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Screen Is Not Shown

WARNING: This page is about a different car, the 2005 Infiniti G35. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK DISPLAY UNIT 

    Check if brightness of screen changes when DAY/NIGHT switch on NAVI switch is turned on after turning on ignition switch.

    Does brightness of screen change? 

    1. YES: GO TO  3.
    2. NO: GO TO 2.
  2. CHECK DISPLAY UNIT POWER SUPPLY AND GROUND CIRCUIT 

    Check display unit power supply and ground circuit. Refer to "Power Supply and Ground Circuit Check for Display Unit and NAVI Switch ".

    OK or NG 

    1. OK: Replace display unit.
    2. NG: Repair malfunctioning parts.
  3. CHECK NAVI CONTROL UNIT POWER SUPPLY AND GROUND CIRCUIT 

    Check NAVI control unit power supply and ground circuit. Refer to "Power Supply and Ground Circuit Check for NAVI Control Unit ".

    OK or NG 

    1. OK: GO TO 4.
    2. NG: Repair malfunctioning parts.
  4. CHECK HARNESS 
    1. Turn ignition switch OFF.
    2. Disconnect NAVI control unit connector and display unit connector.
    3. Check continuity between NAVI control unit harness connector M57 terminal 12 (L) and display unit harness connector M35 terminal 8 (L).
      1. 12 (L) - 8 (L): Continuity should exist. 
    4. Check continuity between NAVI control unit harness connector M57 terminal 12 (L) and ground.
      1. 12 (L) - Ground: Continuity should not exist. 
      Fig 1: Checking Continuity Between NAVI Control Unit Harness Connector M57 Terminal 12 (L) And Display Unit Harness Connector M35 Terminal 8 (L)
      G02337821Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    1. OK: GO TO  2.
    2. NG: Repair harness or connector.
  5. HARNESS CHECK 
    1. Connect NAVI control unit connector and display unit connector.
    2. Turn ignition switch ON.
    3. Check signal between NAVI control unit harness connector M57 terminal 12 (L) and 17 with CONSULT-II or oscilloscope.
      1. 12 (L) -17: Refer to " Terminals and Reference Value for NAVI Control Unit  "  .

    OK or NG 

    1. OK: GO TO  7.
    2. NG: Replace NAVI control unit.
    Fig 2: Checking Signal Between NAVI Control Unit Harness Connector M57 Terminal 12 (L) And 17
    G02337822Courtesy of NISSAN MOTOR CO., U.S.A.
  6. CHECK HARNESS 
    1. Turn ignition switch OFF.
    2. Disconnect NAVI control unit connector and cover switch connector.
    3. Check continuity between NAVI control unit harness connector M57 terminal 22 (R/W) and ground.
      1. 22 (R/W) - Ground: Continuity should not exist. 

    OK or NG 

    1. OK: GO TO  2.
    2. NG: Repair harness or connector.
    Fig 3: Checking Continuity Between NAVI Control Unit Harness Connector M57 Terminal 22 (R/W) And Ground
    G02337823Courtesy of NISSAN MOTOR CO., U.S.A.
  7. CHECK NAVI CONTROL UNIT INPUT SIGNAL 
    1. Connect NAVI control unit connector.
    2. Turn ignition switch ON.
    3. Check voltage between up-and-down unit (display unit) harness connector M95 terminal 5 (R/W) and ground.
      1. 5 (R/W) - Ground: Approx. 5V 

    OK or NG 

    1. OK: Replace display unit.
    2. NG: Replace NAVI control unit.
    Fig 4: Checking Voltage Between Up-And-Down Unit (Display Unit) Harness Connector M95 Terminal 5 (R/W) And Ground
    G02337824Courtesy of NISSAN MOTOR CO., U.S.A.
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