A4 V6-3.0L (AVK) (2004)
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Remove rear engine cover (arrows).
Checking internal resistance
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Disconnect harness connector from Secondary Air Injection (AIR) Solenoid Valve -N112- (arrow).
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Connect multimeter at valve for resistance measurement.
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Specified value: 25 ... 35 Ohm
If specified value is not obtained:
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Replace Secondary Air Injection (AIR) Solenoid Valve -N112-.
If specified value is obtained:
Checking voltage supply