iecutool

Automotive ECU Tools

iecutool

Automotive ECU Tools

FormulaFlash 1.1.0.0 Supports Toyota Gen3 Denso ECUs

FormulaFlash ECU programmer released new software version 1.1.0.0 in January 2026.

FormulaFlash V1.1.0.0:

UPGRADE DETAILS

NEW PROTOCOLS ADDED

Denso 3rd generation

Toyota Auris 2019–2021 DENSO GEN3
Toyota Avalon 2018–2021 DENSO GEN3
Toyota CH-R 2019–2022 DENSO GEN3
Toyota Camry 2018–2021 DENSO GEN3
Toyota Corolla 2019–2022 DENSO GEN3
Toyota Crown 2019–2022 DENSO GEN3
Toyota Harrier 2018–2022 DENSO GEN3
Toyota Highlander 2019–2022 DENSO GEN3

Toyota Hilux/Vigo (8th) 2020–2022 DENSO GEN3
Toyota Innova 2016–2020 DENSO GEN3
Toyota Kluger 2019–2022 DENSO GEN3
Toyota Land Cruiser 2020–2022 DENSO GEN3
Toyota Levin 2019–2021 DENSO GEN3
Toyota RAV4 2019–2021 DENSO GEN3
Toyota Venza 2020–2022 DENSO GEN3
Toyota Yaris 2018–2022 DENSO GEN3

Read, write and checksum correction without disassembly or external adapters.

Toyota Gen II and Gen I ECUs coming soon.

AC Delco

ACDELCO T87A (TCM), SPC564A BENCH read/write,
ACDELCO T87 (TCM), SPC564A BENCH read/write,
ACDELCO E82 BOOT mode read/write + checksum MPC5676,
ACDELCO e730/35/40/45/50 (TCM), MPC555 BENCH read/write,
ACDELCO E87 BOOT mode read/write + checksum MPC5565,
ACDELCO E92 BOOT mode read/write + checksum MPC5674,
ACDELCO E98 BOOT mode read/write + checksum MPC5674,

ECU DATA CENTER IMMO OFF MODULE

BMW Mini MSV70,
GM series, Cadillac, Buick, Chevrolet, Opel E37, E38, E67, E78,
Citroen, Peugeot ME7.4.4, ME7.4.5,
Toyota Denso 3rd generation.


FormulaFlash 1.1.0.0 Update Toyota Gen3 Denso ECUs via OBD + Bench
FormulaFlash 1.1.0.0 Update Toyota Gen3 Denso ECUs via OBD + Bench


Launch X431 ECU Programmer for Replacing Mercedes DSM FBS4

How to replace Mercedes-Benz W212 DSM A0002703452 (FBS4) with Launch X431 ECU & TCU programmer on bench?

Quick search DSM, choose DSM and Bench mode.


Replace Mercedes DSM FBS4 with Launch X431 ECU Programmer

Check wiring diagram.


Replace Mercedes DSM FBS4 with Launch X431 ECU Programmer

Connect DSM FBS4 with Launch X431 ECU programmer according to the diagram.


Replace Mercedes DSM FBS4 with Launch X431 ECU Programmer

Read module information


Replace Mercedes DSM FBS4 with Launch X431 ECU Programmer

Read EEPROM data
Read and save original data.


Replace Mercedes DSM FBS4 with Launch X431 ECU Programmer

After reading data, exit directly and replace the donor Gearbox that needs to be replaced.
Connect the donor Gearbox with Launch X431 ECU programmer.
Read module information and read eeprom for the donor gearbox to back up data.


Replace Mercedes DSM FBS4 with Launch X431 ECU Programmer

Select Personalization.

Upload the original gearbox eeprom data and personalize data.


Replace Mercedes DSM FBS4 with Launch X431 ECU Programmer

Persianization successful.


Replace Mercedes DSM FBS4 with Launch X431 ECU Programmer

New gearbox needs to be programmed to start. Use MB star device for programming and coding.

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Fix AutoTuner Software Crashed When Reading ECU

Problem: Still having issues with autotuner, it stuck on reading ECU page and crashed. maybe someone been through this?


AutoTuner Software Crashed Solution

Solution:

Delete Autotuner, re-install software and try new USB cable.

Solving MMS Flex EDC17 ECU Bench Reading Issue

Problem: I couldn’t read EDC17c74 with Flex programmer on bench i had read that ecu one year ago no problem. or maybe my flex box is the problem?


MMS Flex Cannot Read EDC17 ECUs on Bench Solution

Solution:

Check if wires are not broken. It may stop working when wires were broken.

EDC17 requires pin 4 in slot A as we can see in photo he have it on 2.

It’s user error, in pinout you can see it will tell you A-4 because A-4 is terminal 15 not like A123 that are terminal 30.

Move ignition pin 2 to pin 4.

Foxflash PCR2.1 Lost Connection and Boot Recovery Solution

Problem: On ECU VAG Simos PCR2.1 I accidentally wrote wrong file with foxflash over bench. And now I lost communication with it. I made backup of eeprom and flash. Now I just try every method to write again flash. I tried with ktag boot mode but have acces only to eeprom. And with Fox Flash I have error REMOVE AND GIVE POWER. Does anyone know potential solution?


Foxflash PCR2.1 Lost Connection Cannot Recover in Boot Solution
Foxflash PCR2.1 Lost Connection Cannot Recover in Boot Solution
Foxflash PCR2.1 Lost Connection Cannot Recover in Boot Solution
Foxflash PCR2.1 Lost Connection Cannot Recover in Boot Solution
Foxflash PCR2.1 Lost Connection Cannot Recover in Boot Solution

Possible solutions

1).

Try to turn on the power supply in a few seconds as he asks you to.

Some users turned the power on after a few seconds as he wanted and then it started.
Also using foxflash make just set voltage to 14v, they will not communicate under 13.5v. ( see picture he used 13.4v).

2). Try this and write the All file back.


Foxflash PCR2.1 Lost Connection Cannot Recover in Boot Solution

3). If tried all above and still cannot recover in boot mode, the ecu is bricked and will not live, look for a new one and turn off immo.

They don’t have to match you strictly by number, you can certainly preflea it with an odyssey that suits you. Lucky for you the PCR2.1 is old and you can find them cheap. So best to buy a new one with the same reference.

The most important thing is that if your car has a lower lock, you will find the same with the lower lock of the car. And when replacing that ecu cannot be cloned, but you have to adjust it, immo given and somewhere you have a variant and immo off.

4).

Buy new ecu. And flash original frf file with odis engineering on new ecu. Don’t need old read.