alexwr92
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- Feb 21, 2015
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i have a cruise control unit on my car that i have installed i have activated it on the multiecuscan but its still not working any idea why ?
i have a cruise control unit on my car that i have installed i have activated it on the multiecuscan but its still not working any idea why ?
Wiring looms in cars are funny things, depending on the build can mean a different loom is fitted for seemingly the same job.
The switch on the steering column connects to the dashboard wiring loom, for cruise control to work the wiring has to be in the loom to carry the signals.
There may be no extra plugs on the switch when you connected it, you connected all the multiplugs there but were there any gaps or holes in the multi plug. I,e the plug has 10 places for a wire but only 9 of them are used.
Then the wiring has to join up with the wiring in the engine bay, this is not one full loom it’s bits that all clip together to carry the signals where they need to go.
Again if the wiring is not on the engine bay loom it won’t work.
I also remember from my old punto HGT, which had cruise control, there was a plug under the fuse box which was causing the cruise control to work intermittently, if there are extra wires that carry power from somewhere else under the bonnet, and these are missing the cruise control won’t worked.
The wiring issue is that, is the wiring from the column stitch to the engine ecu, complete and uninterrupted. If the wiring is not there 100% it won’t work.
Even if the wires seem to be there both ends, at the switch and at the ecu that doesn’t mean there isn’t still a gap in the middle somewhere.
If mes won’t allow you to test the cruise control light on the dash you have to wonder why, lack of bulb or lack of software in the body and dash computers to allow it to work.
Have you changed the brake switch and the clutch switch? These are both different in cruise control models. Also what year is your car? Grande Puntos come in two series and the wiring is slightly different in little place between the two models, for example the headlight connectors
"Strange" problem? Not at all.
Your suspicion is correct. Different gear ratios (so car doesn't know which gear this is - engine rpm doesn't match car speed).
MES will not fix this probably (>90% sure). This is ECU/BodyComputer (or some other module) software issue. You need some "hacker" to modify this (tweak "memory dump").
I hoped that MES would help me with this, but one person told me something like you. That i must go to some remap tuner who knows about this so he can write parameters in ecu which knows correlation between rpm and km/h. So i email all tuners around me, and even official fiat dealer service. But they all told that they don't know nothing about that.
Thank you on your opinion.