Passat Wagon L4-1.9L DSL Turbo (AHU) (1997)
Fuel Injector: Testing and Inspection
The Needle Lift sensor signal determines start of injection. If it fails, start of injection switches to open-loop control based on engine speed and load.
During normal operation, start of injection is controlled in a closed-loop based on engine speed, load and temperature.
Special Tools, Testers And Auxiliary Items:
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Test Box VAG 1598/18
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Hand multimeter VAG 1526 or multimeter VAG 1715
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VW 1594 adaptor kit
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Wiring diagram
Test Sequence:
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Switch OFF ignition
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Disconnect connector -1- for Needle Lift sensor
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Measure resistance between connector terminals
Specification: 80 to 120 Ohms
If specification not obtained:
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Replace cyl. 3 injector with Needle Lift sensor G80
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Display the readiness code
If DTC memory was erased:
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Create readiness code again
If specification obtained:
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Connect Test Box VAG 1598/18 to ECM harness connector
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Check wiring for open circuit between Test Box and connector using wiring diagram:
terminal 1 + socket 12
terminal 2 + socket 11
Wire resistance: max. 1.5 Ohms