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.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSMITSUBISHI2005LANCER L4-2.4L SOHCREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTRELAYS AND MODULES - POWERTRAIN MANAGEMENTRELAYS AND MODULES - COMPUTERS AND CONTROL SYSTEMSENGINE CONTROL MODULETECHNICAL SERVICE BULLETINSPOWERTRAIN, ANTITHEFT - ECU & PCM REPLACEMENT
2005 Mitsubishi Lancer L4-2.4L SOHC
Powertrain, Antitheft - ECU & PCM Replacement
2005 Mitsubishi Lancer L4-2.4L SOHCSECTION Powertrain, Antitheft - ECU & PCM Replacement
NO: TT-133-13-002
DATE: December, 2006
MODEL: See Below
SUBJECT
IMMOBILIZER ECU & PCM REPLACEMENT
Immobilizer ECU & PCM Replacement - All 2000 & 2001 and Later Models with Immobilizer.
The criteria for Immobilizer ECU and/or PCM replacement changed from model year 2000 to 2001:
^ 2000 Models - When replacing the PCM, the Immobilizer ECU must always be replaced and the keys re-registered.
^ 2001 and Later Models - On all models except early production 2001 Eclipse Spyder (see note below), it is not necessary to replace the Immobilizer ECU when replacing the PCM, although all keys must be re-registered.
NOTE: For 2001 Eclipse Spyder Only:
^ If the vehicle's production date is early July 2000 or earlier, the 5th, 6th, & 7th digits of the VIN are E35 or E55, and the fuel cap is the screw on type, treat this vehicle like it is a 2000 model which would require Immobilizer ECU replacement when the PCM is replaced.
^ If the vehicle was produced after early July, the 5th, 6th, & 7th digits of the VIN are E45 or E85, and the fuel cap is the quarter-turn type, the Immobilizer ECU does not require replacement when installing a new PCM.
For all 2000-on models with immobilizer:
The Immobilizer ECU can always be replaced without having to replace the PCM, although all keys must be re-registered.
DATE: December, 2006
MODEL: See Below
SUBJECT
IMMOBILIZER ECU & PCM REPLACEMENT
Immobilizer ECU & PCM Replacement - All 2000 & 2001 and Later Models with Immobilizer.
The criteria for Immobilizer ECU and/or PCM replacement changed from model year 2000 to 2001:
^ 2000 Models - When replacing the PCM, the Immobilizer ECU must always be replaced and the keys re-registered.
^ 2001 and Later Models - On all models except early production 2001 Eclipse Spyder (see note below), it is not necessary to replace the Immobilizer ECU when replacing the PCM, although all keys must be re-registered.
NOTE: For 2001 Eclipse Spyder Only:
^ If the vehicle's production date is early July 2000 or earlier, the 5th, 6th, & 7th digits of the VIN are E35 or E55, and the fuel cap is the screw on type, treat this vehicle like it is a 2000 model which would require Immobilizer ECU replacement when the PCM is replaced.
^ If the vehicle was produced after early July, the 5th, 6th, & 7th digits of the VIN are E45 or E85, and the fuel cap is the quarter-turn type, the Immobilizer ECU does not require replacement when installing a new PCM.
For all 2000-on models with immobilizer:
The Immobilizer ECU can always be replaced without having to replace the PCM, although all keys must be re-registered.
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.