ABS Control Module -J104-, REPLACING: Assembling
Use new bolts.
-- Clean the sealing surface on the hydraulic unit -2- with a plastic scraper -1-.
Be careful not to damage or bend the valve body -3-.
The sealing surface on the hydraulic unit must have a clean, even surface.
Replace the hydraulic unit if the sealing surface or contact tags are damaged.
The seal on the control module cannot be replaced.
The seal on the control module must not be pulled out or raised up.
Do not use aggressive cleaning agents (use cleaning agent enclosed).
Check sealing surface for damage (visual check).
Moisture and dirt particles must not enter the inside of the control module.
Do not use compressed air to clean the control module or hydraulic unit.
Strong vibrations (for example falls, impacts) can destroy the control module. Control module must then no longer be used.
-- Check the valve body inside the hydraulic unit for damage.
The hydraulic unit -4- with the pump motor and the connector -3- faces down.
-- Mount the control module on the hydraulic unit carefully from the top with the valve coils hanging.
-- Install the bolts (do not tighten) until the control module touches the hydraulic unit evenly.
-- Tighten the bolts diagonally.
Tightening specification 4.5 Nm
After tightening check
- if all the bolts have made contact,
- if the control module and hydraulic unit are touching all the way around.
Install the ABS Hydraulic Unit -N55- with ABS Control Module -J104-.
All Vehicles
| Component | - | Nm |
|---|---|---|
| Four hydraulic unit brake lines for brake caliper | 14 | |
| Hydraulic unit brake lines to master brake cylinder | 16 | |
-- Refer to BRAKE SYSTEM, BLEEDING
Start the program in Guided Functions on the Vehicle Diagnostic Tester if the control module is replaced.
-- Connect the Vehicle Diagnostic Tester to the vehicle data link connector with the ignition switched off.
Switch the ignition on.
DTC memory interrogated, errors shown corrected and DTC memory erased.
-- Start the program in Guided Functions.
After replacing the control module and bleeding the brake system
- All the ESP warning lamps must turn off.