2001 disco II SE would not start got jump but did not work. Battery checked out as having dead cell. New battery installed and now wont turn over. I figured I immobilized engine. Tried the 1-5-1-5 code resent with key but no luck. Does anyone know the right procedure? got to be off early tomorrow.

 

Try this.

Immobilized, can't turn alarm off - Land Rover Forums : Land Rover and Range Rover Forum

or

http://www.rangerovers.net/repairdet...ecm/alarm.html

 

Lock and unlock the door 3 times in a row, also reset the inerita switch on the fire wall near the heater hoses.