Vida CEM swapping

[ZRimaZ]

sorry to jump in what your talking about , is the "carconfig" option with the CEM hack ware on git. or is this a separate piece of software that is avalible ?

It is in the same carconfig

[RickHaleParker]

This one is OK!

Where is the PIN in the 68376 flash ?

[matija0610]

@6000 or @4000

[RickHaleParker]

@6000 or @4000

Is there a shuffle order ?

[vtl]

Is there a shuffle order?

No, but endianness is different (do bswap_16).

Wrote this to aid the brick CEM cracking.

Code: Select all

#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <assert.h>

int main(int argc, char *argv[])
{
    int ifd = open(argv[1], O_RDONLY);
    int ofd = open(argv[2], O_RDWR | O_CREAT, 0666);
    int i, ret;
    unsigned char buf[256];

    assert(ifd > 0);
    assert(ofd > 0);

    do {
            ret = read(ifd, buf, sizeof(buf));
            if (ret <= 0)
                    break;
            for (i = 0; i < sizeof(buf); i += 2) {
                    unsigned char tmp = buf[i];
                    buf[i] = buf[i + 1];
                    buf[i + 1] = tmp;
            }
            write(ofd, buf, sizeof(buf));
    } while (ret > 0);
    close(ifd);
    close(ofd);
    return 0;
}

[vtl]

You have to remove alarm in cem config and after - disconnect siren. If you have cem flash, send it to me, i'll remove alarm from config ( in case if you do not know, how to do it )

I'm lazy and have no free time this summer to pull off the CEM for reflashing (and cars - we've sold wife's Ford XC60, but couldn't get a replacement, so both car and truck should be on wheels at all times). Need something over OBD. Maybe I'll just pull the siren and leave the flash-over-CAN project till later.

[vtl]

You have to remove alarm in cem config and after - disconnect siren. If you have cem flash, send it to me, i'll remove alarm from config ( in case if you do not know, how to do it )

Oh, also, also... Maybe internet wisdom knows at least where to start looking at... I'm planning upgrading my tires (and suspension) from stock 27" to 29", but want to keep the speedometer/odometer sane. I know there's a tire size selection somewhere in car (CEM? TCM?). Unfortunately, 215/65R16 is the biggest size. I need to tweak that as well. So the question is: what ECU keeps the tire size?

[ZRimaZ]

Oh, also, also... Maybe internet wisdom knows at least where to start looking at... I'm planning upgrading my tires (and suspension) from stock 27" to 29", but want to keep the speedometer/odometer sane. I know there's a tire size selection somewhere in car (CEM? TCM?). Unfortunately, 215/65R16 is the biggest size. I need to tweak that as well. So the question is: what ECU keeps the tire size?

Yes, there're one or two parameters in config, depending on MY. But is is very strange with it, I have to clear it myself - on Friday I made ECM, TCM and DEM software upgrade online for my XC60 MY2016. Originally it is from USA, but already converted to EU and, of course, after upgrade everything came back to original configuration - USA, so I had to make US-EU conversion again. At the same time I decided to do the samo operation as you - adjust tyre size and tyre circumference to the real one - 235/60/R18 and 2322mm instead of programmed from factory, which is 215/55 R16 W and 2250.
Done. Config appeared OK, but DIM DTC about wrong configuration came up. Did not pay attention, because was not sute ig it was not before...
Returning from work to home just got message that traction control is off and blinking tyre pressure indicator. OK, probably puncture Stopped, checked - nothing.... Returned home not understanding what is on... At home I have no diagnostics, so at midnight (!!!) returned to work, took with me all my diagnostics and programming equipment with me and - home! Vida showed me DTC in TCM, ECM, BCM, DIM, wherever - everything about different speed on ECM and TCM and connected with it... Was sure that something went wrong with software update and decided that on Monday will do rollback to old software. But! In one moment I just remembered about the tyre size change, moved my gray mass between my ears and....sh$%^t! It could be the problem! Changed tyre config to original, made test-drive at 2 A.M. - everything wend out!
So, the answer to your question - yes, there are tyre size parameters, but....

OMG! Long-story-teller!!!

[gnalan]

I decided to adjust tyre size and tyre circumference to the real one - 235/60/R18 and 2322mm instead of programmed from factory, which is 215/55 R16 W and 2250.
Done.

235/60R18:
π*((235*0.60*2)+(18*25.4))=2322.27mm

215/55R16:
π*((215*0.55*2)+(16*25.4))=2019.73mm

Not sure where 2250mm came from...

[ZRimaZ]

235/60R18:
π*((235*0.60*2)+(18*25.4))=2322.27mm

215/55R16
π*((215*0.55*2)+(16*25.4))=2019.73mm

Not sure where 2250mm came from...

Me too. But it is from factory