On a B6 Passat with EPB (Electric Park Brake), this can only be done using a diagnostic tool such as VCDS or similar.
Screw the piston puck in clockwise. There is a tool for this (KN or KY) that is a box with little dowel pins to fit the slots in the caliper piston. What you are actually doing is resetting the parking brake. As the pads wear and you set the parking brake, each actuation of the parking brake foot lever ratchets the piston outward to componsate for pad wear.
If it is the front brake use a "C" clamp to retract piston If it is the rear and the parking brake is used by this caliper piston is threaded and a special tool (not expensive) available at Sears or auto parts to "screw" piston into caliper body
some model's that have the parking brake Incorporated into the rear caliper, you must compress and turn the piston until the proper clearance is obtained.
If parking brake is operated through service brake--then piston is threaded into caliper body--special tool is needed (not expensive) available at Sears or auto parts
take caliper off, and then remove brake pads... piston for the brake caliber must be spun in to reset it. dont try to puch it in, it will not move...
After changing pads? - pump brake pedal to set pads against rotor To retract to change pads? If parking brake is not connected to this caliper - compress piston into caliper body with a "C" clamp - if parking brake is installed on this unit a special tool (not expensive) is required because piston is threaded Tool is available at Sears or auto parts ========================= If you're talking about the rear disk pads, they are adjusted using a small screw (hidden behind a nother screw) on the caliper which adjusts the parking brake. You need to turn this screw to back off the calipers in order to install the new pads. Since the calipers are threaded, no amount of pushing will retract them.
If this is an Accord with rear drum (did they still make those in 05?) replace the cylinder. If it doesn't push in easily it is frozen and will never work again. Otherwise: Unmount the caliper and remove the pads. Disconnect the parking brake cable from the caliper parking brake lever. Use a purpose built tool (preferably not the cube shaped thing) to rotate the piston clockwise as it pushes the piston inward. Verify that the notch in the piston aligns with the teat of the brake pad. If not, rotate the piston counterclockwise until the notch is positioned to positively engage with the teat.
on the idepaent rear suspection for the parking brake
I believe you need a speaical tool that most parts stores sell, it fits into the piston and you can turn it with a ratchet and extension as the calipers acually turn to go in and out like a screw.
Rear disc ? if it is rear disc brakes there is a drum brake in side of the rear rotor that is your parking brake and has an adjuster in it if you pull the rotor off.
Compressing the rear brake caliper piston on a 2008 Chrysler Town and Country requires a special tool that pushes in and turns the piston at the same time.
Typically integral parking brakes are on rear disc braking systems. By activating the parking brake it adjusts the discs on the rear brakes. While the front discs are self adjusting, on the integral systems the rear discs are not self adjusting, thus the need for the integral parking brake system.