S

Splitpin

Guest
I have got a series2A and i have had trouble with the fuel gauge or sender
since i've had it.the gauge would only read either full or empty or when
the
fuel level got low it would bounce up and down.
The landy has been switched to negative earth.

any how i changed the sender last night but nothing changed.
Could it be the wires on the fuel gauge are wrong way round.

Thanks

Dave
63 series 2A
90 Toy Landcruiser


 
It's a short in the electrical circuit or poor/non-existant earth. Use
a meter to check.


Splitpin wrote:
> I have got a series2A and i have had trouble with the fuel gauge or sender
> since i've had it.the gauge would only read either full or empty or when
> the
> fuel level got low it would bounce up and down.
> The landy has been switched to negative earth.
>
> any how i changed the sender last night but nothing changed.
> Could it be the wires on the fuel gauge are wrong way round.
>
> Thanks
>
> Dave
> 63 series 2A
> 90 Toy Landcruiser


 
i may be wrong here but if it was the wires the wrong way round i think yer gauge would just read in reverse. i'm pretty certain you have a voltage regulator behind the dash which if faulty would give you strange readings on the gauge.
if memory serve correct its a little silver box with two wire on it. i 'd check it by putting a multi meter (on volts d.c) over it and checkin the output is steady and not jumping up and down with engine revs.
 

"Jerry" <jerry_glenwright@hotmail.com> wrote in message
news:1160640244.784261.242800@b28g2000cwb.googlegroups.com...
> It's a short in the electrical circuit or poor/non-existant earth. Use
> a meter to check.
>
>
> Splitpin wrote:
> > I have got a series2A and i have had trouble with the fuel gauge or

sender
> > since i've had it.the gauge would only read either full or empty or

when
> > the
> > fuel level got low it would bounce up and down.
> > The landy has been switched to negative earth.
> >
> > any how i changed the sender last night but nothing changed.


Do you mean 'new' when you say you have changed the sender unit or changed
it for another secondhand knackered one?

> > Could it be the wires on the fuel gauge are wrong way round.


I wouldn't have thought so but going off the behaviour of the gauge and if
it's a diesel sender unit it sounds like you've got the gauge connected to
the low fuel warning terminal on the unit, are there two terminals on there?

Martin

> >
> > Thanks
> >
> > Dave
> > 63 series 2A
> > 90 Toy Landcruiser

>



 

Could it be a missing or faulty voltage regulator?
Little thing about an 1"x1/4"x1/4" looks a bit like a ceramic resistor.
Usually (on a series 3) attached to the back of the instrument panel.

Nigel
--
nigel@leginDOTorg

and a couple of SJs for spares

"Splitpin" <brennan.series3@virgin.net> wrote in message
news:xbWdnSxSC6l5QrDYnZ2dnUVZ8qSdnZ2d@bt.com...
>I have got a series2A and i have had trouble with the fuel gauge or sender
> since i've had it.the gauge would only read either full or empty or when
> the
> fuel level got low it would bounce up and down.
> The landy has been switched to negative earth.
>
> any how i changed the sender last night but nothing changed.
> Could it be the wires on the fuel gauge are wrong way round.
>
> Thanks
>
> Dave
> 63 series 2A
> 90 Toy Landcruiser
>



 
I will check this out over the weekend.


"Nigel" <nigelAT@leginDOT.org> wrote in message
news:452ea2b7$0$8434$9a6e19ea@unlimited.newshosting.com...
>
> Could it be a missing or faulty voltage regulator?
> Little thing about an 1"x1/4"x1/4" looks a bit like a ceramic resistor.
> Usually (on a series 3) attached to the back of the instrument panel.
>
> Nigel
> --
> nigel@leginDOTorg
>
> and a couple of SJs for spares
>
> "Splitpin" <brennan.series3@virgin.net> wrote in message
> news:xbWdnSxSC6l5QrDYnZ2dnUVZ8qSdnZ2d@bt.com...
>>I have got a series2A and i have had trouble with the fuel gauge or sender
>> since i've had it.the gauge would only read either full or empty or when
>> the
>> fuel level got low it would bounce up and down.
>> The landy has been switched to negative earth.
>>
>> any how i changed the sender last night but nothing changed.
>> Could it be the wires on the fuel gauge are wrong way round.
>>
>> Thanks
>>
>> Dave
>> 63 series 2A
>> 90 Toy Landcruiser
>>

>
>



 
New one

"Oily" <martinhill100@nospambtconnect.com> wrote in message
news:O4udnYZ4E7IAA7PYRVnyuA@bt.com...
>
> "Jerry" <jerry_glenwright@hotmail.com> wrote in message
> news:1160640244.784261.242800@b28g2000cwb.googlegroups.com...
>> It's a short in the electrical circuit or poor/non-existant earth. Use
>> a meter to check.
>>
>>
>> Splitpin wrote:
>> > I have got a series2A and i have had trouble with the fuel gauge or

> sender
>> > since i've had it.the gauge would only read either full or empty or

> when
>> > the
>> > fuel level got low it would bounce up and down.
>> > The landy has been switched to negative earth.
>> >
>> > any how i changed the sender last night but nothing changed.

>
> Do you mean 'new' when you say you have changed the sender unit or changed
> it for another secondhand knackered one?
>
>> > Could it be the wires on the fuel gauge are wrong way round.

>
> I wouldn't have thought so but going off the behaviour of the gauge and if
> it's a diesel sender unit it sounds like you've got the gauge connected to
> the low fuel warning terminal on the unit, are there two terminals on
> there?
>
> Martin
>
>> >
>> > Thanks
>> >
>> > Dave
>> > 63 series 2A
>> > 90 Toy Landcruiser

>>

>
>



 
On Fri, 13 Oct 2006 10:41:10 +0100, "Splitpin"
<brennan.series3@virgin.net> wrote:

>I will check this out over the weekend.


my 2a has no voltage reg. it just means that once you start the engine
and the alternator starts doing its business both the gauges move up
about 1/4 of the scale. They dont fluctuate a lot just read high.

It means that my tank is really empty it still says about 1.4 full
which has only caught me out once!


 

"Splitpin" <brennan.series3@virgin.net> wrote in message
news:UredncKexJ0iwLLYnZ2dnUVZ8qednZ2d@bt.com...
> New one
>
>

And the other question?...... Does it have two terminals on the tank
sender unit?..

Martin


 
Splitpin wrote:

> I have got a series2A and i have had trouble with the fuel gauge or sender
> since i've had it.the gauge would only read either full or empty or when
> the
> fuel level got low it would bounce up and down.
> The landy has been switched to negative earth.
>
> any how i changed the sender last night but nothing changed.
> Could it be the wires on the fuel gauge are wrong way round.
>
> Thanks
>
> Dave
> 63 series 2A
> 90 Toy Landcruiser


Your problem could arise from the fact that there are two fuel guages and
senders fitted to Series 2a Landrovers. The change was after vehicle suffix
C about 1967 from 90519841 to 555835 with senders 519838 and 555844 (these
are just the basic petrol ones - different for diesel and 109 station
wagon). If you mix the either gauge with the wrong sender you will get the
sort of result you are seeing. If yours is a 63 one, it should have the
earlier type - but! of course it is possible to change the system from that
originally fitted to the later one or vice versa, but both gauge and sender
must be changed, and the later one also needs a small voltage regulator, in
the 2a usually attached to the bulkhead behind the instrument cluster (and
this attachment is also the earth point for the regulator, and if it is not
a good earth, this will also cause strange results). In the Series 3 it is
on the back of the speedo.
JD
 

"JD" <jjd@spamlesstpgi.com.au> wrote in message
news:45335476@dnews.tpgi.com.au...
> Splitpin wrote:
>
> > I have got a series2A and i have had trouble with the fuel gauge or

sender
> > since i've had it.the gauge would only read either full or empty or

when
> > the
> > fuel level got low it would bounce up and down.
> > The landy has been switched to negative earth.
> >
> > any how i changed the sender last night but nothing changed.
> > Could it be the wires on the fuel gauge are wrong way round.
> >
> > Thanks
> >
> > Dave
> > 63 series 2A
> > 90 Toy Landcruiser

>
> Your problem could arise from the fact that there are two fuel guages and
> senders fitted to Series 2a Landrovers. The change was after vehicle

suffix
> C about 1967 from 90519841 to 555835 with senders 519838 and 555844 (these
> are just the basic petrol ones - different for diesel and 109 station
> wagon). If you mix the either gauge with the wrong sender you will get the
> sort of result you are seeing.


I disagree, if you mix the wrong types they will just read wrong, not
"bounce up and down" as he says.

If yours is a 63 one, it should have the
> earlier type -


It *is* the earlier type, the later gauge moves slowly and also the vehicle
has been changed from positive earth which also suggests an early model.

but! of course it is possible to change the system from that
> originally fitted to the later one or vice versa, but both gauge and

sender
> must be changed, and the later one also needs a small voltage regulator,

in
> the 2a usually attached to the bulkhead behind the instrument cluster (and
> this attachment is also the earth point for the regulator, and if it is

not
> a good earth, this will also cause strange results). In the Series 3 it is
> on the back of the speedo.
> JD


Absolutely, they must be paired.

Getting back to his problem he says it reads either full or empty (but
doesn't say whether empty when actually empty or vice versa) and when the
level is low it "bounces up and down", which suggests to me that he hasn't
got the later tank unit (if connected correctly) which would read empty when
full and vice versa but has got a diesel tank unit with the gauge connected
to the 'low fuel' terminal. Unless there's a dodgy connection (reads full)
or shorting wire to the tank unit (reads empty) but those would be faulty
for most of the time, not just when the "fuel level got low".

From his description of his problem I think it is rather pointless to pursue
it further as he does not answer questions the answer to which would help
with a diagnosis.

Martin


 
Oily wrote:

> From his description of his problem I think it is rather pointless to pursue
> it further as he does not answer questions the answer to which would help
> with a diagnosis.


As usual getting a decent description of the problem is harder than
actually solving the problem. This has reminded me why I'm off the
tools now.


--
EMB
 

"EMB" <embtwo@gmail.com> wrote in message
news:eh0r60$qvf$1@lust.ihug.co.nz...
> Oily wrote:
>
> > From his description of his problem I think it is rather pointless to

pursue
> > it further as he does not answer questions the answer to which would

help
> > with a diagnosis.

>
> As usual getting a decent description of the problem is harder than
> actually solving the problem. This has reminded me why I'm off the
> tools now.
>

Same here, too old to be arsed with it. :)

Martin


 
On or around Mon, 16 Oct 2006 22:11:15 +0100, "Oily"
<martinhill100@nospambtconnect.com> enlightened us thusly:

>
>"EMB" <embtwo@gmail.com> wrote in message
>news:eh0r60$qvf$1@lust.ihug.co.nz...
>> Oily wrote:
>>
>> > From his description of his problem I think it is rather pointless to

>pursue
>> > it further as he does not answer questions the answer to which would

>help
>> > with a diagnosis.

>>
>> As usual getting a decent description of the problem is harder than
>> actually solving the problem. This has reminded me why I'm off the
>> tools now.
>>

> Same here, too old to be arsed with it. :)


's not too bad on older motors - it's the modern stuff with all the
electronics that bothers me - take the tranny, for example, with its Lucas
Epic engine management. I daresay there's a diagnostic connector on it
somewhere which you can plug in and it'll report what's wrong with it; but
it's not going to be (easily) diagnosable with ordinary equipment.

I'm not against all the electronic systems, provided they're built with an
eye to durability (and to be fair, the stuff on the tranny has nice sealed
plugs which don't readily admit water to cause corrosion, for example) but
it'd be a lot more useful in the real world which doesn't include
dealerships and lots of money if the system had the ability to indicate its
own faults.

This need only be a fault code which can be looked up provided the look-up
list is readily available - but it needs to be comprehensive: it's no use
having a fault code that says "engine management system faulty", it's got to
say "crank speed sensor faulty" or "inlet air temperature sensor
disconnected" or suchlike. I don't see why the things can't have this
ability - the system has to be able to communicate with all its sensors and
switches and actuators and so on, so it must know which one's not responding
- all it needs is the ability to report accurately.
--
Austin Shackles. www.ddol-las.net my opinions are just that
Appearances: You don't really need make-up. Celebrate your authentic
face by frightening people in the street.
from the Little Book of Complete B***ocks by Alistair Beaton.
 
Austin Shackles wrote:

> I'm not against all the electronic systems, provided they're built with an
> eye to durability (and to be fair, the stuff on the tranny has nice sealed
> plugs which don't readily admit water to cause corrosion, for example) but
> it'd be a lot more useful in the real world which doesn't include
> dealerships and lots of money if the system had the ability to indicate its
> own faults.
>
> This need only be a fault code which can be looked up provided the look-up
> list is readily available - but it needs to be comprehensive: it's no use
> having a fault code that says "engine management system faulty", it's got to
> say "crank speed sensor faulty" or "inlet air temperature sensor
> disconnected" or suchlike. I don't see why the things can't have this
> ability - the system has to be able to communicate with all its sensors and
> switches and actuators and so on, so it must know which one's not responding
> - all it needs is the ability to report accurately.


Like the average Toyota - link 2 terminals in the connector under the
bonnet (a bent paperclip suffices), turn on the key, and count the
flashes of the 'Check Engine' light on the dash. It gives enough detail
to track most problems down, and resetting the ECU memory is as simple
as pulling the EFI fuse for 5 mins. Maybe LR can learn a bit from this.
 
Austin Shackles wrote:

> On or around Mon, 16 Oct 2006 22:11:15 +0100, "Oily"
> <martinhill100@nospambtconnect.com> enlightened us thusly:
>
>>
>>"EMB" <embtwo@gmail.com> wrote in message
>>news:eh0r60$qvf$1@lust.ihug.co.nz...
>>> Oily wrote:
>>>
>>> > From his description of his problem I think it is rather pointless to

>>pursue
>>> > it further as he does not answer questions the answer to which would

>>help
>>> > with a diagnosis.
>>>
>>> As usual getting a decent description of the problem is harder than
>>> actually solving the problem. This has reminded me why I'm off the
>>> tools now.
>>>

>> Same here, too old to be arsed with it. :)

>
> 's not too bad on older motors - it's the modern stuff with all the
> electronics that bothers me - take the tranny, for example, with its Lucas
> Epic engine management. I daresay there's a diagnostic connector on it
> somewhere which you can plug in and it'll report what's wrong with it; but
> it's not going to be (easily) diagnosable with ordinary equipment.
>
> I'm not against all the electronic systems, provided they're built with an
> eye to durability (and to be fair, the stuff on the tranny has nice sealed
> plugs which don't readily admit water to cause corrosion, for example) but
> it'd be a lot more useful in the real world which doesn't include
> dealerships and lots of money if the system had the ability to indicate
> its own faults.
>
> This need only be a fault code which can be looked up provided the look-up
> list is readily available - but it needs to be comprehensive: it's no use
> having a fault code that says "engine management system faulty", it's got
> to say "crank speed sensor faulty" or "inlet air temperature sensor
> disconnected" or suchlike. I don't see why the things can't have this
> ability - the system has to be able to communicate with all its sensors
> and switches and actuators and so on, so it must know which one's not
> responding - all it needs is the ability to report accurately.


There is a case being talked about recently in Australia where a Defender
under warranty was shipped about 2000km to the nearest dealer - it took a
fortnight to find a carrier who would move it (plus trailer). The problem?
faulty throttle potentiometer. What this case has done for the family in
question and for Landrover credibility can only be imagined. No local
mechanic was prepared to even look at it as none had the required software.
JD

 

"JD" <jjd@spamlesstpgi.com.au> wrote in message
news:4534a1b4@dnews.tpgi.com.au...
> Austin Shackles wrote:
>
> > On or around Mon, 16 Oct 2006 22:11:15 +0100, "Oily"
> > <martinhill100@nospambtconnect.com> enlightened us thusly:
> >
> >>
> >>"EMB" <embtwo@gmail.com> wrote in message
> >>news:eh0r60$qvf$1@lust.ihug.co.nz...
> >>> Oily wrote:
> >>>
> >>> > From his description of his problem I think it is rather pointless

to
> >>pursue
> >>> > it further as he does not answer questions the answer to which would
> >>help
> >>> > with a diagnosis.
> >>>
> >>> As usual getting a decent description of the problem is harder than
> >>> actually solving the problem. This has reminded me why I'm off the
> >>> tools now.
> >>>
> >> Same here, too old to be arsed with it. :)

> >
> > 's not too bad on older motors - it's the modern stuff with all the
> > electronics that bothers me - take the tranny, for example, with its

Lucas
> > Epic engine management. I daresay there's a diagnostic connector on it
> > somewhere which you can plug in and it'll report what's wrong with it;

but
> > it's not going to be (easily) diagnosable with ordinary equipment.
> >
> > I'm not against all the electronic systems, provided they're built with

an
> > eye to durability (and to be fair, the stuff on the tranny has nice

sealed
> > plugs which don't readily admit water to cause corrosion, for example)

but
> > it'd be a lot more useful in the real world which doesn't include
> > dealerships and lots of money if the system had the ability to indicate
> > its own faults.
> >
> > This need only be a fault code which can be looked up provided the

look-up
> > list is readily available - but it needs to be comprehensive: it's no

use
> > having a fault code that says "engine management system faulty", it's

got
> > to say "crank speed sensor faulty" or "inlet air temperature sensor
> > disconnected" or suchlike. I don't see why the things can't have this
> > ability - the system has to be able to communicate with all its sensors
> > and switches and actuators and so on, so it must know which one's not
> > responding - all it needs is the ability to report accurately.

>
> There is a case being talked about recently in Australia where a Defender
> under warranty was shipped about 2000km to the nearest dealer - it took a
> fortnight to find a carrier who would move it (plus trailer). The problem?
> faulty throttle potentiometer. What this case has done for the family in
> question and for Landrover credibility can only be imagined. No local
> mechanic was prepared to even look at it as none had the required

software.
> JD
>

A case of vehicle complexity costing them sales because they are too tight
fisted to supply local dealers with essential free software, in other words,
no backup. And don't get me wrong, I wouldn't have a car, I only use
Landrover products.

Martin


 
Oily wrote:

>
> "JD" <jjd@spamlesstpgi.com.au> wrote in message
> news:4534a1b4@dnews.tpgi.com.au...
>> Austin Shackles wrote:
>>
>> > On or around Mon, 16 Oct 2006 22:11:15 +0100, "Oily"
>> > <martinhill100@nospambtconnect.com> enlightened us thusly:
>> >
>> >>
>> >>"EMB" <embtwo@gmail.com> wrote in message
>> >>news:eh0r60$qvf$1@lust.ihug.co.nz...
>> >>> Oily wrote:
>> >>>
>> >>> > From his description of his problem I think it is rather pointless

> to
>> >>pursue
>> >>> > it further as he does not answer questions the answer to which
>> >>> > would
>> >>help
>> >>> > with a diagnosis.
>> >>>
>> >>> As usual getting a decent description of the problem is harder than
>> >>> actually solving the problem. This has reminded me why I'm off the
>> >>> tools now.
>> >>>
>> >> Same here, too old to be arsed with it. :)
>> >
>> > 's not too bad on older motors - it's the modern stuff with all the
>> > electronics that bothers me - take the tranny, for example, with its

> Lucas
>> > Epic engine management. I daresay there's a diagnostic connector on it
>> > somewhere which you can plug in and it'll report what's wrong with it;

> but
>> > it's not going to be (easily) diagnosable with ordinary equipment.
>> >
>> > I'm not against all the electronic systems, provided they're built with

> an
>> > eye to durability (and to be fair, the stuff on the tranny has nice

> sealed
>> > plugs which don't readily admit water to cause corrosion, for example)

> but
>> > it'd be a lot more useful in the real world which doesn't include
>> > dealerships and lots of money if the system had the ability to indicate
>> > its own faults.
>> >
>> > This need only be a fault code which can be looked up provided the

> look-up
>> > list is readily available - but it needs to be comprehensive: it's no

> use
>> > having a fault code that says "engine management system faulty", it's

> got
>> > to say "crank speed sensor faulty" or "inlet air temperature sensor
>> > disconnected" or suchlike. I don't see why the things can't have this
>> > ability - the system has to be able to communicate with all its sensors
>> > and switches and actuators and so on, so it must know which one's not
>> > responding - all it needs is the ability to report accurately.

>>
>> There is a case being talked about recently in Australia where a Defender
>> under warranty was shipped about 2000km to the nearest dealer - it took a
>> fortnight to find a carrier who would move it (plus trailer). The
>> problem? faulty throttle potentiometer. What this case has done for the
>> family in question and for Landrover credibility can only be imagined. No
>> local mechanic was prepared to even look at it as none had the required

> software.
>> JD
>>

> A case of vehicle complexity costing them sales because they are too
> tight
> fisted to supply local dealers with essential free software, in other
> words, no backup. And don't get me wrong, I wouldn't have a car, I only
> use Landrover products.
>
> Martin


Not quite that simple - no local dealer, as Landrover in Australia has been
cutting back dealerships to major cities - and in Australia these are a
long way apart in places. (Although there was probably never a Landrover
dealer within 500km of this location) But they are selling vehicles that
can only be fixed by a dealer and trying to get round this by shipping
vehicles back to the dealer, overlooking the fact that this is often easier
said than done. In this case they would have done better to have flown in a
mechanic with a test book - and waited the 24hrs for the next plane to get
the part in, and the owner would have been on his way in a couple of days
and it would have been cheaper for Landrover - but of course that is being
wise after the event. Just as likely that the breakdown would have required
a part not available in the country, a fortnight to get it from the UK -
like the official position on a rear window for my 110 recently, which I
found while looking for a S/H one at the nearest (non-specialist) wrecker,
although heaven knows why he had a new one. But according to the official
channels, two weeks ex-UK.
JD
 
On or around Tue, 17 Oct 2006 11:23:05 +0100, "Oily"
<martinhill100@nospambtconnect.com> enlightened us thusly:

> A case of vehicle complexity costing them sales because they are too tight
>fisted to supply local dealers with essential free software, in other words,
>no backup. And don't get me wrong, I wouldn't have a car, I only use
>Landrover products.


But it also highlights quite clearly that the diagnostics need to be on the
vehicle. It's no use selling things as being capable of going anywhere if a
simple problem immobilises it and can't be identified. Like EMB says about
the toyota, only more so - it should be able to give a specific fault code
that says "throttle pot out of spec" - the ECU *MUST* "know" this to be able
to flag up a fault in the first place, how difficult is it, these days, to
have it put it up on a simple little LCD display on the dash, either as a
code (but in that case the list of fault codes MUST be freely available) or
a simple message. CF the thing in another fred about the LPG vauxhall,
which put a message on the display saying "stop the car and evacuate the
cabin" because of a fault leading to an LPG tank venting. It can be done
and it bloody should be done, and not to do it makes a mockery of the
go-anywhere image.

ISTR that a disco 3 on test in Africa had to be shipped back to europe for
similar reasons - no testbook avilable.

FFS, LR, build the diagnostics into the vehicle and make it a selling point:
"In the unlikely event of a system failure, the on-board diagnostics will
identify the failed component", for example. But that means that
first-world dealers can't then charge 250 bucks a time to "diagnose" it and
repair it, of course...

--
Austin Shackles. www.ddol-las.net my opinions are just that
Beyond the horizon of the place we lived when we were young / In a world
of magnets and miracles / Our thoughts strayed constantly and without
boundary / The ringing of the Division bell had begun. Pink Floyd (1994)
 
In message <hjn9j2503p1f7corp4b7k10ct1g2jq9uq3@4ax.com>
Austin Shackles <austinNOSPAM@ddol-las.net> wrote:

> On or around Tue, 17 Oct 2006 11:23:05 +0100, "Oily"
> <martinhill100@nospambtconnect.com> enlightened us thusly:
>
> > A case of vehicle complexity costing them sales because they are too tight
> >fisted to supply local dealers with essential free software, in other words,
> >no backup. And don't get me wrong, I wouldn't have a car, I only use
> >Landrover products.

>
> But it also highlights quite clearly that the diagnostics need to be on the
> vehicle. It's no use selling things as being capable of going anywhere if a
> simple problem immobilises it and can't be identified. Like EMB says about
> the toyota, only more so - it should be able to give a specific fault code
> that says "throttle pot out of spec" - the ECU *MUST* "know" this to be able
> to flag up a fault in the first place, how difficult is it, these days, to
> have it put it up on a simple little LCD display on the dash, either as a
> code (but in that case the list of fault codes MUST be freely available) or
> a simple message. CF the thing in another fred about the LPG vauxhall,
> which put a message on the display saying "stop the car and evacuate the
> cabin" because of a fault leading to an LPG tank venting. It can be done
> and it bloody should be done, and not to do it makes a mockery of the
> go-anywhere image.
>
> ISTR that a disco 3 on test in Africa had to be shipped back to europe for
> similar reasons - no testbook avilable.
>
> FFS, LR, build the diagnostics into the vehicle and make it a selling point:
> "In the unlikely event of a system failure, the on-board diagnostics will
> identify the failed component", for example. But that means that
> first-world dealers can't then charge 250 bucks a time to "diagnose" it and
> repair it, of course...
>


Unfortunately it's not that simple (Ex-R75 disgnostics Engineer hat on).
The ECU only holds data, and that has to be converted into
information which is readable/understandable by users (particularly
if its on the vehicle, as owners will play....). The major factor
thought, is that the vast majority of possible faults aren't specific
to the ECU. It could, for example, detect an injector fault - but
is it an output trasistor failure (which the ECU could usually
tell, on Lucas ones anyway), the injector (or part thereof), or
a wiring fault, or duff fuel, or lack of fuel etc etc. ECU fault
codes are only the very start of diagnostics, and to make sense
of a fault code a multimeter, oscillascope and god knows what
else is possibly required.
You only have to look at the number of faults that auto boxes
on 38a Range Rovers trigger that are nothing to do with it to
see how complex things can get. And of course the 38a Front
ABS Sensor fault which gets blamed sqaurely on the traction control
......

Richard
--
www.beamends-lrspares.co.uk sales@beamends-lrspares.co.uk
www.radioparadise.com - Good Music, No Vine
Lib Dems - Townies keeping comedy alive
 

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