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[TheBoy]

Well they would if there's no signal getting through... Unless it's Bluetooth

Incorrect.  The switch just toggles between modes, it does not define which mode it is in.

And actually the previous owner was correct. On my TVP 3.2 manual estate, the ABS and TC hardly every activated unless you were driving like an absolute Khant. In the snow.

That would be programming within the unit, not cut wires.  Cutting wires cannot adjust it's sensitivity

And as an ex Accident Investigation Unit that left TVP with the ABS fitted with a switch to disable it.

That is most likely done, knowing one of the guys who "designs" the modifications for TVP, probably by interrupting the signals to one of the wheel sensors.  This will bring on the ABS light.

[Doctor Gollum]

Well they would if there's no signal getting through... Unless it's Bluetooth

Incorrect.  The switch just toggles between modes, it does not define which mode it is in.
Surely the setting will be whatever was selected when the wire was cut. And if the wire ends are touching(possibly via the radio cage), then it could keep ithe TC switched off 

And actually the previous owner was correct. On my TVP 3.2 manual estate, the ABS and TC hardly every activated unless you were driving like an absolute Khant. In the snow.

That would be programming within the unit, not cut wires.  Cutting wires cannot adjust it's sensitivity
That was based on 165k of experience with my estate, nothing to do with the wiring. I hardly ever saw the TC light come on or felt it activate.

And as an ex Accident Investigation Unit that left TVP with the ABS fitted with a switch to disable it.

That is most likely done, knowing one of the guys who "designs" the modifications for TVP, probably by interrupting the signals to one of the wheel sensors.  This will bring on the ABS light.

On my estate, the ABS light appeared just prior to its second taxi inspection. Turned out to be a damaged wire from previous electrical work before I purchased it. They had cut the loom in the dash and run an extension into the column. This extension had failed when the removed the retrofitted switch on the column.

[Enceladus]

Out of curiosity, why would the AIW officers want to permanently disable TC when there was a perfectly good switch available to disable it when required?

[Doctor Gollum]

Out of curiosity, why would the AIW officers want to permanently disable TC when there was a perfectly good switch available to disable it when required?

ABS. To enable a benchmark skid to be established at a scene as part of the investigation process.

TC being disabled by itself is indication of a fault. Not that a 3.2 with LSD needs TC...

[TheBoy]

Not that a 3.2 with LSD needs TC...

Probably not an auto unless its wet or icy, but the manuals are quite easy to make a mess off if you dump the clutch.

[Doctor Gollum]

Not that a 3.2 with LSD needs TC...

Probably not an auto unless its wet or icy, but the manuals are quite easy to make a mess off if you dump the clutch.

Not in my experience 

[TheBoy]

Not that a 3.2 with LSD needs TC...

Probably not an auto unless its wet or icy, but the manuals are quite easy to make a mess off if you dump the clutch.

Not in my experience 

You need to learn to try harder

[Doctor Gollum]

Not that a 3.2 with LSD needs TC...

Probably not an auto unless its wet or icy, but the manuals are quite easy to make a mess off if you dump the clutch.

Not in my experience 

You need to learn to try harder

That car wasn't exactly molycoddled

165k miles in 6 years, over two thirds of which as a taxi

[MikeV6]

Up Date

Had the car to a Vaux Specialist to have the Tech 2 plugged in

Outcome no communication to ABS ECU.

Replaced ABS ECU with a working one out of one I'm breaking and still the same 

What i do need to do is get the car back in the ramps and check ABS rings are ok which i should of probably done before going so far as changing ECU

[TheBoy]

No comms to ABS ECU is either an ABS ECU failure(usually the most likely cause) or the wiring between the digs port and said ECU, or potentially a wiring issue on the CAN between the ABS, Engine and transmission.

[TheBoy]

Was the ECU from the breaker the same hardware and same config?  (Config in this case is engine, ie 2.5/3.0 or a 2.6/3.2). Although I'd still expect it to be diagnosable, even if the config was wrong, as long as the h/w was the correct one.

[MikeV6]

Yes the ECU was from another 3.2 I'm breaking

[TheBoy]

Can you pop one of those ECUs in the breaker, connect a battery, and then see if thats diagnosable?  Assuming you have any equipment capable of diagnosis?

That would prove ECUs faulty or loom faulty.

Raking my brains what else it could be.  Fuses, but assumed you'd checked them (multiple fuses power the ABS).  I don't think its sensor/reluctor etc related, as ECU would still be diagnosable.

[MikeV6]

I'm thinking about sending my original ECU away to be tested its about £100 so ill do that see what the outcome is, wiring isn't my thing so if that's the case ill have to get somebody to look at it 

Still need to check the ABS rings that ill do this weekend if I get chance.



 

[cam.in.head]

as mentioned (worth checking if you like ) but no communication at all wont register any faults at all further down the line as it cant see them so the idea of just plugging it back into your other car makes more sense. doesnt need to be fitted as such,.if both ecu's work and communicate in the other car then theiroretically you  have the repair piece in front of you . ie possibly something in the wiring or connectors.