Jetta L4-2.0L (BEV) (2004)
Air Injection Control Valve: Testing and Inspection
Combination Valve, Checking - II
Combination Valve, Checking
Recommended special tools and equipment
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VAG1390 Hand vacuum pump
Requirements
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Pressure hose for Secondary Air Injection (AIR) pump motor not clogged or kinked
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No leaks in vacuum lines or hose connections.
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Vacuum lines are not blocked or kinked (vehicles with engine code AEG).
Work sequence (vehicles with engine code AEG)
NOTE: Do not use pressurized air for the following test.
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Remove front sound insulation.
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Disconnect vacuum hose -1- from combination valve at Secondary Air Injection (AIR) solenoid valve -N112- -2-.
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Connect hand vacuum pump (V.A.G 1390) at vacuum hose -1- to combination valve.
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Disconnect pressure hose at Secondary Air Injection (AIR) pump motor (arrow) and blow into it with light pressure.
Combination valve must close.
NOTE: To disengage, compress the buttons at the hose coupling.
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Operate vacuum pump.
Combination valve must open.
If the combination valve does not open or it is constantly open:
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Replace combination valve.
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Erase DTC memory of Engine Control Module (ECM), Diagnostic mode 4: Reset/erase diagnostic data. See: Computers and Control
Systems/Testing and Inspection/Scan Tool Testing and Procedures/With Generic Scan Tool/Diagnostic Mode 4: Reset/Erase Diagnostic Data
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Generate readiness code. See: Computers and Control Systems/Testing and Inspection/Monitors, Trips, Drive Cycles and Readiness Codes.
Work sequence (vehicles with engine code AVH, AZG, BEV, BBW)
NOTE: Do not use pressurized air for the following test.
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Remove front sound insulation.