Warning: All work on the ABS control unit must be carried out by an authorised BMW workshop.
Caution: Disconnect the negative battery terminal first, then the positive one.
- Remove the battery.
See Group 00.
- Drain front and rear brake systems.
- Remove left and right rear footrests.
See Group 46.
- Remove left and right fairing side sections.
- Remove left and right battery covers.
Warning: Comply with safety precautions when handling or working with fuel.
- Remove fuel tank.
See Group 16.
![](https://motoinstruction.ru/img/bmw/21/127450.jpg)
- Remove securing screws (arrows) and remove retaining plate for plug connectors.
- Remove fasteners securing coolant expansion tank.
![](https://motoinstruction.ru/img/bmw/21/127451.jpg)
- Disconnect plug (2) from ABS control unit.
- Remove control unit for reverser.
See Group 61.
![](https://motoinstruction.ru/img/bmw/21/127452.jpg)
- Remove the holder (arrow) for the front brake lines from the main frame.
Caution: Do not allow brake fluid to come into contact with painted parts of the motorcycle, because brake fluid destroys paint. Wrap cloths around the ends of the pressure lines to prevent residual brake fluid escaping.
- Disconnect brake lines from ABS pressure modulator.
- Remove screws (1) securing the battery carrier to the frame.
![](https://motoinstruction.ru/img/bmw/21/127453.jpg)
- Remove retaining plate (1) for brake line from the battery carrier.
![](https://motoinstruction.ru/img/bmw/21/127454.jpg)
- Slightly raise ABS control unit (2) complete with battery carrier (3) and pull the assembly toward the rear.
- Release the retaining screws (arrows).
Caution: Take care not to scratch the frame while removing the ABS pressure modulator; cover with masking tape as necessary.
![](https://motoinstruction.ru/img/bmw/21/127455.jpg)
- Remove ABS control unit (2).
![](https://motoinstruction.ru/img/bmw/21/127456.jpg)
- Remove battery carrier (3), if necessary.
![](https://motoinstruction.ru/img/bmw/21/127457.jpg)
- Using a small screwdriver, press end cover (5) of ABS relay housing (4) in (arrow) and at the same time pull end cover (5) upwards.
- Scrap the old cover (5).
![](https://motoinstruction.ru/img/bmw/21/127458.jpg)
- Release the fasteners (arrows) for the cables and plug connector (7) at ABS relay base (6).
- Installation is the reverse of the removal procedure: pay particular attention to the following.
- Install a new end cover for the ABS relay housing.
- Route all cables correctly and secure with cable ties.
Note: The front fastener (long pointed screw) of the lefthand rear footrest plate is also the anchorage point for the battery carrier.
Tightening torques:
- ABS control unit to battery carrier M 5 — 4 Nm
- ABS control unit to battery carrier M 6 — 9 Nm
- Battery carrier to frame M 6 — 9 Nm
- Retaining plate for brake line to battery carrier — 4 Nm
- Brake lines to frame M 5 — 4 Nm
- Brake line at ABS control unit — 18 Nm
- Bleed screw in brake calliper/ABS pressure modulator — 10 Nm
- Grubscrew in filler adapter — 10 Nm
- Retaining plate for plug connectors to frame — 9 Nm
- Footrest plate to frame/battery carrier — 21 Nm
- Lifter handle to rear frame — 9 Nm
- Seat, rear, to rear frame — 9 Nm
Removing and installing ABS relay
Caution: Disconnect the negative battery terminal first, then the positive one.
- Remove the battery.
See Group 00.
- Remove left and right rear footrests.
See Group 46.
- Remove left and right fairing side sections.
- Remove left and right battery covers.
- Remove control unit for reverser.
See Group 61.
![](https://motoinstruction.ru/img/bmw/21/127459.jpg)
- Remove retaining plate (1) for brake line from the battery carrier.
![](https://motoinstruction.ru/img/bmw/21/127460.jpg)
- Remove screws (2) securing the battery carrier to the frame.
![](https://motoinstruction.ru/img/bmw/21/127461.jpg)
- Using a small screwdriver, press end cover (2) of ABS relay housing (1) in (arrow) and at the same time pull end cover (2) upwards.
- Scrap the old cover (2).
![](https://motoinstruction.ru/img/bmw/21/127462.jpg)
- Release the fasteners (arrows) for the cables and plug connector (3) at ABS relay base.
![](https://motoinstruction.ru/img/bmw/21/127463.jpg)
- Slightly raise ABS control unit (4) complete with battery carrier (5) and pull the assembly toward the rear.
![](https://motoinstruction.ru/img/bmw/21/127464.jpg)
- Pull ABS relay (6) and ABS relay base (7) out of the housing.
- Loosen fasteners (arrows).
- Pull ABS relay (6) up out of ABS relay base (7).
- Installation is the reverse of the removal procedure: pay particular attention to the following.
Caution: When inserting ABS relay (6) and ABS relay base (7), make sure that all cables are located in the correct guides.
- Install a new end cover for the ABS relay housing.
Tightening torques:
- Battery holder to frame M 6 — 9 Nm
- Retaining plate for brake line to battery carrier — 4 Nm
- Retaining plate for plug connectors to frame — 9 Nm
- Footrest plate to frame/battery carrier — 21 Nm
- Lifter handle to rear frame — 9 Nm
- Seat, rear, to rear frame — 9 Nm