Land Rover Discovery: Speed Control Sensor Adjustment (G1780345) / General Procedures

SPECIAL TOOL(S)

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.

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.

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 without Adaptive Speed Control System:

Speed Control Sensor (G1780348) / Removal and InstallationSpeed Control Speed Control / Diagnosis and Testing

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