Electronic Engine Controls – Armoured
CAUTION: It is imperative that the correct calibration is installed into this engine control module (ECM). In the
event of any doubt, advise should be taken from the Jaguar technical help-line.
Maximum Speed Limit
Modifications have been made to the engine control module (ECM) calibration to improve drivability due to
the extra weight of the glass and armour fitted to the vehicle. If a new ECM is installed, the revised software
must be loaded using the approved Jaguar diagnostic tool. The maximum speed of the vehicle has been
limited to 195 kph (121 mile/h) due to the extra weight of the glass, armour and tire load and speed rating of
the vehicle.
Inertia Fuel Shutoff (IFS) Switch
The fuel pump relay earths through the ECM, via the inertia fuel shutoff (IFS) switch. If, the IFS is
activated, it breaks the path to earth of the fuel pump relay, turning off the fuel pump. The IFS override
switch bypasses the IFS and provides an earth for the fuel pump relay, allowing the vehicle to be driven in
an emergency situation.
Published: Mar 12, 2014
Vehicles