Hydraulic Unit With Control Module, Removing And Installing, Hybrid Vehicles: Removing

WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2015 Audi S7, 2015 Audi RS 7, 2015 Audi A7 Quattro, 2014 Audi S7, and 2014 Audi RS 7. However, it is still accessible from the selected car via links, so may be relevant.

The DTC memory must be read with the Vehicle Diagnostic Tester before removing.

-- Connect the Vehicle Diagnostic Tester to the vehicle data link connector with the ignition switched off.

NOTE:

Switch the ignition on.

DTC memory interrogated, errors shown corrected and DTC memory erased.

-- Start the program in Guided Functions.

-- Turn off the ignition.

-- Insert the Brake Pedal Actuator VAG 1869/2 between the brake pedal and driver seat. Press the brake pedal 60 mm.

Fig 1: Brake Pedal Depressor VAG 1869/2 Inserted Between Brake Pedal And Driver's Seat

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-- Raise the vehicle.

-- Connect the bleeder bottle hose to the bleeder screws on the left front and left rear brake calipers and then open the bleed screw.

NOTE: This reduces the pressure in the hydraulic unit.

-- Close the left front and left rear bleed screw.

-- Lower vehicle.

-- Do not remove the Brake Pedal Actuator VAG 1869/2.

-- Remove the engine cover -arrows-.

Fig 2: Identifying Engine Cover

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WARNING: Follow the High Voltage System General Warnings.

-- Remove the screws -arrows- and remove the cover -2-.

Fig 3: Identifying Cover And Screws

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WARNING: Follow the High Voltage System General Warnings.

-- Open the retainers -arrow- and move the bracket with the electric wires to the rear.

Fig 4: Identifying Retainers

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-- Free up the wire -1-.

-- Remove the wires -2- from the Electric Drive Power and Control Electronics -JX1-.

-- Remove the coolant reservoir bolts.

-- Remove the coolant reservoir with the attached coolant hoses upward from the bracket.

-- Disconnect the connector from the coolant reservoir.

-- Tie to the side the coolant reservoir with attached hoses.

NOTE: Do not open the coolant hoses.

-- To protect against escaping brake fluid, place a lint-free rag in the area under the control module and hydraulic unit.

WARNING: When working with brake fluid, observe relevant safety precautions and notes. Refer to BRAKE FLUID .

-- Mark the brake lines.

-- Remove the brake lines from the mounts.

-- Remove all brake lines form the hydraulic unit -2-.

Fig 5: Identifying Hydraulic Unit And Control Module

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WARNING: Do not bend the brake lines near the hydraulic unit.

-- Seal brake lines and threaded holes with plugs from repair kit.

-- Disconnect the connector -1- from the control module -3-.

Fig 6: Identifying Hydraulic Unit And Control Module

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NOTE:

Make sure that no brake fluid enters control module connector housing. This could lead to corrosion of the contacts and thereby cause the system to fail.

Clean a dirty connector housing thoroughly with compressed air.

-- Remove the hydraulic unit and control module from the bracket.

-- Fasten the bracket from the hydraulic unit.

Refer to HYDRAULIC UNIT BRACKET, REMOVING AND INSTALLING, HYBRID VEHICLES

Replace the control module:

If the Vehicle Diagnostic Tester has determined that control module is faulty "Control Module Faulty".
if there is visible damage to the control module housing or to the connector

CAUTION: The pump motor may not be separated from the hydraulic unit.