DTC: B116A:16, 26:Er83 [Bluetooth SYSTEM (HANDS-FREE TELEPHONE (HF/TEL) SYSTEM)]

id0902g8440300

DESCRIPTION

Microphone circuit malfunction
DETECTION CONDITION
Short to ground in microphone power supply circuit
POSSIBLE CAUSE
•  Connector or terminal malfunction
•  Short to ground in wiring harness between the following terminals:
―  Bluetooth unit terminal C and microphone terminal C
•  Microphone malfunction
•  Bluetooth unit malfunction

Diagnostic Procedure

Step

Inspection

Action
1
INSPECT MICROPHONE CONNECTOR CONDITION
•  Switch the ignition to off.
•  Disconnect the negative battery cable.
•  Disconnect the microphone connector.
•  Inspect the connector for poor connection (such as damaged/pulled-out pins, and corrosion).
•  Is there any malfunction?
Yes
Repair or replace the connector or terminal, then go to Step 5.
No
Go to the next step.
2
INSPECT Bluetooth UNIT CONNECTOR CONDITION
•  Disconnect the Bluetooth unit connector.
•  Inspect the connector for poor connection (such as damaged/pulled-out pins, and corrosion).
•  Is there any malfunction?
Yes
Repair or replace the connector or terminal, then go to Step 5.
No
Go to the next step.
3
INSPECT MICROPHONE POWER SUPPLY CIRCUIT FOR SHORT TO GROUND
•  Inspect for continuity between the following terminals (wiring harness-side) and body ground:
―  Microphone terminal C
•  Is there continuity?
Yes
Repair or replace the wiring harness for a possible short to ground, then go to Step 5.
No
Go to the next step.
4
INSPECT Bluetooth UNIT POWER SUPPLY CIRCUIT
•  Make sure reconnect the disconnected connectors.
•  Reconnect the negative battery cable.
•  Switch the ignition to ON.
•  Measure the voltage at the following terminal (wiring harness-side):
―  Bluetooth unit terminal C
•  Is there any voltage?
Yes
Replace the microphone, then go to the next step.
(See MICROPHONE REMOVAL/INSTALLATION.)
No
Go to the next step.
5
VERIFY TROUBLESHOOTING COMPLETED
•  Reconnect the negative battery cable.
•  Clear the DTC from the Bluetooth unit memory.
•  Perform the Bluetooth unit DTC inspection.
•  Is the same DTC present?
Yes
Repeat the inspection from Step 1.
•  If the malfunction recurs, replace the audio unit.
Go to the next step.
No
Go to the next step.
6
VERIFY THAT NO OTHER DTCs ARE RECORDED
•  Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [Bluetooth SYSTEM (HANDS-FREE TELEPHONE (HF/TEL) SYSTEM)].)
No
DTC troubleshooting completed.