by radsdau » Thu Mar 22, 2012 3:58 pm
The extra Mitsubishi cable (with the 2.5mm stereo plug on one end) must be connected to the OP2 cable and to the vehicle's reflash enable connector for reading and reflashing. In Mitsubishis applying the right signals to this extra connector puts the ECU in a special programming mode.
If you don't know where it goes, have a good look under the dash near the OBDII connector. It should be fairly easy to spot.