TT Roadster L4-2.0L Turbo (BPY) (2008)
Wastegate Actuator: Testing and Inspection
Wastegate Bypass Regulator Valve -N75-, Checking
Wastegate Bypass Regulator Valve N75, Checking
Special tools, testers and auxiliary items required
-
Multimeter.
-
Wiring diagram.
Test requirements
-
The Fuse SB12 OK.
-
The Motronic Engine Control Module (ECM) Power Supply Relay J271 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.
NOTE: Voltage for the Wastegate Bypass Regulator Valve N75 is supplied by the Motronic Engine Control Module (ECM) Power Supply Relay
J271.
Test procedure
-
Perform a preliminary check to verify the customers complaint.
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.
Specified value: 20 to 30 ohms (at approx. 20 degrees C)
If the specification was not obtained:
-
Replace the Wastegate Bypass Regulator Valve N75.