Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

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HOMESERVICE MANUALSAUDI2005A6 3.2 TREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 13 (3.0L - ENGINE CONTROLS - FUEL INJECTION & IGNITION, ENGINE CODE(S): AVK, BGN)28 IGNITION/GLOW PLUG SYSTEMIGNITION SYSTEM, CHECKINGMOTRONIC ENGINE CONTROL MODULE (ECM) POWER SUPPLY RELAY -J271-, CHECKINGNOTES

2005 Audi A6 3.2 T

Motronic Engine Control Module (ECM) power supply relay -J271-, checking: Notes

2005 Audi A6 3.2 TSECTION Notes

WARNING: This page is about a different car, the 2006 Audi A4, 2005 Audi A4, 2004 Audi A4, 2003 Audi A4, and 2002 Audi A4. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Identifying Special Tools - Motronic Engine Control Module (ECM) Power Supply Relay -J271-, Checking

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Special tools and equipment

VAG1526 A
VAG1594 A
VAG1598/31

NOTE: The Motronic engine control module (ECM) power supply relay -J271- supplies the ignition coils with output stages as well as the engine control module on Pin 121 with power.

Test sequence

Fig 2: Removing Cover In Engine Compartment (Left Side)

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Disconnect cover -1- on left in engine compartment.

Fig 3: Removing Coolant Hoses

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Unbolt coolant expansion tank (arrow).
Disconnect electrical wiring to Engine Coolant Level (ECL) warning switch -F66- on bottom of expansion tank.
Lay coolant expansion tank with connected coolant hoses -1- to -3- aside.

Fig 4: Removing Bolts On Left Cylinder Head & Disconnecting 4-Pin Connectors On Ignition Coils

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Remove bolts (arrows) on left cylinder head.
Disconnect 4-pin connectors -4- to -6- on ignition coils.

NOTE: For further testing, the multimeter is attached to an ignition coil connector.

RENDER: 1.0x

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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.