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

id0903l8060600

Description

NO SOUND OUTPUT IN MULTIPLE MODES

Radio, CD, AUX audio is output, but no Bluetooth^® audio, Internet radio, USB audio, and guidance voice

Possible Causes

•  Connector poor contact or terminal damage

•  Open circuit in wiring harness between the following terminals:

―  Connectivity master unit (CMU) terminal 1Y and tuner and amp unit (TAU) terminal 1Q

―  CMU terminal 1Z and TAU terminal 1R

―  CMU terminal 1AA and TAU terminal 1S

―  CMU terminal 1AB and TAU terminal 1T

•  Short to ground in wiring harness between the following terminals:

―  CMU terminal 1Y and TAU terminal 1Q

―  CMU terminal 1Z and TAU terminal 1R

―  CMU terminal 1AA and TAU terminal 1S

―  CMU terminal 1AB and TAU terminal 1T

•  Short to power supply in wiring harness between the following terminals:

―  CMU terminal 1Y and TAU terminal 1Q

―  CMU terminal 1Z and TAU terminal 1R

―  CMU terminal 1AA and TAU terminal 1S

―  CMU terminal 1AB and TAU terminal 1T

•  TAU malfunction

•  CMU malfunction

Diagnostic Procedure

Step	Inspection		Action
1	INSPECT TAU CONNECTOR • Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 1.5].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 2.2].) • 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.
1		No	Repair or replace the connector, then go to Step 7.
2	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.
2		No	Repair or replace the connector, then go to Step 7.
3	VERIFY IF MALFUNCTION CAUSE IS OPEN CIRCUIT IN WIRING HARNESS BETWEEN CMU AND TAU • Verify that the CMU and TAU connectors are disconnected. • Inspect the wiring harness for continuity between the following terminals (vehicle wiring harness side). ― CMU terminal 1Y and TAU terminal 1Q ― CMU terminal 1Z and TAU terminal 1R ― CMU terminal 1AA and TAU terminal 1S ― CMU terminal 1AB and TAU terminal 1T • 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. ― CMU terminal 1Y and TAU terminal 1Q ― CMU terminal 1Z and TAU terminal 1R ― CMU terminal 1AA and TAU terminal 1S ― CMU terminal 1AB and TAU terminal 1T 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 7.
4	VERIFY IF MALFUNCTION CAUSE IS SHORT TO GROUND IN WIRING HARNESS BETWEEN CMU AND TAU • Verify that the CMU and TAU connectors are disconnected. • Inspect for continuity between the following wiring harness terminals (vehicle wiring harness side) and body ground. ― TAU terminal 1Q ― TAU terminal 1R ― TAU terminal 1S ― TAU terminal 1T • Is there continuity?	Yes	• Refer to the wiring diagram and verify if there is a common connector between the following terminals. ― CMU terminal 1Y and TAU terminal 1Q ― CMU terminal 1Z and TAU terminal 1R ― CMU terminal 1AA and TAU terminal 1S ― CMU terminal 1AB and TAU terminal 1T 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 7.
4		No	Go to the next step.
5	VERIFY IF MALFUNCTION CAUSE IS SHORT TO POWER SUPPLY IN WIRING HARNESS BETWEEN CMU AND TAU • Verify that the CMU and TAU connectors are disconnected. • Reconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 1.5].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 2.2].) • Switch the ignition to ACC or ON (engine off or on). • Measure the voltage at the following terminals (vehicle wiring harness side). ― TAU terminal 1Q ― TAU terminal 1R ― TAU terminal 1S ― TAU terminal 1T • Is the voltage B+?	Yes	• Refer to the wiring diagram and verify if there is a common connector between the following terminals. ― CMU terminal 1Y and TAU terminal 1Q ― CMU terminal 1Z and TAU terminal 1R ― CMU terminal 1AA and TAU terminal 1S ― CMU terminal 1AB and TAU terminal 1T 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 is shorted to the power supply. • Go to Step 7.
5		No	Go to the next step.
6	DETERMINE IF MALFUNCTION CAUSE IS TAU • Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 1.5].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 2.2].) • 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 [MZR 1.6].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 1.5].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 2.2].) • Switch the ignition to ACC or ON (engine off or on). • Select the mode when the malfunction occurred by operating the center display or the commander switch. • Is audio output normally?	Yes	Go to the next step.
6		No	Replace the CMU, then go to the next step. (See CONNECTIVITY MASTER UNIT (CMU) REMOVAL/INSTALLATION.)
7	VERIFY IF MALFUNCTION CAUSE IS CORRECTED • Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 1.5].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 2.2].) • Connect all the connectors. • Reconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 1.5].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 2.2].) • Switch the ignition to ACC or ON (engine off or on). • Select the mode when the malfunction occurred by operating the center display or the commander switch. • Is audio output normally?	Yes	Troubleshooting completed. (Explain the contents of the servicing to the customer.)
7		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]].)