Odometer Calculator Software4/18/2021
This is why you should use a hot air station so it heats all the pads evenly and you can just pick the chip off the board instead of prying it.YouTube Video: DIY Honda Odometer Reprogramming Disclaimer: 1.The information provided should only be used to correct mileage information.Use care and caution when dealing with delicate components, and practice first on a spare cluster.
Odometer Calculator Software Download Step 1Add Tip Ask Question Comment Download Step 1: Introduction Lets say you swapped an instrument cluster from a coupe to a sedan to change the look or color of the needles, or youre replacing a defective cluster. The mileage on most (Japanese) cars is stored on the instrument cluster itself, and not in the ECU. Therefore the mileage of the original vehicle that the cluster was from will be displayed on the dash. Odometer information is stored on a small EEPROM chip on the circuit board. The chip can be read and written to using a serial programmer. The odometer information can be copied over from the old cluster to the new cluster using Honda HDS, assuming the original cluster is operable. What follows is a hack-around to using HDS, by programming the mileage directly to the chip. You can also opt to merely swap the chips, or copy and paste the program, rather than decode. ![]() Take a photo of their home position before taking this apart so you know where to realign it upon reassembly. Use gloves and dont touch the black face of the gauges, its a fingerprint magnet. Once the gauge face is removed, remove the white backing plate revealing the circuit board, with the L56 EEPROM chip. Add Tip Ask Question Comment Download Step 3: Solder Hookup Wires According to the datasheet, pins 1, 2, 3, 4, 5 and 8 will need to be connected for programming. To read the information off the chip, while its still in the cluster, we need to solder some hookup wires to the leads. If you use a multimeter you can trace the leads to the pads on the other side of the circuit board, and then solder some hookup wire. Now before you can properly read from the chip, on board, you have to short the crystal, located to the top left of the EEPROM chip. Add Tip Ask Question Comment Download Step 4: Programming Hardware Setup This is the EEPROM programmer I built to connect the chip to my desktop computer. All it is are three 5V zener diodes (1) and three 4.7K ohm resistors (1). Using the PonyProg software, I was able to read and save the information from the odometer chip. The EEPROM must be removed from the board if you want to write to it, as it cant be programmed in circuit. So off we went trying to desolder an SMD chip And SNAP The leads broke off the chip.
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