Speed Sensor Diagnostics Inoperative

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

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