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HOMESERVICE MANUALSTOYOTA2004MATRIX XR, FWD, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 143 (ENGINE CONTROLS - REMOVAL & INSTALLATION 4-CYLINDER)COMPUTERIZED ENGINE CONTROLSENGINE CONTROL MODULEREMOVAL & INSTALLATION (MR2)
2004 Toyota Matrix XR, FWD, Standard

Removal & Installation (MR2)

2004 Toyota Matrix XR, FWD, StandardSECTION Removal & Installation (MR2)
WARNING: This page does not describe the selected car, but rather 11 other vehicles, including the 2003 Toyota Tacoma, 2003 Toyota RAV4, 2003 Toyota Prius, 2003 Toyota Matrix, and 2003 Toyota MR2. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ensure ignition is off.
  2. Note location of Engine Control Module (ECM). See ECM LOCATION  table.
  3. Remove luggage compartment lids, luggage compartments, quarter trim panels, lower trim covers, partition board and cover for access to ECM. See Fig 1. For additional information on removal of luggage compartment components, see FUEL PUMP  under FUEL SYSTEMS.
  4. Remove ECM. To install, reverse removal procedure.
Fig 1: Locating Engine Control Module & Components (MR2)
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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.