United Nations Economic Commission for Europe Regulation Number 13 (ECE 13) Response

The electronic brake control module (EBCM) illuminates the antilock brake system (ABS) indicator when a malfunction which disables ABS is detected. Usually, the ABS indicator is turned OFF during the following ignition cycle unless the fault is detected during that ignition cycle. However, the setting of a wheel speed sensor related DTC may cause the ABS indicator to remain illuminated during the following ignition cycle until the vehicle is operated at a speed greater than 13 km/h (8 mph) or, occasionally, 64 km/h (40 mph), depending on which DTC sets. This allows the EBCM to verify that no malfunction exists, before turning OFF the ABS indicator. It is important to verify that United Nations Economic Commission for Europe regulation number 13 (ECE 13) is not the cause of an ABS indicator which is illuminated when no DTCs are set, before attempting to diagnose other possible causes.