Navigation System Is Not Operated by NAVI Switch

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.

CHECK POWER SUPPLY AND GROUND CIRCUIT (DISPLAY UNIT AND NAVI SWITCH)
Check power supply and ground circuit. Refer to "Power Supply and Ground Circuit Check for Display Unit and NAVI Switch ".

OK or NG
1. OK: GO TO 2.
2. NG: Power supply and ground circuit check.
CHECK HARNESS (BETWEEN NAVI SWITCH AND DISPLAY UNIT)
1. Turn ignition OFF.
2. Disconnect display unit connector and NAVI switch connector.
3. Check continuity between display unit harness connector M35 terminal 16 (G), 20 (R) and NAVI switch harness connector M37 terminal 5 (G), 4 (R).
  1. Continuity should exist.
4. Check continuity between display unit harness connector M35 terminal 16 (G), 20 (R) and ground.
  1. Continuity should not exist.
  Fig 1: Checking Continuity Between Display Unit Harness Connector M35 Terminal 16 (G), 20 (R) And NAVI Switch Harness Connector M37 Terminal 5 (G), 4 (R)
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: GO TO 3.
2. NG: Repair harness or connector.
CHECK HARNESS (BETWEEN DISPLAY UNIT AND NAVI CONTROL UNIT)
1. Disconnect NAVI control unit connector and display unit connector.
2. Check continuity between NAVI control unit harness connector M58 terminal 44 (SB), 45 (B) and display unit harness connector M35 terminal 14 (SB), 13 (B).
  1. Continuity should exist.
3. Check continuity between NAVI control unit harness connector M58 terminal 44 (SB), 45 (B) and ground.
  1. Continuity should not exist.
  Fig 2: Checking Continuity Between NAVI Control Unit Harness Connector M58 Terminal 44 (W), 45 (B) And Display Unit Harness Connector M35 Terminal 14 (W), 13 (B)
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: GO TO 4.
2. NG: Repair harness or connector.
CHECK NAVI SWITCH
Replace normal NAVI switch and recheck the symptom.

Is the function normal?
1. YES: Replace NAVI switch.
2. NO: GO TO 5.
CHECK DISPLAY UNIT
Replace normal display unit and recheck the symptom.

Is the function normal?
1. YES: Replace display unit.
2. NO: Replace NAVI control unit.