Disconecting the odometer

brandonhere · Post by **brandonhere** » 16 May 2010, 12:47

Hi all, new member here so please bear with me, I hope to purchase an '01 C5 and have a strange question before doing so. Is it possible to disconect the odometer and still drive the car. I think I have read on here that the speed sensor sends info to the suspension and gearbox (auto), but what about the Odo?
Said it was a strange question.

Cheers

wheeler · Post by **wheeler** » 16 May 2010, 14:23

I cant think of any way to do it apart from disconecting all the ABS sensors. I would imaging the car wouldnt run very good as the injection ECU needs road speed info to make calculations.

dnsey · Post by **dnsey** » 16 May 2010, 16:31

I'll ask the obvious question in return - why would you want to do that?
Apart from the dubious legality of doing so, as soon as you refitted the odometer, it would communicate with the ECU and display total milage, including that done while it was disconnected.

brandonhere · Post by **brandonhere** » 16 May 2010, 20:30

Funny you should say that, about the ECU I mean, laying in bed last night (i'm in NZ) I realised thats what would happen.
Let me put it another way, if the speed sensor is disconected or faulty, what will be the consequences, here in NZ the gestapo want $0.04c per Km tax on diesels, i'm just thinking the unthinkable.

Thanks for your reply though.

wheeler · Post by **wheeler** » 17 May 2010, 04:40

I dont believe there is a seperate speed sensor, the road speed info is taken from the ABS wheel speed sensors then multiplexed to all the other units that require it. If You disconect the complete instrument panel the odometer reading is still being counted by the BSI & will write the correct reading into the instrument panel as soon as it is plugged back in.

brandonhere · Post by **brandonhere** » 17 May 2010, 09:07

Whew, sounds pretty hi-tech. I give up, there will be NO tinkering with odometers at this end, i'm very grateful to you guys for the takin the time to answer.
Deposit paid, '01 C5 2.0 Hdi liftback, I fly down to Christchurch and drive back to Tauranga on the 29th May, can't wait.

KP · Post by KP » 17 May 2010, 11:38

It depends on how often they check as there are tools that will allow the milage to be clocked, ie for speedo replacements and so forth but i wouldn't condone this. Maybe run on Biodiesel to negate the tax?

Clogzz · Post by **Clogzz** » 17 May 2010, 11:50

fly down to Christchurch and drive back to Tauranga

Fly to Australia with it, as a million New Zealanders already have,

no odometer problems there.

brandonhere · Post by **brandonhere** » 17 May 2010, 20:38

I'm right into the Bio-Diesel I run 2 vans on the stuff, filtering waste vegie oil - 50/50, so should be sweet on the C5? Guess that'l be my main saving, I'd love Australia i'm sure, perhaps I'll put up with NZ till house prices climb again.
Cheers all.

Clogzz · Post by **Clogzz** » 18 May 2010, 15:57

I don’t know about the C5’s HDI diesel pump, but we do have people in the know.

JohnD · Post by **JohnD** » 18 May 2010, 16:12

KP wrote: Maybe run on Biodiesel to negate the tax?

Didn't think you could with C5s - well not for long!

Post by **myglaren** » 18 May 2010, 18:17

Steer clear of anything other than properly refined biodiesl on a C5, filtered WVO will cost you dear.

brandonhere · Post by **brandonhere** » 18 May 2010, 20:29

myglaren wrote:Steer clear of anything other than properly refined biodiesl on a C5, filtered WVO will cost you dear.

Really? Ouch, is there a particular part of the forum I should check out or just start searching, thanks for the heads up people.

Post by **myglaren** » 18 May 2010, 20:41

brandonhere wrote:
myglaren wrote:Steer clear of anything other than properly refined biodiesl on a C5, filtered WVO will cost you dear.
Really? Ouch, is there a particular part of the forum I should check out or just start searching, thanks for the heads up people.

Knowledge acquired from the biodiesel forum and local apocryphal tales of disastrous experiments involving C5s and SVO/WVO.