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

Test conditions





^ All fuses must be OK.

Test sequence
- Pull off 2-pin connector from After-Run Coolant Pump V51.





- Connect contacts of after-run coolant pump V51 to battery, using adapter cables from connector test set V.A.G 1594C. After-Run Coolant Pump V51 must start running.

If after-run coolant pump V51 does not start running:
- Replace after-run coolant pump V51.

If after-run coolant pump V51 does starts running:
- Turn ignition off and then on again.





- Connect voltage tester V.A.G 1527B to disconnected connector of after-run coolant pump V51, using adapter cables from connector test set V.A.G 1594C. LED must light up.

Note: This test must be performed inside of 5 min. after the ignition has been switched off.

If LED does not light up:
- Determine and eliminate open circuit according to electrical schematics.