2004 Nissan-Datsun Sentra SE-RFACTORY OEM SERVICE PROCEDURE

AV Communication Line Check (Between Display Control Unit and NAVI Control

WARNING: This page is about a different car, the 2003 Nissan Murano. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK POWER SUPPLY AND GROUND CIRCUIT 
    1. Check system of power supply and ground circuit NAVI control unit. Refer to "POWER SUPPLY AND GROUND CIRCUIT CHECK FOR NAVI CONTROL UNIT  ".

    OK or NG

    1. OK : GO TO 2.
    2. NG : Check the malfunctioning parts.
  2. CHECK HARNESS 
    1. Turn ignition switch OFF.
    2. Disconnect NAVI control unit connector and display control unit connector.
    3. Check continuity between NAVI control unit and display control unit.
      NAVI CONTROL UNIT AND DISPLAY CONTROL UNIT CIRCUIT HARNESS CHECK CHART

      Terminals Continuity
      NAVI control unit (+) Display control unit (-)
      Connector Terminal (Wire color) Connector Terminal (Wire color)
      M63 44 (O) M43 32 (O) Yes
      45 (B/P) 34 (B/P)
    4. Check continuity between NAVI control unit and ground.
    NAVI CONTROL UNIT CONNECTOR TERMINALS CONTINUITY CHECK CHART

    Terminals Continuity
    NAVI control unit (+) (-)
    Connector Terminal (Wire color)
    M63 44 (O) Ground No
    45 (B/P)

    OK or NG

    1. OK : GO TO 3.
    2. NG : Repair harness or connector.
    Fig 1: Checking Continuity Between NAVI Control Unit Connector And Display Control Unit Connector Terminals
    G03360105Courtesy of NISSAN MOTOR CO., U.S.A.
  3. CHECK AV COMMUNICATION SIGNAL 
    1. Connect NAVI control unit connector and display control unit connector.
    2. Turn ignition switch ON.
    3. Check signal between NAVI control unit harness connector M63 terminal 44 (O) and 45 (B/P) with CONSULT-II or oscilloscope.
      1. 44 (O), 45 (B/P)-Ground : Refer to " TERMINALS AND REFERENCE VALUE FOR NAVI CONTROL UNIT   "  .

    OK or NG

    1. OK : Replace display control unit.
    2. NG : Replace NAVI control unit.
    Fig 2: Checking Voltage Between NAVI Control Unit Connector Terminals M63 Terminal 44,45 And Ground
    G03360106Courtesy of NISSAN MOTOR CO., U.S.A.
Factory Service Tools

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.

Shop Manual-Ready ToolsCompare Repair QuoteQuote Shield Pro

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

Rather have a pro handle this?

A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.

Comes to youSame-day available12-month warranty
Get a Free Quote

No obligation. See pricing before you book.