volkswagen Workshop Repair Guides

Volkswagen Workshop Service and Repair Manuals

Air Bypass Valve Solenoid, Turbocharger|Testing and Inspection|Page 3268 > < Throttle Position Sensor|Testing and Inspection|Page 3262
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Air Bypass Valve Solenoid: Testing and Inspection

Turbocharger Recirculating Valve, Checking

Special tools, testers and auxiliary items required

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multimeter.

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Wiring diagram.

Test requirements

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The Motronic Engine Control Module (ECM) J623 fuses OK.

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Battery voltage at least 12.5 volts.

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All electrical consumers such as, lights and rear window defroster, switched off.

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On vehicles with automatic transmission, selector lever in position "P" or "N".

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A/C switched off.

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Ground (GND) connections between engine/transmission/chassis OK.

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Ignition switched off.

Test procedure

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Perform a preliminary check to verify the customers complaint.  See: Computers and Control Systems/Testing and Inspection/Scan Tool Testing
and Procedures/Preliminary Check

Start diagnosis

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Lift the vehicle on a hoist to access the turbocharger recirculating valve connector.

Checking internal resistance

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Disconnect the Turbocharger Recirculating Valve N249 electrical harness connector - 2 -.

Air Bypass Valve Solenoid, Turbocharger|Testing and Inspection|Page 3268 > < Throttle Position Sensor|Testing and Inspection|Page 3262