Description

Microphone circuit malfunction

Detection condition

• Short to power supply detected in microphone input circuit.

Fail-safe

Not applicable

Possible cause

• Microphone connector or terminal malfunction

• Bluetooth^® unit connector or terminal malfunction

• Short to power supply in wiring harness between Bluetooth^® unit terminal A and microphone terminal A

• Microphone malfunction

• Bluetooth^® unit malfunction

Step

Inspection

Action

1

• Switch the ignition off.

• Disconnect the negative battery cable.

  (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.)

• Disconnect the microphone connector.

• Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection.

• Is the connector normal?

Yes

Go to the next step.

No

Repair or replace the connector, then go to Step 5.

2

• Disconnect the Bluetooth^® unit connector.

• Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection.

• Is the connector normal?

Yes

Go to the next step.

No

Repair or replace the connector, then go to Step 5.

3

• Verify that the microphone and Bluetooth^® unit connectors are disconnected.

• Connect the negative battery cable.

  (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.)

• Switch the ignition ON (engine off or on).

• Measure the voltage at the microphone terminal A (wiring harness-side).

• Is the voltage 0 V?

Yes

Go to the next step.

No

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 power supply.

• Repair or replace the malfunctioning part.

If there is no common connector:

• Repair or replace the wiring harness which has a short to power supply.

Go to Step 5.

4

• Always reconnect all disconnected connectors.

• Connect the negative battery cable.

  (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.)

• Clear the DTC for the Bluetooth^® unit.

  (See CLEARING DTC [AUDIO UNIT].)

• Perform the Bluetooth^® unit DTC inspection.

  (See DTC INSPECTION [AUDIO UNIT].)

• Is the same DTC present?

Yes

Replace the microphone, then go to the next step.

(See MICROPHONE REMOVAL/INSTALLATION.)

No

Go to Step 6.

5

• Always reconnect all disconnected connectors.

• Connect the negative battery cable.

  (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.)

• Clear the DTC for the Bluetooth^® unit.

  (See CLEARING DTC [AUDIO UNIT].)

• Perform the DTC inspection for the Bluetooth^® unit.

  (See DTC INSPECTION [AUDIO UNIT].)

• Is the same DTC displayed?

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.

No

Go to the next step.

6

• Are any other DTCs displayed?

Yes

Repair or replace the malfunctioning part according to the applicable DTC troubleshooting.

(See DTC TABLE [AUDIO UNIT].)

No

DTC troubleshooting completed.