Passat Sedan L4-2.0L Turbo (BPY) (2007)
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Exhaust Bypass Valve: Testing and Inspection
Wastegate Bypass Regulator Valve N75, Checking
Special tools, testers and auxiliary items required
‹› Multimeter.
‹› Wiring diagram.
Test requirements
‹› Fuse (SB32) OK.
‹› The Motronic Engine Control Module (ECM) Power Supply Relay 2 (J670) 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.
‹› Voltage for the Turbocharger Recirculating Valve (N249) is supplied by the Motronic Engine Control Module (ECM) Power Supply Relay 2
(J670).
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
-
Remove the engine cover with air filter.
Checking internal resistance
-
Disconnect the Wastegate Bypass Regulator Valve (N75) electrical harness connector- 1 -.
-
Using a multimeter, check the Wastegate Bypass Regulator Valve (N75) terminals 1 to 2 for resistance.
