Audio System & Navigation System (DTCS) (2 Of 2)

1. Turn ignition switch ON.
2. Check the signal between active noise control unit terminals as per the following condition.

   Active noise control unit			Condition	Continuity
   Connector	(+)	(-)
   	Terminal
   B49	8	24	When inputting interior sound	Courtesy of NISSAN NORTH AMERICA, INC.

Is the inspection result normal?

YES

Replace active noise control unit. Refer to ACTIVE NOISE CONTROL UNIT : Removal & Installation .

NO

GO TO 2.

1. Turn ignition switch OFF.
2. Disconnect active noise control unit harness connector and front microphone harness connector.
3. Check the continuity between active noise control unit harness connector and front microphone harness connector.

   Active noise control unit		Front microphone		Continuity
   Connector	Terminal	Connector	Terminal
   B49	8	R19	2	Existed
   	24		1

Is the inspection result normal?

YES

GO TO 3.

NO

Repair or replace harness or connector.

1. Turn ignition switch ON.
2. Check the voltage between active noise control unit harness connector and ground.

   (+)		(-)	Voltage (Approx.)
   Active noise control unit
   Connector	Terminal
   B49	8	Ground	0 V
   	24

Is the inspection result normal?

YES

GO TO 4.

NO

Repair or replace harness or connector.

1. Turn ignition switch OFF.
2. Check the continuity between active noise control unit harness connector and ground.

   Active noise control unit		Ground	Continuity
   Connector	Terminal
   B49	8		Existed
   	24

Is the inspection result normal?

YES

Replace front microphone. Refer to FRONT MICROPHONE (ACTIVE NOISE CANCELLATION) : Removal & Installation .

NO

Repair or replace harness or connector.