Beep at Start-Up, No Display Appears on Screen.

WARNING: This page is about a different car, the 2003 Infiniti G35. However, it is still accessible from the selected car via links, so may be relevant.

COMMUNICATION LINE CHECK 1
1. Disconnect NAVI control unit connector, display unit connector and NAVI switch connector.
2. Check the following.
  - Continuity between NAVI control unit and display unit.
    
    Fig 1: Checking Continuity Between NAVI Control Unit And Display Unit (1 Of 2)
    Courtesy of NISSAN MOTOR CO., U.S.A.
  - Continuity between NAVI control unit harness connector M58 terminal 33 (G), and NAVI switch harness connector M37 terminal 5 (G).
    1. Continuity should exist.
    Fig 2: Checking Continuity Between NAVI Control Unit And Display Unit (2 Of 2)
    Courtesy of NISSAN MOTOR CO., U.S.A.
  - Continuity between NAVI control unit and ground.
    
    Fig 3: Checking Continuity Between NAVI Control Unit Terminal 33 (G), And NAVI Switch Terminal 5 (G)
    Courtesy of NISSAN MOTOR CO., U.S.A.
    
    Fig 4: Checking Continuity Between NAVI Control Unit And Ground (1 Of 2)
    Courtesy of NISSAN MOTOR CO., U.S.A.
    
    Fig 5: Checking Continuity Between NAVI Control Unit And Ground (2 Of 2)
    Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG

OK : GO TO 2.

NG : Repair harness or connector.
COMMUNICATION LINE CHECK 2
Check the following:
- Continuity between display unit harness connector M35 terminal 13(R) and NAVI switch harness connector M37 terminal 4(R).
  1. Continuity should exist.
- Continuity between display unit harness connector M35 terminal 13(R) and ground.
  1. Continuity should not exist.
  Fig 6: Checking Continuity Between Display Unit Terminal 13(R) And NAVI Switch Terminal 4(R)
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG

OK : GO TO 3.

NG : Repair harness or connector.
COMMUNICATION SIGNAL (DISP-NAVI) CHECK
1. Connect NAVI control unit connector.
2. Turn ignition switch ON.
3. Check voltage between NAVI control unit harness connector M58 terminal 33 (G) and ground.
  1. Approx. 2.8V
  Fig 7: Checking Voltage Between NAVI Control Unit Terminal 33 (G) And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG

OK : GO TO 4.

NG : Replace NAVI control unit.
COMMUNICATION SIGNAL (NAVI-DISP) CHECK
1. Disconnect NAVI control unit and connect display unit connector.
2. Turn ignition switch ON.
3. Check voltage between NAVI control unit harness connector M58 terminal 35 (B) and ground.
  1. Approx. 3.5V
  Fig 8: Checking Voltage Between NAVI Control Unit Terminal 35 (B) And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG

OK : GO TO 5.

NG : Replace display unit.
COMMUNICATION SIGNAL (DISP-SW) CHECK
Check voltage between display unit harness connector M35 terminal 13 (R) and ground.
1. Approx. 5V
OK or NG

OK : GO TO 6.

NG : Replace display unit.
COMMUNICATION SIGNAL (DISP-NAVI) CHECK
1. Connect NAVI control unit connector and NAVI switch connector.
2. Push the "INFO" switch.
3. Turn ignition switch ON.
4. Check the signal between NAVI control unit harness connector M58 terminal 33 (G) and 31 with CONSULT-II or oscilloscope.
  1. 33 (G)- 31 : Refer to " TERMINALS AND REFERENCE VALUE FOR NAVI CONTROL UNIT ".
  Fig 10: Checking Signal Between NAVI Control Unit Terminal 33 (G) And 31
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG

OK : GO TO 7.

NG : Replace NAVI control unit.
COMMUNICATION SIGNAL (NAVI-DISP) CHECK
1. Push "INFO" switch.
2. Check the signal between NAVI control unit harness connector M58 terminal 35 (B) and 31 with CONSULT-II or oscilloscope.
  1. 35 (B)-31 : Refer to " TERMINALS AND REFERENCE VALUE FOR NAVI CONTROL UNIT ".
OK or NG

OK : GO TO 8.

NG : Replace display unit.
COMMUNICATION SIGNAL (DISP-SW) CHECK
1. Check the signal between NAVI switch harness connector M37 terminal 4 (R) and ground with CONSULT-II or oscilloscope.
  1. 4 (R) - Ground : Refer to " TERMINALS AND REFERENCE VALUE FOR NAVI SWITCH ".
OK or NG

OK : Replace display unit.

NG : Replace NAVI control unit.