BLUETOOTH Voice Guidance Is Heard When Pressing Steering Wheel Audio Control Switch

WARNING: This page is about a different car, the 2009 Nissan Sentra. However, it is still accessible from the selected car via links, so may be relevant.

CHECK HARNESS BETWEEN BLUETOOTH CONTROL UNIT AND MICROPHONE

Turn ignition switch OFF.
Disconnect Bluetooth control unit connector and microphone connector.

Check continuity between Bluetooth control unit connector B15 (A) and microphone connector R4 (B).

TERMINALS CONTINUITY REFERENCE

Terminals				Continuity
Connector	Terminal	Connector	Terminal	Continuity
A: B15	7	B: R4	1	Yes
	8		2
	29		4

Check continuity between Bluetooth control unit harness connector B15 and ground.

TERMINALS CONTINUITY REFERENCE

Terminals			Continuity
Connector	Terminal	-	Continuity
A: B15	7	Ground	No
	8
	29

Fig 1: Checking Continuity Between Bluetooth Control Unit Connector B15 And Ground

Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG

OK: GO TO 2.

NG: Repair harness or connector.

CHECK MICROPHONE POWER SUPPLY
1. Connect Bluetooth control unit connector and microphone connector.
2. Turn ignition switch ON.
3. Check voltage between microphone connector R4 terminal 4 and ground.
  4 - Ground : Approx. 5V
Fig 2: Checking Voltage Between Microphone Connector R4 Terminal 4 And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG

OK: GO TO 3.

NG: Replace Bluetooth control unit. Refer to "REMOVAL AND INSTALLATION ".
CHECK MICROPHONE SIGNAL
Check signal between Bluetooth control unit harness connector B15 terminals 7 and 8.

When giving a voice

7 - 8:

Fig 3: Voltage Waveform Graph
Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 4: Checking Signal Between Bluetooth Control Unit Harness Connector B15 Terminals 7 And 8
Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG

OK: Replace Bluetooth control unit. Refer to "REMOVAL AND INSTALLATION ".

NG: Replace microphone. Refer to "REMOVAL AND INSTALLATION ".