can anyone tell me whats involved in replacing my ECU with one from a similar Marea
General Ecu
- Thread starter johnson550
- Start date
Currently reading:
General Ecu
- Joined
- May 8, 2005
- Messages
- 9,053
- Points
- 1,538
about 5 minutes...
undo the two 10mm nuts holding the plastic cover over the ecu in the passenger footwell.
undo the three 10mm nuts holding the ecu to the bracket, pull the ecu off of the bracket and then pop the retaining arm on the connector to release it.
refitting is reverse of removal.
you might find it easier to undo the connector and then remove the ecu but it depends how much loom you have to play with.
Ry
undo the two 10mm nuts holding the plastic cover over the ecu in the passenger footwell.
undo the three 10mm nuts holding the ecu to the bracket, pull the ecu off of the bracket and then pop the retaining arm on the connector to release it.
refitting is reverse of removal.
you might find it easier to undo the connector and then remove the ecu but it depends how much loom you have to play with.
Ry
OP
OP
about 5 minutes...
undo the two 10mm nuts holding the plastic cover over the ecu in the passenger footwell.
undo the three 10mm nuts holding the ecu to the bracket, pull the ecu off of the bracket and then pop the retaining arm on the connector to release it.
refitting is reverse of removal.
you might find it easier to undo the connector and then remove the ecu but it depends how much loom you have to play with.
Ry
I didnt know where it was as it happened so that is helpful so is it just a case of replacing it then turning the ignition key and away or is there anything else needs doing
- Joined
- May 8, 2005
- Messages
- 9,053
- Points
- 1,538
you will probably have CODE issues.....
unfortuantely you will need to get it decoded and for the 1.9JTD ecu i'm afaird i have no idea who can do it, maybe redcar, ask him if be can 'verginise' it
Ry
unfortuantely you will need to get it decoded and for the 1.9JTD ecu i'm afaird i have no idea who can do it, maybe redcar, ask him if be can 'verginise' it
Ry
make sure you get the codebox and red key from the donor car. fitting the codebox behind the dash is a 5 min job, once you can find it.
using the red key to teach the new codebox your blue keys is easy. i cba to type it all out, the procedure is in many previous threads if you search. it takes 1 min.
using the red key to teach the new codebox your blue keys is easy. i cba to type it all out, the procedure is in many previous threads if you search. it takes 1 min.
OP
OP
ok, seen as you're a nice guy
to find the codebox you simply follow the wiring from the aerial around the ignition switch. it goes directly to a black plastic box that is behind the dash, up near the fusebox (slightly to the left or it). that box holds your key codes. it is paired with the ecu, so you must get a matching ecu and codebox.
the red key is paired to the codebox. it can be used to teach the codebox blue keys. that is the only purpose of the red key.
to teach a codebox some blue keys you must have the red key, but you msut also have 2 blue keys. both these blue keys need ot have different codes to each other.
so, lets imagine you get an ecu and codebox and red key.
fit the ecu, and the codebox.
take the red key to timpsons and ask them to make a copy using the new red key's code, but cut it using any of your original keys.
now you have a red key that works your codebox and also your locks.
finally teach the codebox your original blue keys using this procedure:
insert red key, turn to on position (mar i think its called?)
keycode light will illuminate then go out
remove red key
insert 1st blue key, turn to on positon
keycode light will illuminate then go out
remove 1st blue key
insert 2nd blue key, turn to on positon
keycode light will illuminate then go out
remove 2nd blue key
insert red key, turn to on position
keycode light will illuminate then go out
remove red key
job done, your original keys work with the new codebox and ecu.
to find the codebox you simply follow the wiring from the aerial around the ignition switch. it goes directly to a black plastic box that is behind the dash, up near the fusebox (slightly to the left or it). that box holds your key codes. it is paired with the ecu, so you must get a matching ecu and codebox.
the red key is paired to the codebox. it can be used to teach the codebox blue keys. that is the only purpose of the red key.
to teach a codebox some blue keys you must have the red key, but you msut also have 2 blue keys. both these blue keys need ot have different codes to each other.
so, lets imagine you get an ecu and codebox and red key.
fit the ecu, and the codebox.
take the red key to timpsons and ask them to make a copy using the new red key's code, but cut it using any of your original keys.
now you have a red key that works your codebox and also your locks.
finally teach the codebox your original blue keys using this procedure:
insert red key, turn to on position (mar i think its called?)
keycode light will illuminate then go out
remove red key
insert 1st blue key, turn to on positon
keycode light will illuminate then go out
remove 1st blue key
insert 2nd blue key, turn to on positon
keycode light will illuminate then go out
remove 2nd blue key
insert red key, turn to on position
keycode light will illuminate then go out
remove red key
job done, your original keys work with the new codebox and ecu.
- Joined
- May 8, 2005
- Messages
- 9,053
- Points
- 1,538
ok, seen as you're a nice guy
to find the codebox you simply follow the wiring from the aerial around the ignition switch. it goes directly to a black plastic box that is behind the dash, up near the fusebox (slightly to the left or it). that box holds your key codes. it is paired with the ecu, so you must get a matching ecu and codebox.
just like to highlight the word simply...
it might be simple for something the size of a spider to get at but trust me its near impossible to get your hand to it and undo the connectors, it must of gone in before the dash its so hard to get it!
OP
OP
ok, seen as you're a nice guy
to find the codebox you simply follow the wiring from the aerial around the ignition switch. it goes directly to a black plastic box that is behind the dash, up near the fusebox (slightly to the left or it). that box holds your key codes. it is paired with the ecu, so you must get a matching ecu and codebox.
the red key is paired to the codebox. it can be used to teach the codebox blue keys. that is the only purpose of the red key.
to teach a codebox some blue keys you must have the red key, but you msut also have 2 blue keys. both these blue keys need ot have different codes to each other.
so, lets imagine you get an ecu and codebox and red key.
fit the ecu, and the codebox.
take the red key to timpsons and ask them to make a copy using the new red key's code, but cut it using any of your original keys.
now you have a red key that works your codebox and also your locks.
finally teach the codebox your original blue keys using this procedure:
insert red key, turn to on position (mar i think its called?)
keycode light will illuminate then go out
remove red key
insert 1st blue key, turn to on positon
keycode light will illuminate then go out
remove 1st blue key
insert 2nd blue key, turn to on positon
keycode light will illuminate then go out
remove 2nd blue key
insert red key, turn to on position
keycode light will illuminate then go out
remove red key
job done, your original keys work with the new codebox and ecu.
Thanks Jug for a great explanation I think even an idiot could follow it
- Joined
- Mar 14, 2005
- Messages
- 1,829
- Points
- 422
I thought the RFID chips in the keys for the immob are write once, you'll need to get new blank RFID tags and i know a man who can i supply them.
in order to code fiat code 1 keys you have to insert the red key and turn it on and off five times in order to open the ecu to new keys then in sert the keys to be coded one at a time switch to MAR and then to the off position when finished you then reinsert the master key and repeat the on off process again to lock the ecu
they are, but you dont need to write a 2nd time
i've done it on several bravos and mk1 puntos and a cinq and it has not needed 5 times, only 1.
- Joined
- Mar 14, 2005
- Messages
- 1,829
- Points
- 422
OP
OP
think Id better wait till I see which way it is
you dont, you teach the car the original codes.
the red key is used to put the codebox into learning mode. then you can teach it any key code.
- Joined
- Mar 14, 2005
- Messages
- 1,829
- Points
- 422
If that was true then why bother swapping code boxes? I think when i spoke to Tony, he said the code is written to the chip in the key. I could be wrong, but i think it is. I'll go read my old emails from him.
I think your right Jug, its Code2 im thinking about as there is no red key.
Last edited:
each codebox is paired with its ecu, so keeping your original codebox means it wont be able to work with the new ecu.
the code is written to the key when you initially make the key (that is what timpsons are doing when they put it in that small machine with the digital diplay) but after that the key's code never changes.
the code is also written to the codebox so it can compare its own codes to the key code. for the red key this is done once during the manufacture of the codebox, but for blue keys this is done whenever you use the red key for the learning procedure. the codebox reads the blue key and stores its code. that is why you can use any blue key but only the original red key.
Last edited:
WOW
Bring back carburettors and points.
Didn't need codes or stuff for them.
I thought I new about cars how behind am I ??
Bring back carburettors and points.
Didn't need codes or stuff for them.
I thought I new about cars how behind am I ??
- Joined
- May 8, 2005
- Messages
- 9,053
- Points
- 1,538
