dspace9 (04-08-2020)
When a drive-by-wire car doesn't receive a valid throttle position signal, the car loses its mind because it doesn't know what to do with the throttle input. I've experienced this once on a different car...but it threw a TPS code immediately. It was crazy because I was cruising along at 70mph and all of the sudden the car started losing RPMS and ignored any throttle input. The ultimate fix on that vehicle was to replace the throttle body because the TPS sensors (there were 2 of them) were built into the throttle body and it had to be replaced as an assembly.
I'm not saying that's what is going on here. I'm just throwing it out there.
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View my fuel log 2015 Mirage ES 1.2 manual: 52.2 mpg (US) ... 22.2 km/L ... 4.5 L/100 km ... 62.6 mpg (Imp)
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View my fuel log 2015 Mirage ES 1.2 manual: 52.2 mpg (US) ... 22.2 km/L ... 4.5 L/100 km ... 62.6 mpg (Imp)
This is along the lines of what I'm thinking also. From what I can find online, there appears to be a sensor in the gas pedal assembly. Not sure if it's considered a tps, however, I think it may serve a similar function. Local car parts store had one for $700....yikes! Just ordered a used one on ebay for $35 that came from a 2015 mirage donor with 14k miles on it. Figured for that price, it's worth a shot. If that doesn't work, I'll check into replacing the throttle body.
Now my question is, will I need to reprogram anything with this new pedal assembly & what that entails if so? From ebay item description: "some pedals may have to be reprogramed with your specific vehicle."
I would hate to see you start throwing parts at this. That could get expensive for you and might make your problems even worse.
Do you think you could get this condition to a point where the dealer could easily duplicate it? I'm sure if they had a scanner hooked up to your car while this is happening, they would (hopefully) be able to pinpoint the problem.
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View my fuel log 2015 Mirage ES 1.2 manual: 52.2 mpg (US) ... 22.2 km/L ... 4.5 L/100 km ... 62.6 mpg (Imp)
I had considered taking it back to the dealer, but they charge $125 just for diagnostics. Which if a $700 gas pedal was my only option, the dealer it would have been. Lol
I have a cheap obdII scan tool, but not sure what it can read. I'll have to look into it, and if it can't tell me what I need to know, it'll be a good excuse to invest in a more advanced one! Do you know if there is one that will "program" the new pedal sensor? Or would something like that have to be done by the dealership or mechanic? Or do you think it's even going to need programmed since it's coming from another 2015 mirage?
The only way I would take it to the dealer is if they can easily duplicate the condition. If they can't, then keep driving it until they can. I have a good Mitsubishi-only tech at my local dealer that I trust. Most people don't trust their dealership service department (usually for a good reason...lol).
At a minimum I would download the free Mirage service manual and see what you can learn about some of these sensors and how to test them. There may be some simple multi-meter tests you can do before you start throwing parts at it.
I don't have much experience with the drive-by-wire stuff. When I put a new drive-by-wire throttle body on my GM car, it didn't know how to idle. It idled at 2000 RPMs after I installed it. The fix for that was a dealer-only programming. Fortunately my car was a manual trans, and there was a clutch-slipping trick you could use to force the car to learn the proper idle over a period of a few days. So that's what I did.
If you do end up having to program something in your Mirage computer, you are going to be in a tough spot. A decent scan tool is going to set you back several hundred dollars (or more)...and it may not even do what you want because...well...Mitsubishi stuff can be a pain in the azz to work with in some cases.
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View my fuel log 2015 Mirage ES 1.2 manual: 52.2 mpg (US) ... 22.2 km/L ... 4.5 L/100 km ... 62.6 mpg (Imp)
Cwick (04-08-2020)
Just about any cheapo OBD tester should show how much acceleration request the pushed pedal monentarily demands. You could use that for checking its function.
The gas pedal unit on my European model is made by Bosch, so there should be many alternative sources for it. Just take a good look and read the Bosch number, and look for that number on the net. Save a lot of $$$! On the other hand, these parts are probably the most long-lasting on any car, improbable to expect them to break.
The service manual says in 17-4 to use the MUT tool for testing the pedal, something that only Mitsubishi workshops have. The procedure is on 17-5.
NB: It also says never to remove the top cover, because light falling into the insides will cause it to malfunction.
It does have the top cover on???
Last edited by foama; 04-08-2020 at 05:40 PM.