relay AUDI A4 1999 B5 / 1.G AFC Engine EVAP Canister Purge Regulator Valve Checking Workshop Manual

24-59

Checking voltage supply

- Disconnect EVAP canister purge regulator valve
harness connector.

If voltage tester does not light up: - Connect VAG 1527B voltage tester between connector terminal 1 and
engine Ground (GND) using jumper wires from connector test kit VW
1594.
- Use scan tool "Output Diagnostic Test Mode" function 03 to trigger fuel
pump relay -J17- page 01
-145
.
Voltage tester must light up
- Check fuse for EVAP canister purge regulator valve.

- Check wiring for continuity between EVAP canister purge regulator
valve connector terminal 1 and fuse, using wiring diagram.
- Check fuel pump relay and triggering page 24
-24
.
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