Anti-lock ABS and TC brake system assemblies and units — removal and installation (Opel Astra G)

Solenoid valve block

1. Remove the battery, battery tray and relay panel. Disconnect the connectors, unscrew the 3 nuts and remove the panel bracket.

2. Remove the valve block tube holder.

3. Remove the fluid from the brake reservoir.

4. Disconnect all pipes from the valve block and the brake master cylinder. Plug the holes in the valve block.

5. Disconnect the connector on the valve block by lifting the bracket (see photo).



6. Loosen the bolts and remove the block without disturbing its original position.

7. Installation is carried out in the reverse order. Remove air from the brake hydraulic drive.

Wheel speed sensor

8. The sensor is built into the wheel hubs. If the sensor is faulty, the hub should be replaced.

Traction control switch

9. The sensor is installed on the dashboard in the passenger compartment. Pry and remove the sensor.

ABS system processor unit

10. Remove the valve block. Unscrew the bolts and remove the processor unit, disconnecting the wire, taking care not to damage the coil holder. Remove the seal from the coil holder.



11. When installing the unit, do not allow it to tilt. If you begin to feel increased resistance when tightening the bolts, this means that the processor unit is out of order and should be replaced. On some vehicles, the processor unit is installed on a ribbon spring, which should also be taken into account when tightening the bolts.

(Material copied from the portal www.opelbook.ru)