Symptom Chart

TROUBLESHOOTING METHODS
Problems related to the A.B.S. can be classified into two general categories: problems in the electrical system and those in the hydraulic system.

The problems in the electrical system the on-board diagnostic is built into the electronic control unit (ECU) causing the ABS warning light to illuminate as a warning to the driver. In this instance. checks can be made by using the scan tool and oscilloscope. Problems in the hydraulic system (poor braking. etc.) can be located in the same way as for ordinary brakes. There is. however. the necessity to check to determine whether the problem is related to ordinary brake components or to the components related to the ABS. To make this check, use the scan tool.














HOW TO USE THE TROUBLESHOOTING FLOW CHART
(1) Following the flow chart, first refer to the illumination pattern of the ABS warning light. and next note the diagnostic trouble code and inspect the brake operation.
(2) Follow the inspection charts listed in the "Remedy" column. In each inspection chart, [Comment] and [Hint] are listed for troubleshooting reference.

NOTE ECU: Electronic control unit