NO SOUND OUTPUT IN MULTIPLE MODES [ENTERTAINMENT SYSTEM (WITH CENTER DISPLAY) (TYPE-A)]

id160309060600

Description
NO SOUND OUTPUT IN MULTIPLE MODES
•  Radio, 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
―  Connectivity master unit (CMU) terminal 1Z—Tuner and amp unit (TAU) terminal 1R
―  Connectivity master unit (CMU) terminal 1AA—Tuner and amp unit (TAU) terminal 1S
―  Connectivity master unit (CMU) terminal 1AB—Tuner and amp unit (TAU) terminal 1T
•  Short to ground in wiring harness between the following terminals:
―  Connectivity master unit (CMU) terminal 1Y—Tuner and amp unit (TAU) terminal 1Q
―  Connectivity master unit (CMU) terminal 1Z—Tuner and amp unit (TAU) terminal 1R
―  Connectivity master unit (CMU) terminal 1AA—Tuner and amp unit (TAU) terminal 1S
―  Connectivity master unit (CMU) terminal 1AB—Tuner and amp unit (TAU) terminal 1T
•  Short to power supply in wiring harness between the following terminals:
―  Connectivity master unit (CMU) terminal 1Y—Tuner and amp unit (TAU) terminal 1Q
―  Connectivity master unit (CMU) terminal 1Z—Tuner and amp unit (TAU) terminal 1R
―  Connectivity master unit (CMU) terminal 1AA—Tuner and amp unit (TAU) terminal 1S
―  Connectivity master unit (CMU) terminal 1AB—Tuner and amp unit (TAU) terminal 1T
•  Tuner and amp unit (TAU) malfunction
•  Connectivity master unit (CMU) malfunction

Diagnostic Procedure

Step

Inspection

Action
1
INSPECT TUNER AND AMP UNIT (TAU) CONNECTOR
•  Switch the ignition off.
•  Disconnect the negative battery terminal.
(Refer to the [NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION] in the workshop manual.)
•  Disconnect the tuner and amp unit (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 7.
2
INSPECT CONNECTIVITY MASTER UNIT (CMU) CONNECTOR
•  Disconnect the connectivity master unit (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 7.
3
VERIFY IF MALFUNCTION CAUSE IS OPEN CIRCUIT IN WIRING HARNESS BETWEEN CONNECTIVITY MASTER UNIT (CMU) AND TUNER AND AMP UNIT (TAU)
•  Verify that the connectivity master unit (CMU) and tuner and amp unit (TAU) connectors are disconnected.
•  Inspect the wiring harness for continuity between the following terminals (vehicle wiring harness side).
―  Connectivity master unit (CMU) terminal 1Y—Tuner and amp unit (TAU) terminal 1Q
―  Connectivity master unit (CMU) terminal 1Z—Tuner and amp unit (TAU) terminal 1R
―  Connectivity master unit (CMU) terminal 1AA—Tuner and amp unit (TAU) terminal 1S
―  Connectivity master unit (CMU) terminal 1AB—Tuner and amp unit (TAU) terminal 1T
•  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.
•  Connectivity master unit (CMU) terminal 1Y—Tuner and amp unit (TAU) terminal 1Q
•  Connectivity master unit (CMU) terminal 1Z—Tuner and amp unit (TAU) terminal 1R
•  Connectivity master unit (CMU) terminal 1AA—Tuner and amp unit (TAU) terminal 1S
•  Connectivity master unit (CMU) terminal 1AB—Tuner and amp unit (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 CONNECTIVITY MASTER UNIT (CMU) AND TUNER AND AMP UNIT (TAU)
•  Verify that the connectivity master unit (CMU) and tuner and amp unit (TAU) connectors are disconnected.
•  Inspect for continuity between the following wiring harness terminals (vehicle wiring harness side) and body ground.
―  Tuner and amp unit (TAU) terminal 1Q
―  Tuner and amp unit (TAU) terminal 1R
―  Tuner and amp unit (TAU) terminal 1S
―  Tuner and amp unit (TAU) terminal 1T
•  Is there continuity?
Yes
Refer to the wiring diagram and verify if there is a common connector between the following terminals.
•  Connectivity master unit (CMU) terminal 1Y—Tuner and amp unit (TAU) terminal 1Q
•  Connectivity master unit (CMU) terminal 1Z—Tuner and amp unit (TAU) terminal 1R
•  Connectivity master unit (CMU) terminal 1AA—Tuner and amp unit (TAU) terminal 1S
•  Connectivity master unit (CMU) terminal 1AB—Tuner and amp unit (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.
No
Go to the next step.
5
VERIFY IF MALFUNCTION CAUSE IS SHORT TO POWER SUPPLY IN WIRING HARNESS BETWEEN CONNECTIVITY MASTER UNIT (CMU) AND TUNER AND AMP UNIT (TAU)
•  Verify that the connectivity master unit (CMU) and tuner and amp unit (TAU) connectors are disconnected.
•  Reconnect the negative battery terminal.
(Refer to the [NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION] in the workshop manual.)
•  Switch the ignition to ACC or ON (engine off or on).
•  Measure the voltage at the following terminals (vehicle wiring harness side).
―  Tuner and amp unit (TAU) terminal 1Q
―  Tuner and amp unit (TAU) terminal 1R
―  Tuner and amp unit (TAU) terminal 1S
―  Tuner and amp unit (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.
•  Connectivity master unit (CMU) terminal 1Y—Tuner and amp unit (TAU) terminal 1Q
•  Connectivity master unit (CMU) terminal 1Z—Tuner and amp unit (TAU) terminal 1R
•  Connectivity master unit (CMU) terminal 1AA—Tuner and amp unit (TAU) terminal 1S
•  Connectivity master unit (CMU) terminal 1AB—Tuner and amp unit (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 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 7.
No
Go to the next step.
6
DETERMINE IF MALFUNCTION CAUSE IS TUNER AND AMP UNIT (TAU)
•  Disconnect the negative battery terminal.
(Refer to the [NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION] in the workshop manual.)
•  Replace the tuner and amp unit (TAU).
(Refer to the [TUNER AND AMP UNIT (TAU) REMOVAL/INSTALLATION [TYPE-A]] in the workshop manual.)
•  Connect all the connectors.
•  Reconnect the negative battery terminal.
(Refer to the [NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION] in the workshop manual.)
•  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.)
No
Replace the connectivity master unit (CMU), then go to the next step.
(Refer to the [CONNECTIVITY MASTER UNIT (CMU) REMOVAL/INSTALLATION] in the workshop manual.)
7
VERIFY IF MALFUNCTION CAUSE IS CORRECTED
•  Switch the ignition off.
•  Disconnect the negative battery terminal.
(Refer to the [NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION] in the workshop manual.)
•  Connect all the connectors.
•  Reconnect the negative battery terminal.
(Refer to the [NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION] in the workshop manual.)
•  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.)
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) (TYPE-A) (E)].)