TT Quattro Coupe L4-1.8L Turbo (BEA) (2003)
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Connect multimeter at valve for resistance measurement.
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Specification: 25 to 35 ohm
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If specified value is not obtained, replace Secondary Air Injection (AIR) solenoid valve -N112-.
Checking voltage supply
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Disconnect harness connector from Secondary Air Injection (AIR) valve -N112-.
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Connect VAG1527B voltage tester as follows:
Harness connector
Measure to
Terminal
1
Engine Ground (GND)
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Operate starter briefly (engine can also start).
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LED must light up.
If LED does not light up:
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Perform the following tests marked with dots:
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Check fuse S243 (in fuse holder, position 43).