Golf GL L4-2.0L (AEG) (2001)
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Disconnect 2-pin connector from secondary air inlet valve (arrow).
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Connect voltage tester VAG 1527B to the outer contacts of connector with auxiliary cables from V.A.G 1594C.
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start engine and run at idling speed.
The LED must light up.
LED lights up (voltage supply OK.):
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Replace secondary air inlet valve.
LED does not light up.
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Connect 2-pin connector
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Check activation of valve. See: Computers and Control Systems/Testing and Inspection/Scan Tool Testing and Procedures/With Manufacturer's
Scan Tool/Output Diagnostic Test Mode (DTM), (Function 03)
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Check wiring, refer to wiring diagrams
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Read DTC memory See: Computers and Control Systems/Testing and Inspection/Reading and Clearing Diagnostic Trouble Codes/Reading
Diagnostic Trouble Codes
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Read readiness code: See: Computers and Control Systems/Testing and Inspection/Monitors, Trips, Drive Cycles and Readiness Codes
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Generate readiness code again if DTC memory has been erased or engine control module was disconnected from permanent positive. See:
Computers and Control Systems/Testing and Inspection/Monitors, Trips, Drive Cycles and Readiness Codes