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

id0903l8060500

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 Without i-ELOOP ―  Short circuit to ground in wiring harness between DC-DC converter terminal K and TAU terminal 2F ―  Open circuit in wiring harness between DC-DC converter terminal K and TAU terminal 2F ―  RADIO 7.5A fuse malfunction ―  Ignition relay (ACC_STAB) malfunction With i-ELOOP ―  Short circuit to ground in wiring harness between battery and TAU terminal 2F ―  Open circuit in wiring harness between battery and TAU terminal 2F ―  Short circuit to ground in wiring harness between DC-DC converter (i-ELOOP) terminal 4A and TAU terminal 2F ―  Open circuit in wiring harness between DC-DC converter (i-ELOOP) terminal 4A and TAU terminal 2F ―  ACC relay malfunction ―  RADIO 7.5A fuse malfunction •  Open circuit in wiring harness between TAU terminal 2A and body ground •  Speaker malfunction ―  Malfunction of the following speakers. •  Front door speaker (LH) •  Front door speaker (RH) •  Tweeter (LH) •  Tweeter (RH) •  Rear door speaker (LH) •  Rear door speaker (RH) ―  Open circuit in wiring harness between the following terminals: •  TAU terminal 2P and front door speaker (LH) terminal C •  TAU terminal 2N and front door speaker (LH) terminal B •  TAU terminal 2P and tweeter (LH) terminal B •  TAU terminal 2N and tweeter (LH) terminal A •  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 2L and rear door speaker (LH) terminal C •  TAU terminal 2J and rear door speaker (LH) terminal B •  TAU terminal 2M and rear door speaker (RH) terminal C •  TAU terminal 2K and rear door speaker (RH) terminal B •  TAU malfunction •  Connectivity master unit (CMU) malfunction
System Wiring Diagram	am2zzw00014509

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 SYMPTOM TROUBLESHOOTING [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 10.
4	INSPECT TAU CONNECTOR •  Switch the ignition off. •  Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE 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 12.
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	Without i-ELOOP •  Go to the next step. With i-ELOOP •  Go to Step 7.
		No	Repair or replace the connector, then go to Step 12.
6	INSPECT TAU ACC POWER SUPPLY VOLTAGE •  Verify that the TAU connector is disconnected. •  Reconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.) •  Switch the ignition to ACC or ON (engine off or on). •  Measure the voltage at TAU terminal 2F (vehicle wiring harness side). •  Is the voltage B+?	Yes	Go to Step 8.
		No	Inspect the RADIO 7.5A fuse. •  If the fuse is blown: ―  Refer to the wiring diagram and verify if there is a common connector between RADIO 7.5A fuse 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 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 DC-DC converter terminal K and 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 12.
7	INSPECT TAU ACC POWER SUPPLY VOLTAGE •  Verify that the TAU connector is disconnected. •  Reconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.) •  Switch the ignition to ACC or ON (engine off or on). •  Measure the voltage at TAU terminal 2F (vehicle wiring harness side). •  Is the voltage B+?	Yes	Go to Step 8.
		No	Inspect the RADIO 7.5A fuse and IG2 30A fuse. •  If the fuse is blown: ―  Refer to the wiring diagram and verify if there is a common connector between IG2 30A fuse 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 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 the following terminals. •  DC-DC converter (i-ELOOP) terminal 4A and TAU terminal 2F •  Battery and 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 12.
8	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. Repair or replace the malfunctioning location. •  Repair or replace the wiring harness which has an open circuit. •  Go to Step 12.
9	DETERMINE IF MALFUNCTION CAUSE IS TAU •  Switch the ignition off. •  Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.) •  Replace the TAU. (See TUNER AND AMP UNIT (TAU) REMOVAL/INSTALLATION.) •  Connect all the connectors. •  Reconnect the negative battery cable. (See NEGATIVE BATTERY CABLE 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	Replace the CMU, then go to Step 12. (See CONNECTIVITY MASTER UNIT (CMU) REMOVAL/INSTALLATION.)
10	INSPECT SPEAKERS •  Switch the ignition off. •  Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE 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 12. (See FRONT DOOR SPEAKER REMOVAL/INSTALLATION.) (See REAR DOOR SPEAKER REMOVAL/INSTALLATION.) (See TWEETER REMOVAL/INSTALLATION.)
11	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 2P and front door speaker (LH) terminal C ―  TAU terminal 2N and front door speaker (LH) terminal B ―  TAU terminal 2P and tweeter (LH) terminal B ―  TAU terminal 2N and tweeter (LH) terminal A ―  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 2L and rear door speaker (LH) terminal C ―  TAU terminal 2J and rear door speaker (LH) terminal B ―  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 2P and front door speaker (LH) terminal C ―  TAU terminal 2N and front door speaker (LH) terminal B ―  TAU terminal 2P and tweeter (LH) terminal B ―  TAU terminal 2N and tweeter (LH) terminal A ―  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 2L and rear door speaker (LH) terminal C ―  TAU terminal 2J and rear door speaker (LH) terminal B ―  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.
12	VERIFY IF MALFUNCTION CAUSE IS CORRECTED •  Switch the ignition off. •  Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.) •  Connect all the connectors. •  Reconnect the negative battery cable. (See NEGATIVE BATTERY CABLE 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]].)