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]] .)

NO AUX AUDIO SOUND OUTPUT (ENTERTAINMENT SYSTEM - WITH CENTER DISPLAY) DIAGNOSTIC PROCEDURE

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.
1		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.
2		No	Explain to the customer that the malfunction occurred due to the after-market electrical component installation.
3	DETERMINE IF MALFUNCTION CAUSE IS EXTERNAL DEVICE Switch the ignition off. After obtaining the customer's consent, replace with an external media that was not used when the malfunction occurred. Switch the ignition to ACC or ON (engine off or on). Select the AUX audio mode by operating the commander switch or the center display. Is sound from the AUX audio output?	Yes	System is normal. (Explain to the customer that the external device or internal data has a malfunction)
3		No	Go to the next step.
4	INSPECT AUXILIARY JACK/USB PORT/SD CARD SLOT HUB CONNECTOR Switch the ignition off. Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION .) Disconnect the auxiliary jack/USB port/SD card slot hub 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.
4		No	Repair or replace the connector, then go to Step 12.
5	INSPECT TAU CONNECTOR 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.
5		No	Repair or replace the connector, then go to Step 12.
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.
6		No	Repair or replace the connector, then go to Step 12.
7	VERIFY IF MALFUNCTION CAUSE IS OPEN CIRCUIT IN WIRING HARNESS BETWEEN TAU AND AUXILIARY JACK/USB PORT/SD CARD SLOT HUB Verify that the TAU and the auxiliary jack/USB port/SD card slot hub connector are disconnected. Inspect the wiring harness for continuity between the following terminals (vehicle wiring harness side). TAU terminal 1L and auxiliary jack/USB port/SD card slot hub terminal 1C TAU terminal 1I and auxiliary jack/USB port/SD card slot hub terminal 1E TAU terminal 1K and auxiliary jack/USB port/SD card slot hub terminal 1G TAU terminal 1J and auxiliary jack/USB port/SD card slot hub terminal 1H Is there continuity?	Yes	Go to the next step.
7		No	Refer to the wiring diagram and verify if there is a common connector between the following terminals. TAU terminal 1L and auxiliary jack/USB port/SD card slot hub terminal 1C TAU terminal 1I and auxiliary jack/USB port/SD card slot hub terminal 1E TAU terminal 1K and auxiliary jack/USB port/SD card slot hub terminal 1G TAU terminal 1J and auxiliary jack/USB port/SD card slot hub terminal 1H 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	VERIFY IF MALFUNCTION CAUSE IS SHORT CIRCUIT TO GROUND IN WIRING HARNESS BETWEEN TAU AND AUXILIARY JACK/USB PORT/SD CARD SLOT HUB Verify that the TAU and the auxiliary jack/USB port/SD card slot hub connector are disconnected. Inspect for continuity between the following wiring harness terminals (vehicle wiring harness side) and body ground. Auxiliary jack/USB port/SD card slot hub terminal 1C Auxiliary jack/USB port/SD card slot hub terminal 1E Auxiliary jack/USB port/SD card slot hub terminal 1G Auxiliary jack/USB port/SD card slot hub terminal 1H Is there continuity?	Yes	Refer to the wiring diagram and verify if there is a common connector between the following terminals. TAU terminal 1L and auxiliary jack/USB port/SD card slot hub terminal 1C TAU terminal 1I and auxiliary jack/USB port/SD card slot hub terminal 1E TAU terminal 1K and auxiliary jack/USB port/SD card slot hub terminal 1G TAU terminal 1J and auxiliary jack/USB port/SD card slot hub terminal 1H 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 Step 12.
8		No	Go to the next step.
9	VERIFY IF MALFUNCTION CAUSE IS SHORT CIRCUIT TO POWER SUPPLY IN WIRING HARNESS BETWEEN TAU AND AUXILIARY JACK/USB PORT/SD CARD SLOT HUB Verify that the TAU and the auxiliary jack/USB port/SD card slot hub connector are 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 the following terminals (vehicle wiring harness side). Auxiliary jack/USB port/SD card slot hub terminal 1C Auxiliary jack/USB port/SD card slot hub terminal 1E Auxiliary jack/USB port/SD card slot hub terminal 1G Auxiliary jack/USB port/SD card slot hub terminal 1H Is the voltage B+?	Yes	Refer to the wiring diagram and verify if there is a common connector between the following terminals. TAU terminal 1L and auxiliary jack/USB port/SD card slot hub terminal 1C TAU terminal 1I and auxiliary jack/USB port/SD card slot hub terminal 1E TAU terminal 1K and auxiliary jack/USB port/SD card slot hub terminal 1G TAU terminal 1J and auxiliary jack/USB port/SD card slot hub terminal 1H 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 power supply 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 the power supply. Go to Step 12.
9		No	Go to the next step.
10	VERIFY IF MALFUNCTION CAUSE IS AUXILIARY JACK/USB PORT/SD CARD SLOT HUB Switch the ignition off. Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION .) Replace the auxiliary jack/USB port/SD card slot hub. (See AUXILIARY JACK/USB PORT/SD CARD SLOT HUB REMOVAL/INSTALLATION .) Connect all the connectors. Reconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION .) Connect the external device when the malfunction occurred. Switch the ignition to ACC or ON (engine off or on). Select the AUX audio mode by operating the commander switch or the center display. Is sound from the AUX audio output?	Yes	Troubleshooting completed. (Explain the contents of the servicing to the customer.)
10		No	Go to the next step.
11	VERIFY IF MALFUNCTION CAUSE IS TAU Switch the ignition off. 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 .) Connect the external device when the malfunction occurred. Switch the ignition to ACC or ON (engine off or on). Select the AUX audio mode by operating the commander switch or the center display. Is sound from the AUX audio output?	Yes	Troubleshooting completed. (Explain the contents of the servicing to the customer.)
11		No	Replace the CMU, then go to the next step. (See CONNECTIVITY MASTER UNIT (CMU) REMOVAL/INSTALLATION .)
12	VERIFY IF MALFUNCTION CAUSE IS CORRECTED Switch the ignition off. 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 .) Connect the external device when the malfunction occurred. Switch the ignition to ACC or ON (engine off or on). Select the AUX audio mode by operating the commander switch or the center display. Is sound from the AUX audio output?	Yes	Troubleshooting completed. (Explain the contents of the servicing to the customer.)
12		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]] .)