Discovery II
REAR SUSPENSION
64-20
DESCRIPTION AND OPERATION
SLS off-road mode switch
Air supply unit air control valves
Air supply unit compressor
Failure
Effect
Fault in wiring harness
Off-road mode cannot be selected
Failure of off-road mode switch
Off-road mode is activated when switch has not
been selected
Failure
Effect
Valves open or short circuit
Vehicle does not level or levels unevenly
Failure
Effect
Faulty relay, harness fault or compressor fault
Vehicle does not level upwards
