Abs Does Not Operate Efficiently

Retrieve Diagnostic Trouble Codes (DTC). See RETRIEVING TROUBLE CODES under SELF-DIAGNOSTIC SYSTEM . Check speed sensor circuits. See DTC 31, 32, 33, 34, 35 and 36 (speed sensor circuit codes) under CIRCUIT TESTS. Check stoplight switch circuit. See STOPLIGHT SWITCH CIRCUIT  under CIRCUIT TESTS. Check ABS actuator. See appropriate ACTUATOR CHECK under CIRCUIT TESTS . If ABS actuator is okay, check hydraulic system for leaks. If all listed items test okay, replace ABS ECU.