DTC: B116A:13 [Bluetooth SYSTEM (HANDS-FREE TELEPHONE (HF/TEL) SYSTEM)]


id0902g8452100

Description

Open circuit in microphone circuit

Detection condition
Microphone non-connection signal constantly detected
Fail-safe function
Possible cause
•  Connector or terminal malfunction
•  Open circuit in wiring harness between Bluetooth unit terminal B and microphone terminal B
•  Short to ground in wiring harness between Bluetooth unit terminal A and microphone terminal A
•  Microphone malfunction
•  Bluetooth unit malfunction

Diagnostic Procedure

Step

Inspection

Action

1
INSPECT MICROPHONE CONNECTOR STATUS
•  Switch the ignition off (LOCK).
•  Disconnect the microphone connector.
•  Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection.
•  Is there any malfunctioning part?
Yes
Repair or replace the connector, then go to Step 5.
No
Go to the next step.
2
INSPECT BLUETOOTH UNIT CONDITION
•  Disconnect the Bluetooth unit connector.
•  Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection.
•  Is there any malfunctioning part?
Yes
Repair or replace the connector, then go to Step 5.
No
Go to the next step.
3
INSPECT MICROPHONE CIRCUIT FOR OPEN CIRCUIT
•  Inspect the wiring harness for continuity between Bluetooth unit terminal B and microphone terminal B (vehicle wiring harness side).
•  Is there continuity?
Yes
Go to the next step.
No
Repair or replace the wiring harness which has an open circuit, then go to Step 5.
4
INSPECT FOR SHORT TO GROUND IN MICROPHONE INPUT CIRCUIT
•  Inspect for continuity between Bluetooth unit terminal A (vehicle wiring harness side) and body ground.
•  Is there continuity?
Yes
Repair or replace the wiring harness which has a short to ground, then go to the next step.
No
Go to the next step.
5
PERFORM DTC INSPECTION AND VERIFY IF MALFUNCTIONING PART IS MICROPHONE OR BLUETOOTH UNIT
•  Reconnect all the disconnected connectors.
•  Perform an inspection of the Bluetooth unit DTCs.
•  Is the same DTC displayed?
Yes
Replace the microphone, then go to the next step.
No
Go to Step 7.
6
VERIFY THAT REPAIRS HAVE BEEN COMPLETED
•  Perform an inspection of the Bluetooth unit DTCs.
•  Is the same DTC displayed?
Yes
Replace the Bluetooth unit, then go to the next step.
No
Go to the next step.
7
VERIFY IF OTHER DTCs DISPLAYED
•  Are any other DTCs displayed?
Yes
Repair the malfunctioning part according to the applicable DTC troubleshooting.
No
DTC troubleshooting completed.