TT Coupe L4-1.8L Turbo (AWP) (2005)
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Connect multimeter (voltage measurement range) as follows:
Relay carrier below cover
Measure against
on left side of bulkhead
Contact
5
Battery positive
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Switch on ignition.
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Specification: approx. battery voltage
If the specification is not attained:
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Switch off ignition.
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Connect test box VAG 1598/31 to wiring harness for engine control module. Do not connect to the engine control module itself.
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Test for open circuit and short to positive or Ground in the following wiring connections:
Relay carrier below cover
Test box VAG 1598/31
on left side of bulkhead
Socket
Contact
5
21
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Correct any open/short circuit as necessary.
If no malfunction is found:
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Install a new motronic engine control module (ECM) power supply relay -J271-.