💡 Mitsubishi ECM & TCM Repair
Mitsubishi engine and transmission control modules — separate units that work together, with the ECM controlling the engine and the TCM controlling the automatic transmission — are common repair candidates, particularly on the 1991-2011 engine computers used across Mitsubishi’s passenger car, SUV, and light truck lineup.
❓ What Do the ECM and TCM Do?
The ECM manages fuel injection, ignition timing, and emissions, while the TCM controls automatic transmission shift points and torque converter lockup. A fault in either can produce symptoms that look similar from the driver’s seat — stalling, poor performance, or the transmission defaulting to “limp mode.”
⚠️ Common Causes of Failure
- ✅ Jump-Starting / Voltage Spikes – a well-documented cause of ECM component damage on Mitsubishi platforms.
- ✅ Component Wear on Older Units – common failure-prone components on 1991-2011 ECMs degrade with age and heat cycling.
- ✅ Wiring/Connector Faults – corroded or damaged connections can mimic or cause internal module faults.
- ✅ Communication Faults – internal driver circuit failures can cause the ECM to stop communicating with diagnostic tools entirely.
⚠️ Symptoms of a Failed Module
- ✅ Intermittent stalling — a serious safety hazard if it happens in traffic
- ✅ Misfires or rough running
- ✅ Transmission stuck in “limp mode”
- ✅ Poor fuel economy
- ✅ No communication with a scan tool
- ✅ Check engine or transmission warning lights on the dash
If you’re seeing any of the above, mail your module in for diagnosis — don’t pay for a full dealer replacement first.
💻 Our Repair Process
- ✅ Diagnostic testing to confirm ECM/TCM failure vs. wiring/sensor fault
- ✅ Bench testing to isolate the exact failed component
- ✅ Component-level repair using components that meet or exceed OE specification
- ✅ Reprogramming and data restoration
- ✅ Final bench validation before return
✅ Why Choose ECU Repair Doctor
- ✅ Component-level repair, not just a fault-code reset
- ✅ Cloned to your VIN — no dealer programming visit required in most cases
- ✅ Same-day/next-day turnaround
- ✅ Mail-in service, anywhere in Canada
- ✅ Warrantied repair
🚗 Supported Models
- ✅ Mitsubishi Lancer / Lancer Evolution
- ✅ Mitsubishi Outlander / Outlander Sport
- ✅ Mitsubishi Eclipse
- ✅ Mitsubishi Galant
- ✅ Mitsubishi RVR
📞 Get a Quote
Call or text 647-784-9939, or see Contact for mail-in shipping instructions. Ship to 76 Sherry Road, Unit H, Scarborough, Ontario.
Sources referenced during research: moduleexperts.com Mitsubishi TCM repair notes, ecu-repairs.com Mitsubishi ECU testing and repair services, aesmodules.com Mitsubishi rebuilt module notes, go-parts.com Mitsubishi Outlander Sport/RVR ECM programming guide (2020-2025), dieselacs.com Mitsubishi Diamante ECM repair notes.