openecu.org

Posted: **Sat Oct 04, 2008 1:10 am**

Hi there,
first of all.... thank's to all contributors of this forum. Great forum, lots of expertise and experiences.

I have a Land Cruiser hdj100 mdl.2001, it has a Denso ecu. Toyota dealer can reprogram the ecu through dlc3-connection, but then i am stuck with org. software. As far as i know Toyota are using modb protocol and the only obd-kit i can get for this is the EFI-Scan, but i don't know if i can reprogram engine-ecu with it. Anyone knows?

Here are some pictures of the Denso ecu. It's almost identical to Subaru ecu's i have seen other places in this forum.
I have searched after the chips but with no luck.
If anybody can help identifying the chips on this ecu, it will be much appreiciated.

Big chip no: 1.51808-3351
Smaller chip: SE446 - Second line: 5C07
Little "old" 8pin DIL: 4C26 - Second line: SE293

Posted: **Sat Oct 04, 2008 1:12 am**

Picture of the little "old" one.

Posted: **Sun Oct 05, 2008 4:45 pm**

I know nothing about these, but I do know that just because the ECU is made by the same company as the Subarus, this does not mean the reflashing methodology is identical or even similar. In fact I will almost guarantee that they have their own way of doing things.

The exception will be ECUs that support J2534 pass-through programming. Even then, each manufacturer has their own security algorithm for 'getting in' to read and reflash.

Posted: **Sun Oct 05, 2008 6:46 pm**

Do you have pictures of the reverse side of the ECU?

Posted: **Mon Oct 06, 2008 2:41 am**

Radsdau: I'm afraid your informations are correct, but i think there must be a workaround to "lift-off" the software. Of course the passthru programming would be the pleasant way.

Intrawrx: Yepp, here it is.

Posted: **Mon Oct 06, 2008 3:05 pm**

shoel wrote:...there must be a workaround to "lift-off" the software. Of course the passthru programming would be the pleasant way.

See if you can find a factory flashing tool.

Posted: **Tue Oct 07, 2008 2:30 pm**

radsdau wrote:See if you can find a factory flashing tool.

That's too expencive(about $6000), but if i can get help identifying the cpu. then maybe i can use my Xeltec programmer or EFI-scan.

Posted: **Tue Oct 07, 2008 4:21 pm**

I wonder if its a HC16 variant, maybe trace a few of the legs of the MCU to see if they have provided nice neat solder pads.

openecu.org

Toyota -> Denso ecu component identification

Toyota -> Denso ecu component identification