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How to Reset the Service Engine Light on the Mitsubishi Eclipse Pre-19961Turn off the ignition important. Disconnect the battery cables from the battery located on the front passenger's side of your engine compartment. Loosen the ten mm battery cable finish bolt having a ten mm wrench and twist even though pulling the cable from the terminal. Repeat for the positive cable end car diagnostic tool.2Touch the cable ends together and turn the ignition crucial towards the "On" position.

This will drain the capacitors that retailer the power for the memory in the on-board computer. Leave the battery disconnected for 15 minutes to make sure the memory is reset.3Reconnect the battery cables starting with the positive cable finish and tighten the cable end bolts securely. Test-drive the automobile in both city and highway situations to permit the on-board personal computer to relearn the fuel trim and idle speed.Post-19964Connect a scan tool towards the diagnostic port positioned below the driver's side in the dash close to the steering column.

Turn the ignition crucial towards the "On" position.5Read the codes and descriptions by picking "OBD-II Diagnostics" from the menu on the scan tool display then pick "Read Codes" from the diagnostic menu. It might be helpful to write down the existing codes and descriptions for future diagnostics when the repair proves unsuccessful.6Erase the codes by choosing "Erase" or "Clear Codes" from the menu. Pick "Yes" Professional diagnositic tools; when the warning message is displayed asking if you are confident you wish to erase the codes. Test-drive the vehicle in both city and highway driving situations to permit the computer to relearn fuel trims and run its automatic emissions handle checks.