GTI L4-2.0L Turbo (BPY) (2007)
Fuel Injector: Testing and Inspection
Fuel Injectors N30, N31, N32, N33, Checking
The following test procedure is used to diagnose all fuel injectors.
Special tools, testers and auxiliary items required
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Multimeter.
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Diode test lamp (12 V).
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Wiring diagram.
Test requirements
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The Fuel Injectors N30, N31, N32, N33 fuses OK.
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The Engine Speed (RPM) Sensor G28 OK, checking. See: Computers and Control Systems/Engine Speed Sensor/Testing and Inspection
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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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Vehicles with automatic transmission, shift selector lever into 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.
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Observe safety precautions.
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Observe rules for cleanliness.
Procedure
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Remove the engine cover with air filter.
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Disconnect the Fuel Injector electrical harness connectors from Fuel Injectors N30, N31, N32, N33.
Checking internal resistance
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Using a multimeter, check the Fuel Injector electrical terminals 1 to 2 for resistance.
Specified value: 12.0 to 20.0 Ohm (at approx. 20 degrees C)
If the specified value was not obtained:
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Replace the malfunctioning Fuel Injector.
If the specified value was obtained: