BMW X5: Checking Brakes On Test Stand
IMPORTANT: Only brake test stands (analyzers) with test speeds of 2.5 -
6 km/h may be used.
Before driving onto the brake test stand (dynamic brake analyzer), switch off
the Hill Descent Control (HDC) and keep it switched off while testing the
brakes.
The HDC indicator lamp must not light up!
NOTE: It is possible for the HDC indicator lamp to go out or not to
light up even when HDC mode is activated if HDC is temporarily unavailable on
account of high
operating temperature.
Fig. 1: Identifying HDC Indicator Lamp
Necessary preliminary tasks:
- Check tires for damage
- Check Tyre treads
- Check Tyre pressure
- The brakes must be at normal operating temperature. For this purpose,
gently warm up the brake discs
while dry by braking the vehicle several times.
IMPORTANT: For testing, turn on the ignition and make sure the
transmission selector lever
is in the "N" position.
Comfort access: insert remote control in ignition lock.
NOTE: If the remote control is not inserted in the ignition lock, the
"P" transmission
position is selected automatically after approx. 30 minutes.
Failure to comply with this instruction may result in damage to the test stand
or
to the vehicle.
Visual and function checks of actuating and warning devices.
Front brakes:
- Drive vehicle with front axle into roller dynamometer
- Move transmission selector lever to "N" position
- Start roller dynamometer
- Press service brake pedal
- Read off maximum brake power on left / right
Fig. 2: Identifying Front Brake Actuating And Warning Devices
Rear brakes:
- Drive vehicle with rear axle into roller dynamometer
- Move transmission selector lever to "N" position
- Start roller dynamometer
- Press service brake pedal
- Read off maximum brake power on left / right
Fig. 3: Identifying Front Brakes Actuating And Warning Devices
Parking brake :
IMPORTANT: The test may only be carried out with the engine switched
off, the transmission
selector lever in the "N" position and the ignition switched on.
NOTE: The electromechanical parking brake cannot be tested on a plate
test stand!
Fig. 4: Identifying Front Brakes Actuating And Warning Devices
- Drive vehicle with rear axle into roller dynamometer
- Move transmission selector lever to "N" position
- Switch off engine
NOTE: When the engine is running, additional braking action will
otherwise be
exerted by the DSC system on all the wheels.
- Turn on ignition
- Start roller dynamometer
- Activate parking brake, pull button (1) for this purpose
NOTE: Parking brake indicator lamp in instrument cluster lights up red.
Duo-servo
brake (actuating unit) is applied. Roller dynamometer shuts down
after locking of wheels (slip) or vehicle is pushed out of roller
dynamometer
- Deactivate parking brake:
- Press button (1) and simultaneously press service brake pedal
NOTE: Duo-servo brake (actuating unit) is released.
- Read off maximum brake power on left / right
Fig. 5: Identifying Parking Brake Indicator Lamp Button
Fig. 6: Identifying Front Brakes Actuating And Warning Devices
READ NEXT:
Special tools required:
34 1 260.
NOTE: The thickness of the outer brake pads can be determined without
removing the
wheels.
If necessary, move car until opening for brake pad wear indicator (bra
Necessary preliminary tasks:
Remove left microfilter housing cover.
IMPORTANT: When replacing or repairing, observe the filling and
bleeding instructions for
the following parts:
Tandem brake ma
Necessary preliminary tasks:
Remove left microfilter housing cover.
Read and comply with General Information.
IMPORTANT: When carrying out repairs to the brake system, follow the
procedure set ou
SEE MORE:
REMOVING AND INSTALLING/REPLACING INTAKE FILTER HOUSING (N52K)
Necessary preliminary tasks:
Switch off ignition
Lever out expansion rivets (1).
Press lock (2) and raise intake duct (3).
Detach intake duct (3) from air filter housing and remove.
Fig. 8: Identifying Expansion Rivets, Lock And Int
IMPORTANT: Read and comply with notes on protection against
electrostatic damage (ESD
protection).
Necessary preliminary tasks:
Switch off ignition
Disconnect battery negative lead.
Remove microfilter housing.
IMPORTANT: Follow instructions for removing and installing electronic
control units