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HOMESERVICE MANUALSTOYOTA2004MATRIX XR, FWD, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 848 (DRIVER SIDE JUNCTION BLOCK (BODY NO. 2 CONTROL SYSTEM) - DIAGNOSIS)CIRCUIT INSPECTIONHEADLIGHT RELAY 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 Lexus LS 430. However, it is still accessible from the selected car via links, so may be relevant.

HINT:

In case of using the LEXUS hand-held tester, start the inspection from step 1 and in case of not using the LEXUS hand-held tester, start from step  2.

  1. Check the headlight relay using LEXUS hand-held tester. 

    PREPARATION: 

    Connect the LEXUS hand-held tester to the DLC3.

    CHECK: 

    Check that the headlight relay can operate in an ACTIVE TEST.

    HINT:

    If the headlight relay is normal, the headlight Lo-beam comes "ON".

    In the case that the headlight relay is activated but the headlight Lo-beam does not come on, check the headlight circuit.

    1. OK : Proceed to next circuit inspection shown on problem symptom table (See  PROBLEM SYMPTOMS TABLE  ). 
    2. NG : Go to next step. 
  2. Check the headlight relay (See  INSPECTION  ). 
    1. NG : Replace the headlight relay. 
    2. OK : Go to next step. 
  3. Check wire harness and connector between headlight relay and driver side J/B ECU (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 on problem symptom table (See  PROBLEM SYMPTOMS TABLE  ). 
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.