DTC 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 ABS warning light circuit. See ABS WARNING LIGHT CIRCUIT under SELF-DIAGNOSTICS. Check TRAC OFF warning light circuit. See TRAC OFF WARNING LIGHT, TRAC CUT SWITCH CIRCUIT. Check Tc terminal circuit. See TC TERMINAL CIRCUIT under SELF-DIAGNOSTICS. If all preceding tests are okay, replace ABS/TRAC ECU.