Kess V2 Disable Mazda RX-8 Speed Limiter Guide

Here’s the turoial to disable the speed limiter on the Japanese ( JPN ) right-hand drive Mazda RX-8 SE 1.3L AT.

Disclaimer: The guide was translated from Russian. It is only for education purpose. Credit to  P1on3R91. You are at your risk.

In this car, a 180 km / h limiter is installed. It seemed it would be easier to turn it off. But after counting the firmware, I ran into the problem of finding a calibrator who would help me with this question.

As a result, the next day after reading the firmware, the right person was found and prepared everything. Next, I poured the calibrated firmware back, and only recently the owner of the car was able to verify the performance of the firmware.

I said : “hello all the cool limiter was shot before 220 dispersed further the place was not enough.” Of course, I did not doubt that everything will work, but I still do not publish short articles-posts until everything has been fully checked. Something like this. With the lyrical digression is over, now is standard on the plan description of the process. Steering wheel to the right:

Go. Launch Kess V2 Master software:

We choose Mazda RX-8 232hp with Denso control unit :

First we make identification:

VIN nr .: SE3P105292
ECU type: DENSO SH7055
Now start reading:

Almost everything was considered:

Ignition OFF:

The reading was completed successfully, the total time is 2 minutes:

Then open PCMFlash with Denso-module, it was connected through Tactrix OpenPort 2.0 ecu flash cable and too counted identities:

Adapter: Tactrix Inc. – OpenPort 2.0 J2534 ISO / CAN / VPW / PWM
DLL: 1.01.4250 Apr 24 2014 09:33:35
Firmware: 1.16.4647
Module: Denso: SH7055 / SH7058 (S) / SH7059 FLASH (512KB / 1024KB / 1536KB)
Identification
Entering the programming mode
Transfer of the loader
Checking
Computer type: SH7055
Flash: 512KB
Calibration: 60E09Z20
Done.
And also counted Flash , as well as Eeprom from this block, as it always would be.
The resulting file N3YL18881_SW-N3YLEB000.bin is sent to the verified calibrator, we pay as much as we need and we get the correct modified file by the answer.

Now we will write the modified firmware file. Press the record, select the file, and several more times confirm:

Half poured out:

Almost completed:

 

Ignition OFF:

The recording was completed successfully, in about a minute and a half:

Now you need to delete all the errors that occurred. Go to the Tool menu :

Go to Del Errors:

Further we agree as many times as Kess v2 will require, everything is standard, nothing new:

Instrument panel:

Mission accomplished. Now the owner will be pleased.

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