Abs Does Not Operate
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 speed sensor circuit. See DTC 31-34 under SELF-DIAGNOSTICS . Check ABS/TRAC actuator. See ABS/TRAC ACTUATOR CHECK under DIAGNOSIS & TESTING. If ABS/TRAC actuator is not okay, check hydraulic system for leakage. See Fig 1. If all preceding tests are okay, replace ABS/TRAC ECU.