Mitsubishi Repair Problems? Ask a Mechanic for Answers ASAP
The cruise control is fully integrated into the PCM on this model (no standalone unit) so your operation is going to be primarily dependent on the PCM being cruise-enabled. They are not all cruise enabled in my experience.To verify the condition you will need to get it to a dealership or someone with a dealer level scan tool and attempt to access the cruise control module. If there is no communication, the PCM is not cruise enabled. Remember the system is fully integrated there, so there isn't going to be a fuse or anything simple like that.... if the engine runs, the PCM works, and so if the cruise is enabled you will have communication.
If there is no communication and therefor no cruise enabled, you will need to source a cruise enabled PCM (find the VIN from a same-engine/transmission equipped same year model that has cruise and order for it).
If there is communication then they will want to go to the data list where the buttons can be monitored for pulse and then check to see if the buttons are all inoperative. If they are, then it is likely you are missing some wiring in between the wheel and the PCM. Specifically I have seen the clock spring (rotating part in the column) be missing these pins on non cruise or non hands free models, and this is your most likely culprit, that there is just nothing to connect the button signal to the rest of the vehicle. If there is wiring in the clock spring then you will need to just start tracking back from there until you find the wires missing. At that point it would be a custom job adding in wiring as these are not plug and play harnesses... they are either equipped or not but do not have patch wiring to add it or anything like that.
Yes, PCM is the same as ECU (Programmable Control Module versus Engine Control Module).
Yeah it is weird what they do and do not wire for in these cars. The telephone buttons are in 95% of the vehicles even though the function is only in 30% etc. It makes you wonder why they save those 5% from having the wiring etc.
Check the communication to the cruise control module directly via full function scan tool. If it reads it, then you will have wiring to contend with. If it doesn't read it (it should report back the same part number as the engine ECU when you pull it up via the MFI module), then the ECU is not equipped for it.
We are concerned with scanning the cruise control module itself. This is what is important.There isn't anything really that should have been affected in the live data outside the cruise module that would have changed simply by plugging in the wheel.