Mazda3 and Mazda CX30 from year 2020 have S6J329CPLS Spansion mcu on Speedo. They are equipped with VISTEON cluster and have no EEPROM.
Mazda 3 2020 cluster
Picture from the other side of PCB.
BTW, the needles does not have to be removed in this cluster to reach both sides of the PCB.
It has S6J329 Spansion mcu.
It is different from the S6J3001 that DENSO uses in Toyota’s clusters(RAV4 2019, Corolla 2020). (Check Toyota S6J3001 mileage correction)
If you replace the cluster you can see there is no mileage there. The km are not in the dashboard.
Where is the km stored in Mazda3/CX30 2020?
Mileage stores in BCM not the dash.
Mileage data stores in bcm-chip R7f7010033.
The location of this BCM BCKA 67560 is under the driver side.
Just above the small fuse box behind the plastic cover, just on the side f the driver’s left leg.
Mileage storage is in SPC5746 or SPC5748 IC.
Is there a tool that can handle S6J329CPLS dashboard? CG100 has no connection for this.
1). replace 1 bcm of another car, the number of kilometers changes accordingly