For a complete wiring diagram Refer to Section 8W.When Monitored:With the ignition on.Set Condition:When the Right Front Wheel Speed Sensor (WSS) reading is different from the readings received from the other sensors at a vehicle speed above 40 km/h (25 mph). The Anti-Lock Brake Module compares WSS readings from side-to-side on an axle and front-to-rear.Possible CausesRIGHT FRONT WSS LOOSE — B6, B7 CIRCUITS/CONNECTOR/TERMINAL DAMAGEIMPROPER RIGHT FRONT TIRE PRESSURE/MISMATCHED TIRESRIGHT FRONT TONE WHEEL/BEARING DAMAGERIGHT FRONT WSSANTI-LOCK BRAKE MODULE1. CHECK FOR DTC C101F-RIGHT FRONT WHEEL SPEED COMPARATIVE PERFORMANCEThis DTC must be active for the results of this test to be valid.Turn the ignition on.With the scan tool, record and erase DTCs.Road test the vehicle over 40 km/h (25 mph).Vehicle must be driven above 40 km/h (25 mph) for set conditions to be met.With the scan tool, read DTCs.Does the scan tool display: C101F-RIGHT FRONT WHEEL SPEED COMPARATIVE PERFORMANCE active?YesGo To 3 NoGo To 22. CHECK WHEEL SPEED SENSOR SIGNALSTurn the ignition on.With the scan tool, monitor and graph ALL the WSS speeds and compare graph while an assistant drives the vehicle.If graph shows periodic dropouts pay close attention to the tone wheel.Slowly accelerate as straight as possible from a stop to 40 km/h (25 mph).Is the Right Front WSS speed showing 0 km/h (0 mph) or not matching other wheels or showing erratic behavior?YesGo To 3 NoThe 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)3. CHECK FOR IMPROPER RIGHT FRONT TIRE PRESSURE/MISMATCHED TIRESTurn the ignition off.Check and adjust the Right Front Tire pressure.Check and adjust all other tire pressures.Inspect for mismatched tires on vehicle.Is the Right Front Tire improperly inflated or mismatched tires on vehicle?YesRepair as necessary.Perform ABS VERIFICATION TEST. (Refer to 5 - BRAKES - STANDARD PROCEDURE)NoGo To 44. CHECK RIGHT FRONT WSS LOOSENESS, INSPECT B6, B7 CIRCUITS/TERMINALS FOR DAMAGECheck all terminals for broken, bent, pushed out, or corroded terminalsInspect the Anti-Lock Brake Module harness connector, Right Front WSS, and Right Front WSS harness connectorInspect the Right Front WSS for looseness, excessive corrosion and not properly fastened.Inspect the (B6) Right Front WSS Signal and (B7) Right Front WSS Supply circuits between the Right Front WSS and Anti-Lock Brake Module for damage.Is the Right Front WSS loose or any of the wiring/connectors/terminals damaged?YesRepair as necessary.Perform ABS VERIFICATION TEST. (Refer to 5 - BRAKES - STANDARD PROCEDURE)NoGo To 55. CHECK RIGHT FRONT WHEEL SPEED SENSOR FOR DAMAGERemove the Right Front Wheel Speed SensorInspect the Right Front Wheel Speed Sensor face for damage. Is the Right Front Wheel Speed Sensor damaged?YesReplace sensor and hub assembly.Perform ABS VERIFICATION TEST. (Refer to 5 - BRAKES - STANDARD PROCEDURE)NoGo To 66. CHECK RIGHT FRONT TONE WHEEL/BEARING FOR DAMAGEInspect the Right Front Tone Wheel/Bearing for damage, missing teeth, cracks, corrosion or looseness.The Tone Wheel teeth should be perfectly square, not bent, or nicked.Is the Right Front Tone Wheel/Bearing damaged?YesRepair as necessary.Perform ABS VERIFICATION TEST. (Refer to 5 - BRAKES - STANDARD PROCEDURE)NoGo To 77. RIGHT FRONT WHEEL SPEED SENSORReplace the Right Front Wheel Speed Sensor in accordance with the Service Information.Perform ABS VERIFICATION TEST. (Refer to 5 - BRAKES - STANDARD PROCEDURE)Road test the vehicle over 40 km/h (25 mph).Vehicle must be driven above 40 km/h (25 mph) for set conditions to be met.With the scan tool, read ABS DTCs.Did DTC C101F-RIGHT FRONT WHEEL SPEED COMPARATIVE PERFORMANCE reset?YesReplace the Anti-Lock Brakes Module in accordance with the Service Information.Perform ABS VERIFICATION TEST. (Refer to 5 - BRAKES - STANDARD PROCEDURE)NoTest Complete.