rodent infestation

[kingqa]

Hi, still ongoing problems after supposed fix by replacing the main ECU. Can anyone advise on the following installment issue - (oh and remember the garage doing the repair blew the whole main ECU by catching its outer casing on the positive 12v battery terminal)

Since having the car back, the Cruise control still works incorrectly (buttons sequence and operation different, as previously mentioned), and a very noticable drop in fuel economy, which today i have checked as on average as being 10mpg drop!!!!! Both on a run and around time. 26mpg urban and 37mpg at a steady 65mph. Was getting 37 and 47 respectively before problems.

Just had the car connected up to a T4 by Kerridges in Needham Market and they say that they cannot alter any of the main ECU setting due to the main ECU not recognising the SRS module! And that they will need the car for longer to check further. (more cost!!).

My question is this, what on earth would the SRS module have to do with either cruise control function or the economy/performance of the engine??
(note- i do not have the SRS warning lite illuminated).

The cruise fault itself does warrant another hefty repair bill, it does work, just differently. But the massive drop in economy is far more worryiny/costly!

Please advise anyone:(

[BigRuss]

If T4 won't communicate with any ECU then it's almost impossible to re-configure anything, it will also stop the ability of doing the full diagnostic check, it will start to run the full check but will halt when reaching the faulty ECU and not continue futher.

Individual ECU's however can be interrogated for faults seperately (apart from any that are causing the communication problem), but it takes much longer to do it that way and at dealer rates that is going to be more expensive.

They should have been able to access the main EMS ECU to look for faults to see if they could discover what's going on with regard fuelling, maf etc.

Their explanation is vague to say the least, it may just be that other jobs were booked in and they didn't have time to look at it the long way until later.



Russ

[James.uk]

I think you need to take your car to someone who is familiar with them, most garages haven't a clue.. :shrug:

Shame BigRuss is so far away, but there must be someone nearer who can help.. :}
...

[rossocorsa]

the fuel economy might be a trip computer error rather than reality you'll need to do a brim to brim measure to be sure 26mpg urban doesn't sound far out for a diesel auto tbh and if you mean average consumption (rather than a spot reading) when cruising I think the 37 doesn't seem too far out if a fraction low whereas the 47 seems unattainably high for an auto

[kingqa]

i can assure you that i was getting 47mpg on long runs, and thats brim to brim. And never any less than 37mpg pottering around. Normally achieving between 520miles to 600miles before filling up.

i do have Synergy2 fitted, EGR bypass pipe, modified inlet ducting and a brand new engine (only done 3000miles so far). And don't go above 2000rpm.

No, these latest figures are exceptionally low for my car.

Since driving around after garage testing ECU's I now don't have the following working either - Rear windows, Front windows one touch operstion, Rear heated screen stays on, Rear Boot opening window not working, Auto central locking of all doors after setting off, and the front washer jets only jet on first pull of lever, they don't continue spraying.

Things just keep getting better........................not!

[kingqa]

Oh and Kerridges in Needham Market, Suffolk, were a Rover main dealership and still "specialise" in them.............!

Could all these errors be caused by the main ECU having 12vpositive going through its outer casing????? It certainly blew the whole board and components inside the main ECU box.

[rossocorsa]

And don't go above 2000rpm.


blimey how do you manage that???:bowdown:

[SKS Disco]

Oh and Kerridges in Needham Market, Suffolk, were a Rover main dealership and still "specialise" in them.............!

Could all these errors be caused by the main ECU having 12vpositive going through its outer casing????? It certainly blew the whole board and components inside the main ECU box.

It sounds like the casing short has messed up the ZCS codes.
all the functions you mention are controlled by these codes.
They are stored in the EWS module. ( You sure they said SRS and not EWS ? )

[kingqa]

Could point, will check with the garage today whether they did mean SRS or the EWS. Thanks for that.

And to answer how i achieve the fuel economy figures, as i said before i accelerate only upto 2000rpm, i don't go over 55mph when pottering around and found a great improvement in economy on a run if i kept at 70mph instead of 75mph (display speeds not real speed).

AND drive in cruise most of the time, but switch out of cruise each time the car is just about to increase revs to keep the speed maintained (going up hills) and take control of revs on the throttle pedal, then switching back into cruise once levelled out again.

Please remember my urban is not like city peak traffic urban!! We don't get alot of car queues here in Bury St Edmunds, ans seen as i don't work, i am not on the road much at peak times. I'm sure the urban figure would be alot lower for most people, but the long run figures should be achievable.

Anyhow, now off to the original garage to see how far they will accept paying for the Rover specialists to check out further these electronic faults! Wish me luck.

[kingqa]

It sounds like the casing short has messed up the ZCS codes.
all the functions you mention are controlled by these codes.
They are stored in the EWS module. ( You sure they said SRS and not EWS ? )
Where is this EWS module mounted please?

[kingqa]

blimey how do you manage that???:bowdown:
Envious of you owning the Lancia Volumex, i used to own just the Beta and loved it, but always wanted the supercharged version. I will just have to be happy with my GT6 convertible, running a TR6 2.5PI engine!

[SKS Disco]

Where is this EWS module mounted please?

EWS module.

This is the immobiliser / burglar alarm control unit.
EWS stands for “Electronishe Wegfahsperre” which is German for “Electronic Drive Away Protection”

Hence EWS. “Electronishe WegfahSperre”

It is located in the drivers footwell behind the lower “A” post trim finisher.

These are vehicle specific and must be ordered to VIN. They are not interchangeable.

[BigRuss]

Sorry should have read the previous thread first, I had forgotton I'd previously replied.

Trouble is the car has been fitted with foriegn ecu's, so Kerridge's are on a hiding to nothing unless the original and/or new parts are refitted.

http://www.the75andztclub.co.uk/forum/showpost.php?p=647554&postcount=12

T4 won't re-configure the foriegn components (EMS and EWS) because they're VIN locked and the other bits probably won't work because the coding is all messed up.

[rossocorsa]

Envious of you owning the Lancia Volumex, i used to own just the Beta and loved it, but always wanted the supercharged version. I will just have to be happy with my GT6 convertible, running a TR6 2.5PI engine!

not too much to be envious about it hasn't run for about 8 years, my friend has one that's mint and original though along with a very mint rover 825 sterling makes my cars look embarassing

[kingqa]

Sorry should have read the previous thread first, I had forgotton I'd previously replied.

Trouble is the car has been fitted with foriegn ecu's, so Kerridge's are on a hiding to nothing unless the original and/or new parts are refitted.

http://www.the75andztclub.co.uk/forum/showpost.php?p=647554&postcount=12

T4 won't re-configure the foriegn components (EMS and EWS) because they're VIN locked and the other bits probably won't work because the coding is all messed up.

These two modules haven't been changed, they are the original units. The ECU, BCU and a security module (mounted behind trim between front and rear drivers side doors) were the units changed as was the ignition barrel ring.

The suggection from Kerridges is that the k-bus circuit has been damaged/corrupted. It is back in on Monday for further evaluation. Hopefully fixed........but not holding my breath, luck certainly has not been with me with this car!! Not the cars fault that a mouse decided to get cosy inside it!!!

[tsautos]

I've no idea what your original problem was but it's sound to me these clowns have not got a clue.

[kingqa]

Well, my car has now been with Kerridges for 2 days now and all i managed to get out of them is that they are still trying to find out why their equipment keeps telling them that my SRS module/wiring to it, is corrupted and therefore preventing them from accessing any reprogrammable capabilities on any of the Electronic modules!!

What is adding to my stress is that i am disabled and live out in the 'sticks' and have no other way of getting around. So i have been stuck in my house for 2 now at least 3 days, and it just doesn't make sense to me what should take so long to find the actual fault, (i know they have spent at least 3hrs on it over the 2 days) never mind the fact that they basically called me a liar when i told them of the faults i now had since they had connected their kit to my car, stating that none of those faults could have been caused by what they did, yet the reality is that it did!!

However much as i enjoy driving my Rover 75 i think i will be selling it when i get it back. I cannot handle the stress anymore of relying on so called specialists to diagnose elctronic faults on my car. I have been able to do my own mechanics on cars ever since i was 15yrs old until my disability. But even so, i still understood and could guide mechanics as to the best way to fix my cars when i have been unable to do it myself physically. Now, even if they have the right equipment they don't appear to have the knowledge to understand what the results are telling them, rather they just try different things until they hopefully run into the fault!! Damn annoying!!!!!!!!!!!:confused::confused::confused:: confused::(

[rossocorsa]

unfortunately if you get these issues this will happen with any modern car they are all complex and most modern mechanics have a replace not repair mentality when they are faced with a conundrum they can't cope

[FrenchMike]

Hi,

you are not alone;last year a couple of mice decided to build their nest
just under the ECU of my 75.

As a wire annoyed them,they cut it (may be ate) 2 inches long !
This was the low presssure sensor supply.
And EP warning on the dash produced !

7424

Look for a possible nest and watch the wires around !
Good luck

Mike

[kingqa]

Picked the car up last Friday from Kerridges and now everything working again. They finally managed to get into the main ECU module to reset everything.

So after a whole month my car is back to its great, comfortable drive.

Thanks to all for their comments.:D;):}:p:

[Alan.F]

Picked the car up last Friday from Kerridges and now everything working again. They finally managed to get into the main ECU module to reset everything.

So after a whole month my car is back to its great, comfortable drive.

Thanks to all for their comments.:D;):}:p:


Great news really pleased you have it sorted :}