Jaguar XJ (X350). Service manual - part 110
Levelling Inhibit Function
When the system detects significant cornering, braking and acceleration, it inhibits levelling such that
it will not attempt to compensate for vehicle attitude changes.
Inclination Function
The system enables this function when parking on an uneven surface, (or with a wheel on a kerb, for
example) to ensure the vehicle attitude remains correct when driving off.
Rough Road Detection
When the system detects a rough road surface, the speed lowering function is inhibited, or cancelled,
bringing the vehicle back up to standard ride height to aid passenger comfort.
Trailer Towing Function
When the system detects that the vehicle is towing, (via the connection of the trailer socket) the
speed lowering function is inhibited.
NOTE:
This function will only be enabled by the Jaguar approved towing equipment.
Jacking Function
When the system detects that the vehicle is being jacked, or raised on a wheel-free lift, the vehicle
enters jacking mode, which inhibits lowering to prevent air loss.
Jacking mode is exited when the vehicle is driven, or the ride height passes below a threshold value.
Inspection and Verification
1 . Verify the customer concern.
2 . Confirm which, if any, warning lights and/or messages were displayed on the instrument cluster.
The following messages can be displayed:
•
vehicle too low
•
air suspension fault
3 . Visually inspect for obvious signs of mechanical or electrical damage.
Mechanical
Electrical
•
Tire pressures
•
Suspension components
(wear/damage/security)
•
Air springs (leakage/damage/tampering)
•
Reservoir
•
Compressor
•
Fuse(s)
•
Wiring harness/electrical connectors
•
Controller area network circuits. For
additional information,
•
Sensors