The AL4T System has a built-in Diagnostics Display on the side of the ECU housing (see above Diagram) with one green and five red LEDs. Any fault detected by the ECU will be shown on the Diagnostics Display as well as being signalled by the illumination of the Trailer Headboard Warning Lamp. When a fault is indicated, it is good practice to reset the display to ensure that the fault is still present. This is done by passing a magnet closely across the word "RESET" on the face of the display window (a wheel Speed Sensor can be used as the magnet). If resetting is successful, then all LEDs in the display will illuminate. After resetting, if a fault is still present, then the Diagnostics Display will show the nature of the fault. |