Speed Sensor Diagnostics Inoperative

CAUTION: If ABS ECU replacement is necessary during testing, always ensure ABS ECU connectors and ground circuit are okay. If either are suspect, repair and repeat testing to confirm ABS ECU malfunction.

Check Ts terminal circuit. See Ts TERMINAL CIRCUIT under SYSTEM TESTS. Ensure ABS ECU connectors are clean and tight. Ensure connector terminals are not damaged. Repair as needed. If ABS ECU connectors are okay, replace ABS ECU.