No.1 HANDS-FREE TELEPHONE SYSTEM DOES NOT RECEIVE/TRANSMIT CALLS, DOES NOT CONNECT [Bluetooth SYSTEM (HANDS-FREE TELEPHONE (HF/TEL) SYSTEM)]

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1 | Hands-free telephone system does not receive/transmit calls, does not connect
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Possible DTC | Using the M-MDS | B116A:12, B116A:13, B116A:44
Without using M-MDS (On-board diagnostic test mode) | 26:Er82, 26:Er84, 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
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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 1A (with car navigation system) ― Between microphone terminal B and audio unit terminal 2N (without car navigation system)/Bluetooth unit terminal 1B (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 | If there is a common connector:If there is no common connector: Refer to the wiring diagram and verify whether or not there is a common connector between microphone and audio unit/buletooth unit. • 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. • 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. (See STEERING SWITCH INSPECTION.) • 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 F and audio unit terminal 1H ― Between clock spring terminal H and audio unit terminal 1P • Are the harnesses and connector connections normal? | Yes | Go to the next step.
No | If there is a common connector:If there is no common connector: Refer to the wiring diagram and verify whether or not there is a common connector between clock spring and audio unit. • 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. • 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. (See Bluetooth UNIT REMOVAL/INSTALLATION.) • Is the malfunction improved? | Yes | Troubleshooting completed.
No | Replace the audio unit. (See AUDIO UNIT REMOVAL/INSTALLATION.)