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Author having ecu chipped and the abs light....
LoudandProud
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Registered: 12th Jan 01
Location: Stanway, Essex
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26th Apr 03 at 11:43   View User's Profile U2U Member Reply With Quote
since my car has been chipped my abs light stays on but brakes still work fine, got pulled up on the mot, neone else had this???
Sam
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Registered: 24th Dec 99
Location: West Midlands
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26th Apr 03 at 11:44   View User's Profile U2U Member Reply With Quote
Well you can either spend about £40 to get Vauxhall to tell you what the fault code is on Tech2, or you could use the paperclip method like I have, and do it yourself for free!
Kayleigh
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Registered: 6th Jun 02
Location: England
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26th Apr 03 at 11:45   View User's Profile U2U Member Reply With Quote
You say brakes work - have u tried the ABS?
Tim
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Registered: 21st Apr 00
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26th Apr 03 at 11:45   View Garage View User's Profile U2U Member Reply With Quote
Was it definitely programmed with the right software version because isn't the ABS controller built into the ECU? Just a guess but someone may have a proper answer.

[Edited on 26-04-2003 by Tim]
LoudandProud
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Registered: 12th Jan 01
Location: Stanway, Essex
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26th Apr 03 at 11:47   View User's Profile U2U Member Reply With Quote
yes i tried the abs was on a old road slammed all on the trie steering, was fine otherwise i would have gone sideways and ill have to phone the ocmpany n see what they say i guess
Sam
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Registered: 24th Dec 99
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26th Apr 03 at 11:47   View User's Profile U2U Member Reply With Quote
ABS has it's own ECU.
Sam
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Registered: 24th Dec 99
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26th Apr 03 at 11:48   View User's Profile U2U Member Reply With Quote
Why don't you just find out what the fault code is first?
LoudandProud
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Registered: 12th Jan 01
Location: Stanway, Essex
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26th Apr 03 at 11:52   View User's Profile U2U Member Reply With Quote
where is that located? there gonan see if they can find out what the fault code is but its pissed me right off cos it only done it after i had the chip done
Sam
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Registered: 24th Dec 99
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26th Apr 03 at 11:58   View User's Profile U2U Member Reply With Quote
You need to short out two pins on the dianostic plug by your fuse box, the two pins you need to short out depends on what info you want to read (ie. ECU, ABS, auto box, 4x4, etc.).

There is info on how to do this on the CavWeb and TopBuzz web sites.
Cybermonkey
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Registered: 22nd Sep 02
Location: Sydney, Australia
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26th Apr 03 at 11:59   View User's Profile U2U Member Reply With Quote
The ABS does not have its own ECU. It is mechanical mostly, with some electricals too. It is the large box on the left of the engine bay with green pipes running from it.

Dave
Sam
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26th Apr 03 at 12:23   View User's Profile U2U Member Reply With Quote
Yes it does have an ECU actually. The thing with the green pipes is called a hydraulic modulator.
Cybermonkey
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Registered: 22nd Sep 02
Location: Sydney, Australia
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26th Apr 03 at 12:27   View User's Profile U2U Member Reply With Quote
So is the ECU built into this modulator? I wouldnt know as i dont have ABS.
LoudandProud
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Registered: 12th Jan 01
Location: Stanway, Essex
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26th Apr 03 at 12:34   View User's Profile U2U Member Reply With Quote
it needs to have a ecu to rear the voltages on all 4 wheels and to work out when 1 or more is going a different speed to the others etc just dunno where it is tho
m4tt_c
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Registered: 24th Mar 02
Location: essex
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26th Apr 03 at 12:36   View User's Profile U2U Member Reply With Quote
the ecu does have its own ecu, think its in the passenger footwell.

i taken it out before but cant remember where it was doh
Sam
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26th Apr 03 at 12:36   View User's Profile U2U Member Reply With Quote
quote:
Originally posted by Cybermonkey24
So is the ECU built into this modulator? I wouldnt know as i dont have ABS.


So why are you saying that the ABS system has no ECU when you know nothing about the subject?

ABS basically works by automatic release/reapplication of the brakes, which is carried out several times a second by the "hydraulic modulator". The modulator is controlled by the ABS ECU, which basically reads signals from wheel sensors. They monitor the state of the wheels (ie. brakes locked up/unlocked).

The ABS ECU is inside a black box with "Bosch" written on it in the engine bay, the box being usually next to the modulator.
m4tt_c
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Registered: 24th Mar 02
Location: essex
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26th Apr 03 at 12:38   View User's Profile U2U Member Reply With Quote
there's 2 types of ecu sam, the bosch one and another one.

i found that out when i went looking for a new one.
Sam
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26th Apr 03 at 12:39   View User's Profile U2U Member Reply With Quote
quote:
Originally posted by m4tt_c
there's 2 types of ecu sam, the bosch one and another one.

i found that out when i went looking for a new one.


Lucas I think is the other one.
m4tt_c
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Registered: 24th Mar 02
Location: essex
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26th Apr 03 at 12:40   View User's Profile U2U Member Reply With Quote
probably i cant remember was to long ago, hell last week was to long ago to remember
Sam
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26th Apr 03 at 12:42   View User's Profile U2U Member Reply With Quote
quote:
Originally posted by m4tt_c
probably i cant remember was to long ago, hell last week was to long ago to remember




You sold your beast yet mate?
m4tt_c
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Registered: 24th Mar 02
Location: essex
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26th Apr 03 at 12:45   View User's Profile U2U Member Reply With Quote
nah, i'll get round to advertising it on autotrader one day lol
Sam
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26th Apr 03 at 12:47   View User's Profile U2U Member Reply With Quote
quote:
Originally posted by m4tt_c
nah, i'll get round to advertising it on autotrader one day lol



Out of interest, what happened to your 17s? I notice your wheels have shrunk by two inches?
m4tt_c
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Registered: 24th Mar 02
Location: essex
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26th Apr 03 at 12:47   View User's Profile U2U Member Reply With Quote
wanted the 15's for handling and speec.
Sam
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Registered: 24th Dec 99
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26th Apr 03 at 12:50   View User's Profile U2U Member Reply With Quote
quote:
Originally posted by m4tt_c
wanted the 15's for handling and speec.


Ahh I see. Don't suppose you want to sell me your engine do you?
Cybermonkey
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Registered: 22nd Sep 02
Location: Sydney, Australia
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26th Apr 03 at 13:00   View User's Profile U2U Member Reply With Quote
Not all ABS systems are controlled by an ECU. I know that on my dads old car, a Citroen Xantia, the ABS system was mechanical, and the modulator stopped the wheels from locking by knowing if the wheel was rotating and how much pressure is being applied through the master cylinder. So i do know something.
Sam
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Registered: 24th Dec 99
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26th Apr 03 at 13:09   View User's Profile U2U Member Reply With Quote
Fair enough.

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