Checking the functionality and supply voltage
1. Check fuse #40 (fig. 4.16 a). It must be in working order.
Caddy Van
2. Remove the cover on the front right side of the luggage compartment.
3. Remove the floor panel on the right side of the luggage compartment.
4. Remove the floor cover.
Caddy Kombi, Polo Classic, Polo Estate
5. Move the rear seats forward.
6. Remove the floor cover.
7. With the floor cover removed: briefly turn the crankshaft with the starter. The fuel pump should turn on for about 1 second.
8. If the fuel pump does not turn on, turn off the ignition. Remove fuse 40 of the fuel pump.
9. Connect the VAG 1348/3A remote control device with the additional VAG 1348/3-2 cable to contact 40b of the two-pin connector of the fuel pump wiring and the "+" battery (fig. 4.16 b).
10. Turn on the VAG 1348/3A remote control device.
11. Fuel pump is working: check the activation of the fuel pump relay (see wiring diagram).
12. Fuel pump does not work: disconnect 4-pin wiring connector 1 from flange 2 of the fuel tank (fig. 4.16 in).
13. Connect the VAG 1527 diode tester with the VAG 1594 auxiliary lead to the outer contacts of the wiring connector (fig. 4.16 g).
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14. Turn on the remote control device. The light should come on. If the light does not come on, check the electrical circuit for a broken wire.
15. The light bulb came on (voltage is normal). Loosen the flange mounting nut using the 3217 wrench. Check the electrical wires between the flange and the fuel pump.
16. If no open circuit is found, replace the fuel pump.
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