After-Run Coolant Pump: Testing and Inspection

After-run coolant pump -V51-, checking
Special tools and equipment





^ VAG1527B LED test light





^ VAG1594A Auxiliary test set
^ Wiring diagram

Checking conditions





^ Fuse No. 16 OK.

Test sequence
- Pull 2 pin connector off After-run coolant pump -V51-.





- Connect contacts of After-run coolant pump -V51- to battery using auxiliary cables from VAG1594.
After-run coolant pump must run.
If the after-run coolant pump does not run:
- Replace after-run coolant pump -V51-.
If the after-run coolant pump -V51- runs:
- Switch ignition off and on again.
- Connect LED test light VAG1527B to disconnected connector for After-run coolant pump -V51- with auxiliary cable from VAG1594 A
LED must light up.

Note: This check must be performed within 10 minutes of switching ignition off.

LED does not light up:
- Locate and repair open circuit using wiring diagram:
Refer to, Electrical Wiring Diagrams, Troubleshooting & Component Locations