Problem Checksum DENSO Gen2 Toyota Land Cruiser LC76 2025

Raminkb said:

Hello friends, After reading the original file using BitBox and PCMFlash, I tuned and wrote the file back, but the car won't start. However, when I write the original file back, the car starts fine. I don't know why BitBox or PCMFlash are unable to calculate the checksum for the tuned file online. This is the first time I've encountered a problem like this.

Toyota Land Cruiser LC76 2025
GRJ76L-RKTNKV
1GR-FE 4.0 V6 Petrol – 228 HP / 360 Nm
DENSO Gen2 / newGen Type 2
MCU: D76F0219F1

Toyota Denso NEC D76F0XXX CAN
Type 2 Software number : 89663-6AJ61
Hardware number : 89661-60Y80
Car model code : GRJ7# 1GRFE
VIN : JTEEU73J7SF007787
CVN : 634395FD

I would like to ask for help and guidance.

Could you recommend a piece of software or a website that calculates the checksum for this Denso ECU model?

Best regards

Click to expand...

Bin said:

Here you go, the password is the forum's domain name. Hope this helps!
View attachment 8397

Click to expand...

Bin said:

Here you go, the password is the forum's domain name. Hope this helps!
View attachment 8397

Click to expand...

Bin said:

Here you go, the password is the forum's domain name. Hope this helps!
View attachment 8397

Click to expand...

Bin said:

Here you go, the password is the forum's domain name. Hope this helps!
View attachment 8397

Click to expand...

Raminkb said:

Can I use this software for just this one file?
Can't it be used for other files?

Best regards

Click to expand...

Bin said:

Here you go, the password is the forum's domain name. Hope this helps!
View attachment 8397

Click to expand...

Bin said:

To be honest, I made it specifically for your firmware/software number. Supporting the entire ECU range and all software versions would require a lot of time and work.

Click to expand...