fuse diagram AUDI A4 1999 B5 / 1.G AFC Engine Exhaust Gas Recirculation Checking Workshop Manual

24-68

Checking voltage supply

- Disconnect EGR vacuum regulator solenoid
valve harness connector.

If voltage tester does not light up: - Connect VAG 1527B voltage tester between connector terminal 1 (B+)
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 EGR vacuum regulator solenoid valve.

- Check wiring for continuity between EGR vacuum regulator solenoid
valve connector terminal 1 and fuse, using wiring diagram.

Specified value: max. 1.0 ohm ( )- Check fuel pump relay and triggering page 24
-24
.
Pa
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(EGR
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