Possible DTC

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

Using the M-MDS

Not applicable

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

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 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.

• Between Bluetooth unit (28-pin) terminal 1J and audio unit (24-pin) terminal 2D

• Between Bluetooth unit (28-pin) terminal 1I and audio unit (24-pin) terminal 2C

• Between Bluetooth unit (28-pin) terminal 1N and audio unit (24-pin) terminal 2B

• Between Bluetooth unit (28-pin) terminal 1M and audio unit (24-pin) terminal 2A

• Are the harnesses and connector connections normal?

Yes

Go to the next step.

No

Refer to the wiring diagram and verify whether or not there is a common connector between buletooth unit and audio unit.

If there is a common connector:

• Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open or short circuit.

• Repair or replace the malfunctioning part.

If there is no common connector:

• Repair or replace the wiring harness which has an open or short circuit.

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.