TT Roadster L4-1.8L Turbo (AWP) (2003)
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Connect hand-held multimeter (voltage measurement range) between contacts 3 and 4 of connector.
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Specification: approx. 5 V
If the specification is not attained:
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Test the wiring.
Testing wiring for mass air flow sensor
NOTE: The wiring test also tests the signal wire.
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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: Computers
and Control Systems/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 VAG1598/31
Contact
Socket
3
27
4
53
5
29
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Correct short circuit or open circuit if necessary.
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Test all wires for short circuits with each other.
If the wiring is OK:
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Fit a new mass air flow (MAF) sensor -G70-.