Functional check:
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 1999 Volkswagen Jetta, 1999 Volkswagen GTI, 1998 Volkswagen Jetta, 1998 Volkswagen GTI, and 1997 Volkswagen Jetta. However, it is still accessible from the selected car via links, so may be relevant.
- Switch ignition on.
- The MIL must light-up.
If the MIL does not light with ignition switched on:
- Check wiring to MIL as described in MIL NOT ACTIVATED TROUBLESHOOTING
.MIL NOT ACTIVATED TROUBLESHOOTING
Cause: Remedy: Malfunction Indicator Lamp (MIL) -K83 - is not activated or does not light -up due to open circuit - 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
Malfunction cause: If no malfunction can be detected in the wiring to MIL: ECM -J220- faulty - Replace ECM, erase Diagnostic Trouble Code (DTC) memory.
If the MIL lights with ignition switched on, continue check as follows:
- Start engine and run at idle speed: MIL must go out after a few seconds.
If the MIL does not go out:
- Check DTC memory, see CHECK DTC MEMORY (SCAN TOOL FUNCTION 02)
If no malfunction is stored: see MIL PERMANENTLY ACTIVATED MALFUNCTION CHART .
MIL PERMANENTLY ACTIVATED MALFUNCTION CHART
| Cause: | Remedy: |
|---|---|
| Malfunction Indicator Lamp (MIL) -K83 - is permanently activated by short circuit to Ground (GND) |
If the specification is not attained:
|
| Malfunction cause: | If the specification INFINITE ohms (ohm) is attained and no short circuit to Ground (GND) can be found: ECM -J220- faulty
|