volkswagen Workshop Repair Guides

Volkswagen Workshop Service and Repair Manuals

Fuel Injectors For Injection Quantity and Proper Seal, Checking|Page 5131 > < Fuel Injectors For Injection Quantity and Proper Seal, Checking|Page 5129
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Connect diode test lamp to connector of fuel injector to be tested terminal 1 and Ground (GND).

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Operate starter and test voltage supply for fuel injector.
LED must light up.

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Switch ignition off.

If LED does not light up:

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Check wire between 2-pin connector terminal 1 and the Fuel Pump (FP) Relay -J17- for open circuit according to wiring diagram.
Wire resistance: max: 1.5 Ohms

Activation and voltage supply, checking

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Connect diode test lamp to the connector terminals of the fuel injector to be checked.

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Operate starter and test activation of fuel injector.
LED should flicker.

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Switch ignition off.

If LED does not flicker:

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Connect test box to control module wiring harness, connect test box for wiring test. See: Computers and Control Systems/Testing and
Inspection/Reading and Clearing Diagnostic Trouble Codes/Scan Tool Connecting/With Generic Scan Tool/Test Box, Connecting For Wiring
Test

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Check wires between test box and 2-pin connector for open circuit according to wiring diagram.
Wire resistance: max: 1.5 Ohms

Fuel Injectors For Injection Quantity and Proper Seal, Checking|Page 5131 > < Fuel Injectors For Injection Quantity and Proper Seal, Checking|Page 5129