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Home >> BMW >> 2009 >> 650i 2D Convertible, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 3025 (Brakes - Repair) >> Brake Testing And Bleeding >> 34 00... Instructions for brake testing for E70 / E71 (AWD) >> Manufacturing period: as of volume production launch

Manufacturing period: as of volume production launch

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  1. Checking service brake:
    IMPORTANT: Before driving onto the brake test stand (dynamic brake analyser), switch off the Hill Descent Control (HDC) and keep it switched off while testing the brakes.
    The HDC indicator lamp must not light up!
    It is possible for the HDC indicator lamp to go out or not to light up even when HDC operation is activated. This may be because HDC is temporarily unavailable due to high brake temperature.
    Carry out brake testing with selector lever in N position (Neutral) only.

    Selecting a gear causes the transfer case clutch to close when the analyser rollers start up. Consequently the stationary axle is also driven, and the vehicle surges from the analyser. Because the front and rear axles are now coupled, the axle to be tested then increases the brake force until the analyser is shut down.

  2. Checking parking brake:
    IMPORTANT: The test may only be carried out with the engine switched off, the selector lever in the "N" position and the ignition switched on.

    The electromechanical parking brake can not be tested on a plate test stand.

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