Safety Circuit

The safety circuit detects faulty signals from sensor, faults in the control module and in the electric line system. Actuation of the high-pressure/return-flow pump is monitored during the control process. The solenoid valves are monitored permanently. If a fault is detected, the system is shut down and the driver is alerted by the lighting of the BAS/ESP indicator lamp (A1e47). In addition, a fault code is stored in the control module.

Moreover, the safety circuit continuously monitors the battery voltage. If the voltage falls below 10.5V or exceeds 17.5V, the system is switched off until the voltage returns to the specified range.