Engine Control Module -J623- WITH PROTECTIVE HOUSING, REMOVING AND INSTALLING: Removing

-- If the Engine Control Module -J623- is to be replaced, the adaptation values must be read and saved before removing the Engine Control Module -J623-.

-- Connect the Vehicle Diagnostic Tester => .

-- Select Diagnostic  operating mode and Start diagnostics  .

-- Select the Select individual test  tab and select the following tree structure consecutively:

• Drivetrain 
• Select the engine code and engine 
• 01 - OBD-capable systems  .
• 01 - Engine Electronics 
• 01 - Engine electronics, functions 
• 01 - Replacing engine control module or particulate filter 

-- Switch off the ignition after saving the file with the adaption values and remove the key.

• If the injector adaptation values from the faulty engine control unit are no longer readable, they must be manually entered and adapted in the new engine control module.

-- Turn off the ignition and remove the ignition key.

-- Remove the battery. Refer to BATTERY, REMOVING AND INSTALLING .

Remove the shear bolts -arrows- to remove the protective housing -1- as follows:

-- Use a mini-grinder -2- to make a slit in the head of the shear bolt -1- for a screwdriver.

-- To remove the bolts warm the threads using the hot air gun.

-- Set the adjustment on the heat gun as shown, with the temperature potentiometer -2- set to maximum heat and the two-stage airflow switch -3- set to level 3.

-- Warm the head of the shear bolt -1- for approximately 20 to 30 seconds.

-- Remove the shear bolt -1- with a screwdriver -2-.

-- Remove the protective housing from the Engine Control Module -J623-.

-- Release the retainer -arrow A- and remove the Engine Control Module -J623- -arrow B-.

Courtesy of AUDI OF AMERICA, LLC

-- Release and disconnect the connectors for the Engine Control Module -J623-.