| Description and Operation The Auxiliary Warning System (AWS) comprises a number of sensors, transducers and displays with electronic control. The displays are located in the centre of the instrument cluster. One consists of a car outline with door ajar, lamp failure and ice warnings indication. The other display has two warning lamps. The low fuel warning indicator is located in the top of the fuel gauge. When the ignition is turned on a bulb function test illuminates the warning symbols for five seconds and then extinguishes them if there are no warnings. Door/Tailgate Ajar (Five Warnings) The ajar switch mounted on each door aperture and tailgate lid lock assembly, consists of a single pair of normally - closed contacts which are shared with the courtesy light. The switch is closed only when the door is fully shut, when it presents a safe condition. If the door is open or shut onto the first latch position, the contacts will be open and present a warning condition. Ice Warning (Two Warnings) This warning consists of two amber snowflakes. The first amber warning illuminates when the outside temperature is between 0°C and 4°C inclusive. The second amber warning illuminates when the outside air temperature falls below 0°C. Negative temperature changes are displayed immediately, positive temperature changes are compensated for by the engine coolant temperature and vehicle speed. Air Temperature The low air temperature sensor contains a negative temperature coefficient thermistor. The resistance seen by the control electronics decrease as temperature increases. In view of the small currents in the sensor (necessary to prevent self‐heating) a local earth is not used and both terminals of the sensor are returned to the control electronics. Low Fuel This warning indicates that the remaining fuel in the tank has reached approximately eight litres, corresponding to the top of the red section on the fuel gauge. The circuit takes an analogue input from the tank sender. In common with other dynamic fluid level indicators, this input is ``anti‐sloshed" by the electronics to help prevent erroneous warnings. Low Coolant This warning indicates low engine coolant level. The circuit takes a digital input from the coolant level sensor. In common with other dynamic fluid level indicators, this input is ``anti‐sloshed" by the electronics to help prevent erroneous warnings. The low coolant level sensor comprises of two metal pins insulated from each other which are immersed in the coolant. When the coolant level is low the resistance of the sensor rises. The sensor is incorporated into the reservoir. Low Screen Washer Fluid This warning indicates low screen washer fluid level. The circuit takes a digital input from the washer bottle level sensor. In common with other dynamic fluid level indicators this input is ``anti‐sloshed" by the electronics to help prevent erroneous warnings. The low screen washer fluid level sensor comprises of two metal pins insulted from each other which are immersed in the washer fluid. When the washer fluid level is low the resistance of the sensor rises. The sensor is incorporated into the washer reservoir. Central Timer/Bulb Failure Module The central timer/bulb failure module has two basic functions, the first controls the chime warnings for: - Door Ajar with lights on
- Door open when not in park
The time delay warnings for: - Windscreen wipers
- Heated windows
- Interior lights.
The second indicates a bulb failure, by measuring current, in (dipped) headlights, side lights and brake lights. Warnings are indicated by the illumination of the bulb symbol on each corner of the AWS display. | 
