Land Rover Discovery: Speed Control Sensor
Adjustment (G1780345)
/ General Procedures
SPECIAL TOOL(S)
![SPECIAL TOOL(S)](images/books/227/index415(2).jpg)
CHECK
NOTES:
- Special tool 310-148 is graduated in 0.5 degree increments.
- Removal steps in this procedure may contain installation details.
WARNING:
Make sure to support the vehicle with axle stands.
Raise and support the vehicle.
Refer to: Front Bumper Cover (501-19 Bumpers, Removal and
Installation).
NOTE:
Make sure that the special tool is installed to the front of the
speed control sensor as it is shown in the illustration to check
the level.
![Speed Control Sensor Adjustment (G1780345) General Procedures](images/books/227/index416(2).jpg)
Special Tool(s): 310-148
ADJUSTMENT
NOTES:
- The speed sensor has no mechanical horizontal adjustment.
- The speed sensor must point down by 0.5 degrees.
![Speed Control Sensor Adjustment (G1780345) General Procedures](images/books/227/index417(2).jpg)
Special Tool(s): 310-148
- From the diagnostic tool menu, select: Service Alignment
Mode.
- The follow indicator will now be flashing, this indicates that the
vehicle is in "service alignment" and now requires driving.
- The vehicle speed must be above 30 mph (48 kph).
- Choose a road with plenty of stationary objects, like street
lights, road signs, or barriers. Use an inside or outside lane.
- Following vehicles too closely will obscure the stationary
targets from the radar, a time gap of 2 seconds is
recommended.
- A straight road will produce a quicker and better result,
although the process will still operate on a curved road.
- When the flashing follow indicator light extinguishes, the ACC
system is now functional, and a required vehicle speed can now
be set by the driver and the ACC system will operate as
normal.
Speed Control Specifications
Vehicles with Adaptive Speed Control System:
NOTE:
The speed control sensor must point down by 0.5 degrees.
![Vehicles with Adaptive Speed Control System](images/books/227/index418(2).jpg)
Vehicles without Adaptive Speed Control System:
![Vehicles without Adaptive Speed Control System](images/books/227/index419(2).jpg)
READ NEXT:
PRINCIPLES OF OPERATION
For a detailed description of the Speed Control system, refer to the relevant
Description and Operation section in the workshop manual. REFER to:
Speed Control (310-03 Speed Co
REMOVAL
NOTE:
Removal steps in this procedure may contain installation details.
Make the air bag supplemental restraint system (SRS) safe.
Refer to: Standard Workshop Practices (100-00 General
Inform
SEE MORE:
The SUM uses a combination of information from other system modules and
data from the height sensors to measure the vehicle and suspension states
and driver inputs. Using this information, the SUM applies algorithms to
control the shock absorbers for the current driving conditions.
The SUM receives
The Head-Up Display (HUD) feature
projects driver information onto the inside
of the windscreen.
The information displayed is as follows:
Current gear selected.
Follow mode is active.
Cruise control set speed.
Cruise control or Adaptive Cruise
Control (ACC) is active.
Traffic sign recogniti