Beetle L4-2.0L (AEG) (2000)
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Check wiring for open circuit between test box and 3-pin harness connector using wiring diagram.
Only engine code AEG:
Contact 1 + socket 37
Contact 2 + socket 16
Engine codes AVH, AZG:
Contact 1 + socket 80
Contact 2 + socket 25
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Resistance: max. 1.5 Ohms
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Additionally check wires for short to one another.
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Specification: Infinity Ohms
If no wiring malfunction is detected and voltage was present between contact 3 and ground is OK:
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Replace Leak Detection Pump (LDP) V144.
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Read out Readiness code:
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Readiness code must be reset if ECM is subject to low voltage with ignition ON or if DTC memory was erased.
Resistance testing
Test sequence
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Remove left rear wheel housing liner
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Disconnect 3-pin harness connector from Leak Detection Pump (LDP) V144 -arrow-.
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Set hand multimeter VAG1526 to measure resistance.