Passat L4-1.8L Turbo (AWM) (2004)
Wastegate Actuator: Testing and Inspection
Vacuum Diaphragm For Wastegate Bypass Regulator Valve, Checking
Not Available For Manufacturer's Scan Tool
The manufacturer does not provide this procedure using a generic scan tool.
With Generic Scan Tool
Vacuum Diaphragm For Wastegate Bypass Regulator Valve, Checking
Recommended special tools and equipment e.g.:
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VAG1526 multimeter orVAG1715 multimeter
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VAG1594 connector test kit
Test requirement
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Coolant temperature must be at least 80 degrees C, Diagnostic mode 1: Check measuring values; PID 5, Coolant temperature. See: Computers and
Control Systems/Testing and Inspection/Scan Tool Testing and Procedures/With Generic Scan Tool/Diagnostic Mode 1: Check Measuring Values
Test sequence
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Disconnect connector -2- at Wastegate Bypass Regulator Valve -N75-.
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Start engine and increase speed to maximum RPM by depressing accelerator pedal suddenly. Operating rod -2- for wastegate bypass regulator
valve must move.
If operating rod does not move:
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Check lever for wastegate bypass regulator valve -1- for ease of movement. If rusted solid, replace turbocharger.
If operating rod does not move despite freely moving lever:
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Check Wastegate Bypass Regulator Valve -N75-. (Throughput in hose from turbocharger via valve to vacuum diaphragm with connector
disconnected). See:
If solenoid valve is OK:
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Replace turbocharger