Abs Does Not Operate

Retrieve Diagnostic Trouble Codes (DTC). See RETRIEVING DIAGNOSTIC TROUBLE CODES (DTC)  under SELF-DIAGNOSTICS. Ensure a normal DTC is output. Check ignition power supply circuit. See DTC 41: LOW BATTERY VOLTAGE  under DIAGNOSTIC TESTS. Check speed sensor circuits. See DTC 31 , 32, 33, 34: SPEED SENSOR CIRCUIT MALFUNCTION under DIAGNOSTIC TESTS. Check ABS actuator. See ACTUATOR CHECK under COMPONENT TESTS. If ABS actuator is okay, check hydraulic system for leaks. If all above items test okay, replace ABS ECU.