Overview - Control Module And Hydraulic Unit

ABS Control Module -J104- and ABS Hydraulic Unit -N55- 

Fig 1: Identifying Hydraulic Unit

Courtesy of AUDI OF AMERICA, LLC

1. Bolt
   • 4.5 Nm
2. ABS Control Module -J104-
   • Information for exchanging control modules, refer to CONTROL MODULE, SEPARATING FROM HYDRAULIC UNIT .
   • Control module, replacing, refer to ABS Control Module -J104- /ABS Hydraulic Unit -N55-, REMOVING AND INSTALLING .
3. Wiring Harness Connector
   • Do not disconnect the connector (47-pin) before successfully completing On Board Diagnostic (OBD).. Turn off the ignition before disconnecting the connector.
4. ABS Hydraulic Unit -N55-
   • Removing and installing, refer to ABS Control Module -J104- /ABS Hydraulic Unit -N55-, REMOVING AND INSTALLING .
     CAUTION:

     There is a risk of destroying the hydraulic unit.

     • The pump motor may not be separated from the ABS Hydraulic Unit -N55-.

ABS Control Module -J104-

Fig 2: Identifying Pressure Sensor Contact, Pressure Sensor, Seal, Valve Bodies And Pump Motor Contact

Courtesy of AUDI OF AMERICA, LLC

1. Pressure Sensor
   • Do not touch the contacts
   • The illustration depends on the model
2. Pressure Sensor
   • Must not be changed or damaged
   • Cannot be replaced
   • The illustration depends on the model
3. Seal
   • Must not be pulled out or raised up
   • Cannot be replaced
4. Valve Bodies
   • Must not be damaged or bent
   • Do not use any tools on the valve bodies
5. Pump Motor Contact
   • Must not be damaged or bent