Volkswagen Workshop Service and Repair Manuals

Checking continued coolant circulation pump -V51- Special tools and workshop equipment required

t  Voltage tester -V.A.G 1527B-

t  Auxiliary measuring set -V.A.G 1594C- t  Current flow diagram Test prerequisite

l  All fuses must be OK. Test procedure –  Remove engine cover.

–  Pull off 2-pin connector from continued coolant circulation pump -V51--arrow-. Checking function

–  Connect contacts of continued coolant circulation pump -V51- to battery using cables from auxiliary measuring set -V.A.G 1594C-. Continued coolant circulation pump -V51- must run. If continued coolant circulation pump -V51- does not run: –  Renew continued coolant circulation pump -V51-. If the continued coolant circulation pump -V51- runs: Checking activation –  Switch ignition on and off again.

–  Connect voltage tester -V.A.G 1527B- with cables from auxiliary measuring set -V.A.G 1594C- to removed connector of continued coolant circulation pump -V51- LED must light up.   Note This check must be performed within 10 minutes of switching ignition off. If LED does not light up: –  Locate and eliminate open circuit using current flow diagram → Current flow diagrams, Electrical fault finding and Fitting locations.