Do not just disconnect the battery for 10 seconds. You need a full capacitive discharge.
Modern JLR vehicles (like the Range Rover Sport, Evoque, Discovery, or Jaguar F-Pace) are smart. Very smart. There is a pressure-sensitive mat embedded in the passenger seat. This mat detects: land rover jaguar b13c2-49
If the sensor fails internally (that’s the “-49” suffix, meaning “internal electronic failure”), the car gets confused. As a result: Do not just disconnect the battery for 10 seconds
If the fan circuit on the main board is damaged (e.g., blown FET or driver IC), you must replace the entire module. Used modules require dealer programming with the vehicle’s VIN (anti-theft protection). New modules come blank and must be configured via JLR SDD. If the sensor fails internally (that’s the “-49”