Discovery II Instruments: Description and Operation - Page 1785
INSTRUMENTS
DESCRIPTION AND OPERATION
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Active Cornering Enhancement (ACE) warning lamp
On vehicles fitted with ACE an LED within the instrument pack is used to alert the driver that the ACE ECU has
detected a fault in the system, providing the driver with a visible warning. The ACE warning lamp utilises an amber
LED and a clear legend.
When the ignition is switched on the ACE ECU illuminates the LED to provide a self-check, providing there is no fault
it will remain illuminated for 3 seconds or until the ignition is switched off.
The power input for the LED is supplied by the instrument pack via fuse 13. The ACE ECU provides the earth path to
illuminate the warning lamp.
The voltage on the earth path from the ACE ECU to the instrument pack has the following functions:
l
< 1.8 volts = warning lamp on.
l
> 7.7 volts = warning lamp off.