Possible DTC

Caller’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

• Influence due to vehicle driving conditions

• Noise while driving is loud (engine, tire noise, blower fan noise)

• Windows and/or sunroof are open

• Bluetooth unit does not receive the vehicle speed signal

• CAN communication error

• Malfunction in the microphone related parts

• Poor connection in the connector

• Open or short circuit in the wiring harness between the microphone and the Bluetooth unit

• Microphone malfunction

• Malfunction in the Hang-up/Pick-up/Talk button

• Poor connection in the connector

• Open or short circuit in the wiring harness between the Hang-up/Pick-up/Talk switch and the Bluetooth unit

• Hang-up/Pick-up/Talk button malfunction

• Malfunction in the audio system

• 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*

• 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.

3

• Does the symptom appear under following conditions?

• Windows and/or sunroof are open

• Noise while driving is loud (engine, tire noise, blower fan noise)

Yes

The system is normal.

(Influence due to vehicle driving conditions)

No

Go to the next step.

4

• 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.

5*

• Inspect for open or short circuits in the following wiring harnesses and connectors, and inspect the connector connections.

• Between microphone terminal A and audio unit terminal 2L

• Between microphone terminal A and Bluetooth unit terminal 1A

• Between microphone terminal B and audio unit terminal 2N

• Between microphone terminal B and Bluetooth unit terminal 1B

• Between microphone terminal C and audio unit terminal 2R

• Between microphone terminal D and audio unit terminal 2P

• Between microphone terminal E and audio unit terminal 2T

• 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 microphone and audio unit/buletooth 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.

6

• Inspect the following switches.

  (See STEERING SWITCH INSPECTION.)

• Hung-up button

• Pic-up button

• Talk button

• Are the switches normal?

Yes

Go to the next step.

No

Replace the steering switch.

(See STEERING SWITCH REMOVAL/INSTALLATION.)

7*

• Inspect for open or short circuits in the following wiring harnesses and connectors, and inspect the connector connections.

• Between clock spring terminal B and audio unit terminal 1H

• Between clock spring terminal E and audio unit terminal 1P

• 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 clock spring 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.

8

• 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.

9

• Call the hands-free cell phone using another cellular phone.

• Does the same symptom appear?

Yes

Go to the next step.

No

The cellular phone Bluetooth system is malfunctioning.

10

• Replace the microphone.

  (See MICROPHONE REMOVAL/INSTALLATION.)

• Does the same symptom appear?

Yes

Replace the Bluetooth unit.

(See Bluetooth UNIT REMOVAL/INSTALLATION.)

No

Troubleshooting is completed.

(The microphone is malfunctioning.)