HANDS-FREE TELEPHONE SYSTEM DOES NOT RECEIVE/TRANSMIT CALLS, DOES NOT CONNECT [Bluetooth SYSTEM (HANDS-FREE TELEPHONE (HF/TEL) SYSTEM)]

id0903h5017500

Possible DTC

Hands-free telephone system does not receive/transmit calls, does not connect

Using the M-MDS

B116A:12, B116A:13, B116A:44

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

26:Er81, 26:Er82, 26:Er86
Possible cause
•  Problem in cellular phone
―  A cellular phone other than a hands-free telephone system-enabled models is used
―  Cellular phone is outside of the signal transmission area
―  Cellular phone does not operate (low battery voltage, power off)
―  Cellular phone does not set up to Bluetooth system
―  Bluetooth does not operate
•  Malfunction in microphone related parts
―  Poor connection in the connector
―  Open or short circuit in the wiring harness between the microphone and Bluetooth unit
―  Microphone malfunction
•  Malfunction in steering switch related parts
―  Poor connection in the connector
―  Open or short circuit in the wiring harness between the Hang-up/Pick-up/Talk switch and Bluetooth unit
―  Hang-up/Pick-up/Talk switch malfunction
•  Malfunction in audio system
―  Poor connection in the connector
―  CAN communication error between the audio unit and Bluetooth unit
―  Open or short circuit in the wiring harness between the Bluetooth unit and the speaker through the audio unit (without Bose®)
―  Open or short circuit in the wiring harness between the Bluetooth unit and the speaker through the audio amplifier (with Bose®)
•  Bluetooth unit does not respond
―  Poor connection in the connector
―  Open or short circuit in the wiring harness between the Bluetooth unit and the audio unit (without Bose®)
―  Open or short circuit in the wiring harness between the Bluetooth unit and the audio amplifier (with Bose®)
―  Open or short circuit in the wiring harness of the Bluetooth unit power supply or ground circuit
―  Bluetooth unit malfunction
•  Bluetooth unit electric field disturbance due to metallic device around Bluetooth unit


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 that the cellular phone is communicating with the Bluetooth unit.
•  Does the cellular phone connect to the Bluetooth unit via Bluetooth when the Hands-free telephone system is activated?
Yes
Enter a cellular phone signal transmission area and reinspect the Bluetooth system operation.
No
Go to the next step.
3
•  Inspect the cellular phone condition while the hands free phone does not operate.
•  Can the following conditions be verified?
―  Low battery voltage
―  Power is off
―  Out of signal transmission area
Yes
Enter a cellular phone signal transmission area and reinspect the Bluetooth system operation.
No
Go to the next step.
4
•  Does the cellular phone set up to the Bluetooth unit?
Yes
Go to the next step.
No
Set up the cellular phone to the Bluetooth unit.
5
•  Is the audio system sound output normal?
Yes
Go to the next step.
No
Perform the audio system troubleshooting procedure.
6
•  Perform the Bluetooth system (hands-free telephone (HF/TEL) system) DTC inspection.
•  Are the following DTC displayed?
―  B116A:12/26:Er81
―  B116A:13/26:Er82
―  B116A:44/26:Er86
Yes
Go to the next step.
No
Go to Step 8.
7*
•  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 (without car navigation system)/Bluetooth unit terminal A (with car navigation system)
―  Between microphone terminal B and audio unit terminal 2N (without car navigation system)/Bluetooth unit terminal B (with car navigation system)
―  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
Replace the microphone.
(See MICROPHONE REMOVAL/INSTALLATION.)
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.
8
•  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.
9
•  Inspect the Hang-up/Pick-up/Talk switch.
•  Is the Hang-up/Pick-up/Talk switch normal?
Yes
Go to the next step.
No
Replace the steering switch.
(See STEERING SWITCH REMOVAL/INSTALLATION.)
10*
•  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.
11
•  Call the hands-free cell phone using another cellular phone.
•  Do the same symptoms appear?
Yes
Go to the next step.
No
The cellular phone Bluetooth system is malfunctioning.
12
•  Is there any metallic device around the Bluetooth unit?
Yes
Remove the metallic device around the Bluetooth unit, then go to the next step.
No
Go to the next step.
13
•  Verify the malfunction symptom.
•  Is the malfunction improved?
Yes
Troubleshooting completed.
No
Go to the next step.
14
•  Replace the Bluetooth unit and verify the malfunction symptom.
•  Is the malfunction improved?
Yes
Troubleshooting completed.
No
Replace the audio unit.
(See AUDIO UNIT REMOVAL/INSTALLATION.)