AR42.46-P-0005T Prevent SBC Self-Test & Apply Brake Pads, W/O Star Diagnosis
Prevent SBC Self-test And Apply Brake Pads, Without STAR DIAGNOSIS
Remove/Install
DANGER:
- Risk of injury. When working on the SBC brake system, body parts may be jammed 01 crushed and skin and eye injuries may result due to brake fluid escaping under high pressure.
- Disable the SBC self-test
- Lethal injuries are possible if vehicle slips off of lifting platform
- Align vehicle between the columns of the lifting platform and position the four support plates at the lifting platform support points specified by the vehicle manufacturer.
CAUTION:
- See notes on repairs to brake system
- The SBC system must be deactivated on a mandatory basis using STAR DIAGNOSIS before working on the operating unit or hydraulic unit.
- Brake lining replacement and brake fluid change must not be carried out simultaneously.
- Before working on the SBC brake system the sequence of the SBC self-test must be prevented, as this leads to the brake pistons moving out automatically.
- When working on the SBC brake system the brake pedal must not be pressed under any circumstances as this leads to the brake pistons moving out automatically.
- Inadvertent operation of the brake pedal must be prevented reliably by suitable measures. When working on the SBC brake system no persons or animals must stay in the vehicle
NOTE:
- Before starting work it is absolutely essential to read through the complete work description as the operations have to be completed in rapid succession. To carry out the operations correctly a second person must be present as within the work procedure certain signals cannot be seen by one person
- If the work procedure is revised or if the time requirements cannot be adhered to, the operations cannot be carried out correctly
1 Position the vehicle on the two-pillar or four-pillar lifting platform
2 Open driver-side side window
3 Switch off all the vehicle's electrical consumers and remove the key from the ignition switch
NOTE: Vehicles with code (889) Keyless Go: Press starting-stop button repeatedly until the ignition is switched off.
Disable the SBC self-test
4 Close the vehicle doors and have the vehicle locked globally for a minimum of 30 seconds (t1)
NOTE:
- Vehicles with code (889) Keyless Go: Remove Keyless Go cards or key from the vehicle and keep safely outside the transmitter range (at least 2 m).
- During this time the run-on of the SBC brake system elapses.
5 Unlock vehicle for a minimum of 15 seconds (t2)
NOTE:
- From now on the brake pedal must not be pressed anymore.
- An SBC self-test may run during this time.
6 Lock vehicle
NOTE:
- In order to prevent people getting in. If the engine hood is unlocked when the vehicle is locked, the alarm system is triggered.
- 15 seconds after locking the following operations can be carried out in the wheel brake area:
- Replace front and rear brake pads.
- Detach/attach front and rear brake disks.
- Remove/Install parking brake shoes. Once the operations are completed the application routine must be activated
Activate application routine of brake pads
NOTE: The hydraulic unit temperature must be a maximum of 80 degrees C
7 Unlock vehicle
8 Raise the vehicle until all the wheels can be rotated freely
9 Ignition On (Z2)
NOTE: Through the open side window. Vehicles with code (889) Keyless Go : Do not activate any Keyless-Go functions for the following operations.
10 Ignition Off (Z0), wait for 1 to 5 seconds t2 and switch ignition On again (Z2)
NOTE:
- Do not start engine!
- The ignition remains switched on for the further steps.
11 Rotate the rear left wheel in the running direction swiftly and evenly
NOTE: Rotate the wheel for a minimum of 3 seconds (t3) (1 to 2 revolution(s)), then bring the wheel to a stand still.
12 Rotate the left front wheel in the running direction swiftly and evenly
NOTE:
- The left front wheel must be rotated a maximum of 60 seconds (t5) after the left rear wheel.
- Rotate the wheel (1 to 2 revolution(s)) until it is stalled automatically.
- Flashing on and off 3 times confirms successful activation, the brake lining application routine is started. The front and rear brake pads are applied several times.
- After approx. 50 seconds the brake lining application is ended.
13 Lower the vehicle and switch off ignition (Z0)
14 Start the engine and depress the brake pedal 5 to 10 times
NOTE: If a fault message is displayed in the multifunction display then repeat activation of application routine. If the error message continues to be shown in the multifunction display after repeating the application routine several times, apply the brake pads using STAR DIAGNOSIS, read out and erase diagnostic trouble code memory.