Volkswagen Passat 1995 Official Factory Repair Manual page 1742

On Board Diagnostic (OBD II)
Cause:
Malfunction Indicator Lamp (MIL) -K83- is not
activated or does not light-up due to open
circuit
Malfunction cause:
http://ebahn.bentleypublishers.com/vw/servlet/Display?action=Goto&type=repair&id=VW.B4.FU07.01.1
Functional check:
- Switch ignition on.
The MIL must light-up.
If the MIL does not light with ignition switched
on:
- Check wiring to MIL as follows:
Remedy:
- Switch ignition off
- Connect VAG 1598/18 test box
- Bridge test box sockets 1 and 5
- Switch ignition on
MIL must light-up
If the MIL does not light-up:
- Switch ignition off
- Check MIL bulb
If bulb is OK:
- Locate and eliminate short or wiring open circuit
from Engine Control Module (ECM) to MIL using
wiring diagram
If no malfunction can be detected in the wiring to
MIL:
ECM -J220- faulty
- Replace ECM, erase Diagnostic Trouble Code
(DTC) memory.
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12/6/2004