Checking activation

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Switch ignition off and on again.

Fig 1: After-Run Coolant Pump V51 Connector

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Connect diode test lamp VAG 1527 B to disconnected connector for After-Run Coolant pump V51 with adapter cables from VAG 1594 A. LED must light up.

NOTE:

This check must be performed within 10 minutes after switching ignition off.

If the LED does not light up:

Locate and eliminate open circuit referring to wiring diagram: → Electrical Wiring Diagrams, Troubleshooting and Component Locations