Diagnosis and Testing - Without TCS

Both warning light and LED remain on unless the ignition is turned off. Only one trouble code is displayed at a time. If multiple problems occur, only the first problem detected is displayed, that problem must be repaired first in order to check for further trouble codes. If the LED does not activate even though the warning lamp is on, the power supply may be inoperative.

Fig. 13 Trouble Code Identification:

To perform self diagnosis, drive vehicle at a speed greater than 20 mph for at least one minute. If system is malfunctioning, a warning lamp on the dash panel will come on. Approximately ten seconds after the light comes on, an LED located on the ABS control unit displays a trouble code. This trouble code is determined by the number of flashes the LED emits. To read codes, vehicle must remain running. Read LED codes as shown in Fig. 13.

Fig. 15 ABS Wiring Diagram:

Refer to Fig. 13, for trouble code identification and Fig. 15, for ABS system wiring circuit.