P38 MPG Display

mr_s · Mar 24, 2018

Did all P38s come with the ability to display MPG, tank range and the like? I've either not yet figured out how to display it, or there's something wrong with my 1997 DT! From what I've read, it's the buttons that you press in at the end of the indicator stalk, is that all there is to it, or is there a special trick that I'm missing?

Ta!

Saint.V8 · Mar 24, 2018

It is an on/off setting within the BeCM....they all have the ability - but not all 'specifications' of car has it turned on by default.

Diagnostics that can communicate with the BeCM should be able to change the setting.

DanClarke · Mar 24, 2018

As far as I know YES! Or at least....all my RR P38's have had it by default.
Do you not have a Drivers Handbook? You can buy them on eBay.
Press the "i" button on the indicator stalk to cycle through the displays.

mr_s · Mar 24, 2018

Saint.V8 said:
It is an on/off setting within the BeCM....they all have the ability - but not all 'specifications' of car has it turned on by default.

Diagnostics that can communicate with the BeCM should be able to change the setting.

Cheers, mine does seem pretty basic (less to go wrong?!), so I suspect it's not on. I won't lose any sleep over it, just wanted to make sure I wasn't being too 'special'!

Cheers, Martin

mr_s · Mar 24, 2018

DanClarke said:
As far as I know YES! Or at least....all my RR P38's have had it by default.
Do you not have a Drivers Handbook? You can buy them on eBay.
Press the "i" button on the indicator stalk to cycle through the displays.

I'll have another look tomorrow, I could be wrong. Doesn't sound like me though

EDIT: I don't have a handbook, but I did look at RAVE which has an owners handbook section - was for a '99 model though IIRC - just doing a sanity check really I guess

mr_s · Mar 25, 2018

Upon closer inspection, instead of buttons, there are a couple of plastic blanking caps in the end of the stalk.... It helps when you look at these things in the daytime, I thought the 'buttons' were a bit stiff....

tomcat59alan · Mar 25, 2018

I wonder if you changed the stalk and had the facility turned on in the becm it would work?

mr_s · Mar 25, 2018

Peering down the stalk, it looks as though the switches are modular as there are the sockets to accept the buttons in there. I wonder if just bunging the buttons in to my stalk would work (and turning it on in the BECM if required)... Might go and browse ebay, see if there are any cheap stalks for sale

mr_s · Mar 25, 2018

Oh, and thanks for all the assistance and help everyone, it's much appreciated

tomcat59alan · Mar 25, 2018

mr_s said:
Peering down the stalk, it looks as though the switches are modular as there are the sockets to accept the buttons in there. I wonder if just bunging the buttons in to my stalk would work (and turning it on in the BECM if required)... Might go and browse ebay, see if there are any cheap stalks for sale

Loads, £6+p&p upwards

Orangebean · Mar 25, 2018

£6 + for the stalk, but a bit more to pay someone to turn on "trip computer" in BECM if you don't have the dedicated diagnostics to do it yourself.

mr_s · Mar 25, 2018

Yep, have a couple of them in the watchlist. Off on my hols the week after next, so I'll look into it when I get back. See if there is anyone local and friendly who would look at the BECM in return for a few beers for me

Wazzajnr · Mar 26, 2018

I'm not a million miles from you and have a nanocom but it's for a petrol. However, I think it would work for BECM settings.
I have a customer in Nottingham that I visit a couple of times a year so could call in next time I'm passing if you're not in a rush.

mr_s · Mar 26, 2018

That's a great offer, thanks very much - I'm in no rush whatsoever, so if you could swing by next time you are in the area that would be grand - the kettle is always on and I'll gladly give you some beer money (or some beers!)! I'll PM you my details over

tomcat59alan · Mar 26, 2018

mr_s said:
That's a great offer, thanks very much - I'm in no rush whatsoever, so if you could swing by next time you are in the area that would be grand - the kettle is always on and I'll gladly give you some beer money (or some beers!)! I'll PM you my details over

I would change the stalk and not try to fit the buttons much easier.Tilt the steering wheel, remove two screws that hold the top of the steering cowl.two torque screws hold the stalk to a bracket,disconnect the multi plug.

mr_s · Mar 26, 2018

tomcat59alan said:
I would change the stalk and not try to fit the buttons much easier.Tilt the steering wheel, remove two screws that hold the top of the steering cowl.two torque screws hold the stalk to a bracket,disconnect the multi plug.

Cheers for the info, I'll give it a bash when I'm back off my hols and have got a stalk

Grrrrrr · Mar 26, 2018

mr_s said:
Did all P38s come with the ability to display MPG, tank range and the like? I've either not yet figured out how to display it, or there's something wrong with my 1997 DT! From what I've read, it's the buttons that you press in at the end of the indicator stalk, is that all there is to it, or is there a special trick that I'm missing?

Ta!

Not on my DT either. Something else to go wrong.

Some things need a highline BECM to work but no idea if the trip computer is one of them.

tomcat59alan · Mar 26, 2018

mr_s said:
Cheers for the info, I'll give it a bash when I'm back off my hols and have got a stalk

Toooo much info mate keep it clean.

wammers · Mar 27, 2018

Grrrrrr said:
Not on my DT either. Something else to go wrong.

Some things need a highline BECM to work but no idea if the trip computer is one of them.

It is.

Grrrrrr · Mar 27, 2018

tomcat59alan said:
Toooo much info mate keep it clean.

Is that like wood but smaller and not as hard?

P38 MPG Display

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