Warning lights on after under body wash. Scan tool help

[Richardli]

Hi all, just got back from Fraser Island and carried out an under body pressure wash, now I have a permanent transmission fault light coming up, also warning lights for hill decent, apply handbrake warning light- even though it is working, stability lights, special programs disabled , suspension is in low mode. Last night the hazard lights and alarm we're going off for no reason. I had to disconnect battery over night to stop it. Today hazard light and alarm problem has resolved by itself but all other problems still evident. , I've been through all the plugs that I can find under the vehicle /chassis area. No water found in plugs.

Just wondering if anyone else had struck the same problem and advice on a scan tool to purchase. I have a basic launch scan tool but doesn't read any codes on the Disco 3 2.7 tdv6 I want a full function scan tool.

Assistance would be much appreciated

[BMKal]

Good chance that it will all come good when everything "dries out". If not, try a "hard re-set".

I had a slightly similar problem with mine a couple of days ago after washing under the bonnet (for the first time). When I locked the car up, the left side indicator globes stayed permanently on. After a little while, and a few unlock / lock cycles, everything returned to normal. Pretty sure that I got water in one of the relays for the extra indicators fitted in the ARB bulbar.

[Richardli]

Cheers. I was hoping it would dry out but it's over 24 hrs since problem started and it is still evident. What is involved in a hard reset?.

[SBD4]

Did you pressure wash the engine bay? If so you are likely to have gotten some water in the transmission Control module. Make sure you dry it out!

have a look here:
http://www.aulro.com/afvb/d3-d4-rrs/...fter-wash.html

[LandyAndy]

From memory of Gordons GOE course there was one connector that was mentioned to be an issue.
Possibly where the air compressor is(under the gaurd).If nobody else has verified this tommorow I will get my GOE book out of the D4 and look it up.
Andrew

[LandyAndy]

Cheers. I was hoping it would dry out but it's over 24 hrs since problem started and it is still evident. What is involved in a hard reset?.

Remove battery leads then short them together,ie neg lead touch onto pos lead,BOTH disconnected from battery.CAUTION,if you have a second battery that MUST be disconnected BEFORE doing this.
If indoubt,search hard reset on AULRO for more peace of mind.
GOODLUCK
Andrew

[LandyAndy]

Did you pressure wash the engine bay? If so you are likely to have gotten some water in the transmission Control module. Make sure you dry it out!

have a look here:
http://www.aulro.com/afvb/d3-d4-rrs/...fter-wash.html

This MAY have been the issue discussed in the GOE course,will check the book tommorow.
Andrew

[SBD4]

Remove battery leads then short them together,ie neg lead touch onto pos lead,BOTH disconnected from battery.CAUTION,if you have a second battery that MUST be disconnected BEFORE doing this.
If indoubt,search hard reset on AULRO for more peace of mind.
GOODLUCK
Andrew

I learnt a different way to do the hard reset or "full system reset" the other day. I was told that after removing the battery leads, rather than short them together directly, instead, stand on the brake and pull on the high beam switch for 30 seconds to effect the short circuit. Apparently it is safer for the vehicle.

[jonesy63]

Meh! Did they do that on the assembly line - the very first time power was connected?

[BMKal]

I learnt a different way to do the hard reset or "full system reset" the other day. I was told that after removing the battery leads, rather than short them together directly, instead, stand on the brake and pull on the high beam switch for 30 seconds to effect the short circuit. Apparently it is safer for the vehicle.

With battery leads disconnected, I fail to see how standing on the brake and pulling on the high beam switch can possibly effect a short circuit.

But, no doubt, there's mysteries surrounding these vehicles that I'm yet to learn about.