Overview - Control Module With Hydraulic Unit

Fig 1: ABS Hydraulic Unit With ABS Control Module Assembly Overview

Courtesy of AUDI OF AMERICA, LLC

ABS Hydraulic Unit -N55- with ABS Control Module -J104-
- Component location: in the engine compartment.
- ABS Control Module -J104- WITH ABS Hydraulic Unit -N55-, REMOVING AND INSTALLING .
- The hydraulic control unit consists of ABS Hydraulic Unit -N55- with integrated Brake Pressure Sensor 1 -G201- and the ABS Control Module -J104-.
- Do not disconnect the connector before successfully completing OBD.
- Switch the ignition off before disconnecting the connector.
  NOTE:
  The hydraulic unit must not idle, otherwise this can lead to problems when bleeding the brake system.
  
  A new hydraulic unit is prefilled for the service with the brake fluid.
  
  All openings of the hydraulic unit must be closed when installing.
- Refer to NOTES FOR ABS Control Module -J104-
Bracket
- cannot be removed.
Connector
- For the ABS Control Module -J104-
- Refer to NOTES FOR ABS Control Module -J104-
Brake Line
- To the brake master cylinder
- Tightening Specification
Brake Line
- To the brake master cylinder
- Tightening Specification
Brake Lines
- Hydraulic Unit to Right Front Brake Caliper
- Hydraulic Unit to Left Front Brake Caliper
- Hydraulic Unit to Left Rear Brake Caliper
- Hydraulic Unit to Right Rear Brake Caliper
  WARNING:
  Do not bend the brake lines past their form or damage them.
  
  A bent or damaged brake line must be replaced.