Problem: The shop had replaced the HCU and
attempted to bleed the brakes with Ford IDS scan tool and
pressure bleeder. On numerous attempts, they kept getting scan
tool error “06” when bleeding last wheel (Left Front Wheel).
Details: The OE instructions state that, when
bleeding the brakes at the last wheel, you are required to pump
the pedal 30 times – All the other wheels require you to pump the
pedal 10 times. The ALLDATA Tech-Assist Consultant advised that
the problem may be that the hose between the pressure bleeder and
the master cylinder reservoir was not a large enough ID (inside
diameter) to keep up with the demand for fluid volume, while
maintaining the correct pressure.
Confirmed Repair: The tech installed a larger ID
hose and the system was able to be bled properly. Ford says to
have 1 ½ gallons of brake fluid available for this procedure.
When the tech used the correct ID hose, most of that amount was