Bleeding Brake System (Without STAR DIAGNOSIS Compact Diagnosis System): Notes
Brake pad replacement and brake bleeding must not be carried out simultaneously. Before working on SBC system, the SBC self-test must be prevented or brake pistons will move out automatically. When working on the SBC brake system the brake pedal must not be pressed under any circumstances or brake pistons will move out automatically. Inadvertent operation of the brake pedal MUST BE prevented. Before starting work, it is absolutely essential to read through the complete work description, the operations have to be completed in rapid succession. To carry out the operations correctly a second person must be present, certain signals cannot be seen by one person. If work procedure is revised or timing specifications are not maintained, work cannot be carried out correctly.
- Place vehicle onto lift.
- Open driver's window.
- Switch off all electrical consumers and remove key from ignition switch. Vehicles with Keyless Go, press Start/Stop button repeatedly until ignition is switched off.
- Pull hood release lever and close doors.
- Open hood.
- Raise vehicle until wheels are clear of the ground.
- Lock vehicle doors, leave vehicle locked for at least 30 seconds (t1). See Fig 1 . Vehicles with Keyless Go, remove Keyless Go cards or key from vehicle and store outside of transmitter range for at least 2 minutes. During this time, run-on of the SBC self-test elapses.
- Unlock vehicle. SBC self test may proceed.
- Connect battery charger to rear on-board electrical system battery by connecting "-" lead of charger to body ground (DO NOT connect to "-" terminal of battery) so that battery control unit detects charging of battery.
- Connect brake bleeding equipment to brake fluid expansion reservoir. Follow manufacturer's operating instructions. Brake bleeding unit must reach a pressure of 29-44 psi (2-3 bar). See Figure . Bleed front brake calipers. See BLEEDING FRONT BRAKE CALIPERS .