Diagnostic Procedure

Step	Inspection		Action
1	INSPECT MICROPHONE CONNECTOR CONDITION Switch the ignition off. Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.5] .) 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.
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 5.
2		No	Go to the next step.
3	INSPECT MICROPHONE POWER SUPPLY CIRCUIT FOR SHORT TO GROUND Inspect for continuity between the following terminals (vehicle wiring harness) and body ground: Microphone terminal C Is there continuity?	Yes	Refer to the wiring diagram and verify whether or not there is a common connector between Bluetooth® unit terminal C and microphone terminal C. If there is a common connector: Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to ground. Repair or replace the malfunctioning part. If there is no common connector: Repair or replace the wiring harness which has a short to ground. Go to Step 5.
3		No	Go to the next step.
4	INSPECT Bluetooth® UNIT POWER SUPPLY CIRCUIT Make sure reconnect the disconnected connectors. Connect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.5] .) Switch the ignition ON (engine off or on). Measure the voltage at the following terminal (vehicle wiring harness): Bluetooth® unit terminal C Is there any voltage?	Yes	Replace the microphone, then go to the next step. (See MICROPHONE REMOVAL/INSTALLATION .)
4		No	Go to the next step.
5	VERIFY TROUBLESHOOTING COMPLETED Clear the DTC from the Bluetooth® unit memory. (See CLEARING DTC [AUDIO] .) Perform the Bluetooth® unit DTC inspection. (See DTC INSPECTION [AUDIO] .) Is the same DTC present?	Yes	Repeat the inspection from Step 1. If the malfunction recurs, replace the Bluetooth® unit. (See BLUETOOTH® UNIT REMOVAL/INSTALLATION .) Go to the next step.
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 [AUDIO] .)
6		No	DTC troubleshooting completed.