TT Coupe L4-1.8L Turbo (AWP) (2005)
Testing power supply to mass air flow sensor
Requirements for test:
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Fuse for mass air flow sensor OK
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Fuel pump relay OK. Testing.
NOTE: The mass air flow sensor receives its voltage supply via the fuel pump relay.
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Unplug connector from mass air flow sensor.
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Connect multimeter (voltage measurement range) as follows:
Connector Contact
Measure against
2
Engine Ground
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Operate the starter briefly. (The engine can be allowed to start.)
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Specification: approx. battery voltage
If the specification is not attained:
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Test for open circuit or short to Ground in wiring between fuel pump relay and contact 2 on connector via fuse.
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Correct short circuit or open circuit if necessary.