A4 Quattro Wagon V6-3.0L (AVK) (2002)
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Perform following tests (marked with dots).
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Check the wiring of relay carrier, electronics box, plenum chamber, position 2, terminal 8, to connector of ignition coil terminal 1.
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Check power supply relay for Motronic Engine Control Module (ECM) power supply relay -J271-.
Checking Actuation Of Power Output Stages
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Connectors disconnected from ignition coils.
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Disconnect connectors from all injectors.
NOTE: It is important to make sure that no fuel is injected during the test, as this would damage the catalytic converter. The connectors on the injectors
must be disconnected.
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Connect voltage tester VAG1527 B to terminals 2 and 3 of connector.
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Operate starter briefly.
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LED test light should flash (very brief flashes).
If LED does not flash:
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Connect test box VAG1598/31 to wiring harness for engine control module; do not connect engine control module. See: Computers and Control
Systems/Testing and Inspection/Scan Tool Testing and Procedures/Scan Tool Testing/Scan Tool Connecting and Initial Checks/Wiring and
Component Testing Using VAG1598/31 Test Box
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Check for open circuit and short to positive or ground in following wiring connections:
Connector
Test box VAG 1598/31
terminal
Socket
3 (cyl. 1)
102
3 (cyl. 2)
110
3 (cyl. 3)
94
3 (cyl. 4)
103
3 (cyl. 5)
111
3 (cyl. 6)
95
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Repair any open/short circuit as necessary.
If no wiring malfunction is detected:
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Replace common component ignition coil with power output stage.