Vida CEM swapping

Post by **vtl** » 17 Oct 2025, 17:57

Arty wrote: ↑17 Oct 2025, 17:52 If I understand correctly, then using this method I can get the flash from my CEM-L, modify it and write it back, right?

That's correct. Remember, one version can only read, another can only write...

Arty · Post by **Arty** » 19 Oct 2025, 09:51

vtl wrote: ↑17 Oct 2025, 17:57
Arty wrote: ↑17 Oct 2025, 17:52 If I understand correctly, then using this method I can get the flash from my CEM-L, modify it and write it back, right?
That's correct. Remember, one version can only read, another can only write...

What is cem l endadrdress?

repair · Post by **repair** » 20 Oct 2025, 09:22

vtl wrote: ↑17 Oct 2025, 10:53 It didn't go into programming mode? Both CAN-buses are wired properly?

The problem was solved quite simply.

Although before that, the SN65HVD230DR purchased from Farnell was tested with the same negative result, and the OBD cable was replaced.

When writing the sketch to Arduino, the Fastest option was selected in Tools / Optimise / instead of Faster. And all the bytes on this CEM were correctly identified after several attempts.

The same was true for the MAX3051 drivers ... .

Post by **vtl** » 20 Oct 2025, 09:26

repair wrote: ↑20 Oct 2025, 09:22 The problem was solved quite simply.

Although before that, the SN65HVD230DR purchased from Farnell was tested with the same negative result, and the OBD cable was replaced.

When writing the sketch to Arduino, the Fastest option was selected in Tools / Optimise / instead of Faster. And all the bytes on this CEM were correctly identified after several attempts.

The same was true for the MAX3051 drivers ... .

Ok, good to know. Perhaps, a similar effect to running it at full speed. Right now it is locked to 180 MHz. Comment the line with set_arm_clock (180000000); and it will run at 600 MHz if I remember correctly.

repair · Post by **repair** » 22 Oct 2025, 09:10

Searching for pin on P1 - 29 seconds...

Arty · Post by **Arty** » 26 Oct 2025, 14:03

Yeah. I successfully reconfigured my CEM-L using a USB-TTL adapter. But I'm still confused about a few things. First, the automatic door locking doesn't turn off by holding the door lock button. Although it probably shouldn't. Second, I changed the headlight settings to ABL, but this causes the headlights to come on for two seconds and then turn off. VIDA shows "undefined value." Perhaps this is because I haven't connected the HCM yet. Overall, this is a viable configuration option, but it would certainly be more convenient to do it via OBDII.

KuRowSKi · Post by **KuRowSKi** » 30 Oct 2025, 12:33

Arty wrote: ↑26 Oct 2025, 14:03 Yeah. I successfully reconfigured my CEM-L using a USB-TTL adapter. But I'm still confused about a few things. First, the automatic door locking doesn't turn off by holding the door lock button. Although it probably shouldn't. Second, I changed the headlight settings to ABL, but this causes the headlights to come on for two seconds and then turn off. VIDA shows "undefined value." Perhaps this is because I haven't connected the HCM yet. Overall, this is a viable configuration option, but it would certainly be more convenient to do it via OBDII.

You need to have a 2007 model year CEM flash installed for the autolock to work, the same applies to ABL support

Arty · Post by **Arty** » 01 Nov 2025, 08:32

KuRowSKi wrote: ↑30 Oct 2025, 12:33
Arty wrote: ↑26 Oct 2025, 14:03 Yeah. I successfully reconfigured my CEM-L using a USB-TTL adapter. But I'm still confused about a few things. First, the automatic door locking doesn't turn off by holding the door lock button. Although it probably shouldn't. Second, I changed the headlight settings to ABL, but this causes the headlights to come on for two seconds and then turn off. VIDA shows "undefined value." Perhaps this is because I haven't connected the HCM yet. Overall, this is a viable configuration option, but it would certainly be more convenient to do it via OBDII.
You need to have a 2007 model year CEM flash installed for the autolock to work, the same applies to ABL support

Okay. If I can find a dump, what else would I need to change in it besides the VIN?

KuRowSKi · Post by **KuRowSKi** » 01 Nov 2025, 12:45

You just need to swap it with your VIN and set configuration for your car with changes. I did this in 2006 S60, where I loaded the flash from my 2007 V70, which I used to run ABL.

Attached FLASH
VIN and chassis number in the file changed to X

Arty · Post by **Arty** » 01 Nov 2025, 15:14

KuRowSKi wrote: ↑01 Nov 2025, 12:45 You just need to swap it with your VIN and set configuration for your car with changes. I did this in 2006 S60, where I loaded the flash from my 2007 V70, which I used to run ABL.

Attached FLASH
VIN and chassis number in the file changed to X

Thank you so much!

Vida CEM swapping

Re: Vida CEM swapping