Volkswagen Workshop Service and Repair Manuals > Golf Mk4 > Power unit | 5-cylinder injection engine, mechanics | Engine cooling | Removing and installing parts of cooling system | Checking continued coolant circulation pump V51

Checking continued coolant circulation pumpV51

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	Fuse 16 must be OK.

Test procedure

–	Pull 2-pin connector off continued coolant circulation pump -V51-.

–	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:

–	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 ignition being switched 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.

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