Land Rover Repair: Range Rover 2004 Air Suspension Inactive Error., negative cable, necessary procedures

Question
I replaced the battery on my Hse 2004, but when I turned it on all lights are on ( ABS, BRAKE, and Air Suspension Inactive Error code) How would I reset the Computer on the truck, It happened before, when I purchased it the dealer had left lights on, and it drained the battery, when they turned it on the same thing had happened, but I dont know what they had done to turn it off, also The air compressor is good, brakes and sensors were replcd recently, I know everything is good. Please help. thanks

Answer
Hi Ilich,

could be within the security system.  Here is a website that has loads of details on this and the necessary procedures to correct them.  Depends on which model and country you are in.

http://rangerovers.net/repairdetails/becm/alarm.html

refer to EKA procedure.

Other than that, it is always advised that when you disconnect your battery:  

wait 2 minutes after you have removed the key from the ignition BEFORE disconnecting the negative cable.

Best of luck,

JohnMc