Vehicle Condition Setting Is Not Possible

WARNING: This page is about a different car, the 2003 Infiniti M45. However, it is still accessible from the selected car via links, so may be relevant.

CHECK HARNESS
1. Disconnect connectors of AV control unit, combination meter and BCM.
2. Check continuity AV control unit harness connector M77 terminal 34 (LG) and BCM harness connector M4 terminal 31 (LG).
  1. Continuity should exist.
3. Check continuity AV control unit harness connector M77 terminal 35 (PU) and BCM harness connector M4 terminal 30 (PU).
  1. Continuity should exist.
4. Check continuity between AV control unit harness connector M77 terminals 34 (LG), 35 (PU) and ground.
  
  Fig 1: Checking Harness (Vehicle Condition Setting Is Not Possible)
  Courtesy of NISSAN MOTOR CO., U.S.A.
  1. Continuity should not exist.
OK or NG

OK >> GO TO 2.

NG >>
- Check connector housings for disconnected or loose terminals.
- Repair harness or connector.
CHECK COMMUNICATION SIGNAL (AV-ME)
1. Connect connectors of AV control unit, combination meter and BCM.
2. Turn ignition switch ON.
3. Check voltage signal between AV control unit harness connector M77 terminal 34 (LG) and ground with CONSULT-II or oscilloscope.
  1. 34 (LG) - Ground : Refer to " TERMINALS AND REFERENCE VALUE FOR AV CONTROL UNIT ".
OK or NG

OK >> GO TO 3.

NG >> Replace AV control unit.
CHECK COMMUNICATION SIGNAL (ME-AV)
1. Turn ignition switch ON and display "VEHICLE ELECTRONIC SYSTEMS" screen.
2. Check voltage signal between AV control unit harness connector M77 terminal 35 (PU) and ground with CONSULT-II or oscilloscope.
  1. 35 (PU) - Ground : Refer to " TERMINALS AND REFERENCE VALUE FOR AV CONTROL UNIT ".
OK or NG

OK >> Replace AV control unit.

NG >> Replace BCM.