NO SOUND OUTPUT IN ALL MODES [ENTERTAINMENT SYSTEM [WITH CENTER DISPLAY]]

id0903l8060500

With Bose ^® (L.H.D.)

Description	NO SOUND OUTPUT IN ALL MODES
	•  Sound is not output from speakers even if any mode is selected •  Noise interference occurs in sound from speakers in any selected mode
Possible Causes	•  Effects of non-genuine, after-market electrical components •  Connector poor contact or terminal damage •  Tuner and amp unit (TAU) ACC power supply circuit malfunction ―  Short circuit to ground in wiring harness between TAU terminal 2F and AUDIO1 15 A fuse ―  AUDIO1 15A fuse malfunction ―  Open circuit in wiring harness between TAU terminal 2F and AUDIO1 15 A fuse •  Open circuit in wiring harness between the following terminals: ―  TAU terminal 2A and body ground ―  Audio amplifier terminal 3B and body ground •  TAU malfunction •  Connectivity master unit (CMU) malfunction •  Speaker malfunction ―  Speaker malfunction •  Front door speaker (LH) malfunction •  Tweeter (LH) malfunction •  Front door speaker (RH) malfunction •  Tweeter (RH) malfunction •  Rear door speaker (LH) malfunction •  Rear door speaker (RH) malfunction •  Front center speaker malfunction •  Rear speaker (LH) malfunction •  Rear speaker (RH) malfunction •  Base-box malfunction ―  Open circuit, or short to ground in wiring harness between the following terminals: •  Audio amplifier terminal 3C and front door speaker (LH) terminal C •  Audio amplifier terminal 3D and front door speaker (LH) terminal B •  Audio amplifier terminal 3C and tweeter (LH) terminal B •  Audio amplifier terminal 3D and tweeter (LH) terminal A •  Audio amplifier terminal 3H and front door speaker (RH) terminal C •  Audio amplifier terminal 3G and front door speaker (RH) terminal B •  Audio amplifier terminal 3H and tweeter (RH) terminal B •  Audio amplifier terminal 3G and tweeter (RH) terminal A •  Audio amplifier terminal 2C and rear door speaker (LH) terminal B •  Audio amplifier terminal 2E and rear door speaker (LH) terminal C •  Audio amplifier terminal 2M and rear door speaker (RH) terminal C •  Audio amplifier terminal 2K and rear door speaker (RH) terminal B •  Audio amplifier terminal 2G and front center speaker terminal B •  Audio amplifier terminal 2I and front center speaker terminal A •  Audio amplifier terminal 2O and rear speaker (LH) terminal B •  Audio amplifier terminal 2P and rear speaker (LH) terminal A •  Audio amplifier terminal 2O and rear speaker (RH) terminal B •  Audio amplifier terminal 2P and rear speaker (RH) terminal A •  Audio amplifier terminal 3E and base-box terminal B •  Audio amplifier terminal 3F and base-box terminal A

Diagnostic Procedure

Note

•  The malfunction may be caused by a non-genuine, after-market electrical component. If a non-genuine, after-market electrical component has been installed and it cannot be determined whether the malfunction cause is due to the non-genuine, after-market electrical component or not, more time may be required to perform the malfunction diagnosis. (See FOREWORD [ENTERTAINMENT SYSTEM [WITH CENTER DISPLAY]].)

Step	Inspection		Action
1	VERIFY AFTER-MARKET ELECTRICAL COMPONENT INSTALLATION CONDITION •  Verify if a non-genuine, after-market electrical component is installed. •  Has a non-genuine, after-market electrical component been installed?	Yes	Go to the next step.
		No	Go to Step 3.
2	VERIFY IF MALFUNCTION CAUSE IS AFTER-MARKET ELECTRICAL COMPONENT INSTALLATION •  Disconnect the non-genuine, after-market electrical component connectors. •  Verify if the malfunction symptom recurs as stated by the customer. •  Does the malfunction recur?	Yes	Go to the next step.
		No	Explain to the customer that the malfunction occurred due to the after-market electrical component installation.
3	VERIFY MALFUNCTION SYMPTOM •  Switch the ignition to ACC or ON (engine off or on). •  Launch the on-board diagnostic assist function. (See DIAGNOSTIC ASSIST FUNCTION [CONNECTIVITY MASTER UNIT].) •  Select assist code “94”. •  Press the [ENTER] and verify that the sound is output from each speaker. •  Is sound output from each speaker in the order?	Yes	•  System is normal. •  Due to the possibility that sound is not output in some modes, verify the malfunction in the symptom troubleshooting chart and perform the other applicable malfunction diagnosis. (See NO SOUND OUTPUT IN MULTIPLE MODES [ENTERTAINMENT SYSTEM [WITH CENTER DISPLAY]].)
		No	No sound is produced from all speakers •  Go to the next step. No sound is produced from some speakers •  Go to Step 12.
4	INSPECT TAU CONNECTOR •  Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION.) •  Disconnect the TAU 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 15.
5	INSPECT AUDIO AMPLIFIER CONNECTOR •  Disconnect the audio amplifier 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 15.
6	INSPECT CMU CONNECTOR •  Disconnect the CMU 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 15.
7	INSPECT TAU ACC POWER SUPPLY VOLTAGE •  Verify that the TAU connector is disconnected. •  Reconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION.) •  Switch the ignition to ACC or ON (engine off or on). •  Measure the voltage at TAU terminal 2T (vehicle wiring harness side). •  Is the voltage B+?	Yes	Go to the next step.
		No	Inspect the AUDIO1 15A fuse. •  If the fuse is blown: ―  Refer to the wiring diagram and verify if there is a common connector between AUDIO1 15A fuse and the TAU terminal 2T. If there is a common connector: •  Inspect the common connector and terminals for corrosion, damage, or disconnection and the common wiring harnesses for short to ground to determine the malfunctioning location. •  Repair or replace the malfunctioning location. If there is no common connector: •  Repair or replace the wiring harness which is shorted to ground. •  Replace the fuse. •  If the fuse is damaged: ―  Replace the fuse. •  If the fuse is normal: ―  Refer to the wiring diagram and verify if there is a common connector between ACC relay and the TAU terminal 2T. If there is a common connector: •  Inspect the common connector and terminals for corrosion, damage, or disconnection and the common wiring harnesses for an open circuit to determine the malfunctioning location. •  Repair or replace the malfunctioning location. If there is no common connector: •  Repair or replace the wiring harness which has an open circuit. Go to Step 15.
8	VERIFY IF MALFUNCTION CAUSE IS OPEN CIRCUIT IN WIRING HARNESS BETWEEN TAU AND BODY GROUND •  Verify that the TAU connector is disconnected. •  Inspect the wiring harness for continuity between the following terminals (vehicle wiring harness side). ―  TAU terminal 2A and body ground •  Is there continuity?	Yes	Go to the next step.
		No	•  Refer to the wiring diagram and verify if there is a common connector between the following terminals. ―  TAU terminal 2A and body ground If there is a common connector: •  Inspect the common connector and terminals for corrosion, damage, or disconnection and the common wiring harnesses for an open circuit to determine the malfunctioning location. •  Repair or replace the malfunctioning location. If there is no common connector: •  Repair or replace the wiring harness which has an open circuit. •  Go to Step 15.
9	VERIFY IF MALFUNCTION CAUSE IS OPEN CIRCUIT IN WIRING HARNESS BETWEEN AUDIO AMPLIFIER AND BODY GROUND •  Verify that the audio amplifier connectors are disconnected. •  Inspect the wiring harness for continuity between the following terminals (vehicle wiring harness side). ―  Audio amplifier terminal 3B and body ground •  Is there continuity?	Yes	Go to the next step.
		No	•  Refer to the wiring diagram and verify if there is a common connector between the following terminals. ―  Audio amplifier terminal 3B and body ground If there is a common connector: •  Inspect the common connector and terminals for corrosion, damage, or disconnection and the common wiring harnesses for an open circuit to determine the malfunctioning location. •  Repair or replace the malfunctioning location. If there is no common connector: •  Repair or replace the wiring harness which has an open circuit. •  Go to Step 15.
10	DETERMINE IF MALFUNCTION CAUSE IS AUDIO AMPLIFIER •  Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION.) •  Replace the audio amplifier. (See AUDIO AMPLIFIER REMOVAL/INSTALLATION.) •  Connect all the connectors. •  Reconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION.) •  Switch the ignition to ACC or ON (engine off or on). •  Launch the on-board diagnostic assist function. (See DIAGNOSTIC ASSIST FUNCTION [CONNECTIVITY MASTER UNIT].) •  Select assist code “94”. •  Press the [ENTER] and verify that the sound is output from each speaker. •  Is sound output from each speaker in the order?	Yes	Go to Step 15.
		No	Go to the next step.
11	DETERMINE IF MALFUNCTION CAUSE IS TAU •  Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION.) •  Replace the TAU. (See TUNER AND AMP UNIT (TAU) REMOVAL/INSTALLATION.) •  Connect all the connectors. •  Reconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION.) •  Switch the ignition to ACC or ON (engine off or on). •  Launch the on-board diagnostic assist function. (See DIAGNOSTIC ASSIST FUNCTION [CONNECTIVITY MASTER UNIT].) •  Select assist code “94”. •  Press the [ENTER] and verify that the sound is output from each speaker. •  Is sound output from each speaker in the order?	Yes	Go to Step 15.
		No	Replace the CMU, then go to Step 15. (See CONNECTIVITY MASTER UNIT (CMU) REMOVAL/INSTALLATION.)
12	INSPECT SPEAKERS •  Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION.) •  Inspect the malfunctioning speaker. (See FRONT DOOR SPEAKER INSPECTION.) (See TWEETER INSPECTION.) (See REAR DOOR SPEAKER INSPECTION.) (See FRONT CENTER SPEAKER INSPECTION.) (See REAR SPEAKER INSPECTION.) (See REAR DOOR SPEAKER INSPECTION.) •  Is the speaker resistance normal?	Yes	Go to the next step.
		No	Replace the malfunctioning speaker, then go to Step 15. (See FRONT DOOR SPEAKER REMOVAL/INSTALLATION.) (See REAR DOOR SPEAKER REMOVAL/INSTALLATION.) (See FRONT CENTER SPEAKER REMOVAL/INSTALLATION.) (See REAR SPEAKER REMOVAL/INSTALLATION.)
13	INSPECT SPEAKER CIRCUIT FOR OPEN CIRCUIT •  Disconnect the connector of the malfunctioning speaker and the audio amplifier connector. •  Verify the continuity of the wiring harness between the following terminals (vehicle wiring harness side) of the speakers which are malfunctioning. ―  Audio amplifier terminal 3C and front door speaker (LH) terminal C ―  Audio amplifier terminal 3D and front door speaker (LH) terminal B ―  Audio amplifier terminal 3C and tweeter (LH) terminal B ―  Audio amplifier terminal 3D and tweeter (LH) terminal A ―  Audio amplifier terminal 3H and front door speaker (RH) terminal C ―  Audio amplifier terminal 3G and front door speaker (RH) terminal B ―  Audio amplifier terminal 3H and tweeter (RH) terminal B ―  Audio amplifier terminal 3G and tweeter (RH) terminal A ―  Audio amplifier terminal 2C and rear door speaker (LH) terminal B ―  Audio amplifier terminal 2E and rear door speaker (LH) terminal C ―  Audio amplifier terminal 2M and rear door speaker (RH) terminal C ―  Audio amplifier terminal 2K and rear door speaker (RH) terminal B ―  Audio amplifier terminal 2G and front center speaker terminal B ―  Audio amplifier terminal 2I and front center speaker terminal A ―  Audio amplifier terminal 2O and rear speaker (LH) terminal B ―  Audio amplifier terminal 2P and rear speaker (LH) terminal A ―  Audio amplifier terminal 2O and rear speaker (RH) terminal B ―  Audio amplifier terminal 2P and rear speaker (RH) terminal A ―  Audio amplifier terminal 3E and base-box terminal B ―  Audio amplifier terminal 3F and base-box terminal A •  Is there continuity?	Yes	Go to the next step.
		No	•  Refer to the wiring diagram and verify if there is a common connector between the following terminals. ―  Audio amplifier terminal 3C and front door speaker (LH) terminal C ―  Audio amplifier terminal 3D and front door speaker (LH) terminal B ―  Audio amplifier terminal 3C and tweeter (LH) terminal B ―  Audio amplifier terminal 3D and tweeter (LH) terminal A ―  Audio amplifier terminal 3H and front door speaker (RH) terminal C ―  Audio amplifier terminal 3G and front door speaker (RH) terminal B ―  Audio amplifier terminal 3H and tweeter (RH) terminal B ―  Audio amplifier terminal 3G and tweeter (RH) terminal A ―  Audio amplifier terminal 2C and rear door speaker (LH) terminal B ―  Audio amplifier terminal 2E and rear door speaker (LH) terminal C ―  Audio amplifier terminal 2M and rear door speaker (RH) terminal C ―  Audio amplifier terminal 2K and rear door speaker (RH) terminal B ―  Audio amplifier terminal 2G and front center speaker terminal B ―  Audio amplifier terminal 2I and front center speaker terminal A ―  Audio amplifier terminal 2O and rear speaker (LH) terminal B ―  Audio amplifier terminal 2P and rear speaker (LH) terminal A ―  Audio amplifier terminal 2O and rear speaker (RH) terminal B ―  Audio amplifier terminal 2P and rear speaker (RH) terminal A ―  Audio amplifier terminal 3E and base-box terminal B ―  Audio amplifier terminal 3F and base-box terminal A If there is a common connector: ―  Inspect the common connector and terminals for corrosion, damage, or disconnection and the common wiring harnesses for an open circuit to determine the malfunctioning location. ―  Repair or replace the malfunctioning location. If there is no common connector: ―  Repair or replace the wiring harness which has an open circuit. •  Go to Step 15.
14	INSPECT SPEAKER CIRCUIT FOR SHORT TO GROUND •  Verify that the connector of the malfunctioning speaker and the audio amplifier connector are disconnected. •  Inspect for continuity between the following terminals (vehicle wiring harness side) of the speakers which are malfunctioning and body ground. ―  Front door speaker (LH) terminal C ―  Front door speaker (LH) terminal B ―  Tweeter (LH) terminal B ―  Tweeter (LH) terminal A ―  Front door speaker (RH) terminal C ―  Front door speaker (RH) terminal B ―  Tweeter (RH) terminal B ―  Tweeter (RH) terminal A ―  Rear door speaker (LH) terminal B ―  Rear door speaker (LH) terminal C ―  Rear door speaker (RH) terminal C ―  Rear door speaker (RH) terminal B ―  Front center speaker terminal B ―  Front center speaker terminal A ―  Rear speaker (LH) terminal B ―  Rear speaker (LH) terminal A ―  Rear speaker (RH) terminal B ―  Rear speaker (RH) terminal A ―  Base-box terminal A ―  Base-box terminal B •  Is there continuity?	Yes	•  Refer to the wiring diagram and verify if there is a common connector between the following terminals. ―  Audio amplifier terminal 3C and front door speaker (LH) terminal C ―  Audio amplifier terminal 3D and front door speaker (LH) terminal B ―  Audio amplifier terminal 3C and tweeter (LH) terminal B ―  Audio amplifier terminal 3D and tweeter (LH) terminal A ―  Audio amplifier terminal 3H and front door speaker (RH) terminal C ―  Audio amplifier terminal 3G and front door speaker (RH) terminal B ―  Audio amplifier terminal 3H and tweeter (RH) terminal B ―  Audio amplifier terminal 3G and tweeter (RH) terminal A ―  Audio amplifier terminal 2C and rear door speaker (LH) terminal B ―  Audio amplifier terminal 2E and rear door speaker (LH) terminal C ―  Audio amplifier terminal 2M and rear door speaker (RH) terminal C ―  Audio amplifier terminal 2K and rear door speaker (RH) terminal B ―  Audio amplifier terminal 2G and front center speaker terminal B ―  Audio amplifier terminal 2I and front center speaker terminal A ―  Audio amplifier terminal 2O and rear speaker (LH) terminal B ―  Audio amplifier terminal 2P and rear speaker (LH) terminal A ―  Audio amplifier terminal 2O and rear speaker (RH) terminal B ―  Audio amplifier terminal 2P and rear speaker (RH) terminal A ―  Audio amplifier terminal 3E and base-box terminal B ―  Audio amplifier terminal 3F and base-box terminal A If there is a common connector: ―  Inspect the common connector and terminals for corrosion, damage, or disconnection and the common wiring harnesses for short to ground to determine the malfunctioning location. ―  Repair or replace the malfunctioning location. If there is no common connector: ―  Repair or replace the wiring harness which is shorted to ground. •  Go to the next step.
		No	Go to the next step.
15	VERIFY IF MALFUNCTION CAUSE IS CORRECTED •  Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION.) •  Connect all the connectors. •  Reconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION.) •  Switch the ignition to ACC or ON (engine off or on). •  Launch the on-board diagnostic assist function. (See DIAGNOSTIC ASSIST FUNCTION [CONNECTIVITY MASTER UNIT].) •  Select assist code “94”. •  Press the [ENTER] and verify that the sound is output from each speaker. •  Is sound output from each speaker in the order?	Yes	Troubleshooting completed (explain the contents of the servicing to the customer).
		No	Verify the malfunction symptom in the symptom troubleshooting chart and perform the other applicable malfunction diagnosis. (See SYMPTOM TROUBLESHOOTING [ENTERTAINMENT SYSTEM [WITH CENTER DISPLAY]].)

With Bose ^® (R.H.D.)

Description	NO SOUND OUTPUT IN ALL MODES
	•  Sound is not output from speakers even if any mode is selected •  Noise interference occurs in sound from speakers in any selected mode
Possible Causes	•  Effects of non-genuine, after-market electrical components •  Connector poor contact or terminal damage •  Tuner and amp unit (TAU) ACC power supply circuit malfunction ―  Short circuit to ground in wiring harness between TAU terminal 2T and AUDIO1 15 A fuse ―  AUDIO1 15A fuse malfunction ―  Open circuit in wiring harness between TAU terminal 2T and AUDIO1 15 A fuse •  Open circuit in wiring harness between the following terminals: ―  TAU terminal 2A and body ground ―  Audio amplifier terminal 3B and body ground •  TAU malfunction •  Connectivity master unit (CMU) malfunction •  Speaker malfunction ―  Speaker malfunction •  Front door speaker (LH) malfunction •  Tweeter (LH) malfunction •  Front door speaker (RH) malfunction •  Tweeter (RH) malfunction •  Rear door speaker (LH) malfunction •  Rear door speaker (RH) malfunction •  Front side speaker (LH) malfunction •  Front side speaker (RH) malfunction •  Front center speaker malfunction •  Rear speaker (LH) malfunction •  Rear speaker (RH) malfunction •  Base-box malfunction ―  Open circuit, or short to ground in wiring harness between the following terminals: •  Audio amplifier terminal 3G and front door speaker (LH) terminal B •  Audio amplifier terminal 3H and front door speaker (LH) terminal C •  Audio amplifier terminal 3H and tweeter (LH) terminal B •  Audio amplifier terminal 3G and tweeter (LH) terminal A •  Audio amplifier terminal 3D and front door speaker (RH) terminal B •  Audio amplifier terminal 3C and front door speaker (RH) terminal C •  Audio amplifier terminal 3D and tweeter (RH) terminal A •  Audio amplifier terminal 3C and tweeter (RH) terminal B •  Audio amplifier terminal 2K and rear door speaker (LH) terminal B •  Audio amplifier terminal 2M and rear door speaker (LH) terminal C •  Audio amplifier terminal 2E and rear door speaker (RH) terminal C •  Audio amplifier terminal 2C and rear door speaker (RH) terminal B •  Audio amplifier terminal 2G and front center speaker terminal B •  Audio amplifier terminal 2I and front center speaker terminal A •  Audio amplifier terminal 2O and rear speaker (LH) terminal B •  Audio amplifier terminal 2P and rear speaker (LH) terminal A •  Audio amplifier terminal 2O and rear speaker (RH) terminal B •  Audio amplifier terminal 2P and rear speaker (RH) terminal A •  Audio amplifier terminal 3E and base-box terminal B •  Audio amplifier terminal 3F and base-box terminal A

Diagnostic Procedure

Note

•  The malfunction may be caused by a non-genuine, after-market electrical component. If a non-genuine, after-market electrical component has been installed and it cannot be determined whether the malfunction cause is due to the non-genuine, after-market electrical component or not, more time may be required to perform the malfunction diagnosis. (See FOREWORD [ENTERTAINMENT SYSTEM [WITH CENTER DISPLAY]].)

Step	Inspection		Action
1	VERIFY AFTER-MARKET ELECTRICAL COMPONENT INSTALLATION CONDITION •  Verify if a non-genuine, after-market electrical component is installed. •  Has a non-genuine, after-market electrical component been installed?	Yes	Go to the next step.
		No	Go to Step 3.
2	VERIFY IF MALFUNCTION CAUSE IS AFTER-MARKET ELECTRICAL COMPONENT INSTALLATION •  Disconnect the non-genuine, after-market electrical component connectors. •  Verify if the malfunction symptom recurs as stated by the customer. •  Does the malfunction recur?	Yes	Go to the next step.
		No	Explain to the customer that the malfunction occurred due to the after-market electrical component installation.
3	VERIFY MALFUNCTION SYMPTOM •  Switch the ignition to ACC or ON (engine off or on). •  Launch the on-board diagnostic assist function. (See DIAGNOSTIC ASSIST FUNCTION [CONNECTIVITY MASTER UNIT].) •  Select assist code “94”. •  Press the [ENTER] and verify that the sound is output from each speaker. •  Is sound output from each speaker in the order?	Yes	•  System is normal. •  Due to the possibility that sound is not output in some modes, verify the malfunction in the symptom troubleshooting chart and perform the other applicable malfunction diagnosis. (See NO SOUND OUTPUT IN MULTIPLE MODES [ENTERTAINMENT SYSTEM [WITH CENTER DISPLAY]].)
		No	No sound is produced from all speakers •  Go to the next step. No sound is produced from some speakers •  Go to Step 12.
4	INSPECT TAU CONNECTOR •  Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION.) •  Disconnect the TAU 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 15.
5	INSPECT AUDIO AMPLIFIER CONNECTOR •  Disconnect the audio amplifier 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 15.
6	INSPECT CMU CONNECTOR •  Disconnect the CMU 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 15.
7	INSPECT TAU ACC POWER SUPPLY VOLTAGE •  Verify that the TAU connector is disconnected. •  Reconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION.) •  Switch the ignition to ACC or ON (engine off or on). •  Measure the voltage at TAU terminal 2T (vehicle wiring harness side). •  Is the voltage B+?	Yes	Go to the next step.
		No	Inspect the AUDIO1 15A fuse. •  If the fuse is blown: ―  Refer to the wiring diagram and verify if there is a common connector between AUDIO1 15A fuse and the TAU terminal 2T. If there is a common connector: •  Inspect the common connector and terminals for corrosion, damage, or disconnection and the common wiring harnesses for short to ground to determine the malfunctioning location. •  Repair or replace the malfunctioning location. If there is no common connector: •  Repair or replace the wiring harness which is shorted to ground. •  Replace the fuse. •  If the fuse is damaged: ―  Replace the fuse. •  If the fuse is normal: ―  Refer to the wiring diagram and verify if there is a common connector between ACC relay and the TAU terminal 2T. If there is a common connector: •  Inspect the common connector and terminals for corrosion, damage, or disconnection and the common wiring harnesses for an open circuit to determine the malfunctioning location. •  Repair or replace the malfunctioning location. If there is no common connector: •  Repair or replace the wiring harness which has an open circuit. Go to Step 15.
8	VERIFY IF MALFUNCTION CAUSE IS OPEN CIRCUIT IN WIRING HARNESS BETWEEN TAU AND BODY GROUND •  Verify that the TAU connector is disconnected. •  Inspect the wiring harness for continuity between the following terminals (vehicle wiring harness side). ―  TAU terminal 2A and body ground •  Is there continuity?	Yes	Go to the next step.
		No	•  Refer to the wiring diagram and verify if there is a common connector between the following terminals. ―  TAU terminal 2A and body ground If there is a common connector: •  Inspect the common connector and terminals for corrosion, damage, or disconnection and the common wiring harnesses for an open circuit to determine the malfunctioning location. •  Repair or replace the malfunctioning location. If there is no common connector: •  Repair or replace the wiring harness which has an open circuit. •  Go to Step 15.
9	VERIFY IF MALFUNCTION CAUSE IS OPEN CIRCUIT IN WIRING HARNESS BETWEEN AUDIO AMPLIFIER AND BODY GROUND •  Verify that the audio amplifier connectors are disconnected. •  Inspect the wiring harness for continuity between the following terminals (vehicle wiring harness side). ―  Audio amplifier terminal 3B and body ground •  Is there continuity?	Yes	Go to the next step.
		No	•  Refer to the wiring diagram and verify if there is a common connector between the following terminals. ―  Audio amplifier terminal 3B and body ground If there is a common connector: •  Inspect the common connector and terminals for corrosion, damage, or disconnection and the common wiring harnesses for an open circuit to determine the malfunctioning location. •  Repair or replace the malfunctioning location. If there is no common connector: •  Repair or replace the wiring harness which has an open circuit. •  Go to Step 15.
10	DETERMINE IF MALFUNCTION CAUSE IS AUDIO AMPLIFIER •  Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION.) •  Replace the audio amplifier. (See AUDIO AMPLIFIER REMOVAL/INSTALLATION.) •  Connect all the connectors. •  Reconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION.) •  Switch the ignition to ACC or ON (engine off or on). •  Launch the on-board diagnostic assist function. (See DIAGNOSTIC ASSIST FUNCTION [CONNECTIVITY MASTER UNIT].) •  Select assist code “94”. •  Press the [ENTER] and verify that the sound is output from each speaker. •  Is sound output from each speaker in the order?	Yes	Go to Step 15.
		No	Go to the next step.
11	DETERMINE IF MALFUNCTION CAUSE IS TAU •  Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION.) •  Replace the TAU. (See TUNER AND AMP UNIT (TAU) REMOVAL/INSTALLATION.) •  Connect all the connectors. •  Reconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION.) •  Switch the ignition to ACC or ON (engine off or on). •  Launch the on-board diagnostic assist function. (See DIAGNOSTIC ASSIST FUNCTION [CONNECTIVITY MASTER UNIT].) •  Select assist code “94”. •  Press the [ENTER] and verify that the sound is output from each speaker. •  Is sound output from each speaker in the order?	Yes	Go to Step 15.
		No	Replace the CMU, then go to Step 15. (See CONNECTIVITY MASTER UNIT (CMU) REMOVAL/INSTALLATION.)
12	INSPECT SPEAKERS •  Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION.) •  Inspect the malfunctioning speaker. (See FRONT DOOR SPEAKER INSPECTION.) (See TWEETER INSPECTION.) (See REAR DOOR SPEAKER INSPECTION.) (See FRONT CENTER SPEAKER INSPECTION.) (See REAR SPEAKER INSPECTION.) (See REAR DOOR SPEAKER INSPECTION.) •  Is the speaker resistance normal?	Yes	Go to the next step.
		No	Replace the malfunctioning speaker, then go to Step 15. (See FRONT DOOR SPEAKER REMOVAL/INSTALLATION.) (See REAR DOOR SPEAKER REMOVAL/INSTALLATION.) (See FRONT CENTER SPEAKER REMOVAL/INSTALLATION.) (See REAR SPEAKER REMOVAL/INSTALLATION.)
13	INSPECT SPEAKER CIRCUIT FOR OPEN CIRCUIT •  Disconnect the connector of the malfunctioning speaker and the audio amplifier connector. •  Verify the continuity of the wiring harness between the following terminals (vehicle wiring harness side) of the speakers which are malfunctioning. ―  Audio amplifier terminal 3G and front door speaker (LH) terminal B ―  Audio amplifier terminal 3H and front door speaker (LH) terminal C ―  Audio amplifier terminal 3H and tweeter (LH) terminal B ―  Audio amplifier terminal 3G and tweeter (LH) terminal A ―  Audio amplifier terminal 3D and front door speaker (RH) terminal B ―  Audio amplifier terminal 3C and front door speaker (RH) terminal C ―  Audio amplifier terminal 3D and tweeter (RH) terminal A ―  Audio amplifier terminal 3C and tweeter (RH) terminal B ―  Audio amplifier terminal 2K and rear door speaker (LH) terminal B ―  Audio amplifier terminal 2M and rear door speaker (LH) terminal C ―  Audio amplifier terminal 2E and rear door speaker (RH) terminal C ―  Audio amplifier terminal 2C and rear door speaker (RH) terminal B ―  Audio amplifier terminal 2G and front center speaker terminal B ―  Audio amplifier terminal 2I and front center speaker terminal A ―  Audio amplifier terminal 2O and rear speaker (LH) terminal B ―  Audio amplifier terminal 2P and rear speaker (LH) terminal A ―  Audio amplifier terminal 2O and rear speaker (RH) terminal B ―  Audio amplifier terminal 2P and rear speaker (RH) terminal A ―  Audio amplifier terminal 3E and base-box terminal B ―  Audio amplifier terminal 3F and base-box terminal A •  Is there continuity?	Yes	Go to the next step.
		No	•  Refer to the wiring diagram and verify if there is a common connector between the following terminals. ―  Audio amplifier terminal 3G and front door speaker (LH) terminal B ―  Audio amplifier terminal 3H and front door speaker (LH) terminal C ―  Audio amplifier terminal 3H and tweeter (LH) terminal B ―  Audio amplifier terminal 3G and tweeter (LH) terminal A ―  Audio amplifier terminal 3D and front door speaker (RH) terminal B ―  Audio amplifier terminal 3C and front door speaker (RH) terminal C ―  Audio amplifier terminal 3D and tweeter (RH) terminal A ―  Audio amplifier terminal 3C and tweeter (RH) terminal B ―  Audio amplifier terminal 2K and rear door speaker (LH) terminal B ―  Audio amplifier terminal 2M and rear door speaker (LH) terminal C ―  Audio amplifier terminal 2E and rear door speaker (RH) terminal C ―  Audio amplifier terminal 2C and rear door speaker (RH) terminal B ―  Audio amplifier terminal 2G and front center speaker terminal B ―  Audio amplifier terminal 2I and front center speaker terminal A ―  Audio amplifier terminal 2O and rear speaker (LH) terminal B ―  Audio amplifier terminal 2P and rear speaker (LH) terminal A ―  Audio amplifier terminal 2O and rear speaker (RH) terminal B ―  Audio amplifier terminal 2P and rear speaker (RH) terminal A ―  Audio amplifier terminal 3E and base-box terminal B ―  Audio amplifier terminal 3F and base-box terminal A If there is a common connector: ―  Inspect the common connector and terminals for corrosion, damage, or disconnection and the common wiring harnesses for an open circuit to determine the malfunctioning location. ―  Repair or replace the malfunctioning location. If there is no common connector: ―  Repair or replace the wiring harness which has an open circuit. •  Go to Step 15.
14	INSPECT SPEAKER CIRCUIT FOR SHORT TO GROUND •  Verify that the connector of the malfunctioning speaker and the audio amplifier connector are disconnected. •  Inspect for continuity between the following terminals (vehicle wiring harness side) of the speakers which are malfunctioning and body ground. ―  Front door speaker (LH) terminal B ―  Front door speaker (LH) terminal C ―  Tweeter (LH) terminal B ―  Tweeter (LH) terminal A ―  Front door speaker (RH) terminal B ―  Front door speaker (RH) terminal C ―  Tweeter (RH) terminal A ―  Tweeter (RH) terminal B ―  Rear door speaker (LH) terminal B ―  Rear door speaker (LH) terminal C ―  Rear door speaker (RH) terminal C ―  Rear door speaker (RH) terminal B ―  Front center speaker terminal B ―  Front center speaker terminal A ―  Rear speaker (LH) terminal B ―  Rear speaker (LH) terminal A ―  Rear speaker (RH) terminal B ―  Rear speaker (RH) terminal A ―  Rear speaker (RH) terminal A ―  Base-box terminal B ―  Base-box terminal A •  Is there continuity?	Yes	•  Refer to the wiring diagram and verify if there is a common connector between the following terminals. ―  Audio amplifier terminal 3G and front door speaker (LH) terminal B ―  Audio amplifier terminal 3H and front door speaker (LH) terminal C ―  Audio amplifier terminal 3H and tweeter (LH) terminal B ―  Audio amplifier terminal 3G and tweeter (LH) terminal A ―  Audio amplifier terminal 3D and front door speaker (RH) terminal B ―  Audio amplifier terminal 3C and front door speaker (RH) terminal C ―  Audio amplifier terminal 3D and tweeter (RH) terminal A ―  Audio amplifier terminal 3C and tweeter (RH) terminal B ―  Audio amplifier terminal 2K and rear door speaker (LH) terminal B ―  Audio amplifier terminal 2M and rear door speaker (LH) terminal C ―  Audio amplifier terminal 2E and rear door speaker (RH) terminal C ―  Audio amplifier terminal 2C and rear door speaker (RH) terminal B ―  Audio amplifier terminal 2G and front center speaker terminal B ―  Audio amplifier terminal 2I and front center speaker terminal A ―  Audio amplifier terminal 2O and rear speaker (LH) terminal B ―  Audio amplifier terminal 2P and rear speaker (LH) terminal A ―  Audio amplifier terminal 2O and rear speaker (RH) terminal B ―  Audio amplifier terminal 2P and rear speaker (RH) terminal A ―  Audio amplifier terminal 3E and base-box terminal B ―  Audio amplifier terminal 3F and base-box terminal A If there is a common connector: ―  Inspect the common connector and terminals for corrosion, damage, or disconnection and the common wiring harnesses for short to ground to determine the malfunctioning location. ―  Repair or replace the malfunctioning location. If there is no common connector: ―  Repair or replace the wiring harness which is shorted to ground. •  Go to the next step.
		No	Go to the next step.
15	VERIFY IF MALFUNCTION CAUSE IS CORRECTED •  Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION.) •  Connect all the connectors. •  Reconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION.) •  Switch the ignition to ACC or ON (engine off or on). •  Launch the on-board diagnostic assist function. (See DIAGNOSTIC ASSIST FUNCTION [CONNECTIVITY MASTER UNIT].) •  Select assist code “94”. •  Press the [ENTER] and verify that the sound is output from each speaker. •  Is sound output from each speaker in the order?	Yes	Troubleshooting completed (explain the contents of the servicing to the customer).
		No	Verify the malfunction symptom in the symptom troubleshooting chart and perform the other applicable malfunction diagnosis. (See SYMPTOM TROUBLESHOOTING [ENTERTAINMENT SYSTEM [WITH CENTER DISPLAY]].)

Without Bose^®

Description	NO SOUND OUTPUT IN ALL MODES
	•  Sound is not output from speakers even if any mode is selected •  Noise interference occurs in sound from speakers in any selected mode
Possible Causes	•  Effects of non-genuine, after-market electrical components •  Connector poor contact or terminal damage •  Tuner and amp unit (TAU) ACC power supply circuit malfunction ―  Short circuit to ground in wiring harness between TAU terminal 2T and AUDIO1 15 A fuse ―  AUDIO1 15A fuse malfunction ―  Open circuit in wiring harness between TAU terminal 2T and AUDIO1 15 A fuse •  Open circuit in wiring harness between the following terminals: ―  TAU terminal 2A and body ground •  TAU malfunction •  Connectivity master unit (CMU) malfunction •  Open circuit in wiring harness between the following terminals: ―  TAU terminal 2N and front door speaker (LH) terminal B ―  TAU terminal 2P and front door speaker (LH) terminal C ―  TAU terminal 2N and tweeter (LH) terminal A ―  TAU terminal 2P and tweeter (LH) terminal B ―  TAU terminal 2Q and front door speaker (RH) terminal C ―  TAU terminal 2O and front door speaker (RH) terminal B ―  TAU terminal 2Q and tweeter (RH) terminal B ―  TAU terminal 2O and tweeter (RH) terminal A ―  TAU terminal 2J and rear door speaker (LH) terminal B ―  TAU terminal 2L and rear door speaker (LH) terminal C ―  TAU terminal 2M and rear door speaker (RH) terminal C ―  TAU terminal 2K and rear door speaker (RH) terminal B

Diagnostic Procedure

Note

•  The malfunction may be caused by a non-genuine, after-market electrical component. If a non-genuine, after-market electrical component has been installed and it cannot be determined whether the malfunction cause is due to the non-genuine, after-market electrical component or not, more time may be required to perform the malfunction diagnosis. (See FOREWORD [ENTERTAINMENT SYSTEM [WITH CENTER DISPLAY]].)

Step	Inspection		Action
1	VERIFY AFTER-MARKET ELECTRICAL COMPONENT INSTALLATION CONDITION •  Verify if a non-genuine, after-market electrical component is installed. •  Has a non-genuine, after-market electrical component been installed?	Yes	Go to the next step.
		No	Go to Step 3.
2	VERIFY IF MALFUNCTION CAUSE IS AFTER-MARKET ELECTRICAL COMPONENT INSTALLATION •  Disconnect the non-genuine, after-market electrical component connectors. •  Verify if the malfunction symptom recurs as stated by the customer. •  Does the malfunction recur?	Yes	Go to the next step.
		No	Explain to the customer that the malfunction occurred due to the after-market electrical component installation.
3	VERIFY MALFUNCTION SYMPTOM •  Switch the ignition to ACC or ON (engine off or on). •  Launch the on-board diagnostic assist function. (See DIAGNOSTIC ASSIST FUNCTION [CONNECTIVITY MASTER UNIT].) •  Select assist code “94”. •  Press the [ENTER] and verify that the sound is output from each speaker. •  Is sound output from each speaker in the order?	Yes	•  System is normal. •  Due to the possibility that sound is not output in some modes, verify the malfunction in the symptom troubleshooting chart and perform the other applicable malfunction diagnosis. (See NO SOUND OUTPUT IN MULTIPLE MODES [ENTERTAINMENT SYSTEM [WITH CENTER DISPLAY]].)
		No	•  No sound is produced from all speakers ―  Go to the next step. •  No sound is produced from some speakers ―  Go to Step 9.
4	INSPECT TAU CONNECTOR •  Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION.) •  Disconnect the TAU 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 11.
5	INSPECT CMU CONNECTOR •  Disconnect the CMU 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 11.
6	INSPECT TAU ACC POWER SUPPLY VOLTAGE •  Verify that the TAU connector is disconnected. •  Reconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION.) •  Switch the ignition to ACC or ON (engine off or on). •  Measure the voltage at TAU terminal 2T (vehicle wiring harness side). •  Is the voltage B+?	Yes	Go to the next step.
		No	Inspect the AUDIO1 15A fuse. •  If the fuse is blown: ―  Refer to the wiring diagram and verify if there is a common connector between AUDIO1 15A fuse and the TAU terminal 2T. If there is a common connector: •  Inspect the common connector and terminals for corrosion, damage, or disconnection and the common wiring harnesses for short to ground to determine the malfunctioning location. •  Repair or replace the malfunctioning location. If there is no common connector: •  Repair or replace the wiring harness which is shorted to ground. •  Replace the fuse. •  If the fuse is damaged: ―  Replace the fuse. •  If the fuse is normal: ―  Refer to the wiring diagram and verify if there is a common connector between ACC relay and the TAU terminal 2F. If there is a common connector: •  Inspect the common connector and terminals for corrosion, damage, or disconnection and the common wiring harnesses for an open circuit to determine the malfunctioning location. •  Repair or replace the malfunctioning location. If there is no common connector: •  Repair or replace the wiring harness which has an open circuit. Go to Step 11.
7	INSPECT WIRING HARNESS BETWEEN TAU AND BODY GROUND FOR OPEN CIRCUIT •  Verify that the TAU connector is disconnected. •  Inspect for continuity between the following terminals (vehicle wiring harness side) and body ground. ―  TAU terminal 2A •  Is there continuity?	Yes	Go to the next step.
		No	•  Refer to the wiring diagram and verify if there is a common connector between the following terminals and body ground. ―  TAU terminal 2A If there is a common connector: •  Inspect the common connector and terminals for corrosion, damage, or disconnection and the common wiring harnesses for an open circuit to determine the malfunctioning location. •  Repair or replace the malfunctioning location. If there is no common connector: •  Repair or replace the wiring harness which has an open circuit. •  Go to Step 11.
8	DETERMINE IF MALFUNCTION CAUSE IS TAU •  Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION.) •  Replace the TAU. (See TUNER AND AMP UNIT (TAU) REMOVAL/INSTALLATION.) •  Connect all the connectors. •  Reconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION.) •  Switch the ignition to ACC or ON (engine off or on). •  Launch the on-board diagnostic assist function. (See DIAGNOSTIC ASSIST FUNCTION [CONNECTIVITY MASTER UNIT].) •  Select assist code “94”. •  Press the [ENTER] and verify that the sound is output from each speaker. •  Is sound output from each speaker in the order?	Yes	Go to Step 11.
		No	Replace the CMU, then go to Step 11. (See CONNECTIVITY MASTER UNIT (CMU) REMOVAL/INSTALLATION.)
9	INSPECT SPEAKERS •  Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION.) •  Inspect the malfunctioning speaker. (See FRONT DOOR SPEAKER INSPECTION.) (See REAR DOOR SPEAKER INSPECTION.) (See TWEETER INSPECTION.) •  Is the speaker resistance normal?	Yes	Go to the next step.
		No	Replace the malfunctioning speaker, then go to Step 11. (See FRONT DOOR SPEAKER REMOVAL/INSTALLATION.) (See REAR DOOR SPEAKER REMOVAL/INSTALLATION.) (See TWEETER REMOVAL/INSTALLATION.)
10	INSPECT SPEAKER CIRCUIT FOR OPEN CIRCUIT •  Disconnect the connector of the malfunctioning speaker and the TAU connector. •  Verify the continuity of the wiring harness between the following terminals (vehicle wiring harness side) of the speakers which are malfunctioning. ―  TAU terminal 2N and front door speaker (LH) terminal B ―  TAU terminal 2P and front door speaker (LH) terminal C ―  TAU terminal 2N and tweeter (LH) terminal A ―  TAU terminal 2P and tweeter (LH) terminal B ―  TAU terminal 2Q and front door speaker (RH) terminal C ―  TAU terminal 2O and front door speaker (RH) terminal B ―  TAU terminal 2Q and tweeter (RH) terminal B ―  TAU terminal 2O and tweeter (RH) terminal A ―  TAU terminal 2J and rear door speaker (LH) terminal B ―  TAU terminal 2L and rear door speaker (LH) terminal C ―  TAU terminal 2M and rear door speaker (RH) terminal C ―  TAU terminal 2K and rear door speaker (RH) terminal B •  Is there continuity?	Yes	Go to the next step.
		No	•  Refer to the wiring diagram and verify if there is a common connector between the following terminals. ―  TAU terminal 2N and front door speaker (LH) terminal B ―  TAU terminal 2P and front door speaker (LH) terminal C ―  TAU terminal 2N and tweeter (LH) terminal A ―  TAU terminal 2P and tweeter (LH) terminal B ―  TAU terminal 2Q and front door speaker (RH) terminal C ―  TAU terminal 2O and front door speaker (RH) terminal B ―  TAU terminal 2Q and tweeter (RH) terminal B ―  TAU terminal 2O and tweeter (RH) terminal A ―  TAU terminal 2J and rear door speaker (LH) terminal B ―  TAU terminal 2L and rear door speaker (LH) terminal C ―  TAU terminal 2M and rear door speaker (RH) terminal C ―  TAU terminal 2K and rear door speaker (RH) terminal B If there is a common connector: ―  Inspect the common connector and terminals for corrosion, damage, or disconnection and the common wiring harnesses for an open circuit to determine the malfunctioning location. ―  Repair or replace the malfunctioning location. If there is no common connector: ―  Repair or replace the wiring harness which has an open circuit. •  Go to the next step.
11	VERIFY IF MALFUNCTION CAUSE IS CORRECTED •  Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION.) •  Connect all the connectors. •  Reconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION.) •  Switch the ignition to ACC or ON (engine off or on). •  Launch the on-board diagnostic assist function. (See DIAGNOSTIC ASSIST FUNCTION [CONNECTIVITY MASTER UNIT].) •  Select assist code “94”. •  Press the [ENTER] and verify that the sound is output from each speaker. •  Is sound output from each speaker in the order?	Yes	Troubleshooting completed (explain the contents of the servicing to the customer).
		No	Verify the malfunction symptom in the symptom troubleshooting chart and perform the other applicable malfunction diagnosis. (See SYMPTOM TROUBLESHOOTING [ENTERTAINMENT SYSTEM [WITH CENTER DISPLAY]].)