34 00 009 Perform brake test on test stand
Necessary preliminary work:
- Check tires for damage
- Check tire treads
- Checking tire pressure
- The brakes must be at normal operating temperature. To that end, warm up and dry off the brake discs by braking the vehicle a few times.
CAUTION:
- Only brake test stands with test speeds of 2.5-6 km/h may be used.
- On vehicles equipped with Dynamic Stability Control (DSC), the system needs to be deactivated!
- The warning light for the Dynamic Stability Control (DSC) inside the instrument cluster has to be illuminated!
Front brakes:
- Drive the front wheels of the vehicle onto the brake test stand
- Place the selector lever in selector lever position "N"
- Start the brake test stand
- Press service brake pedal
- Read off maximum brake power on left/right
Rear brakes:
- Drive the rear wheels of the vehicle onto the brake tester
- Place the selector lever in selector lever position "N"
- The parking brake control unit utilizes a plausibility check (wheel speed comparison) to detect the brake test stand within a few seconds and switches to brake test stand mode.
- The parking brake indicator light flashes slowly when brake test stand mode is activated and EMF actuators are released.
- Start the brake test stand
- Press service brake pedal
- Read off maximum brake power on left/right
Parking brake:
- Drive the rear wheels of the vehicle onto the brake tester
- Place the selector lever in selector lever position "N"
- The parking brake control unit utilizes a plausibility check (wheel speed comparison) to detect the brake test stand within a few seconds and switches to brake test stand mode.
- The parking brake indicator light flashes slowly when brake test stand mode is activated and EMF actuators are released.
- Start brake test stand.
- Actuate parking brake switch = application of brake pads.
- The parking brake indicator light flashes quickly when brake test stand mode is activated and EMF actuators are partially locked.
- Actuate parking brake switch = test force 1
- Actuate parking brake switch again = test force 2
- Actuate parking brake switch again = test force 3
- Read off maximum brake power on left/right
- The parking brake is released again when the button is actuated in the Release direction.
- The brake test stand mode is automatically terminated when the vehicle is driven off the brake test stand.
CAUTION:
A terminal change needs to be carried out after finishing the checks!
After the terminal change, all indicator lights go out!
After the terminal change, all indicator lights go out!