R400 Duratec speedo code help, please

R400 Duratec speedo code help, please

Author
Discussion

JONSCZ

Original Poster:

1,178 posts

237 months

Tuesday 30th April 2013
quotequote all
Hi all.
I've had my R400 Duratec for a couple of months or so now and loving it.
However, I wanted to check the accuracy of the speedo as it seemed to be over reading by 10% (I've since learned that 'they all do that, sir'...!).
So, armed with the code given to me by Caterham, I tried to reprogram the speedo via the trip button pressed in whilst turning on the ignition. This code for my setup (R400D, LSD, 13" wheels) was 041306.
I noticed that the code on my ANALOGUE speedo was nothing like this, so (and here's where I made my mistake) I changed it to the 041306 WITHOUT NOTING THE ORIGINAL NUMBER!). SO, pleased with myself, I pressed the trip button again only to find ANOTHER code setup with the correct 041306 code already in there!
So, (and sorry for 'wordy' explanation above) if there's anyone out there with a R400D with LSD and 13" wheels who doesn't mind checking, please can I ask if someone would supply me the 'other' code (ie not the 041306 one) - there was possibly a 3 and a 9 in it - I can't remember, though!!
I seem to remember that there was a "set DSP" and "set DPP" or something like this on the speedo mileage display when programming it. (as I mentioned, to get into the programming menu, press the trip button whilst turning on the ignition - don't change any numbers, though!) I'm not sure what the 'other' code is even for - my changing it did not affect the accuracy of the speedo or the mileage driven at all.
Or if anyone knows what this other code is actually for and if it's relevant, then I'd appreciate that info, too. Also which of the 'DSP' or 'DPP' (or whatever they are called) relates to the 041306 code now as I don't know which is which now...!!
Hope you can help.
Caterham have offered their help, but don't have another car in with my spec to check with atm.
Thanks in advance.
Jon

DCL

1,216 posts

179 months

Wednesday 1st May 2013
quotequote all
39751 on mine. At the SVA I was told it was the one of the most accurate they'd seen. Legally I believe it should be between +0 and +10% error. So, if it is 10%, then yours is on the higher end. The rear 13 inch wheels (with CR500s) are the same rolling diameter as the 15 inch.

Edited by DCL on Wednesday 1st May 08:50

nigelpugh7

6,038 posts

190 months

Wednesday 1st May 2013
quotequote all
Hi Jon,

I was thinking I should be able to help as my r500 is pretty much the same spec.

However i think after re reading your post that you probably have the analogue speedo, and not the stack set up I have in my r500.

Please let me know and if yours is the stack type dash, I will try the same on mine, but I think,our settings refer to the wheel size and not a code.

Cheers,

Nige.

JONSCZ

Original Poster:

1,178 posts

237 months

Wednesday 1st May 2013
quotequote all
Hi again.
Many thanks to both of you for helping.
DCL, can I ask what the 39751 code is - is it the set DSP or set DPP code (or whatever they're called if not these). Also, is your other code the 041306 number?
That does sound like it could be the one. I'll try it (if you can let me know which setting it refers to). Thanks for the info.
Nigel - yes, you're right, mine has the analogue dials not the stack. Thanks for posting, though. (oh, and I must add that your 'youtube' videos were a huge contributing factor to me buying a Caterham in the 1st place). Not sure whether to say a big thanks and thumbup , or to come and 'have a word' as you've played a big part in me now being £££-broke...!! (but happy broke).
If anyone else has any different codes, then it'd be great to have these to try.
Thanks again.
Jon

DCL

1,216 posts

179 months

Wednesday 1st May 2013
quotequote all
Just checked it again and there seems to be only one code on mine, maybe it's an earlier version.

nigelpugh7

6,038 posts

190 months

Wednesday 1st May 2013
quotequote all
JONSCZ said:
Hi again.
Many thanks to both of you for helping.
DCL, can I ask what the 39751 code is - is it the set DSP or set DPP code (or whatever they're called if not these). Also, is your other code the 041306 number?
That does sound like it could be the one. I'll try it (if you can let me know which setting it refers to). Thanks for the info.
Nigel - yes, you're right, mine has the analogue dials not the stack. Thanks for posting, though. (oh, and I must add that your 'youtube' videos were a huge contributing factor to me buying a Caterham in the 1st place). Not sure whether to say a big thanks and thumbup , or to come and 'have a word' as you've played a big part in me now being £££-broke...!! (but happy broke).
If anyone else has any different codes, then it'd be great to have these to try.
Thanks again.
Jon
Jon, no probs, sorry I could not help.

Glad you liked the YouTube videos too, and sorry they made you spend your money too! smile

However it not just you, I seem to have influenced lots of people who have bought Caterhams as a result of my YouTube videos, quite a few have even bought new R500's as a result too.

Hope you get your speedo settings sorted out too!

PINGUY

45 posts

159 months

Wednesday 1st May 2013
quotequote all
On my R300 Duratec with 13" CR500 I had to put following code to get a perfect accuracy: 27544

Edit the 06 May: Of course this code is for km/h.....for MpH it shoul logically something in the region of 27544 x 1.609344 = 44328

Edited by PINGUY on Monday 6th May 19:57

JONSCZ

Original Poster:

1,178 posts

237 months

Wednesday 1st May 2013
quotequote all
Thanks for checking everyone.
This seems to be getting more and more confusing.
Anyone know who makes the dials as I might have to have a chat with them.
Caterham were sure that I needed the 041306 code for my setup.
I am finding that my speedo is less than 10% over now - but still over, nevertheless.
Any more ideas?

JONSCZ

Original Poster:

1,178 posts

237 months

Thursday 2nd May 2013
quotequote all
OK. Finally got to the bottom of this.
There is another code, but it's *0000 - basically not used.
The code I had in there initially was 039558 - Tim at Caterham very kindly supplied this to me today.
This code made the speedo over read by 10%. Meaning not only the speed, but also the mileage would have been over, too.
I replaced it with the 041306 code a couple of weeks ago and this improved the accuracy, but it still over read.
Today I spoke to a really helpful guy at Caerbont who make the speedos and he suggested to increase the 041306 number by roughly the amount that the speedo over reads by. I tried increasing it to 043371 (ie + 5%) and this was absolutely spot on with 2 different GPS devices. So, as I wanted a bit of leeway, I adjusted it to 042545 (ie + 3%) and this means the speedo over reads by approx 2 mph which is just the right margin.
I realise that this is immensely boring for most of you, but if anyone is having problems with their speedo accuracy, then this method might help.
(btw, my settings above are for R400, LSD, tyre - 175/55/R13 F and 205/55/R13 R - with the CR500's on - in case this helps anyone.)
Thanks again to all who helped.
Cheers,
Jon

nigelpugh7

6,038 posts

190 months

Friday 3rd May 2013
quotequote all
JONSCZ said:
OK. Finally got to the bottom of this.
There is another code, but it's *0000 - basically not used.
The code I had in there initially was 039558 - Tim at Caterham very kindly supplied this to me today.
This code made the speedo over read by 10%. Meaning not only the speed, but also the mileage would have been over, too.
I replaced it with the 041306 code a couple of weeks ago and this improved the accuracy, but it still over read.
Today I spoke to a really helpful guy at Caerbont who make the speedos and he suggested to increase the 041306 number by roughly the amount that the speedo over reads by. I tried increasing it to 043371 (ie + 5%) and this was absolutely spot on with 2 different GPS devices. So, as I wanted a bit of leeway, I adjusted it to 042545 (ie + 3%) and this means the speedo over reads by approx 2 mph which is just the right margin.
I realise that this is immensely boring for most of you, but if anyone is having problems with their speedo accuracy, then this method might help.
(btw, my settings above are for R400, LSD, tyre - 175/55/R13 F and 205/55/R13 R - with the CR500's on - in case this helps anyone.)
Thanks again to all who helped.
Cheers,
Jon
Glad you got it sorted Jon!

Will you be going to Stoneleigh this weekend?

If so,I will be there on Sunday, should be parked on the Lotus Seven Club stand.

Might see you there.

Nige.

JONSCZ

Original Poster:

1,178 posts

237 months

Friday 3rd May 2013
quotequote all
Thanks for your post, Nigel.
No, I am working all the bank holiday, so can't make Stoneleigh.
Have a great day out - and post some pics on here!
Cheers,
Jon

Spaceibiza

64 posts

110 months

Monday 30th March 2015
quotequote all
JONSCZ said:
OK. Finally got to the bottom of this.
There is another code, but it's *0000 - basically not used.
The code I had in there initially was 039558 - Tim at Caterham very kindly supplied this to me today.
This code made the speedo over read by 10%. Meaning not only the speed, but also the mileage would have been over, too.
I replaced it with the 041306 code a couple of weeks ago and this improved the accuracy, but it still over read.
Today I spoke to a really helpful guy at Caerbont who make the speedos and he suggested to increase the 041306 number by roughly the amount that the speedo over reads by. I tried increasing it to 043371 (ie + 5%) and this was absolutely spot on with 2 different GPS devices. So, as I wanted a bit of leeway, I adjusted it to 042545 (ie + 3%) and this means the speedo over reads by approx 2 mph which is just the right margin.
I realise that this is immensely boring for most of you, but if anyone is having problems with their speedo accuracy, then this method might help.
(btw, my settings above are for R400, LSD, tyre - 175/55/R13 F and 205/55/R13 R - with the CR500's on - in case this helps anyone.)
Thanks again to all who helped.
Cheers,
Jon
I know this is an old thread but just wanted to say thanks for helping me sort my speedo out. I too was told to enter 041306 but mine was still reading 15% above what it should. After reading this thread, I added 15% to 041306 and it's perfect now! If anyone is having speedo accuracy problems this really works!

JONSCZ

Original Poster:

1,178 posts

237 months

Monday 30th March 2015
quotequote all
Hi Noel.
Thanks for your kind comments.
Glad you got it sorted.
Cheers,
Jon

nigelpugh7

6,038 posts

190 months

Monday 30th March 2015
quotequote all
Holy thread resurrection batman!

Glad it was all sorted in the end too!

Gregs79

86 posts

130 months

Monday 30th March 2015
quotequote all
Jonscv,

I will be looking at mine at the weekend and altering as I don't want the mileage over reading by that amount! Are you able to provide me with any instructions on how to do this calibration? If so please message me.

Kind regards

Gregs

JONSCZ

Original Poster:

1,178 posts

237 months

Monday 30th March 2015
quotequote all
Hi Gregs.
I must be honest that as it was a couple of years ago I have forgotten how to do this, but looking at Caerbont's website, I think that this link is the programming guide (if yours is the latest version with the digital display of mileage, not the analogue version) - http://www.caigauge.com/page28.html (the 'programming button' referred to is the trip reset button).
I seem to remember that when you get the digits flashing, it was simple to do. If you make a mistake with the digits, then just turn off the ignition and start again.
Good luck with it.....!
Cheers.
Jon