Diagnosis Procedure

1. Turn ignition switch OFF.
2. Disconnect video distributor connector and headrest display unit connector.
3. Check continuity between video distributor harness connector and headrest display unit harness connector.

   Video distributor		Headrest display unit		Continuity
   Connector	Terminal	Connector	Terminal
   M217	32	B554* 1	24	Existed
   	28	B574* 2	24	Existed

   * 1: Headrest display unit LH

   * 2: Headrest display unit RH

4. Check continuity between headrest display unit harness connector and ground.

   Headrest display unit		Ground	Continuity
   Connector	Terminal
   B554* 1	24		Not existed
   B574* 2	24

   * 1: Headrest display unit LH

   * 2: Headrest display unit RH

Is the inspection result normal?

YES 

GO TO STEP 2  .

NO 

Repair harness or connector.

1. Connect video distributor connector and rear display unit connector.
2. Turn ignition switch ON.
3. Check signal between rear display unit harness connector using an oscilloscope.

   (+)		(-)	Condition	Reference value
   Headrest display unit
   Connector	Terminal
   B554* 1	24	Ground	When DVD, USB or front AUX image is displayed on headrest display unit LH or RH.	Courtesy of NISSAN NORTH AMERICA, INC.
   B574* 2	24

   * 1: Headrest display unit LH

   * 2: Headrest display unit RH

Is the inspection result normal?

YES 

Replace headrest display unit. Refer to EXPLODED VIEW WITH TORQUE SPECIFICATIONS .

NO 

Replace video distributor. Refer to REMOVAL AND INSTALLATION .