S4 Quattro Wagon V8-4.2L (BHF) (2008)
Repeat the previous steps for the second shear bolt.
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Remove the protective housing from the Motronic Engine Control Module (ECM) (J623).
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Remove the front electrical harness connector - 1 - and - 2 - from the Motronic Engine Control Module (ECM) ( J623).
Motronic Engine Control Module (ECM) ( J623) installation
Installation is performed in reverse order of removal. Note the following:
The Motronic Engine Control Module (ECM) (J623) must be installed with the protective housing.
Use New shear bolts when installing the Motronic Engine Control Module (ECM) (J623).
Motronic Engine Control Module (ECM) ( J623) reprogramming
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The new Engine Control Module (ECM) (J623) and immobilizer must be activated.
Final procedures
After repair work, the following work steps must be performed in the following sequence:
1. Check the DTC memory. Refer to => [ Diagnostic Mode 03 - Read DTC Memory ] See: Computers and Control Systems/Testing and
Inspection/Scan Tool Testing and Procedures/Diagnostic Mode 03 - Read DTC Memory.
2. If necessary, erase the DTC memory. Refer to => [ Diagnostic Mode 04 - Erase DTC Memory ] See: Computers and Control Systems/Testing and
Inspection/Scan Tool Testing and Procedures/Diagnostic Mode 04 - Erase DTC Memory.
3. If the DTC memory was erased, generate readiness code. Refer to => [ Readiness Code ] See: Computers and Control Systems/Testing and
Inspection/Monitors, Trips, Drive Cycles and Readiness Codes.