Overview - Control Module And Hydraulic Unit

Control Module and Hydraulic Unit 

Fig 1: Control Module And Hydraulic Unit

Courtesy of AUDI OF AMERICA, LLC

1. Bracket
2. Nut
   • 20 Nm
3. Rubber Insulation
4. Bracket
5. ABS Hydraulic Unit -N55-
   • Removing and installing. Refer to ABS Control Module -J104- /ABS Hydraulic Unit -N55-, REMOVING AND INSTALLING .
6. ABS Control Module -J104-
   • Do not disconnect connector before successfully completing On Board Diagnostic (OBD). Switch ignition off before separating connector
   • Removing and installing. Refer to ABS Control Module -J104- /ABS Hydraulic Unit -N55-, REMOVING AND INSTALLING .
   • Control module, separating from hydraulic unit. Refer to CONTROL MODULE, SEPARATING FROM HYDRAULIC UNIT .
   • Control module, attaching to hydraulic unit. Refer to CONTROL MODULE, ATTACHING TO HYDRAULIC UNIT .
7. Brake Line
   • 14 Nm
   • From brake master cylinder to the hydraulic unit
   • Identification: 5.25 mm diameter and union bolt with thread M12 x 1
8. Brake Line
   • 14 Nm
   • From brake master cylinder to the hydraulic unit
   • Identification: 6 mm diameter and union bolt with thread M12x1
9. TORX^® Bolt
   • Install the new TORX^® bolts in two steps switching back and forth.
   • Step 1: temporary tightening specification: 1 Nm to 1.5 Nm (to install the seal)
   • Step 2: final tightening specification: 2.5 Nm
10. Heat Shield
    • There are different versions. Refer to the Parts Information for the allocation.
    • Threaded version. Refer to Fig 2.
11. TORX^® Bolt
    • 8 Nm

Heat Shield - Threaded Version 

Fig 2: Heat Shield - Threaded Version

Courtesy of AUDI OF AMERICA, LLC

• Replace the self-locking nut after removing.

-- Tighten the nut -1- to 8 Nm.

-- Press on the bracket with the lock washer -3- all the way.

ABS Control Module -J104- 

Fig 3: Identifying Pressure Sensor Contact, Pressure Sensor, Seal, Valve Bodies And Pump Motor Contact

Courtesy of AUDI OF AMERICA, LLC

1. Pressure Sensor Contact
   • 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
5. Pump Motor Contact
   • Must not be damaged or bent