Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2003 Mitsubishi Lancer EvolutionFACTORY OEM SERVICE PROCEDURE
Control Units
CONTROL UNITS LOCATION
| Component | Component Location |
|---|---|
| ABS ECU (2.0L Turbo) | On right rear of engine compartment. |
| ABS ECU (2.0L) | On right rear of engine compartment. See Figure . |
| A/C ECU (Evolution) | Behind center of dash, below radio. See Figure . |
| A/C ECU (Except Evolution) | Behind center of dash, below radio. |
| Auto Cruise Control ECU (Except Evolution) | Behind right end of dash. See Figure . |
| Column ECU (Evolution) | On top of steering column. See Figure . |
| Column ECU (Except Evolution) | On top of steering column. |
| DRL ECU (Canada) | At left front corner of engine compartment. |
| Engine Control Module (Evolution) | Behind glove box. See Figure . |
| Engine Control Module (M/T) (Except Evolution) | Behind glove box. See Figure . |
| ETACS ECU (Evolution) | On rear of junction block, behind left end of dash. See Figure . |
| ETACS ECU (Except Evolution) | On rear of junction block, behind left end of dash. See Figure . |
| Fan Controller (2.0L) | On fan shroud, at left front of engine compartment. |
| Fan Control Module (2.0L Turbo) | On fan shroud, at left front of engine compartment. See Figure . |
| Front ECU (Evolution) | In engine compartment relay box. See Figure . |
| Front ECU (2.0L) | In engine compartment relay box. See Figure . |
| Headlight-ECU (Left/Right) | Integral to respective headlight assembly. |
| Immobilizer-ECU (Evolution) | Behind left side of dash, near data link connectors. See Figure . |
| Powertrain Control Module (A/T) (Except Evolution) | Behind glove box. See Figure . |
| SRS ECU (Evolution) | Behind lower center of dash. See Figure . |
| SRS ECU (Except Evolution) | Behind lower center of dash. See Figure . |
| Sun Roof-ECU | Integral to sun roof motor assembly. |
Factory Service Tools
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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.
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