LR3/Disco 3
The following table shows the messages that can be displayed in the message centre of a high-line instrument cluster
relating to the electronic rear differential:
On vehicles fitted with the low line instrument cluster, in place of the message centre there will be a status lamp, which
has the following logic:
l
Amber - Over temperature
l
Red - Failure, stop vehicle
TERRAIN RESPONSE™
The Terrain Response™ system allows the driver to select a program, which will provide the optimum settings for traction
and performance for the prevailing terrain conditions.
The system is controlled by a rotary control located on the centre console.
The system uses a combination of vehicle subsystems to achieve the required vehicle characteristics for the terrain
selected. The following subsystems form the Terrain Response™ system:
l
Engine management system
l
Automatic transmission (if fitted)
l
Transfer box
l
Brake system
l
Air suspension.
Each subsystem control module provides a feedback for the selected program so that the Terrain Response™ control
module can check that all systems are controlling the system correctly. The exception to this is the electronic rear
differential control module which does not provide feedback to the Terrain Response™ system as it is a slave to the
transfer box control module. For additional information, refer to
Ride and Handling Optimization
(204-06 Ride and
Handling Optimization)
SERVICE
The oil used in the electronic rear differential is Castrol SAF-Carbon Mod Plus. The oil contains unique additives and
friction modifiers, which enhance the differentials operation. No other oil must be used in the electronic rear differential.
Electronic Rear Differential Serviceable Components
Message
Description
Chime
'TRANSMISSION
OVERHEAT'
Rear differential temperature has reached or is approaching the overheat
threshold.
None
'TRANSMISSION FAULT'
Transfer box control module has stopped transmitting CAN bus messages.
Defaults to open centre differential.
None
'TRANSMISSION FAULT'
Fault has occurred with electronic rear differential. Stop vehicle at earliest
opportunity.
Single
