Golf GLS L4-2.0L (AVH) (2002)
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VAG1594 connector test kit
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Wiring diagram
Test requirements
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The respective fuses of fuel injectors (N30 to N33) must be OK.
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Fuel Pump (FP) Relay -J17- must be OK, check.
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Battery voltage must be at least 11.5 volts.
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All electrical consumers like, for example, lights and rear window heating must be switched off.
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Parking brake must be engaged or else daylight driving lights will be switched on.
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For vehicles with automatic transmission, selector lever must be in position -P- or -N-.
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If vehicle is equipped with an A/C system, it must be switched off.
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Ground (GND) connections between engine and chassis must be OK.
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Engine speed (RPM) sensor must be OK, checking. See: Computers and Control Systems/Testing and Inspection/Component Tests and General
Diagnostics/Engine Speed (RPM) Sensor, Checking
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Ignition switched off.
Test sequence
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Remove upper part of intake manifold, Intake manifold, upper part, disassembling and assembling.
NOTE:
Seal the intake channels in lower part of intake manifold using a clean rag.
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Disconnect fuel injector connectors.
Resistance values of fuel injectors, checking
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Test resistance of fuel injectors between terminals. Specified value: 14 ... 18 Ohms
NOTE:
Resistance value is valid at approx. 20°C. At higher temperatures, resistance value increases.
If specified value is not obtained:
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Replace malfunctioning fuel injector, item 7.
Note the following when installing the fuel injectors:
Replace O-rings on all fuel injectors and wet them slightly with clean motor oil.
Insert fuel injectors into fuel rail perpendicular and in the right position, and secure them with retaining clips.
Position fuel distributor on lower part of intake manifold using secured fuel injectors and apply uniform pressure to press it in.
The connectors must audibly engage on valves when attached.