Operating Screen for Audio and A/C is Not Displayed When Showing NAVI Screen

WARNING: This page is about a different car, the 2005 Nissan Quest. However, it is still accessible from the selected car via links, so may be relevant.

CHECK HARNESS
1. Turn ignition switch OFF.
2. Disconnect display control unit connector M95 and display unit connector M93.
3. Check continuity between display control unit harness connector M95 terminal 49, 51 (B), 53 (W), 55 (R) and display unit harness connector M93 terminal 21, 9 (B), 20 (W), 8 (R).
  Continuity should exist.
4. Check continuity between display control unit harness connector M95 terminal 55 (R) and display unit harness connector M93 terminal 8 (R).
  Continuity should exist.
5. Check continuity between display control unit harness connector M95 terminal 49, 51 (B), 53 (W), 55 (R) and ground.
  
  Fig 1: Checking Continuity Between Display Control Unit Harness Connector M95 Terminal 49, 51, 53, 55 & ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Continuity should not exist.
OK or NG
1. OK: GO TO 2.
2. NG: Repair harness.
CHECK HORIZONTAL SYNCHRONIZATION SIGNAL
1. Connect display control unit connector and display unit connector.
2. Turn ignition switch ON.
3. Check signal between display control unit connector M95 terminals 55 (R) and 49 with CONSULT-II or oscilloscope.
  
  Fig 2: Checking Horizontal Synchronization Signal Between Display Control Unit Connector M95 Terminals 55 (R) & 49
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  55 (R) and 49: Refer to " TERMINALS AND REFERENCE VALUE FOR DISPLAY CONTROL UNIT ".
OK or NG
1. OK: GO TO 3.
2. NG: Replace display unit. Refer to "REMOVAL AND INSTALLATION OF DISPLAY UNIT ".
CHECK RGB AREA SIGNAL
1. Press the "TRIP" button.
2. Check signal between display control unit connector M95 terminals 51 (B) and 49 with CONSULT-II or oscilloscope.
  
  Fig 3: Checking RGB Area Signal Between Display Control Unit Connector M95 Terminals 51 (B) & 49
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  51 (B) - 49: Refer to " TERMINALS AND REFERENCE VALUE FOR DISPLAY CONTROL UNIT ".
OK or NG
1. OK: Replace display unit. Refer to "REMOVAL AND INSTALLATION OF DISPLAY UNIT "
2. NG: Replace display control unit. Refer to "REMOVAL AND INSTALLATION OF DISPLAY CONTROL UNIT ".