Beetle L4-2.0L (AEG) (2000)
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Start engine and let run at idle.
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Wait until pressure has risen, and then switch off ignition. Simultaneously close shut-off valve of pressure gauge (lever perpendicular to direction
of flow -arrow-).
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Observe pressure drop on pressure gauge.
If pressure does not drop:
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Test check-valve of Fuel Pump (FP). See: Fuel Pump/Testing and Inspection
If pressure does drop again:
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Open stop valve of pressure gauge (lever in direction of flow -arrow-).
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Start engine and let run at idle.
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Wait until pressure has risen, and then switch off ignition. Simultaneously pinch return hose tightly together.
If pressure does not drop:
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Replace fuel pressure regulator, item 1.
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Erase DTC memory of Engine Control Module (ECM), Diagnostic mode 4: Reset/erase diagnostic data.
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Generate readiness code. See: Computers and Control Systems/Testing and Inspection/Monitors, Trips, Drive Cycles and Readiness Codes
If pressure does drop again:
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Check whether line connections, O-rings in fuel distributor, and fuel injectors are properly sealed.
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Check pressure gauge for proper seal.
NOTE: Before removing pressure gauge, place absorbent rags around line connection which is to be disconnected and remove fuse 28 from fuse holder
again.
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Erase DTC memory of Engine Control Module (ECM), Diagnostic mode 4: Reset/erase diagnostic data.
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Generate readiness code. See: Computers and Control Systems/Testing and Inspection/Monitors, Trips, Drive Cycles and Readiness Codes
Test sequence (Vehicles with engine code BDC)
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Remove fuse 28 from fuse holder.
NOTE: By removing fuse 28, the voltage supply for the Fuel Pump (FP) is interrupted for safety reasons, otherwise the Fuel Pump (FP) would start up
when the driver's door is opened.