ECC fault - all lights on

[Rusty1234]

Hi there - I need some help if you can.

2007/10 XC70 with nearly 100k on the odometer. While out driving a couple of days ago, I noticed that all of the Electronic Climate Control (ECC) lights suddenly came on and remained on.

The lights remain on after the engine is switched off, after the key is removed and after the doors are locked. They go out after 5-10 minutes. [EDIT - this no longer occurs after the lock/unlock reset, see below].

While the car is running, the lights will all remain ON. The air-conditioning control lights remain on although all the buttons seem to cause the correct functions to occur.

All of the lights can be switched OFF by pressing the DEFROSTER WINDSCREEN AND SIDE WINDOWS button twice, or the MAN/AUT button once. Although the lights are off, the action of the ECC is to operate in AUTO mode.

The lights can be switched ON by pressing MAN/AUT twice, or any other button except the AUTO. The MAN/AUT button can also be used to switch off all the lights.

Once the lights have been turned off, the fan speed can be varied and air directed to high/middle/floor using the appropriate buttons.

The responses are the same regardless of whether the key is in the II position, or the car is running.

I tried to lock and unlock the doors five (5) times as suggested elsewhere on the forum, but no improvement. [EDIT] Actually, now the lights go out when the key is removed.

I tried disconnecting the battery, touching the + and - terminals together for 30 seconds, and re-connecting but no change. Note that the car seat memory remained intact. Perhaps there is a different reset method for 2007 vehicles??

In short, it's definitely some sort of control logic fault which I can't seem to reset. The climate control SEEMS to work OK but it's just disconcerting to have all the lights on like a Christmas tree.

Thanks in advance for any suggestions!

[JRL]

It either needs to be re-calibrated or replaced if calibration makes no change

[Rusty1234]

Thanks.

So my understanding is that "recalibration" means a trip to the dealer, unless you can point me to instructions on how to do it?

R.

[Antherzoll]

Thanks.

So my understanding is that "recalibration" means a trip to the dealer, unless you can point me to instructions on how to do it?

R.

What OS are you using and how handy are you around a computer?

[Rusty1234]

Windows 8.1, Mac OSX and (at a pinch) Linux. Computer-wise, I feel I'm fairly "handy" but I don't have the Volvo diagnostic software. How easy/costly is that path?

[Antherzoll]

Windows 8.1, Mac OSX and (at a pinch) Linux. Computer-wise, I feel I'm fairly "handy" but I don't have the Volvo diagnostic software. How easy/costly is that path?

You can download the software through a torrent. The DiCE unit will cost anywhere from $80-$125USD, comes with the software (VIDA), and it's totally worth it once you realize what it can do. Search VIDA/DiCE

[billr99]

You can download the software through a torrent. The DiCE unit will cost anywhere from $80-$125USD, comes with the software (VIDA), and it's totally worth it once you realize what it can do. Search VIDA/DiCE

100% agree. Its the best money anyone can ever spend on their Volvo IMHO.

Cheers,

Bill

[reolonaapp]

Folks,

I have a doubt.. in case he needs to replace the module.. the new one needs to be programmed at the car??

Reason I ask is I owned a BMW which has to have the modules programmed with its VIN, otherwise it doesn't work.

If that's the case for VOLVO as well, is VIDA DICE able to do that programming?? If not, is there a way to do that outside of the dealer??

Thanks

[gwee]

2014A Vida softwre:http://down.diyobd2.fr/vida-2014a-torrent.zip