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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 >> Headrest Display Unit >> Diagnosis Procedure

Diagnosis Procedure

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.

Regarding Wiring Diagram information, refer to "WIRING DIAGRAM ".

  1. CHECK VIDEO SIGNAL CIRCUITS CONTINUITY 
    1. Turn ignition switch OFF.
    2. Disconnect headrest display unit (passenger seat) and headrest display unit (driver seat) connectors.
    3. Check continuity between headrest display unit (passenger seat) connector B306 and headrest display unit (driver seat) connector B219.
      Headrest display unit (passenger seat) Headrest display unit (driver seat) Continuity
      Connector Terminal Connector Terminal
      B306 10 B219 11 Yes
      23 3
    4. Check continuity between headrest display unit (passenger seat) connector B306 and ground.
      Headrest display unit (passenger seat) Ground Continuity
      Connector Terminal
      B306 10 - No
      23

      Is inspection result normal? 

      YES: GO TO 2.

      NO: Repair or replace harness or connectors.

  2. CHECK MONITOR SIGNAL CIRCUITS CONTINUITY 
    1. Check continuity between headrest display unit (passenger seat) connector B306 and headrest display unit (driver seat) connector B219.
      Headrest display unit (passenger seat) Headrest display unit (driver seat) Continuity
      Connector Terminal Connector Terminal
      B306 19 B219 7 Yes
      20 8
    2. Check continuity between headrest display unit (passenger seat) connector B306 and ground.
      Headrest display unit (passenger seat) Ground Continuity
      Connector Terminal
      B306 19 - No
      20

      Is inspection result normal? 

      YES: GO TO 3.

      NO: Repair or replace harness or connectors.

  3. CHECK AUDIO SIGNAL CIRCUITS CONTINUITY 
    1. Check continuity between headrest display unit (passenger seat) connector B306 and headrest display unit (driver seat) connector B219.
      Headrest display unit (passenger seat) Headrest display unit (driver seat) Continuity
      Connector Terminal Connector Terminal
      B306 8 B219 13 Yes
      9 14
      21 5
      22 6
    2. Check continuity between headrest display unit (passenger seat) connector B306 and ground.
      Headrest display unit (passenger seat) Ground Continuity
      Connector Terminal
      B306 8 - No
      9
      21
      22

      Is inspection result normal? 

      YES: Inspection End.

      NO: Repair or replace harness or connectors.

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