TT Quattro Coupe L4-1.8L Turbo (AWP) (2001)
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Connect VAG 1527 B voltage tester as follows:
Connector
Measure against
Contact
1
Body Ground
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Switch on ignition.
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The LED should light up.
If the LED does not light up:
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Test for open circuit in wiring connection between connector terminal 1 to fuse:
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Correct any open circuit as necessary.
If the LED lights up:
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Test activation.
Checking activation
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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. See: Testing and
Inspection/Scan Tool Testing and Procedures/Scan Tool Testing/With Manufacturer's Scan Tool/Scan Tool Connecting and Initial Checks/Wiring
and Component Testing Using VAG1598/31 Test Box
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Test for open circuit and short to positive or Ground in the following wiring connections:
Connector
Test box VAG 1598/31
Contact
Socket
2
39
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Correct short circuit or open circuit if necessary.