Can someone explain what happens/goes on with the ABS. When I switch on the ignition, I hear the sound of a pump start up (not the fuel pump) in the engine bay. This runs till I hear a click (5 secs or so), then the process repeats again at infinitum. I don't understand what exactly is going on. I am sure it is something to do with the ABS. I can guess that it needs pressure in some part of the system to pulse the brakes (if required), but I don't see a need to keep charging this pressure. The light on the dash seems to work OK. Any suggestions?. The CD manual doesn't tell what is happening when I switch on the ignition. Only how the system operates in the event of the ABS needing to modulate the braking pressure. Have I got a fault?. Should this thing keep running/recharging continuously. If I look on the circuit diagrams (electrical), I don't see a pressure switch that could cause this.
Any ideas or enlightenment would be appreciated.
Cheers... Rob.