Screen Is Not Shown

WARNING: This page is about a different car, the 2006 Infiniti G35. However, it is still accessible from the selected car via links, so may be relevant.

CHECK DISPLAY UNIT
Check if brightness of screen changes when switches on NAVI switch are turned on after turning on ignition switch.

Does brightness of screen change?

YES: GO TO 3.

NO: GO TO 2.
CHECK DISPLAY UNIT POWER SUPPLY AND GROUND CIRCUIT
Check display unit power supply and ground circuit. Refer to "POWER SUPPLY AND GROUND CIRCUIT INSPECTION FOR DISPLAY UNIT AND NAVI SWITCH ".

OK or NG

OK: Replace display unit.

NG: Repair malfunctioning parts.
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 INSPECTION FOR DISPLAY UNIT AND NAVI SWITCH ".

OK or NG

OK: GO TO 4.

NG: Repair malfunctioning parts.
CHECK RGB (YS) SIGNAL
1. Turn ignition switch OFF.
2. Disconnect NAVI control unit connector and display unit connector.
3. Check continuity between NAVI control unit harness connector (A) M58 terminal 50 and display unit harness connector (B) M35 terminal 8.
  50 - 8: Continuity should exist .
4. Check continuity between NAVI control unit harness connector (A) M58 terminal 50 and ground.
  50 - Ground: Continuity should not exist .
  
  Fig 1: Identifying Continuity Between Navi Control Unit Harness Connector M58 Terminal 50 And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG

OK: GO TO 5.

NG: Repair harness or connector.
CHECK RGB AREA SIGNAL
1. Connect NAVI control unit connector and display unit connector.
2. Turn ignition switch ON.
3. Check signal between NAVI control unit harness connector M58 terminals 50 and 49 with CONSULT-II or oscilloscope.
  50 - Ground: Approx. 5 V
  
  Fig 2: Identifying Signal Between Navi Control Unit Harness Connector M58 Terminals 50 And 49
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG

OK: GO TO 6.

NG: Replace NAVI control unit.
CHECK LIMIT SWITCH SIGNAL
1. Turn ignition switch OFF.
2. Disconnect NAVI control unit connector and up and down unit (Display unit).
3. Check continuity between NAVI control unit harness connector M57 terminal 22 and ground.
  22 - Ground: Continuity should not exist .
  
  Fig 3: Identifying Continuity Between Navi Control Unit Harness Connector M57 Terminal 22 And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG

OK: GO TO 7.

NG: Repair harness or connector.
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 and ground.
  5 - Ground: Approx. 5 V
OK or NG

OK: Replace display unit.

NG: Replace NAVI control unit.

Fig 4: Identifying Voltage Between Up-And-Down Unit Harness Connector M95 Terminal 5 And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.