No.3 ADDRESSEE'S VOICE VOLUME TOO LOW, OR NOISE INTERRUPTS CALL [Bluetooth SYSTEM (HANDS-FREE TELEPHONE (HF/TEL) SYSTEM)]SM2446161
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)

Audio unit

26:Er81

Car-navigation unit

Device code 26/error code 81
Possible cause
• Malfunction in the audio system
― Open or short circuit in the wiring harness between the Bluetooth unit and the speaker through the audio amplifier (with Bose ®)
― 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
― Poor connection in the connector
• Bluetooth unit does not receive the vehicle speed signal
― CAN communication error
• Bluetooth unit malfunction
• The volume of the Hands-free telephone system is set at a low level or zero.
• Problem in the cellular phone
― Vehicle is in a place where signal transmission is weak
― Bluetooth does not operate
― A cellular phone other than a Hands-free telephone system-enabled models is used.


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 audio system on-board diagnostic.
• Is U0498:68/26:Er81/device code26, error code81 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 amplifier (16-pin) terminal 4D
― Between Bluetooth unit (28-pin) terminal J and audio amplifier (16-pin) terminal 4B
― Between Bluetooth unit (28-pin) terminal L and shield wire
(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.