ABS warning lamp: Notes

Fig 1: Identifying ABS Warning Lamp Illumination

Courtesy of SAAB-SCANIA OF AMERICA, INC.

The ESP control module monitors the operation of the ABS system and turns on the ABS warning lamp on the right-hand side of the main instrument unit if a fault occurs.

When the ABS lamp lights up, the anti-lock braking system is disabled and the brakes work just like a conventional braking system.

Fig 2: ABS Warning Lamp Communication Diagram

Courtesy of SAAB-SCANIA OF AMERICA, INC.

The main instrument unit receives information on the bus to turn on/off the lamp.

The ESP control module lights the lamp when the ignition is turned on. If there are no faults, the lamp will go out after 3 seconds.

When the ABS warning lamp is lit, the central warning lamp comes on and at engine speeds higher than 300 RPM, MIU sends a request to SID to activate the acoustic signal.