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HOMESERVICE MANUALSTOYOTA2004MATRIX XR, FWD, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 549 (BODY CONTROL SYSTEMS - 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 RAD No.2, WSH, ECU-IG and ECU-B fuse. 

    CHECK:

    Check continuity of RAD No.2, WSH, ECU-IG and ECU-B fuse.

    OK:

    1. Continuity 
    1. NG : Replace the failure fuse. 
    2. OK : Go To Next Step. 
  2. Check voltage between terminals ACC, WIG, IG, BECU and BDR and GND of Body ECU connector. 

    PREPARATION:

    Turn The ignition switch ON.

    CHECK:

    Measure voltage between terminals ACC, WIG, IG and body ground.

    OK:

    1. Voltage: 10 - 14 V 

    PREPARATION:

    Turn the ignition switch OFF.

    CHECK:

    Measure voltage between terminals BECU, BDR and body ground.

    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 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

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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.