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Overspeed warning lamp

Fig 1: Identifying Overspeed Warning Lamp
G03351946Courtesy of LAND ROVER NORTH AMERICA, INC.

The overspeed warning lamp within the instrument pack utilizes an amber LED and a clear legend. The BCU illuminates the LED when the vehicle speed has exceeded 77 mph (123 km/h) and remains on until the vehicle speed falls below 74 mph (118 km/h), providing the driver with a visible warning. There is no self-check for this warning lamp.

There are two configurations for this warning lamp:

The instrument pack provides the power input and the warning lamp is controlled by the instrument pack according to PWM signal received from the ECM. The road speed information is derived from the SLABS ECU.

The lamp activation thresholds are shown in the table below:

LAMP ACTIVATION THRESHOLDS

Lamp on Lamp off
Input pulse, Hz 165.75 158.83
Road speed, mph (km/h) 77 (123) 74 (118.5)