Coolant After Run Pump, Checking

Coolant After Run Pump, Checking

Special tools, testers and auxiliary items required

• Voltage tester (VAG 1527B)

• Connector test set (VAG 1594C)

• Wiring diagram

Test Conditions

• The fuses must be OK.

Test Sequence

- Remove the noise insulation.

- Remove the 2 pin electrical connector from the after run coolant pump.

- Connect the contacts of the after run coolant pump to the battery, using adapter cables from the (VAG 1594C).





• After run coolant pump must run.

If the after run coolant pump does not start running:

- Replace the after run coolant pump.

If the after run coolant pump does starts running:

- Turn the ignition off and then on again.

- Connect the (VAG 1527B) to the electrical connector for the after run coolant pump, using adapter cables from the (VAG 1594C).





• Light Emitting Diode (LED) must light up.

• This test must be performed inside of 10 min. after the ignition has been switched off.

If the LED does not light up:

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