SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSTOYOTA2004MATRIX XR, FWD, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 552 (BACK DOOR CONTROL SYSTEM - DIAGNOSTICS)CIRCUIT INSPECTIONPOWER SOURCE 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 2003 Toyota Sequoia. However, it is still accessible from the selected car via links, so may be relevant.
  1. Check PWR, ECU-B and ECU-IG fuse. 

    CHECK:

    Check continuity of PWR, ECU-B and ECU-IG fuse.

    OK:

    1. Continuity 
    1. NG : Replace the failure fuse. 
    2. OK : Go to Next Step 

  2. Check voltage between terminals POWER, SIG, BDR, BECU and GND of back door ECU connector. 

    PREPARATION:

    Turn ignition switch ON.

    CHECK:

    Measure voltage between terminals SIG, and GND.

    OK:

    1. Voltage: 10 - 14 V 

    PREPARATION:

    1. Turn ignition switch OFF.
    2. Disconnect the back door ECU connector.

    CHECK:

    Measure voltage between terminals BDR, BECU and GND.

    OK:

    1. Voltage: 10 - 14 V 
    1. OK : Proceed to next circuit inspection shown in  PROBLEM SYMPTOMS TABLE  . 
    2. NG : Go to Next Step 

  3. Check wire harness and connector between back door ECU and battery, back door ECU and body ground (See  HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE  ). 
    1. NG : Repair or replace wire harness or connector. 
    2. OK : Proceed to next circuit inspection shown in  PROBLEM SYMPTOMS TABLE  . 
RENDER: 1.0x

NO RELATED

Recommended Tools & Savings

Use the Manual With the Right Hardware

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

Affiliate disclosure: We may earn a commission at no extra cost to you.

Shop Manual-Ready ToolsFree Quote CheckQuote 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.