Parking Brake Fault with Girodisc Rotors on rear
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Thread: Parking Brake Fault with Girodisc Rotors on rear

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    Parking Brake Fault with Girodisc Rotors on rear

    I have Girodisc rotors (front and rear) for about 2 years now. After about 6 months I would get an intermittent Parking Brake Fault -- Release Parking Brake. This gradually began to occur more frequently, and now it is constant. My service tech suspects the diameter and aluminum hats of the Girodisc may be allowing the parking brake shoe to travel too far. Replacing the servo actuator assembly is $1150 !!! and it may not resolve the issue, if the cause is the Girodisc rotor vs stock.

    Just asking if anyone else with Girodisc on rears is experiencing this issue, before I "gamble" on an actuator replacement.

    UPDATE: I came across this thread that mentions a "calibration" process for the parking brake shoes.. Logically, it would seem to me that re-calibrating might remove the fault I'm receiving where the computer thinks the left rear actuator has "travelled too far"... Anyone with experience on this process or condition???

    https://www.planet-9.com/981-cayman-...ml#post2108987


    Thanks in Advance...
    Last edited by ereynold60; 04-18-2019 at 05:56 PM.
    2014 Cayman S, Platinum Silver on black, PDK, PASM, SC, PSE, PCM 4.41, 20" Carrera S Wheels, BiXenon/PDLS, SportDesign wheel/paddles, Power Sport Seats(14-way), Seat ventilation, Premium package, Bose infotainment package

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    Re: Parking Brake Fault with Girodisc Rotors on rear

    An update in case anyone else experiences this Parking Brake Fault... I had my service tech perform the following procedure which took less than one hour of labor:

    WM 468316 ADJUSTING PARKING-BRAKE SHOES

    The air gap was close to 5mm where the spec calls for something like 1.6 to 2.0 mm.
    2014 Cayman S, Platinum Silver on black, PDK, PASM, SC, PSE, PCM 4.41, 20" Carrera S Wheels, BiXenon/PDLS, SportDesign wheel/paddles, Power Sport Seats(14-way), Seat ventilation, Premium package, Bose infotainment package

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    Re: Parking Brake Fault with Girodisc Rotors on rear

    So, did that fix the problem? Or we need to wait a bit and see?
    14 GT Silver / Espresso CS: PDK, SportC, PASM, 14 ways w prem. pkg and a few other things...

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    Re: Parking Brake Fault with Girodisc Rotors on rear

    Quote Originally Posted by Oldboy View Post
    So, did that fix the problem? Or we need to wait a bit and see?
    So far... yes. But it has only been one day. With the air gap adjusted, I can hear the parking brake tightening much faster... i.e. it has less travel.

    Probably need to use it consistently over a month's time to confirm it as a "fix". However, my service tech and I discussed that Girodisc rotors are "larger, but not necessarily the hats where the parking brake shoes make contact. We suspect that the aluminum hats allow the parking brake shoes to travel a bit further, thus creating the fault condition. I suspect that my "air gap" was already too large, and eventually the total travel exceeded whatever limit the control unit will tolerate.

    [my .02... another example of a 'computer' just getting in the way of a simple mechanical function... sigh]
    2014 Cayman S, Platinum Silver on black, PDK, PASM, SC, PSE, PCM 4.41, 20" Carrera S Wheels, BiXenon/PDLS, SportDesign wheel/paddles, Power Sport Seats(14-way), Seat ventilation, Premium package, Bose infotainment package

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    Re: Parking Brake Fault with Girodisc Rotors on rear

    I recently put Sebro slotted rear rotors on my car and I noticed one rotor was hard to get over the parking brake and the other was looser, but I did not retract them or calibrate them afterwards.

    V6

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