Jetta GLS L4-1.9L DSL Turbo (ALH) (2001)
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Measure voltage supply for changeover valve between the terminals of the connector.
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Start engine and run at idling speed.
Specification: 5.0 - 6.0 V
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Switch ignition off.
Voltage value must increase to 11.0 - 15.0 Volts (battery voltage) and after approx. 3 seconds fall to 0.0 Volts
If the voltage values do not change as described:
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Remove wiper arms and plenum cover.
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Connect test box VAG 1598/22 (through my 1999) or VAG 1598/31 (from my 2000) to control module wiring harness.
