Thread: TD5 Driver Demand Faults

Col just got the same result on mine and it runs fine so I don't think that's it

Hmmmm, Interesting.

Thanks for that.

This might help
Disco 2 Hawkeye test results needed please - Land Rover Zone

I just popped the lid & can see no obvious damage, there are a few imperfections on the board but I think these are probably from manufacture.

I wish there was an obvious fault as I would then just go & buy a new ECU and be done with it.

It has been reflashed a few times so that may explain the error, but it still does not help fix the problem.

I know this sounds a bit weird but does it smell burnt it could be damaged on the underside.

I gave it a good sniff check mate & there was no obvious burnt smell.

I also gave thought to the first time it happened and it was on a tricky rock section, I had the compressor on which is a Warn VTC & it draws around 150amps on start up, when it happened the first time the compressor cut in at the same time as I thought I may need to use the front locker, at the time I didn't think much off it as I turned the ingnition off & it started fine with no faults, but thinking about it there might have been a voltage spike at that time which may have caused some problem, I am not sure if it is the case as I have used both my compressor & winch quite a bit over the years without any issues, but it may tie in.

Col
Just found this on another forum might be a wild goose chase

To whom it may concern.
I work at a landrover dealership as a tech and have recently came across a similar fault.
The vehicle idles and starts no problem, but just won't rev up.
Had the vehicle on T4 diagnostics and checked real time data for driver demand 1, 2 & 3. Voltages were moving up and down when pedal pressed. so appeared pedal potentiometer was working okay. Checked for the supply to pedal, even carried out continuety and resistance checks on wiring from pedal to ECU, All checked out okay.
Called landrover technical and was told to try ECU as we had already substituted pedal. Fitted ECU and prorammed injector codes and new security code, but still didn't work!!
Called technical again, this time i was told to splice new wiring from pedal to ecu, did this to all the wiring and fault was still there.

Pulling my hair out and still not getting anywhere, i started checking other wiring to the ECU. With vehicle running i was getting 13.82v at pin 30 on the ecu(green/white wire). This wire goes to the instrument cluster.
Took dash out (two screws) and dis-connected multi-plug( if sitting in drivers seat, the multiplug on the left) it has the green and white wire.

With the multi plug dis-connected, i started the vehicle and it will now rev up!!
There must have been a short in instument cluster causing a wrong signal to the ecu and giving a driver demand problem
A new one is on order and costs just over £100 + vat.

Hope this helps someone, as it took the best part of 2 days to find the fault.

Please note that i haven't quoted connector numbers etc from wiring diagrams as i'm writing this from memory at home.

Now thats an interesting find mate, thanks for the info, greatly appreciated.

That will be my next project in a couple of days when I get some time.

Will keep you updated.