No Fuel Information Is Displayed/No Warning Message Is Displayed

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 between AV control unit harness connector M77 terminal 34 (LG) and combination meter harness connector M42 terminal 56 (LG).
  1. Continuity should exist.
3. Check continuity between AV control unit harness connector M77 terminal 35 (PU) and combination meter harness connector M42 terminal 57 (PU).
  1. Continuity should exist.
  Fig 1: Checking Harness (No Fuel Information Is Displayed/No Warning Message Is Displayed)
  Courtesy of NISSAN MOTOR CO., U.S.A.
4. Check continuity between AV control unit harness connector M77 terminals 34 (LG), 35 (PU) and ground.
  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 combination meter, BCM and AV control unit.
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 ".
  Fig 2: Checking Communication Signal (AV-ME)
  Courtesy of NISSAN MOTOR CO., U.S.A.
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 ".
Fig 3: Checking Communication Signal (ME-AV)
Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG

OK >> Replace AV control unit.

NG >> Replace combination meter.