W203 2nd Key Fault.

[the_riddler]

hi guys.
i have not put this through diagnostics yet as vehicle been sent away till monday..

First key = works perfect.
Second Key = Starts car 99% of the time but although it starts there is no power to the dash??.

any one had similar fault?

added...sorry its 2001 IR keys

[Meat-Head]

no, but you have a simular problem with your own merc didn't you.

[the_riddler]

no, but you have a simular problem with your own merc didn't you.

w639 ...with that vehicle the key was completely not reconsidered and the thing would not start..
this strangely starts but gives no power to dash.:hmmmm2::hmmmm2:

i will re flow solder in key as with the W639. but cant see how that will help with this one.
will have to wait till it comes back..

[russrace]

I have the same issue on a w203, unfortuantly it only has one key, key will always start the car but most of the time there is no windows no dash no wipers.... when you look at live data in eis or front sam you will see that TERM 15c and TERM 15r (CAN) is always off.

I did have issues before with keys doing this but i Have reflowed this one and it makes no difference, so I a suspecting a faulty EIS.

Will let you know once its fixed

[the_riddler]

had a chance to take quick look at this one today..

had a look at actual values inside Eis with Das.
both keys were identical, until vehicle was running
then the faulty Key losses power to
"15" and "15R" but only with one key, and only when running.:hmmmm:

i thought that maybe if i removed key from system and then put it back with star that may help...

Well the removing went easy, but it will not let me re activate the key now WTF.. says i need Dealer Key...

Dealer Key????

[leandroks]

Try to program the key renew it and program again, ill get the key to u...

[the_riddler]

Try to program the key renew it and program again, ill get the key to u...

i think i will leave this alone as not got a lot of experiance with keys..
and at the moment there is one good working key.
and i do not want to loose that one too..

[leandroks]

No problem needing just let me know..

[russrace]

so that means its very possible that my problem is the key:ahhhhh:

[russrace]

had a chance to take quick look at this one today..

had a look at actual values inside Eis with Das.
both keys were identical, until vehicle was running
then the faulty Key losses power to
"15" and "15R" but only with one key, and only when running.:hmmmm:

i thought that maybe if i removed key from system and then put it back with star that may help...

Well the removing went easy, but it will not let me re activate the key now WTF.. says i need Dealer Key...

Dealer Key????

You removed the key with DAS, its asking for a "green" workshop key now to reinstate it.

[the_riddler]

so that means its very possible that my problem is the key:ahhhhh:
i am really unable to comment on this fault..
i would say it has to be worth a go, if you are able to program keys..

my problem is, that currently the car is perfect with 1 key, so i don't want to make this car worse because i have little / no experience of these keys..
and i could easily make this car worse...
although as it happens we are thinking of buying this car of the customer.
so if we do buy it then, will think about a 2nd Key..

russrace
please update this thread if you fix your issue...and good luck.

[the_riddler]

You removed the key with DAS, its asking for a "green" workshop key now to reinstate it.

correct,

do you have experience of this "green key" ???
playing with buttons, that i should have left alone..:giveup:

[smayer]

correct,

do you have experience of this "green key" ???
playing with buttons, that i should have left alone..:giveup:

Read EIS, post the dump and make a New key. Thats all.

[russrace]

I made a new key and it fixed the problem

[the_riddler]

I made a new key and it fixed the problem

Thank you kindly for your update.

Glad to hear you fixed your fault :top: :top:

we have purchased this car now.. so will soon be looking at putting another key in it......

Did you use secondhand key or new Chinese key or other.?

[smayer]

Thank you kindly for your update.

Glad to hear you fixed your fault :top: :top:

we have purchased this car now.. so will soon be looking at putting another key in it......

Did you use secondhand key or new Chinese key or other.?

Second hand is cheap and easy to find, just renew the NEC chip and write new key in it.

[russrace]

Thank you kindly for your update.

Glad to hear you fixed your fault :top: :top:

we have purchased this car now.. so will soon be looking at putting another key in it......

Did you use secondhand key or new Chinese key or other.?

A secondhand key, just blanked it and reprogrammed it

[russrace]

@the_riddler
when you do your repair, why dont you try to reprogram your faulty key also, then we will learn if the problem was in sw or hw of the key. and let us know,
Thank you.