New Beetle L4-2.0L (AZG) (2003)
Test sequence
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Remove right rear wheel housing liner.
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Disconnect 3-pin harness connector from Leak Detection Pump (LDP) -V1 44- -arrow-.
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Connect VAG1527 B Voltage Tester between connector terminal 3 (Battery Plus) and engine Ground.
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Start engine and run at idling speed
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LED must light up.
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Switch ignition off.
If LED does not light up
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Check wire for open circuit between connector terminal 3 and relay panel using wiring diagram
=>Electrical Wiring Diagrams, Troubleshooting & Component Locations
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Wire resistance: max. 1.5 Ohms
If LED lights (supply voltage OK):
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Remove inner plenum chamber cover, left.
Only Engine Code AEG:
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Connect test box VAG1598/22 to ECM wiring harness.
Engine Codes AVH, AZG: