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

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2014 - Mazda6 - Body and Accessories

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

Without Bose®


Description	Audio unit internal malfunction
Detection condition	Audio unit (circuit around power amplifier) malfunction detected Audio unit protection function operates due to short to ground in speaker wiring harness and speaker lead wire
Fail-safe function	Output to speakers stops
Possible cause	Audio unit connector or terminal malfunction Speaker connector or terminal malfunction Open circuit in wiring harness between the following terminals: Audio unit terminal 1A and front door speaker (LH) terminal C Audio unit terminal 1C and front door speaker (LH) terminal B Audio unit terminal 1D and front door speaker (RH) terminal C Audio unit terminal 1F and front door speaker (RH) terminal B Audio unit terminal 1S and rear door speaker (LH) terminal C Audio unit terminal 1U and rear door speaker (LH) terminal B Audio unit terminal 1V and rear door speaker (RH) terminal C Audio unit terminal 1X and rear door speaker (RH) terminal B Short to ground in wiring harness between the following terminals: Audio unit terminal 1A and front door speaker (LH) terminal C Audio unit terminal 1C and front door speaker (LH) terminal B Audio unit terminal 1D and front door speaker (RH) terminal C Audio unit terminal 1F and front door speaker (RH) terminal B Audio unit terminal 1S and rear door speaker (LH) terminal C Audio unit terminal 1U and rear door speaker (LH) terminal B Audio unit terminal 1V and rear door speaker (RH) terminal C Audio unit terminal 1X and rear door speaker (RH) terminal B Speaker malfunction Audio unit malfunction

Diagnostic Procedure


Step	Inspection		Action
1	INSPECT AUDIO UNIT CONNECTOR CONDITION Switch the ignition off (LOCK). Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.5].) 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 6.
1		No	Go to the next step.
2	INSPECT SPEAKER CONNECTOR CONDITION Disconnect the speaker 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 6.
2		No	Go to the next step.
3	INSPECT SPEAKER CIRCUIT FOR OPEN CIRCUIT Audio unit connector and speaker connector are disconnected. Inspect for continuity between the following terminals (vehicle wiring harness). Audio unit terminal 1A and front door speaker (LH) terminal C Audio unit terminal 1C and front door speaker (LH) terminal B Audio unit terminal 1D and front door speaker (RH) terminal C Audio unit terminal 1F and front door speaker (RH) terminal B Audio unit terminal 1S and rear door speaker (LH) terminal C Audio unit terminal 1U and front door speaker (LH) terminal B Audio unit terminal 1V and rear door speaker (RH) terminal C Audio unit terminal 1X and rear door speaker (RH) terminal B Is there continuity?	Yes	Go to the next step.
3		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 1A and front door speaker (LH) terminal C Audio unit terminal 1C and front door speaker (LH) terminal B Audio unit terminal 1D and front door speaker (RH) terminal C Audio unit terminal 1F and front door speaker (RH) terminal B Audio unit terminal 1S and rear door speaker (LH) terminal C Audio unit terminal 1U and front door speaker (LH) terminal B Audio unit terminal 1V and rear door speaker (RH) terminal C Audio unit terminal 1X and rear door speaker (RH) terminal B 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 6.
4	INSPECT SPEAKER CIRCUIT FOR SHORT TO GROUND Inspect for continuity between the following wiring harness terminals (vehicle wiring harness side) and body ground. Speaker terminal C Speaker terminal B 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). Speaker terminal C Speaker terminal B 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 6.
4		No	Go to the next step.
5	INSPECT SPEAKERS Inspect the speakers. (See FRONT DOOR SPEAKER INSPECTION.) (See REAR DOOR SPEAKER INSPECTION.) Is there any malfunctioning part?	Yes	Replace the speaker, then go to Step 6. (See FRONT DOOR SPEAKER REMOVAL/INSTALLATION.) (See REAR DOOR SPEAKER REMOVAL/INSTALLATION.)
5		No	Go to the next step.
6	VERIFY THAT REPAIRS HAVE BEEN COMPLETED Reconnect all the disconnected connectors. Connect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.5].) 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.)
6		No	Go to the next step.
7	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].)
7		No	DTC troubleshooting completed.

With Bose®


Description	Audio unit internal malfunction
Detection condition	Audio unit (circuit around power amplifier) malfunction detected Audio unit protection function operates due to short to ground in speaker wiring harness and speaker lead wire
Fail-safe function	Output to speakers stops
Possible cause	Audio unit connector or terminal malfunction Speaker connector or terminal malfunction Open circuit in wiring harness between the following terminals: Audio unit terminal 1A and audio amplifier terminal 1O Audio unit terminal 1C and audio amplifier terminal 1P Audio unit terminal 1D and audio amplifier terminal 1M Audio unit terminal 1F and audio amplifier terminal 1N Audio unit terminal 1S and audio amplifier terminal 1K Audio unit terminal 1U and audio amplifier terminal 1L Audio unit terminal 1V and audio amplifier terminal 1I Audio unit terminal 1X and audio amplifier terminal 1J Short to ground in wiring harness between the following terminals: Audio unit terminal 1A and audio amplifier terminal 1O Audio unit terminal 1C and audio amplifier terminal 1P Audio unit terminal 1D and audio amplifier terminal 1M Audio unit terminal 1F and audio amplifier terminal 1N Audio unit terminal 1S and audio amplifier terminal 1K Audio unit terminal 1U and audio amplifier terminal 1L Audio unit terminal 1V and audio amplifier terminal 1I Audio unit terminal 1X and audio amplifier terminal 1J Speaker malfunction Audio unit malfunction

Diagnostic Procedure


Step	Inspection		Action
1	INSPECT AUDIO UNIT CONNECTOR CONDITION Switch the ignition off (LOCK). Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.5].) 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 5.
1		No	Go to the next step.
2	INSPECT AUDIO AMPLIFIER CONNECTOR CONDITION Disconnect the audio amplifier 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 5.
2		No	Go to the next step.
3	INSPECT AUDIO AMPLIFIER CIRCUIT FOR OPEN CIRCUIT Audio unit connector and audio amplifier connector are disconnected. Inspect for continuity between the following terminals (vehicle wiring harness). Audio unit terminal 1A and audio amplifier terminal 1O Audio unit terminal 1C and audio amplifier terminal 1P Audio unit terminal 1D and audio amplifier terminal 1M Audio unit terminal 1F and audio amplifier terminal 1N Audio unit terminal 1S and audio amplifier terminal 1K Audio unit terminal 1U and audio amplifier terminal 1L Audio unit terminal 1V and audio amplifier terminal 1I Audio unit terminal 1X and audio amplifier terminal 1J Is there continuity?	Yes	Go to the next step.
3		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 1A and audio amplifier terminal 1O Audio unit terminal 1C and audio amplifier terminal 1P Audio unit terminal 1D and audio amplifier terminal 1M Audio unit terminal 1F and audio amplifier terminal 1N Audio unit terminal 1S and audio amplifier terminal 1K Audio unit terminal 1U and audio amplifier terminal 1L Audio unit terminal 1V and audio amplifier terminal 1I Audio unit terminal 1X and audio amplifier terminal 1J 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 5.
4	INSPECT AUDIO AMPLIFIER CIRCUIT FOR SHORT TO GROUND Inspect for continuity between the following wiring harness terminals (vehicle wiring harness side) and body ground. Audio amplifier terminal 1O Audio amplifier terminal 1P Audio amplifier terminal 1M Audio amplifier terminal 1N Audio amplifier terminal 1K Audio amplifier terminal 1L Audio amplifier terminal 1I Audio amplifier terminal 1J 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 amplifier terminal 1O Audio amplifier terminal 1P Audio amplifier terminal 1M Audio amplifier terminal 1N Audio amplifier terminal 1K Audio amplifier terminal 1L Audio amplifier terminal 1I Audio amplifier terminal 1J 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.
4		No	Go to the next step.
5	VERIFY THAT REPAIRS HAVE BEEN COMPLETED Reconnect all the disconnected connectors. Connect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.5].) 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.)
5		No	Go to the next step.
6	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].)
6		No	DTC troubleshooting completed.

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