Coolant Line/Hose: Testing and Inspection

Coolant Fan, Checking

Special tools, testers and auxiliary items required

• Connector test set (VAG 1594 A)

• Wiring diagram

Prerequisites

• Main fuses must be OK.





• Coolant Fan Control (FC) Thermal Switch (F18) OK.

Sequence

- Disconnect the connector for the coolant FC thermal switch.

- Bridge terminals 1 and 2 of connector with adapter cables from (VAG 1594A).

Stage 1 of coolant fan (V7) must start up.

- Switch on the ignition.

- Bridge terminals 2 and 3 of connector with adapter cables from (VAG 1594A).

Stage 2 of coolant fan must start up.

If 1st or 2nd speeds of fans do not run:

- Locate and repair open circuit in wiring using wiring diagram.

If no fault is detected in the wiring:

- Replace the coolant fan.