Simple questions

xplosiv · Post by **xplosiv** » Fri Jun 15, 2007 4:58 pm

Hi,

Two questions here ok possible three:-

1)I have the trip computer on my 406 and was wondering why it does not show 999mpg when I am going down a hill in 3rd with the foot off the acc pedal? Asking as my dad’s 407 does and I seem to remember the old 406 estate did any ideas? ( I do need to replace the aux belt as it is fooked (slipping) and the clutch is also fooked and is getting replaced)

2)I have automatic lights on the car, why do they only seem to turn on the main lights and not put the side lights on first?

3)The main screen has very light lines going up and down it andy ideas

Thanks

Andy

mjb · Post by **mjb** » Fri Jun 15, 2007 6:32 pm

1) When the engine's above idling speed and you take your foot off the accelerator while in gear, no fuel is being sent to the engine so you're getting infinte mpg.

3) straight lines? wavy? random? Is it like the heated front windscreen found on Fords?

Post by **DaiRees** » Fri Jun 15, 2007 6:34 pm

Hi Andy

1, What does it show then? Mine shows "----", i.e infinity mpg.

2, The automatic lights only switch on the dipped headlights, they don't go through a sidelights only phase first, that would be more difficult and therefore more expensive. Do you ever use just your sidelights these days anyway?

3, No idea, has it got a heated front screen maybe, don't think they ever did them on the 406?

wes1001 · Post by **wes1001** » Fri Jun 15, 2007 6:37 pm

If you mean the digi display for Q.3 then it's sounds like a bit of screen burn or a loose/dry joint on the board.

xplosiv · Post by **xplosiv** » Fri Jun 15, 2007 6:51 pm

Hi,

Sorry need to be more clear

1) The mpg only shows 256 when i think it should be '----" or 999

3) I main the main screen (MFD), i have inverted the colouring to see if that fixes the problem

Dam the auto lights only do the main lights

Andy

mbell666 · Post by **mbell666** » Fri Jun 15, 2007 8:53 pm

xplosiv wrote:1) The mpg only shows 256 when i think it should be '----" or 999

That will be how the software(or hardware) that drives it is written, it probably uses 8 bit storage type (e.g. unsigned char) that represent 256 diffferent values, normally 0 to 255 but it probably adds one as its not expected to do 0 mpg!

Its just pug being very tight in the programming of the computer but may be because they use a 8 bit micro contoller for that bit of the computer.

Post by **Welly** » Fri Jun 15, 2007 8:59 pm

xplosiv wrote: i have inverted the colouring to see if that fixes the problem

You done what now?

Oh, and I'm a 999'er here

jameslxdt · Post by **jameslxdt** » Fri Jun 15, 2007 9:04 pm

i know mines the much better designed D8

but my trip computer also goes up to 999mpg

Post by **DaiRees** » Fri Jun 15, 2007 9:40 pm

xplosiv wrote:3) I mean the main screen, i have inverted the colouring to see if that fixes the problem

Oh that screen!

Yeah they've all got lines as far as I know, it's just cheap LCDs and high contrast. You'll get used to it, won't even notice it after a while.

Post by **DaiRees** » Fri Jun 15, 2007 9:41 pm

"Multi Function Display" by the way

mjb · Post by **mjb** » Fri Jun 15, 2007 11:19 pm

mbell666 wrote:it probably uses 8 bit storage type (e.g. unsigned char) that represent 256 diffferent values, normally 0 to 255 but it probably adds one as its not expected to do 0 mpg!

Firstly there's no such thing as an unsigned char, you're thinking of an int(eger). Secondly there's more than 256 possible values if the number is returned as (what I presume to be) a 3sf floating-point number. Either Peugeot do some really nasty reinventing of the wheel, there's an artificial arbitrary limit of 256mpg, or the D9s don't show values at any higher resolution than 1mpg (D8s show 0.1mpg to 99.9mpg)

mbell666 wrote:but may be because they use a 8 bit micro contoller for that bit of the computer.

Doubtful. IIRC my D8's trip computer uses a 16bit Atmel microprocessor, for which unfortunately the specs are only available to OEMs under NDA terms

I wouldn't expect the D9's to be 8bit, especially given the extra functionality.

xplosiv · Post by **xplosiv** » Sat Jun 16, 2007 12:03 am

Hi,

256 was a random number i pick from my head (just happens to be 8Bit)

What i mean is that my trip computer does not display high mpg when going down a hill or somthing as it should. i think the car is doing ok on fuel as i rest the average mpg counter and it is doing 37.5mpg (i would expect this as i have only been doing town runs - avg speed 20mph, distance 20mile) i think it is working as i get 55 - 60mpg at 60-70 on the motorrway just wondering why i am not getting the 300 - 400 - 999. Mine seems to just go between --- to 238.3 ( another random number) and all other 406's (D8 or D9) i have seen do the 999mpg when you have your foot off the gas (should i try a comuter reset - take the battery off for 20mins)

i have inverted the colouring to see if that fixes the problem

You done what now?

On the MFD (multi Functional display) you can either have the background in black and the text and images in orange or the background in orange and the text in black, i have found that inverting removes the lines, also the brightness of the screen does not change when i put the car lights on (id did in the last car) andy ideas or should i just un-plug the battery and reset the whole thing?

Andy

V6Exec · Post by **V6Exec** » Sat Jun 16, 2007 12:05 pm

Just to confirm the D9 does show values to 1 decimal place.

Lowest value I have seen is circa 8mpg (or to put it another way 8 gph in 2nd gear hitting the limit around 7 seconds after a standing start)

Highest is 999.9mpg

Average is circa 30mpg which is not bad really

Essexdad · Post by **Essexdad** » Sat Jun 16, 2007 12:55 pm

re.inverting the display,there is nothing in my handbook about "how to",and the display (including all others i have seen)is orange letters on an orange background,far too bright at night ! Can anyone say how to get rid of the orange background please. Just a thought,as my 406 is quite an early D9,(V),perhaps this is something on a later version ??
IMG]http://i200.photobucket.com/albums/aa26 ... 160001.jpg[/IMG]

Essexdad · Post by **Essexdad** » Sat Jun 16, 2007 12:58 pm