Neville

It's the module that reads and checks the code from the key. It is located behind the top vent of the heater behind the dash. In an IS220, So it is not easy to get to. I've moved it so it is now behind the clocks therefore easier to get to in the future should I need to. As for what was wrong with it I think some of the conductive track was coming away from the PCB or a dry joint, couldn'tbesurewithouta magnifier. Anyway I ran some solder over some of the joints and for good measure heated it with a hairdryer (set to a heat you would not use on your hair) to stick the track back down.. (all the episodes of the A-Team I watched as a child were not wasted) and the cars is working as it should. As for auto electricians. Speak to people and get recommendations. I did in the end and found a brilliant one who put me on to the problem Mick Able Auto Electrician. Do not just find one on the internet. Hope this helps someone so they don't have to do all messing around I did.

UPDATE.... found the problem to be the ID code box. With some fine fettling it's working now. YAY!!!

Update... Thanks for the pointers. I've double checked all fuses and relays, checked and rechecked every earth I can find including those buried away bottom rear of the engine nearside. Tried the reprogramming but as the electrics are off has made no difference. I'm thinking it may be the key and I only have one which isn't the master. But surely if it was the key the dash would still work and say key not detected. Am I right in thinking this? Oh, and the only time the security light stops flashing is when I disconnect the battery. Stays on when I enter the vehicle.

Hi, I'm hoping someone can help me. I have a 2006 IS 220d and several weeks ago I got to the car and unlocked the doors got in and it was dead. Security light flashes and the green back light on the start button is illuminated, no amber LED though. The clocks, stereo, everything is dead. I have checked the earth from the battery which was a week old, replaced the fob battery. Linkable fuse and all others are ok. Four auto electricians have looked at the car, 3 couldn't get communication as the ignition hasn't power and the fourth pulled codes B2799 and B2281. Due to this I bought a second hand kit including engine ECU, body control, steering column, smart key and smart key module, key receivers, under dash fuse boxes, power control module, start button and clocks. Nothing changed. So I put all the original parts back on to the car. Any ideas would be much appreciated.