Here's what you can do with a dedicated tool(from hawkeye menu), most of them have enable/disable options
Menus - Security
Security - 10AS
Defender
Defender (L316) (2007 -)
Discovery I
-Live Data
-Programming:
GEMS Immobilisation
Spider Immobilisation
EDC Immobilisation
DDS Immobilisation
Catalyst Overheat Warning
Land Rover Defender
Discovery Interior Lights
Defender Interior Lights
Pulsed Horn
Hazards ON Alarm Triggered
Hazards ON Alarm Arm / Disarm
Passive Immobilisation
CDL Operative With Alarm Armed
Immobiliser Off With Ignition
Disarm Alarm / Immob. With Key
Disarm Alarm Only with Key
Unlock Vehicle - No Disarm
Mislock Sounder
LED Indication of Alarm Trigger
-Transmitters
Discovery Td5 (2000), manual, tuned
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