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- Aug 1, 2021
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- 3
Anyone know where I can get the mileage adjusted on my FD cluster? Had my cluster repaired and the odometer went berserk and reset to 0 miles
Mileage adjustment
- Thread starter Adamcmaclean
- Start date
I've had the same challenge - it's stored on the speedo board under something called "EEprom" but if it's reset it might indicate the board is bad. There's a contact in Canada who does full checks & fixes for the full tach but postage can be expensive. I've got some going out to him around Christmas if you'd want me to throw yours in?
I believe a fix yourself can be quite difficult - there's some threads on the rx7 club about doing it yourself but looks a bit witchcraft and wizardry.
I believe a fix yourself can be quite difficult - there's some threads on the rx7 club about doing it yourself but looks a bit witchcraft and wizardry.
casey
Active member
- Joined
- Apr 24, 2018
- Messages
- 72
I'll mention that following a couple of successful repairs of FD clusters for owners earlier this year (including Rikmister1 on this forum), I recently bought a batch of the chips (93C56EN) which store the FD mileage, plus a programmer. TBH though, I'm not sure how quickly I will get around to checking the chips and programmer to see if it all works as expected. But, if you are interested in sending me the cluster for repair (I'm based in Colchester), then I might try to get around to it sooner.
If the programmer and chips do work as expected, it will be a simple matter of getting some proof of the original car (V5 copy to verify owner, plus mileage at last MOT, etc), programming the value into the chip, then replacing it on the CPU board. Cost will be less than £100 + shipping costs (or you can drop/collect to me).
Pic of the chips and programmer that recently arrived with me and photo of the relevant chip on the cluster CPU PCB
Links to my work so far on FD clusters:
MRC FD Cluster Topic
If the programmer and chips do work as expected, it will be a simple matter of getting some proof of the original car (V5 copy to verify owner, plus mileage at last MOT, etc), programming the value into the chip, then replacing it on the CPU board. Cost will be less than £100 + shipping costs (or you can drop/collect to me).
Pic of the chips and programmer that recently arrived with me and photo of the relevant chip on the cluster CPU PCB
Links to my work so far on FD clusters:
MRC FD Cluster Topic
casey
Active member
- Joined
- Apr 24, 2018
- Messages
- 72
Some pogress on this. The programmer is successfully set up and I can read and write to the new chips which hold the mileage data. All I have to do now is work out how the chip (hexadecimal) coding corresponds to the mileage displayed on the odometer. I have some clues from a chip removed from failed FD board - but with no odo display (display driver chip failure), but the chip contains data, just not able to see it on the display! I'll be transferring this chip over to a working board, so I can see the relationship between the data in the chip and the mileage displayed. I should then be able to work out how to prgramme the new chips with the correct hexadecimal coding.
