TRAC 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.

Retrieve DTC. Go to appropriate DTC for diagnostic procedure. Check IG power source circuit. See DTC 41 under SELF-DIAGNOSTICS . Check hydraulic system for leakage. See Figure. Check speed sensor circuit. See DTC 31-34 under SELF-DIAGNOSTICS . If all preceding tests are okay, replace ABS/TRAC ECU.