volkswagen Workshop Repair Guides

Volkswagen Workshop Service and Repair Manuals

Wastegate Bypass Regulator Valve, Checking|Page 6215 > < Throttle Position (TP) Sensor G79|Page 6209
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Air Bypass Valve: Testing and Inspection
Wastegate Bypass Regulator Valve, Checking

Wastegate Bypass Regulator Valve, Checking

Special tools, testers and auxiliary items required

‹› Multimeter.

‹› Wiring diagram.

Test requirements

‹›  The Diesel Direct Fuel Injection (DFI) Engine Control Module (ECM) (J248) fuses OK.

‹› Battery voltage at least 12.5 volts.

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

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

‹› A/C switched off.

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

‹› Ignition switched off.

Test procedure

-

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

Start diagnosis

-

Disconnect the Wastegate Bypass Regulator Valve ( N75) electrical harness connector- 2 -.

Checking internal resistance

-

Using a multimeter, check the Wastegate Bypass Regulator Valve (N75) - 1 - terminals 1 to 2 for resistance.

Specified value: 20 to 30 ohms (at approx. 20° C)

If the specification was not obtained:

-

Replace the Wastegate Bypass Regulator Valve ( N75).

If the specification is obtained:

Wastegate Bypass Regulator Valve, Checking|Page 6215 > < Throttle Position (TP) Sensor G79|Page 6209