After-Run Coolant Pump: Testing and Inspection

After-Run Coolant Pump (V51), Checking

Special tools, testers and auxiliary items required

• Voltage Tester (V.A.G 1527B)

• Connector Test Set (V.A.G 1594C)

• Wiring diagram

Conditions

• The fuses must be OK.

Sequence

- Remove the noise insulation.

- Disconnect the 2 pin connector from the after run coolant pump (V51).

- Connect the contacts of the after run coolant pump to the battery, using adapter cables from the (V.A.G 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 (V.A.G 1527B) and the cables taken from the (V.A.G 1594C) to the connector, which was disconnected from the after run coolant pump.






• Light Emitting Diode (LED) must light up.

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

If the LED does not light up:

- Locate and repair open circuit in wiring.