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HOMESERVICE MANUALSTOYOTA2004MATRIX XR, FWD, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 446 (NAVIGATION SYSTEM - DIAGNOSTICS)CIRCUIT INSPECTIONAVC-LAN (COMMUNICATION BUS) CIRCUITINSPECTION PROCEDURE
2004 Toyota Matrix XR, FWD, Standard

Inspection Procedure

2004 Toyota Matrix XR, FWD, StandardSECTION Inspection Procedure
WARNING: This page is about a different car, the 2002 Toyota Prius. However, it is still accessible from the selected car via links, so may be relevant.
  1. Check Wire Harness And Connector Between Radio Receiver Assembly And Navigation ECU  . See HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE .
    1. OK: Go to next step.
    2. NG: Repair or replace wire harness or connector between radio receiver assembly and navigation ECU.
  2. Check Wire Harness And Connector Between Multi Display And Navigation ECU. See HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE .
    1. OK: Go to next step.
    2. NG: Repair or replace wire harness or connector between multi display and navigation ECU.
  3. Skip Radio Receiver Assembly And Check AVC-LAN  .

    Preparation:

    1. Connect Multi Display connector.
    2. Disconnect radio receiver assembly "R4" connector.
    3. Using SST (Navigation Check Wire P/N 09843-18050), connect the terminal TX+ to terminal TX- of "R4" connector of radio receiver assembly.
      Fig 1: Using Navigation Check Wire To Test Signal
      G01113070Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Check:

    Operate the panel switch and the touch switch of the display and check that the navigation functions.

    (Check that AVC-LAN is recovered.)

    1. OK: Replace the radio receiver assembly.
    2. NG: Go to next step.

  4. Replace The Navigation ECU  .
RENDER: 1.0x

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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.