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HOMESERVICE MANUALSAUDI2005A6 3.2 TREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 90 (5.2L - FUEL SYSTEM - ENGINE CODE(S): BXA)24 - FUEL INJECTION SYSTEMREMOVAL AND INSTALLATIONENGINE CONTROL MODULE 1, MASTERREMOVING
2005 Audi A6 3.2 T

Engine Control Module 1, Master: Removing

2005 Audi A6 3.2 TSECTION Removing
WARNING: This page is about a different car, the 2011 Audi S6, 2010 Audi S6, 2009 Audi S6, 2008 Audi S6, and 2007 Audi S6. However, it is still accessible from the selected car via links, so may be relevant.
  • Turn the ignition and remove the ignition key.
  • Remove rubber seal -1- and remove plenum chamber cover -2-.
    G06380997Courtesy of AUDI OF AMERICA, LLC
  • Carefully pull cowl grill only as far as necessary out of retainer on windshield.
  • Remove Engine Control Module (ECM) -J623- -2-.

Remove Engine Control Module (ECM) -J623-.

To increase the difficulty with which the ECM connectors can be accessed, the ECM is secured in a metal housing with retaining tabs and shear bolts.

GWWA10-10526Courtesy of AUDI OF AMERICA, LLC

The threads of the shear bolts -4- (that are not installed in ECM) are coated with a locking compound. For this reason, the threads must be heated with the heat gun to remove both bolts.

GW00014448Courtesy of AUDI OF AMERICA, LLC

The threads of both shear bolts -3- (that are installed in ECM) are not coated with a locking compound. The threads in the ECM housing must not be heated and do not require to be heated (unintentional heating of the ECM).

GW00014448Courtesy of AUDI OF AMERICA, LLC

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

GWWA24-0476Courtesy of AUDI OF AMERICA, LLC
WARNING: By heating the threads, the retaining tabs, shear bolts and parts of the metal housing become very hot. Do not burn yourself on this! Make sure that only the threads are heated as much as possible, and not any of the surrounding parts. Possibly cover these parts.

Warm threads on connector side of shear bolts as shown in illustration.

Switch on heat gun and heat the bolt for approximately 20 to 30 seconds.

GW00014446Courtesy of AUDI OF AMERICA, LLC
  • Remove shear bolts with locking pliers (see direction of -arrow-).
    GW00014447Courtesy of AUDI OF AMERICA, LLC
  • Both shear bolts that are screwed into the ECM do not require heating to be removed. They can be removed without heat.
  • Disconnect metal retainers from connectors.
  • Remove both retainer bolts from Engine Control Module (ECM) -J623-.
  • Disengage connector from Engine Control Module (ECM) - J623- and remove connector.
  • Remove used Engine Control Module (ECM) -J623- and connect new one.
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.