It's on the "Adjustments" section. Hydraulic unit bleed.
Description:
This procedure will flush the hydraulic lines of the ABS module. Perform the procedure after replacing the ABS unit, or when changing the brake fluid. Keep the brake pedal pressed during the entire procedure. The pedal will first sink to floor and then raise back to top.
Basically the procedure will open all drain valves and fill both accumulators with brake fluid from the master cylinder, then it will use the hydraulic pump to return all fluid back to master cylinder. This way the fluid will be cycled through all internal ABS hydraulic lines.
Before executing this procedure make sure that there is enough brake fluid in the reservoir and also loosen its cap.