Jetta GLS L4-2.0L (AVH) (2001)
Engine code AEG:
Contact 1 + socket 37
Contact 2 + socket 16
Resistance: max. 1.5 Ohms
Engine codes AVH, AZG:
Contact 1 + socket 80
Contact 2 + socket 25
Resistance: max. 1.5 Ohms
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Check wires for short to one another or ground
Specification: Infinity Ohms
If no fault in wiring is found and voltage between contact 3 and ground is OK:
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Replace Leak Detection Pump (LDP) -V144- (item 8)
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Display Readiness code See: Computers and Control Systems/Testing and Inspection/Monitors, Trips, Drive Cycles and Readiness Codes
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Readiness code must be reset if ECM is subject to low voltage with ignition ON or if DTC memory is erased.
Resistance testing
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) -V144- (arrow).
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Switch Fluke 83 multimeter to resistance range.
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Connect Fluke 83 multimeter between terminals 1 and 3 of Leak Detection Pump -V144- and measure resistance.
Specification: 640 to 720 Ohms
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Connect Fluke 83 multimeter between terminals 2 and 3 of Leak Detection Pump -V144- and measure resistance.
Specification: 12.5 to 19.5 Ohms