U0125–LOST COMMUNICATION WITH DYNAMICS SENSORFor a complete wiring diagram Refer to Section 8W.When Monitored:With the ignition on.Set Condition:If the Anti-Lock Brakes Module fails to receive bus messages from the Dynamics Sensor.
Possible CausesWIRING HARNESS, TERMINAL, CONNECTOR DAMAGE(D52) DYNAMICS SENSOR HIGH DATA LINK CIRCUIT SHORTED TO GROUND, SHORTED TO VOLTAGE, OR OPEN(D51) DYNAMICS SENSOR LOW DATA LINK CIRCUIT SHORTED TO GROUND, SHORTED TO VOLTAGE, OR OPENDYNAMICS SENSORANTI-LOCK BRAKES MODULE
Diagnostic Test1.VERIFY DTC IS ACTIVEIf present, diagnose and repair DTC C2114–DYNAMICS SENSOR SUPPLY VOLTAGE LOW or DTC C2115–DYNAMICS SENSOR SUPPLY VOLTAGE HIGH before proceeding.Turn the ignition on.With the scan tool, read and record ABS DTCs.With the scan tool, read and record Environmental Data (EV Data).With the scan tool, erase ABS DTCs.Cycle the ignition switch.With the scan tool, read ABS DTCs.Does this DTC reset?YesGo To 2NoThe condition that caused the symptom is currently not present. Inspect the related wiring for a possible intermittent condition. Look for any chafed, pierced,
pinched, or partially broken wires.Refer to the ABS-INTERMITTENT CONDITION TEST. (Refer to 5 - BRAKES - DIAGNOSIS AND TESTING)2.INSPECT RELATED WIRING HARNESS, TERMINALS, & CONNECTORSVisually inspect the related wiring harness. Look for any pinched, chafed, pierced, and partially broken wires.Visually inspect the related wiring harness connectors. Look for broken, bent, pushed out, and corroded terminals.Were any problems found?YesRepair as necessary.Perform ABS VERIFICATION TEST. (Refer to 5 - BRAKES - STANDARD PROCEDURE).NoGo To 33.CHECK THE (D52) DYNAMICS SENSOR HIGH DATA LINK CIRCUIT FOR A SHORT TO VOLTAGEDisconnect the Anti-Lock Brakes Module harness connector.Disconnect the Dynamics Sensor harness connector. Turn the ignition on.Measure the voltage of the (D52) Dynamics Sensor High Data Link circuit.Is there any voltage present?YesRepair the (D52) Dynamics Sensor High Data Link circuit for a short to voltage.Perform ABS VERIFICATION TEST. (Refer to 5 - BRAKES - STANDARD PROCEDURE).NoGo To 44.CHECK THE (D52) DYNAMICS SENSOR HIGH DATA LINK CIRCUIT FOR A SHORT TO GROUNDTurn the ignition off.Measure the resistance of the (D52) Dynamics Sensor High Data Link circuit between ground and the Dynamics Sensor harness connector.Is the resistance below 5.0 ohms?YesRepair the (D52) Dynamics Sensor High Data Link circuit for a short to ground.Perform ABS VERIFICATION TEST. (Refer to 5 - BRAKES - STANDARD PROCEDURE).NoGo To 55.CHECK THE (D52) DYNAMICS SENSOR HIGH DATA LINK CIRCUIT FOR AN OPENMeasure the resistance of the (D52) Dynamics Sensor High Data Link circuit between the Dynamics Sensor harness connector and the Anti-Lock Brakes Module harness connector.Is the resistance below 5.0 ohms?YesGo To 6NoRepair the (D52) Dynamics Sensor High Data Link circuit for an open.Perform ABS VERIFICATION TEST. (Refer to 5 - BRAKES - STANDARD PROCEDURE).6.CHECK THE (D51) DYNAMICS SENSOR LOW DATA LINK CIRCUIT FOR A SHORT TO VOLTAGETurn the ignition on.Measure the voltage of the (D51) Dynamics Sensor Low Data Link circuit.Is there any voltage present?YesRepair the (D51) Dynamics Sensor Low Data Link circuit for a short to voltage.Perform ABS VERIFICATION TEST. (Refer to 5 - BRAKES - STANDARD PROCEDURE).NoGo To 77.CHECK THE (D51) DYNAMICS SENSOR LOW DATA LINK CIRCUIT FOR A SHORT TO GROUNDTurn the ignition off.Measure the resistance of the (D51) Dynamics Sensor Low Data Link circuit between ground and the Dynamics Sensor harness connector.Is the resistance below 5.0 ohms?YesRepair the (D51) Dynamics Sensor Low Data Link circuit for a short to ground.Perform ABS VERIFICATION TEST. (Refer to 5 - BRAKES - STANDARD PROCEDURE).NoGo To 88.CHECK THE (D51) DYNAMICS SENSOR LOW DATA LINK CIRCUIT FOR AN OPENMeasure the resistance of the (D51) Dynamics Sensor Low Data Link circuit between the Dynamics Sensor harness connector and the Anti-Lock Brakes Module harness connector.Is the resistance below 5.0 ohms?YesReplace the Dynamics Sensor in accordance with the Service Information.Perform ABS VERIFICATION TEST. (Refer to 5 - BRAKES - STANDARD PROCEDURE).NoRepair the (D51) Dynamics Sensor Low Data Link circuit for an open.Perform ABS VERIFICATION TEST. (Refer to 5 - BRAKES - STANDARD PROCEDURE).