Beetle L4-2.0L (AEG) (2000)
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Disconnect 5-pin harness connector -1- from Mass Air Flow sensor -2-.
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Connect multimeter using aux. cables from VW 1594 to measure voltage at terminal 2 (connector to ECM).
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Start engine and run at idle.
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Measure voltage between terminal 2 and body ground.
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Specification: 11.5 Volts minimum
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Switch OFF ignition.
If specification not obtained:
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Check wiring connections from terminal 2 to fuse relay panel using Wiring diagram
Mass Air Flow sensor signal wire, checking
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Connect VAG 1598/22 Test Box to Control Module wiring harness.