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Home >> Toyota >> 2004 >> Highlander Limited, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 922 (Audio, Visual, Navigation System (Base Audio)) >> DTC/Circuit Diagnosis >> RGB (R: Red) Signal Circuit >> 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 CONTINUITY RGB (R: RED) SIGNAL CIRCUIT 
    1. Turn ignition switch OFF.
    2. Disconnect display unit connector M93 and AV control unit connector M44.
    3. Check continuity between display unit harness connector M93 (A) terminal 17 and AV control unit harness connector M44 (B) terminal 40.
      A B Continuity
      Connector Terminal Connector Terminal
      M93 17 M44 40 Yes
    4. Check continuity between display unit harness connector M93 (A) terminal 17 and ground.
      Fig 1: Checking Continuity Between Display Unit Harness Connector M93 Terminal 17 And Ground
      G08693554Courtesy of NISSAN NORTH AMERICA, INC.
      A - Continuity
      Connector Terminal
      M93 17 Ground No

      Are the continuity results as specified? 

      YES: GO TO 2.

      NO: Repair harness or connector.

  2. CHECK RGB (R: RED) SIGNAL 
    1. Connect display unit connector M93 and AV control unit connector M44.
    2. Turn ignition switch ON.
    3. Check signal between display unit harness connector M93 terminal 17 and ground.
      (+) (-) Condition Reference signal
      Connector Terminal
      M93 17 Ground Receive audio signal
      G08693555
      Fig 2: Checking Signal Between Display Unit Harness Connector M93 Terminal 17 And Ground
      G08693556Courtesy of NISSAN NORTH AMERICA, INC.

      Are the voltage readings as specified? 

      YES: Replace display unit. Refer to "REMOVAL AND INSTALLATION ".

      NO: Replace AV control unit. Refer to "REMOVAL AND INSTALLATION ".