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Evaporative Emission Control Canister > < How to Find Wiring Diagrams|Page 5770
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Check for short to Ground in following wiring:

2-pin connector at wiring

Test box V.A.G 1598/31,

harness, socket

socket 

2

64

If diode test lamp does not flash:

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Check for short to positive/open circuit in following wiring.

2-pin connector at wiring

Test box V.A.G 1598/31,

harness, socket

socket 

2

64

Resistance: max. 1.5 Ohm 

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Eliminate Ground connection/open circuit in wiring if necessary.

If there is neither an open circuit in the wiring nor a short circuit:

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Replace Motronic Engine Control Module (ECM) -J220-.

Evaporative Emission Control Canister > < How to Find Wiring Diagrams|Page 5770