Speed Sensor Diagnostics Inoperative

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

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