TT Quattro Roadster V6-3.2L (BHE) (2005)
Fuel Injector: Testing and Inspection
Fuel Injectors, Testing
Fuel Injectors, Checking
Special tools, testers and auxiliary items required
-
Multimeter.
-
Diode test lamp (12 V).
-
Wiring diagram.
Test requirements
-
Fuel Injector Fuse OK.
-
Motronic Engine Control Module (ECM) J220 Fuse OK.
-
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.
-
Vehicles with automatic transmission, shift selector lever into position "P" or "N".
-
A/C switched off.
-
Ground (GND) connections between engine/transmission/chassis OK.
-
Ignition switched off.
-
Observe safety precautions.
-
Observe rules for cleanliness.
Test procedure
-
Perform a preliminary check to verify the customers complaint. See: Computers and Control Systems/Testing and Inspection/Scan Tool Testing
and Procedures/General Diagnosis
Start diagnosis
-
Remove the Fuel Injector electrical harness retaining screws - arrows -.
-
Remove the Fuel Injector electrical harness - arrows - from the fuel rail.
-
Disconnect the Fuel Injector electrical harness connectors -1,2,3,4,5,6 - from the Fuel Injectors.
Checking internal resistance