1L
― Audio amplifier terminal 1J
― Audio amplifier terminal 1K
― Audio amplifier terminal 1I
• Is there continuity?
Yes
Repair or replace the wiring harness for a possible short to ground, then go to the next step.
No
Go to the next step.
5
CONFIRM AUDIO UNIT DTC
• Clear the DTC from the audio unit memory. (See CLEARING DTC [AUDIO].)
• Perform the audio unit DTC inspection. (See DTC INSPECTION [AUDIO].)
• Is the same DTC present?
Yes
Replace the audio unit, then go to the next step.
(See AUDIO UNIT REMOVAL/INSTALLATION.)
No
Go to the next step.
6
VERIFY THAT NO OTHER DTCs ARE RECORDED
• Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [AUDIO].)
No
DTC troubleshooting completed.