Hi,
Using the OBD to connect to the ECU, this provides some interesting data:
ECU Time Stamps (RAM): xxxx min
Functioning time (eeprom): xxxx min
Key On Counter (EEPROM): yyyy
ECU Time first DTC detection (EEPROM): zzz min
Sensors group manufacturing date: yy\mm\dd
Together with the milage, it is possible to calculate the average speed and the average distance travelled per Key on event.
In my case:
Functioning time : 211748 min
Key On Counter : 13812
Milage: 237500 km
Vehicle driven for about 13.5 years (I know the date when bought it new)
Calculations:
Distance travelled per year: 17592 km
Average speed (calculated): 237500 km / 211748 min * 60 min/h = 67.3 km/h
Average distance (calculated): 237500 km / 13812 = 17.2 km
I find this helpful, not only to get an idea about how the car is used and run, but also for checking if the stated milage of a used car is plausible.
For exampe, if the seller claims this 6 year old super special offer bargain car has only 20000 km on the clock because they "were an old lady living in (insert big city center here) which used the car mainly once a week for grocery shopping in the neighborhood", if the calculation results in an average speed of 120 km/h, that's not plausible. For an urban driver not regularly doing longer trips, I would expect an average speed below 50 km/h and an average distance probably around 5 km.
So in this example, if the real milage of the car for sale would be 80 000 km, then the average speed would drop to 1/4, that would be 30 km/h (plausible for mostly urban driving).
In such a case, I would walk away from the car because the mileage was most likely tampered with.
Using the OBD to connect to the ECU, this provides some interesting data:
ECU Time Stamps (RAM): xxxx min
Functioning time (eeprom): xxxx min
Key On Counter (EEPROM): yyyy
ECU Time first DTC detection (EEPROM): zzz min
Sensors group manufacturing date: yy\mm\dd
Together with the milage, it is possible to calculate the average speed and the average distance travelled per Key on event.
In my case:
Functioning time : 211748 min
Key On Counter : 13812
Milage: 237500 km
Vehicle driven for about 13.5 years (I know the date when bought it new)
Calculations:
Distance travelled per year: 17592 km
Average speed (calculated): 237500 km / 211748 min * 60 min/h = 67.3 km/h
Average distance (calculated): 237500 km / 13812 = 17.2 km
I find this helpful, not only to get an idea about how the car is used and run, but also for checking if the stated milage of a used car is plausible.
For exampe, if the seller claims this 6 year old super special offer bargain car has only 20000 km on the clock because they "were an old lady living in (insert big city center here) which used the car mainly once a week for grocery shopping in the neighborhood", if the calculation results in an average speed of 120 km/h, that's not plausible. For an urban driver not regularly doing longer trips, I would expect an average speed below 50 km/h and an average distance probably around 5 km.
So in this example, if the real milage of the car for sale would be 80 000 km, then the average speed would drop to 1/4, that would be 30 km/h (plausible for mostly urban driving).
In such a case, I would walk away from the car because the mileage was most likely tampered with.
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