The start load response function prevents the alternator already supplying current during the engine start procedure. This results in a slight mechanical resistance for the starter ensuring improved starting characteristics particularly at low temperatures. .
The start load response function prevents the alternator generating current for up to 2 s after starting the engine. As a result the alternator current increases at a rate of approx. 10 Amps per second.
The starting characteristics can be severely impaired if the start load response function fails.