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

id0903h5844300

1

Bluetooth system does not receive/transmit calls, does not connect

Possible DTC

With M-MDS

B1134:23, B116A:12, B116A:13, B116A:16, B116A:44, U0498:68

Without M-MDS
Audio unit
•  26:Er81, 82, 83, 84, 85, 86
Car-navigation unit
•  Device code 26/Error code 81, 82, 83, 84, 85, 86
POSSIBLECAUSE
•  Malfunction in HF/TEL switch related parts
―  Open or short circuit in the wiring harness between the HF/TEL switch and Bluetooth unit
―  CAN communication error between the car-navigation unit and Bluetooth unit (with car-navigation system)
―  HF/TEL switch malfunction
―  Poor connection in the connector
•  Malfunction in microphone related parts
―  Open or short circuit in the wiring harness between the microphone and Bluetooth unit
―  Microphone malfunction
―  Poor connection in the connector
•  Malfunction in audio system
―  Open or short circuit in the wiring harness between the Bluetooth unit and the speaker through the audio unit/car-navigation unit and audio amplifier. (with Bose®)
―  Open or short circuit in the wiring harness between the Bluetooth unit and the speaker through the audio unit/car-navigation unit (without Bose®)
―  Poor connection in the connector
•  Bluetooth unit does not respond
―  Bluetooth unit malfunction
―  Open or short circuit in the wiring harness between the Bluetooth unit and the audio unit/car-navigation
―  Open or short circuit in the wiring harness of the Bluetooth unit power supply or ground circuit
―  Poor connection in the connector
•  Problem in cellular phone
―  Cellular phone does not set up to Bluetooth system
―  Cellular phone does not operate (low battery voltage, power off)
―  Cellular phone is outside of the signal transmission area
―  Bluetooth does not operate
―  A cellular phone other than a Bluetooth 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
•  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.
2
•  Does the cellular phone set up to the Bluetooth unit?
Yes
Set up the cellular phone to the Bluetooth unit.
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
•  Perform the Bluetooth system on-board diagnostic.
•  Are the following DTC displayed?
―  B116A:12, 26:Er82, device code 26/error code 82
―  B116A:16, 26:Er83, device code 26/error code 83
―  B116A:13, 26:Er84, device code 26/error code 84
Yes
Go to the next step.
No
Go to Step 6.
5*
•  Inspect for open or short circuits in the following wiring harnesses and connectors, and inspect the connector connections.
―  Between microphone terminal A and Bluetooth unit terminal A
―  Between microphone terminal B and Bluetooth unit terminal B
―  Between microphone terminal C and Bluetooth unit terminal C
―  Between microphone terminal E (L.H.D.)/F (R.H.D.) and Bluetooth unit terminal E
•  Are the harnesses and connector connections normal?
Yes
Replace the microphone.
(See MICROPHONE REMOVAL/INSTALLATION.)
No
Repair or replace malfunctioning parts.
6
•  Perform the Bluetooth system on-board diagnostic.
•  Is U0498:68, 26:Er81, device code 26/error code 81 displayed?
Yes
Go to the next step.
No
Go to Step 10.
7
•  Perform the Bluetooth system on-board diagnostic.
•  Is B1134:23, 26:Er85, device code 26/error code 85 displayed?
Yes
Go to the next step.
No
Replace the steering switch.
(See STEERING SWITCH REMOVAL/INSTALLATION.)
8
•  Inspect the HF/TEL switch.
•  Is the HF/TEL switch normal?
(See STEERING SWITCH INSPECTION.)
Yes
Go to the next step.
No
Replace the steering switch.
(See STEERING SWITCH REMOVAL/INSTALLATION.)
9*
•  Inspect for open or short circuits in the following wiring harnesses and connectors, and inspect the connector connections.
―  Between steering switch terminal L and Bluetooth unit (28-pin) terminal F
•  Are the harnesses and connector connections normal?
Yes
Go to the next step.
No
Repair or replace malfunctioning parts.
10
•  Perform the Bluetooth system on-board diagnostic.
•  Is B116A:44, 26:Er86, device code 26/error code 86 displayed?
Yes
Replace the Bluetooth unit.
(See Bluetooth UNIT REMOVAL/INSTALLATION.)
No
Go to the next step.
11
•  Call the hands free cell phone using another cellular phone.
•  Do the same symptoms appear?
Yes
Replace the Bluetooth unit.
(See Bluetooth UNIT REMOVAL/INSTALLATION.)
No
The cellular phone Bluetooth system is malfunctioning.