No.3 ADDRESSEE'S VOICE VOLUME TOO LOW, OR NOISE INTERRUPTS CALL [Bluetooth SYSTEM (HANDS-FREE TELEPHONE (HF/TEL) SYSTEM)]

id0903h5844200

3

Addressee’s voice volume too low, or noise interrupts call

Possible DTC

Using the M-MDS

U0498:68

Without using M-MDS (On-board diagnostic test mode)

26:Er81
Possible cause
•  Problem in the cellular phone
―  A cellular phone other than a Hands-free telephone system-enabled models is used
―  Vehicle is in a place where signal transmission is weak
―  Bluetooth does not operate
•  The volume of the Hands-free telephone system is set at a low level or zero
•  Bluetooth unit does not receive the vehicle speed signal
―  CAN communication error
•  Malfunction in the audio system
―  Poor connection in the connector
―  Open or short circuit in the wiring harness between the Bluetooth unit and the speaker through the audio amplifier (with Bose® system)
―   Open or short circuit in the wiring harness between the Bluetooth unit and the speaker through the audio unit (without Bose®)
―  Steering switch (+) and/or related circuit malfunction
•  Bluetooth unit malfunction


Diagnostic procedure

•  When performing an asterisked (*) troubleshooting inspection, slightly shake the wiring harness and connectors while performing the inspection to discover whether poor contact points are the cause of any intermittent malfunction. If there is a problem, verify that the connectors, terminals and wiring harness are connected correctly and undamaged.

STEP

INSPECTION

ACTION
1
•  Verify if the customer’s cellular phone is a Hands-free telephone system-enabled model by referring to
http://www.mazdausa.com/MusaWeb/displayPage.action?
pageParameter=bluetoothHandsFreeSystem.
•  Is the customer’s cellular phone a Hands-free telephone system-enabled model?
Yes
Go to the next step.
No
Explain to the customer that the customer’s cellular phone is not a Hands-free telephone system-enabled model.
2
•  Verify the volume setting of the Hands-free telephone system.
•  Is the volume set at a low level or zero?
Yes
•  Verify if the malfunction symptom is eliminated after the volume is set to a higher level.
•  If the malfunction is not resolved, go to the next step.
•  If the malfunction is resolved, explain to the customer that the malfunction occurred due to an inappropriate volume setting.
No
Go to the next step.
3
•  Is the audio system sound output normal?
Yes
Go to the next step.
No
Perform the audio system troubleshooting procedure.
4
•  Can the audio volume be controlled using steering switch?
Yes
Go to the next step.
No
Inspect and repair the steering switch and related wiring harness.
5
•  Perform the Bluetooth system (hands-free telephone (HF/TEL) system) DTC inspection.
•   Is U0498:68/26:Er81 displayed?
Yes
Inspect and repair the audio system CAN communication.
No
Go to the next step.
6*
•  Inspect for open or short circuits in the following wiring harnesses and connectors, and inspect the connector connections.
(With Bose® system)
―  Between Bluetooth unit (28-pin) terminal I and audio unit (16-pin) terminal 2B
―  Between Bluetooth unit (28-pin) terminal J and audio unit (16-pin) terminal 2J
―  Between Bluetooth unit (28-pin) terminal L and shield wire (without SIRIUS satellite radio unit)
(Without Bose® system)
―  Between Bluetooth unit (28-pin) terminal M and audio unit (24-pin) terminal 2E
―  Between Bluetooth unit (28-pin) terminal N and audio unit (24-pin) terminal 2C
―  Between Bluetooth unit (28-pin) terminal L and shield wire
•  Are the harnesses and connector connections normal?
Yes
Go to the next step.
No
Repair or replace malfunctioning parts.
7
•  Make a call with the cellular phone without using Bluetooth system.
•  Does the same symptom appear?
Yes
Cellular phone related problem.
No
Go to the next step.
8
•  Call the hands-free cell phone using another cellular phone.
•  Does the same symptom appear?
Yes
Replace the Bluetooth unit.
(See Bluetooth UNIT REMOVAL/INSTALLATION.)
No
The cellular phone Bluetooth system is malfunctioning.