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Fuel Injector Leakage, Injection Quantity and Spray Pattern|Page 5434 > < How to Find Wiring Diagrams|Page 5431
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Fuel Injector: Testing and Inspection
Fuel Injector Leakage, Injection Quantity and Spray Pattern

Injection Quantity, Proper Seal And Spray Pattern Of Fuel Injectors, Checking

Special tools and equipment

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VAG1348/3-2

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VAG1348/3A

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VAG1594A

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VAG1602

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VAS5051 with VAG5051/1

or

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VAG1551 with VAG1551/3B

Test requirement:

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Fuel pressure OK, checking. See: Computers and Control Systems/Testing and Inspection/Component Tests and General Diagnostics/System
Pressure, Fuel Pressure Regulator and Holding Pressure

Test sequence

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Remove fuel rail including fuel injectors from intake manifold. Fuel lines remain connected.

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Connect VAG1598/31 test box at wiring harness to ECM, do not connect ECM. See: Computers and Control Systems/Testing and Inspection/Scan
Tool Testing and Procedures/Scan Tool Testing/Scan Tool Connecting and Initial Checks/Wiring and Component Testing Using VAG1598/31
Test Box

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Bridge terminals 1 and 65 at test box using adapter cables from VAG1594A connector test kit (this step supplies Ground (GND) to one side of
relay coil for Fuel Pump (FP) relay).

Fuel Injector Leakage, Injection Quantity and Spray Pattern|Page 5434 > < How to Find Wiring Diagrams|Page 5431