Instrument replacement and mileage anomaly

Jazbar said:

Hi all. I have a p38 that was imported into the country from Japan some time ago. It's a 4.0 petrol. It looks like clocks with close-to equivalent miles/km was fitted on imporr (mot miles to km adds up) but it's a diesel binnacle so the rev counter wraps off the scale!!
I've have a petrol set but when fitted, the mileage is well off. Is there any way of adjusting essentially clocking the new clocks to match currant vehicle mileage?

Thanks in advance.

Click to expand...

Datatek said:

Too late me thinks, if you have fitted clocks with a higher mileage, the BECM will already have updated to the new higher mileage.

Click to expand...

P38 Range Rover Mileage correction​

Hello any one here ever changed mileage on a Range Rover 1999 4.6 if so please give a brief explanation if possible. Thanks in advanced

Click to expand...

Fcuk up now............... ask questions later

Click to expand...

1. 
   yasser said:1st March, 2010 08:22 PM
   

   

   1. Remove dash from car.
   2.Open dash and remove all internal connectors and pcb from dash.
   3.You will see one BIG eeprom 28C16 i think it was NEC or something like that.
   4.Desolder eeprom and solder eeprom socket on it's place.
   5.Read eeprom and you will see that milleage is verry simple to change. It is not coded or secured.
   6.After changing eeprom information DO NOT PUT back in dash.
   7.Assemble dash and put in car.
   8.Give car in ignition and wait about 20 seconds then swich ignition OFF.
   9.Remove dash from car and then put chip inside.
   10.Put dash in car and then give ignition ON and new milleage must be on display.
   
   Regards.

   Click to expand...

Jazbar said:

I did some scrolling and found the below old thread. Which I've copied and pasted. Following that and looking at the inside of the clocks that contains accurate mileage, I can see the 24 pin memory chip has been desoldered and plugged in.
I'm wondering if the method below (turning on the system without the chip installed) "tricks the BECM into resetting it's counter?
What do you think?

P38 Range Rover Mileage correction​

1. 
   yasser said:1st March, 2010 08:22 PM
   

   

Click to expand...

kermit_rr said:

But if you put the original back in, it won't go back to the original mileage, as far as I'm aware

Click to expand...

pwood999 said:

It's gonna need the BECM & Instruments reprogramming by someone with the right tools.

Click to expand...

Datatek said:

Sorry, only the instrument cluster will need the mileage reprogramming, resetting the BECM to ZERO is easy. After the correct mileage is programmed into the instrument cluster, the BECM will automatically update to the cluster figure as it will be larger than the zero in the BECM.

Click to expand...