PCM Connection

The PCM (Powertrain Control Module) is used in Europe on Ford and Land Rover applications. The signal works in the same way as the DFM signal, but now the car ECU is sending this signal to the regulator to change the VSP (Voltage Set Point) depending also on the battery state (AS) and the load (LI) at that specific moment.

The wider the pulse is, the higher the VSP will be and vice versa. This signal has a standard setting of 5volts, 125Hz and 55% PWM to get a VSP of about 14,2 volt.