Work sequence

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Disconnect electrical connector from Coolant Fan Control (FC) Thermal Switch F18.

Fig 1: Coolant Fan Control Thermal Switch 3-Pin Connector -- Connector Type A

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Use auxiliary cables from Auxiliary measuring tool set VAG 1594 A to bypass contact - 1 - and contact - 2 - of connector.

Stage 1 of coolant fans Coolant Fan V7 and Right coolant fan V35 should start.

Switch ignition on.
Use auxiliary cables from Auxiliary measuring tool set VAG 1594 A to bypass contact - 2 - and contact - 3 - of connector.

Stage 2 of coolant fans Coolant Fan V7 and Right coolant fan V35 should start.

If Stage 1 or 2 of the fans does not start:

Use wiring diagram to find and repair open circuit: Refer to Electrical Wiring Diagrams, Troubleshooting and Component Locations

If no open circuit could be found:

Replace Coolant Fan V7 or Right coolant fan V35 , respectively.