For a complete wiring diagram Refer to Section 8WWhen Monitored:With the ignition on.Set Condition:If the Anti-Lock Brakes Module detects system voltage is above 17 volts.Possible CausesECM/PCM DTCs PRESENTVEHICLE BATTERY / CHARGING SYSTEMANTI-LOCK BRAKES MODULEThis DTC must be active for the results of this test to be valid.Turn the ignition on.With the scan tool, read and record DTCs from the ECM/PCM.With the scan tool, read and record Freeze Frame information.With the scan tool, erase DTCs.Start the engine.With the scan tool, read and record DTCs.With the scan tool read DTCs from the PCM.Are any charging system codes present?YesRepair the charging system DTC in the ECM/PCM.Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE).NoGo To 2 2. CHARGING SYSTEM FAILUREStart the engine.Connect voltmeter to vehicle battery.Is the vehicle battery voltage over 16.8 volts?NoGo To 3YesRepair the charging system per service information.Perform ABS VERIFICATION TEST. (Refer to 5 - BRAKES - STANDARD PROCEDURE). 3. CHARGING POWER SUPPLY VOLTAGEWith a scan tool read Power Supply Voltage.Is Power Supply Voltage over 16.8 volts?NoPerform the ABS Intermittent Condition diagnostic procedure in this Section.Refer to the ABS-INTERMITTENT CONDITION TEST. (Refer to 5 - BRAKES - DIAGNOSIS AND TESTING) YesReplace the Anti-Lock Brakes Module in accordance with the Service Information.Perform ABS VERIFICATION TEST. (Refer to 5 - BRAKES - STANDARD PROCEDURE).