A4 Cabriolet L4-1.8L Turbo (AMB) (2005)
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Disconnect hoses from secondary Air Injection (AIR) solenoid valve -N112- -2-, but leave electrical connector connected.
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Installation location: under intake manifold
NOTE: Illustration shows removed intake manifold viewed from below.
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Connect test hose to valve connection marked with an arrow.
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Start output Diagnostic Test Mode and actuate Secondary Air Injection (AIR) solenoid valve -N112-.
Output Diagnostic Test Mode ->
Secondary Air Injection solenoid valve -N112
Indicated on display
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Valve must click...
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...and must open and close (can be checked by blowing into test hose).
If valve does not click:
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Check internal resistance of valve.
If valve does not open or close properly:
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Replace Secondary Air Injection (AIR) solenoid valve -N112-.
Checking internal resistance
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Disconnect connector at Secondary Air Injection (AIR) solenoid valve -N112- -2-.