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 CIRCUIT FOR OPEN CIRCUIT Inspect for continuity between the following terminals (wiring harness-side): Bluetooth® unit terminal E and microphone terminal E Is there continuity?	Yes	Go to the next step.
3		No	Refer to the wiring diagram and verify whether or not there is a common connector between Bluetooth® unit terminal E and microphone terminal E. 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 an open circuit. Repair or replace the malfunctioning part. If there is no common connector: Repair or replace the wiring harness which has an open circuit. Go to Step 5.
4	INSPECT MICROPHONE INPUT CIRCUIT FOR SHORT TO GROUND Inspect for continuity between the following terminals (wiring harness-side) and body ground: Bluetooth® unit terminal A and body ground Is there continuity?	Yes	Refer to the wiring diagram and verify whether or not there is a common connector between Bluetooth® unit terminal A and microphone terminal A. 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 the next step.
4		No	Go to the next step.
5	VERIFY TROUBLESHOOTING COMPLETED Make sure reconnect the disconnected connectors. Connect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.5] .) 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	Replace the microphone then go to the next step. (See MICROPHONE REMOVAL/INSTALLATION .)
5		No	Go to Step 7.
6	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.
6		No	Go to the next step.
7	VERIFY THAT NO OTHER DTCs ARE RECORDED Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [AUDIO] .)
7		No	DTC troubleshooting completed.