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Home >> Toyota >> 2004 >> Highlander Limited, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 918 (Audio, Visual, Navigation System (BOSE Audio) (With Navigation)) >> DTC/Circuit Diagnosis >> Power Supply And Ground Circuit >> Headrest Display Unit >> HEADREST DISPLAY UNIT: Diagnosis Procedure >> Passenger Seat

Passenger Seat

WARNING: This page is about a different car, the 2013 Nissan Armada. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK FUSE 

    Check that the fuse is not blown.

    Terminal Signal name Fuse No.
    2 Ignition switch ACC or ON 4

    Is the fuse OK? 

    YES: GO TO 2.

    NO: If fuse is blown, be sure to eliminate cause of malfunction before installing new fuse.

  2. CHECK POWER SUPPLY CIRCUIT 

    Check voltage between headrest display unit (passenger seat) connector B306 and ground.

    (+) (-) Value (Approx.)
    Connector Terminal
    B306 12 Ground Battery voltage

    Does specified voltage exist? 

    YES: GO TO 3.

    NO: Repair harness or connector.

  3. CHECK GROUND CIRCUIT 
    1. Turn ignition switch OFF.
    2. Disconnect headrest display unit (passenger seat) connector.
    3. Check continuity between headrest display unit (passenger seat) connector B306 and ground.
      Connector Terminal - Continuity
      B306 18 Ground Yes

      Does continuity exist? 

      YES: Inspection End.

      NO: Repair harness or connector.