Possible Causes

• Wheels
• Tires
• Suspension components
• Parking brake shoes out of adjustment (dragging)
• SASM (equipped with adaptive steering)
• Steering wheel rotation sensor (not equipped with adaptive steering)
• RCM

Fig 1: Antilock Braking System (ABS) Module Connector - C135

Courtesy of FORD MOTOR COMPANY

Fig 2: Restraint Control Module-A (RCM-A) Connector - C310A

Courtesy of FORD MOTOR COMPANY

Harness Side

Fig 3: Restraint Control Module-B (RCM-B) Connector - C310B

Courtesy of FORD MOTOR COMPANY

Harness Side

Fig 4: Steering Angle Sensor Module (SASM) Connector - C2414

Courtesy of FORD MOTOR CO.

1. BF1: CHECK THE STEERING COLUMN 
   • Inspect the steering column and steering wheel for correct installation and any observable damage. REFER to the appropriate Removal and Installation procedures in the Steering Column article.
   • Are the steering column and steering wheel installed correctly and free from any observable damage? 

   Yes	No
   Go to  BF2.	REPAIR any damage found or INSTALL a new component as necessary. TEST DRIVE the vehicle at speeds greater than 20 km/h (12 mph) and make at least 1 left turn and 1 right turn. If the condition does not return, the repair is complete. If the condition returns, Go to  BF2.

2. BF2: VERIFY CORRECT WHEELS AND TIRES 
   • Verify the wheels and tires are the correct size as indicated on the VC label.
   • With the transmission in NEUTRAL, position the vehicle on a hoist. Refer to the Jacking and Lifting article.
   • Using a flexible tape measure, string or similar item, measure and record the circumference of each tire and compare them to each other.
   • Are the wheels and tires the correct size as indicated on the VC label and are the circumferences of all tires within 12.7 mm (0.5 in) of each other? 

   Yes	No
   Go to  BF3.	INSTALL new wheels or tires as necessary. TEST DRIVE the vehicle at speeds greater than 20 km/h (12 mph) and make at least 1 left turn and 1 right turn. If the condition does not return, the repair is complete. If the condition returns, Go to  BF3.

3. BF3: CHECK THE SUSPENSION COMPONENTS 
   • Remove all the wheels.
   • Inspect the following components for any observable damage:
     • Front wheel bearings and wheel hubs
     • Front wheel knuckles and spindles
     • Ball joints
     • Front axle shafts
     • Front axle shaft CV-joints or U-joints
     • Front wheel speed sensor encoder rings
     • Front wheel speed sensors
     • Rear wheel hubs
     • Rear wheel speed sensor encoder rings
     • Rear wheel speed sensors
   • Are any components noticeably damaged? 

   Yes	No
   REPAIR any damage found or INSTALL a new component as necessary. TEST DRIVE the vehicle at speeds greater than 20 km/h (12 mph) and make at least 1 left turn and 1 right turn. If the condition does not return, the repair is complete. If the condition returns, Go to  BF4.	Go to  BF4.

4. BF4: CHECK THE PARKING BRAKE OPERATION 
   • Using the parking brake switch, apply and release the parking brakes.
   • Do the parking brakes apply and release normally, without any warning indicators or message center warning message? 

   Yes	No
   Go to  BF6.	DIAGNOSE and REPAIR the parking brake system. REFER to the Diagnosis and Testing in the Parking Brake and Actuation article. TEST DRIVE the vehicle at speeds greater than 20 km/h (12 mph) and make at least 1 left turn and 1 right turn. If the condition does not return, the repair is complete. If the condition returns, Go to  BF6.

5. BF5: CHECK THE PARKING BRAKE SHOE ADJUSTMENT 
   • Verify the parking brake shoes are correctly adjusted. Refer to Parking Brake Shoe Adjustment procedure in the Parking Brake and Actuation article.
   • Are the parking brake shoes adjusted correctly? 

   Yes	No
   Go to  BF6.	REPAIR any damage found or INSTALL a new component as necessary. TEST DRIVE the vehicle at speeds greater than 20 km/h (12 mph) and make at least 1 left turn and 1 right turn. If the condition does not return, the repair is complete. If the condition returns, Go to  BF6.

6. BF6: VERIFY THE ABS AND STABILITY CONTROL SYSTEM HAVE BEEN INITIALIZED 
   • Ignition ON, engine OFF.
   • Using a diagnostic scan tool, carry out the IVD Initialization routine.
   • Test drive the vehicle at speeds greater than 20 km/h (12 mph) and make at least 1 left turn and 1 right turn.
   • Is the concern still present? 

   Yes	No
   Go to  BF7.	The repair is complete and was most likely due to the system not being initialized or by a failed initialization.

7. BF7: CHECK THE ABS MODULE STEERING WHEEL POSITION PID 
   • Access the ABS and monitor the STEER_ANGL (ANGL) PID.
   • Access the ABS and monitor the STR_ANG_ABS (ANGL) PID.
   • Access the ABS and monitor the SWA_POS (ANGL) PID.
   • Slowly rotate the steering wheel 360 degrees to the right and then to the left.
   • Does the PID display increase smoothly and does the PID display a full 360 degrees in both directions? 

   Yes	No
   Go to  BF8.	Go to  BF13.

8. BF8: CHECK THE ABS MODULE YAW RATE PID 
   • Access the ABS and monitor the YAW_RATE_C (ANGV) PID.
   • Access the ABS and monitor the YAW_RATE (ANGV) PID.
   • Access the ABS and monitor the YAW_RATE_2 (ANGV) PID.
   • Monitor the PID with the vehicle on level ground and at a complete standstill.
   • Monitor the PID while rocking and shaking the vehicle.
   • Is the PID value between -0.5 and 0.5 with the vehicle at a standstill and does the value fluctuate when the vehicle is moved? 

   Yes	No
   Go to  BF9.	Go to  BF11.

9. BF9: CHECK THE ABS MODULE LATERAL ACCELERATION PID 
   • Access the ABS and monitor the LAT_ACCL (ACC) PID.
   • Access the ABS and monitor the LAT_ACCL_C (ACC) PID.
   • Access the ABS and monitor the LAT_ACCL_2 (ACC) PID.
   • Monitor the PID with the vehicle on level ground and at a complete standstill.
   • Monitor the PID while rocking and shaking the vehicle.
   • Is the PID value between -0.4 and 0.4 with the vehicle at a standstill and does the value fluctuate when the vehicle is moved? 

   Yes	No
   Go to  BF10.	Go to  BF11.

10. BF10: CHECK THE ABS MODULE LONGITUDINAL ACCELERATION PID 
    • Access the ABS and monitor the LNGACC (ACC) PID.
    • Access the ABS and monitor the LONG_ACCL (ACC) PID.
    • Monitor the PID with the vehicle on level ground and at a complete standstill.
    • Monitor the PID while rocking and shaking the vehicle.
    • Is the PID value between -0.4 and 0.4 with the vehicle at a standstill and does the value fluctuate when the vehicle is moved? 

    Yes	No
    Go to  BF13.	Go to  BF11.

11. BF11: CHECK THE RCM INSTALLATION AND MOUNTING SURFACE 
    WARNING: Turn the ignition OFF and wait one minute to deplete the backup power supply. Failure to follow this instruction may result in serious personal injury or death in the event of an accidental deployment.
    • Ignition OFF.
    • Wait one minute.
    • RCM_A connector disconnected. (C310A)
    • RCM_B connector disconnected. (C310B)
    • Inspect the RCM installation and make sure the fasteners are fully seated and tightened to the correct torque specification.
    • Inspect the mounting surface for damage, corrosion or foreign material.
    • Is the RCM installed correctly and is the mounting surface clean and free from damage? 

    Yes	No
    Go to  BF12.	CLEAR or REPAIR the RCM mounting surface as necessary. CORRECTLY INSTALL the RCM and TIGHTEN the fasteners to the correct toque specification.

12. BF12: CHECK FOR CORRECT RCM OPERATION 
    • Using a good light source, inspect for the following:
      • inspect the connectors (including any in-line connectors) for pushed-out, loose or spread terminals and loose or frayed wire connections at terminals.
      • inspect the wire harness for any damage, pinched, cut or pierced wires.
      • inspect the RCM electrical connectors lever-lock for correct operation.
      • repair any concerns found. Refer to OEM Connector Repair Procedures article for schematic and connector information.
    • RCM_B connector connected. (C310B) Make sure the connector seats and latches correctly.
    • RCM_A connector connected. (C310A) Make sure the connector seats and latches correctly.
    • Test drive the vehicle at speeds greater than 20 km/h (12 mph) and make at least 1 left turn and 1 right turn.
    • Is the concern still present? 

    Yes

    No

    INSTALL a new RCM. CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new RCM. REFER to the Supplemental Restraint System article. ORDER a replacement RCM and INCLUDE the RVC on the form. If this is a Ford paid repair, INCLUDE the RVC on the warranty claim form.

    The concern is not present and cannot be recreated at this time. The DTC may have been set due to high network traffic, an intermittent fault condition or a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.

13. BF13: CHECK FOR CORRECT SASM OPERATION 
    • ABS Module connector disconnected. (C135)
    • SASM connector disconnected. (C2414)
    • Using a good light source, inspect all disconnected electrical connectors for the following:
      • corrosion - install new connector or terminal and clean the module pins
      • damaged or bent pins - install new terminals or pins
      • pushed-out pins - install new pins as necessary
      • spread terminals - install new terminals as necessary
    • SASM connector connected. (C2414) Make sure the connector seats and latches correctly.
    • ABS Module connector connected. (C135) Make sure the connector seats and latches correctly.
    • RCM_B connector connected. (C310B) Make sure the connector seats and latches correctly.
    • RCM_A connector connected. (C310A) Make sure the connector seats and latches correctly.
    • Test drive the vehicle at speeds greater than 20 km/h (12 mph) and make at least 1 left turn and 1 right turn.
    • Is the concern still present? 

    Yes

    No

    INSTALL a new SASM. The SASM is part of the clockspring, the 2 components are serviced as an assembly. CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new SASM - Clockspring assembly. REFER to the Clockspring Removal and Installation procedure in the Supplemental Restraint System article.

    The concern is not present and cannot be recreated at this time. The DTC may have been set due to high network traffic, an intermittent fault condition or a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.

14. BF14: CHECK FOR CORRECT SCCM OPERATION 
    • ABS Module connector disconnected. (C135)
    • SCCM_A connector disconnected. (C226A)
    • SCCM_B connector disconnected.
    • Remove the steering wheel rotation sensor.
    • Using a good light source, inspect all disconnected electrical connectors for the following:
      • corrosion - install new connector or terminal and clean the module pins
      • damaged or bent pins - install new terminals or pins
      • pushed-out pins - install new pins as necessary
      • spread terminals - install new terminals as necessary
    • Install the steering wheel rotation sensor.
    • SCCM_A connector connected. (C226A) Make sure the connector seats and latches correctly.
    • SCCM_B connector connected. Make sure the connector seats and latches correctly.
    • ABS Module connector connected. (C135) Make sure the connector seats and latches correctly.
    • RCM_B connector connected. (C310B) Make sure the connector seats and latches correctly.
    • RCM_A connector connected. (C310A) Make sure the connector seats and latches correctly.
    • Test drive the vehicle at speeds greater than 20 km/h (12 mph) and make at least 1 left turn and 1 right turn.
    • Is the concern still present? 

    Yes

    No

    INSTALL a new SCCM. CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new SCCM or steering wheel rotation sensor. REFER to the Anti-Lock Brake System (ABS) and Stability Control article or the Steering Wheel and Column Electrical Components article.

    The concern is not present and cannot be recreated at this time. The DTC may have been set due to high network traffic, an intermittent fault condition or a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.

15. BF15: CHECK FOR CORRECT SASM OPERATION 
    • ABS Module connector disconnected. (C135)
    • SASM connector disconnected. (C2414)
    • Using a good light source, inspect all disconnected electrical connectors for the following:
      • corrosion - install new connector or terminal and clean the module pins
      • damaged or bent pins - install new terminals or pins
      • pushed-out pins - install new pins as necessary
      • spread terminals - install new terminals as necessary
    • SASM connector connected. (C2414) Make sure the connector seats and latches correctly.
    • ABS Module connector connected. (C135) Make sure the connector seats and latches correctly.
    • RCM_B connector connected. (C310B) Make sure the connector seats and latches correctly.
    • RCM_A connector connected. (C310A) Make sure the connector seats and latches correctly.
    • Test drive the vehicle at speeds greater than 20 km/h (12 mph) and make at least 1 left turn and 1 right turn.
    • Is the concern still present? 

    Yes	No
    INSTALL a new SASM. CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no TSBs address this concern, INSTALL a new SASM. REFER to the Steering Wheel and Column Electrical Components article.	The concern is not present and cannot be recreated at this time. The DTC may have been set due to high network traffic, an intermittent fault condition or a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.