Golf L4-2.0L (AVH) (2003)
Fuel Injector: Testing and Inspection
Fuel Injectors, Check
With Manufacturer's Scan Tool
Fuel Injectors, Checking
Special tools and equipment
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V.A.G1551 scan tool (or VAG1552 mobile scan tool) with VAG1551/3 cable
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VAG1598/31 test box
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Multimeter Fluke 83 or equivalent
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VAG1527 voltage test lamp
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VAG1594 connector test kit
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Wiring diagram
Test requirements
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Engine speed (RPM) sensor must be OK, Refer to "Engine Speed (RPM) Sensor" See: Computers and Control Systems/Engine Speed
Sensor/Testing and Inspection
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Fuel Pump (FP) relay must be OK.
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All fuses must be OK.
Test sequence
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First, test activation of the fuel injectors via output Diagnostic Test Mode (DTM). See: Computers and Control Systems/Testing and
Inspection/Scan Tool Testing and Procedures/With Manufacturer's Scan Tool/Output Diagnostic Test Mode (DTM), (Function 03)
If one or more injectors do not click:
Checking voltage supply
NOTE: Upper part of intake manifold must be removed for electrical test of fuel injectors/wires from cylinder 2 and 3.
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Disconnect fuel injector connectors.