Operation CHARM: Car repair manuals for everyone.

Central Warning Lamp




Central Warning Lamp












The central warning lamp lights up when a fault occurs in a system having to do with the car's safety.

The lamp is supplied with +15 current from the main instrument unit and grounded by the MIUs control module when one of the following warning or indicator lamps lights up:
- AIRBAG lamp
- Oil pressure lamp
- Charging lamp
- Brake fluid warning lamp
- Handbrake lamp
- ABS warning lamp

The handbrake lamp lights the central warning lamp if the speed passes 5 km/h from a speed below 5 km/h.

All these lamps are supplied with current (+15 circuit) in the main instrument unit and grounded in their respective systems.

The central warning lamp also lights up when:
- The coolant temperature exceeds 129 °C

At the same time as the central warning lamp lights up, the main instrument unit send bus information to the SID to activate an acoustic signal. This does not happen when the starting the engine since the lamps are then only tested; the engine speed must be greater than 300 rpm for this request.

Diagnostics
The function has no diagnostics.