A4 V6-3.0L (AVK) (2004)
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Pry off Engine Control Module (ECM) retaining bracket (arrows) using a screwdriver and set control module aside.
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If installed, unclip Transmission Control Module (TCM) retaining bracket and set control module aside.
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Disconnect power supply relay -2-.
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Check the following wire connection for open circuit according to wiring diagram:
Relay carrier in E-box, plenum
Harness connector at
chamber, position 2
ignition coils
Terminal
Terminal
8
1
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Specified value: Wire resistance max 1.5 Ohm
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If necessary, repair wire connection.
If no malfunctions are found in wires:
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Check voltage supply of Motronic Engine Control Module (ECM) power supply relay -J271-.
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Check activation of Motronic Engine Control Module (ECM) power supply relay -J271-.
Checking voltage supply