Jetta L4-1.9L DSL Turbo (BEW) (2004)
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Diesel MFI Pump: Testing and Inspection
Needle Lift Sensor, Checking
Needle Lift Sensor, Checking
The needle lift sensor signal is used to determine the start of injection. If it fails the start of injection is activated (RPM and load dependent), during
normal driving operation the start of injection is regulated (RPM, load and temperature dependent).
NOTE: When servicing terminals in the harness connector for the Needle Lift Sensor, use only gold-plated terminals.
Recommended special tools and equipment
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VAG1526 multimeter or VAG1715 multimeter
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VAG1594 connector test kit
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Wiring diagram
Test requirement
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The respective fuses of Diesel-Direct fuel injection system must be OK.
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Battery voltage must be at least 11.5 Volts.
Test sequence
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Disconnect 2-pin harness connector for needle lift sensor (arrow).
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Measure resistance between sensor terminals.
