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Best motorcycle ecu flash software4/11/2024 What is inside the ECU is basically just a bunch of numbers. When it reaches 10,000 the software will not let you change the yosh value anymore. In fact every time you write a new yosh box value into the ECU the software increments a counter in the memory location next to the value. I and others are working on a real time software patch so the ECU can be adjusted during the dyno run real time and then just flashed once at the end of the session.īTW the Denso ECUs have a second smaller external serial EEPROM chip that holds the factory fuel trim or 'Yoshbox' values. Right now there is no way to real time tune these ECUs which means its a trial and error process that will require many reflashes. It becomes more of an issue with fuel tuning. This is really isn't issue if you just want to change your limiters. The actual number will vary from ECU to ECU. I've talked to several car guys many of them have exceeded this limit. The same ECU is used in a variety of Denso and Mitsubishi ECUs used in cars. The datasheet specs on the hd64f7052 MCU used in the Denso ECUs states an absolute minimum of 100 flashes. Stay tuned for part II, how to edit maps.Īll you have to do to restore the ECU to its stock condition is flash the original stock base map back into it. Once the device is connected you follow this simple procedure to flash the ECU. Check the manual for a ECU pin number identification drawing. Pin numbers and wire colors are shown in the schematic. If I were setting this up I would remove two of the 'Yosh' plug pins and reinsert them in the FWE, RESET pin holes. It is possible to remove the wire harness ecu pins form one hole and reinsert them in another. The FWE and Reset lines have no pins installed in the wire harness connector. The two serial wires needed to flash the ECU run from the ECU connector to the Suzuki Diagnostic System connector under the seat next to the 'Yosh' plug. Of course the ground between the USB-TTL device must also be connected to the ECU ground so the signals have a common reference. The USB-TTL device just happens to have a 5V power line we can use for the FWE switch and a ground wire for the reset switch. In addition to the serial communications we need to provide a switch that will connect the FWE line to 5V to put the ECU in boot mode and a momentary push button switch to ground to reset the ECU when we switch modes. The other end of the cable has TTL serial wires that can be directly connected to the serial in/out of the ECU. The USB end of this cable plugs into your PC/Laptop and appears to the FDT software as just another COM port. We need to provide a level converter if the two are going to talk to each other.įortunately you can buy a USB device that has a USB to RS232 to TTL converter built right into the molded plug for $20. The only problem is your PC uses a serial COM port that is RS-232C standard -10, +10 volt logic signals while the ECU uses TTL or 0, 5 volt logic signals. FDT knows how to establish communications with the ECU, command it to reflash, and download the map data. Renesas (formerly Hitachi ) the manufacturer of the CPU chip inside the ECU that we need to flash provides free software they call the Flash development Toolkit or FDT. The reset line is needed to restart the ECU software when you switch between normal and boot modes. The FirmWare Enable line or FWE is used to switch the ECU from normal operating mode into a boot loader programming mode. The serial data in and out are used to establish a communications link with the ECU to transmit the data to be flashed. A serial data in, serial data out, FWE, and reset. There are 4 pins on the ECU wire harness connector used to reflash the ECU. Having seen the success we had with the Hayabusa people immediately started asking can you do the GSXRs too? This technique has already been proven to yield results on ZX-12 and Hayabusas. In general remapping the stock ECU will yield better results than a piggy back unit like a Power Commander but it will be harder to do. With these tools you can make simple modifications like adjusting the RPM limiters or removing the 186mph limit or if your in to tuning you can also adjust the ignition, speed density, and Alpha-N fuel maps. I prefer Enginuity which is freeware written by some Suburu WRX guys to modify their Denso ECUs. Some are freeware/demo versions of professional software others are just freeware. There are several software programs to view and edit the map data also available for free. The PC software to reflash the CPU chip inside the ECU is available free from the chip manufacturer. Following are instructions on how to reflash the memory of the stock ECU ( 32920-41G10) of an 05/06 GSXR-1000 using an interface to a personal computer or laptop you can build yourself with about $30 in parts.
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