L322 Range Rover Driving Aids Diagnostic Operation
DRIVING AIDS
DESCRIPTION AND OPERATION 86-10-7
The PDC ECU software incorporates routines that compensate for the effect of ice, frost and rain on the acoustic
sensors. Ice compensation occurs if the ambient temperature is less than 6
°
C (43
°
F).
Diagnostics
The PDC ECU performs self check routines and checks the system wiring for short and open circuits. While the
system is active the PDC ECU also monitors the data from the acoustic sensors.
If a fault is detected, a related fault code is stored in the non volatile memory of the PDC ECU and either the front
sensors, the rear sensors or the complete system is disabled, as appropriate. To advise the driver of the failure, the
PDC ECU flashes the indicator LED at 2 Hz and sounds a continuous warning tone for 3 seconds, in place of the
normal short tone, when the system is activated.
Fault codes can be accessed using TestBook/T4, which communicates with the PDC ECU via the instrument pack
and the I bus.