Jetta GLS L4-1.8L Turbo (AWD) (2001)
Fuel Injector: Testing and Inspection
Injectors, Checking
Special tools and equipment
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Scan tool VAG 1551 or vehicle system tester VAG 1552 with cable VAG 1551/3
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Test box VAG 1598/31
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Hand multimeter VAG 1526 or multimeter VAG 1715
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VAG 1527B Voltage tester
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Adapter set VAG 1594
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Wiring diagram
Check conditions
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Engine speed (RPM) sensor must be OK, checking. See: Computers and Control Systems/Engine Speed Sensor/Testing and Inspection
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Fuel pump relay must be OK
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Fuses 28 and 32 must be OK.
Test sequence
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First check the activation of the injectors via Output Diagnostic Test Mode. Refer to "Scan Tool Testing/Output Diagnostic Test Mode (DTM)
Initiating" See: Computers and Control Systems/Testing and Inspection
If one or more injectors do not click:
Checking resistance of injectors
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Check resistance of injectors between contacts.
Specification: 12 - 17 ohms