Troubleshooting Methods

TROUBLESHOOTING METHODS

Problems related to the anti-lock braking system (A.B.S.) can be classified into two general categories: problems in the electrical system and those in the hydraulic system.

For problems in the electrical system, the on-board diagnostic is built int9 the electronic control unit (E.C.U.) causing the A.B.S. 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 A.B.S. To make this check, use the scan tool.