Diagnostic Procedure

Step	Inspection		Action
1	INSPECT MICROPHONE CONNECTOR CONDITION Switch the ignition OFF (LOCK). 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 4.
1		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 4.
2		No	Go to the next step.
3	INSPECT MICROPHONE INPUT CIRCUIT FOR SHORT TO POWER SUPPLY Make sure reconnect the disconnected connectors. Reconnect the negative battery cable. Switch the ignition ON. Measure the voltage at the following terminals (wiring harness-side): Bluetooth unit terminal A Is there any voltage?	Yes	Repair or replace the wiring harness for a possible short to power supply, then go to the next step.
3		No	Go to the next step.
4	VERIFY TROUBLESHOOTING COMPLETED Clear the DTC from the Bluetooth unit memory. (See CLEARING DTC [BLUETOOTH SYSTEM (HANDS-FREE TELEPHONE (HF/TEL) SYSTEM)] .) Perform the Bluetooth unit DTC inspection. (See DTC INSPECTION [BLUETOOTH SYSTEM (HANDS-FREE TELEPHONE (HF/TEL) SYSTEM)] .) Is the same DTC present?	Yes	Replace the microphone, then go to the next step. (See MICROPHONE REMOVAL/INSTALLATION .)
4		No	Go to the step 6.
5	VERIFY TROUBLESHOOTING COMPLETED Clear the DTC from the Bluetooth unit memory. (See CLEARING DTC [BLUETOOTH SYSTEM (HANDS-FREE TELEPHONE (HF/TEL) SYSTEM)] .) Perform the Bluetooth unit DTC inspection. (See DTC INSPECTION [BLUETOOTH SYSTEM (HANDS-FREE TELEPHONE (HF/TEL) SYSTEM)] .) Is the same DTC present?	Yes	Replace the Bluetooth unit, then go to the next step. (See BLUETOOTH UNIT REMOVAL/INSTALLATION .)
5		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)] .)
6		No	DTC troubleshooting completed.