01-3
Checking function
- Switch ignition on.
MIL must light up.
- If MIL does not light when ignition is switched
on, check wiring to MIL as follows: Cause:
MIL is not triggered, or does not light, due to faulty
wiring or open circuit. Remedy:
- Switch ignition off.
- Connect VAG 1598/22 test box.
- Connect jumper wire to bridge test box sockets 2 and 17.
- Switch ignition on.
MIL must light up.
If MIL does not light:
- Switch ignition off.
- Check bulb for MIL.
If bulb is OK:
- Check wiring for open circuit between MIL and Motronic ECM -
J220- using applicable wiring diagram.
Pa
ge 4 of 57 On Board Dia
gnostic
(OBD
)
11/19/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU02.01.1
