TT Quattro Coupe L4-1.8L Turbo (AWP) (2001)
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Connect VAG 1527 B voltage tester between contact 2 (Hall sender signal) and contact 1 (positive).
NOTE: The connector contacts are numbered on the back of the connector
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Operate starter for a few seconds.
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LED should flash
NOTE: The LEDs on voltage testers with a low current draw continue to glow faintly between impulses from the engine control module (rather than
going out completely) and become much brighter when receiving an impulse.
If the LED does not flash:
Checking voltage supply
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Unplug connector from Hall sender.
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Connect multimeter (voltage measurement range) as follows:
Connector
Measure against
Contact
1
Engine Ground
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Switch on ignition.
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Specification: approx. 5 V
Testing signal wire
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Connect multimeter (voltage measurement range) as follows:
Connector
Measure against
Contact
2
Engine Ground
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Switch on ignition.
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Specification: approx. battery voltage
Testing Ground wire