Self-diagnosis The following measures are implemented automatically depending on the significance of the fault: D Changeover to suitable substitute function to enable continued yet restricted operation D Reduction of engine speed to idle speed (drive stage 0) D Immediate shut-down of the engine if required for safety reasons. Depending on the type of fault, engine shut-down is done by reducing the fuel delivery volume to zero or by way of an emergency shut-down with safety relay. Flash code To read out the fault memory D With the engine stationary or running and the “ignition“ switched on, press and hold the diagnosis re- quest button for at least 2 seconds.
The diagnosis lamp will not come on D The flash procedure starts after a pause of approximately 3 seconds. The flash code is divided into long and short pulses D The diagnostic system always outputs only one fault at a time. In order to check whether several faults are stored, the fault scanning procedure must be repeated until the fault that was shown first reappears 20 18/19 49 Example of a flash code output On Lamp Off 0.5 sec Fault 2x long, 5x short OFF phase before output: 3 seconds ON duration of a long pulse: 2 seconds OFF phase between two long pulses: 1 second OFF phase between long and short pulses: 5 seconds ON duration of a short pulse:
0,5 seconds OFF phase between two short pulses: 0,5 seconds To clear fault memory 1. Press request button 2. Switch on ignition 3. Press and hold request button for a further 3 seconds but not longer than 10 seconds 21