Overview - Control Module And Hydraulic Unit

Control Module and Hydraulic Unit

Fig 1: Exploded View Of ABS Control Module And ABS Hydraulic Unit

Courtesy of AUDI

1. Nut
   • 3.8 Nm
2. Bracket
3. Nut
   • 3.8 Nm
4. Rubber Bushing
5. Mounting Bracket
6. Bolt
   • Tighten in two steps alternating from side to side.
   • Step 1: 1 to 1.5 Nm (to position the seal)
   • Step 2: 2.5 Nm
7. ABS Control Module -J104-
   • If the ABS Control Module -J104- is faulty, it can be replaced separately.
   • If the ABS Hydraulic Unit -N55- is faulty, it must be replaced together with the ABS Control Module -J104-.
   • Refer to ABS Control Module -J104- /ABS Hydraulic Unit -N55-, REMOVING AND INSTALLING 
   • Can be replaced separately if faulty.
   • Refer to CONTROL MODULE, SEPARATING FROM HYDRAULIC UNIT 
   • Refer to CONTROL MODULE, INSTALLING ON HYDRAULIC UNIT 
8. ABS Hydraulic Unit -N55-
   • If the ABS Control Module -J104- is faulty, it can be replaced separately.
   • If the ABS Hydraulic Unit -N55- is faulty, it must be replaced together with the ABS Control Module -J104-.
   • Refer to ABS Control Module -J104- /ABS Hydraulic Unit -N55-, REMOVING AND INSTALLING 
9. Brake Line
   • 14 Nm
   • To the brake caliper
   • 5.25 mm diameter and union bolt with M12x1 thread
10. Brake Line
    • 14 Nm
    • From brake master cylinder to the hydraulic unit
    • 6 mm diameter and union bolt with M12x1 thread
11. Bolt
    • 25 Nm
12. Bolt
    • 3.8 Nm

ABS Control Module -J104-

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

Courtesy of AUDI

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
   • Do not remove or lift
   • Cannot be replaced separately
4. Valve Body
   • Must not be damaged
   • Do not use any tools
5. Pump Motor Contact
   • Must not be damaged