Visual Inspection and Diagnostic Pre-checks

• Make sure all 4 wheels and tires are in good condition and free from any defects or damage.
• Make sure the front suspension components are in good condition and free from any defects or damage.
• Make sure the steering system components are in good condition and free from any defects or damage.

Fig 1: Antilock Braking System Module Connector (C135)

Courtesy of FORD MOTOR COMPANY

Harness Side

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

Courtesy of FORD MOTOR CO.

Harness Side

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

Courtesy of FORD MOTOR CO.

Harness Side

Fig 4: Steering Angle Sensor Module Connector (C2414)

Courtesy of FORD MOTOR CO.

Harness Side

1. L1: CHECK FOR SASM DTCS 
   • Ignition ON, engine OFF.
   • Carry out the SASM self-test.
   • Are any DTCs present? 

     Yes	No
     DIAGNOSE all SASM DTCs first. DTC Index	Go to  L2.

2. L2: VERIFY SASM CALIBRATION 
   NOTE: The IMU Calibration routine is also known as the IVD Initialization routine.
   • Ignition OFF.
   • Ignition ON, engine OFF.
   • Test drive the vehicle above 20 km/h (12 mph) and make at least one left and one right turn.
   • Carry out the ABS self-test.
   • Is one or more DTC shown in the ABS Module DTC Fault Trigger Conditions table present? 

     Yes	No
     Go to  L3.	The condition causing the concern is no longer present. The concern was most likely due to an incomplete calibration or a failed calibration of the SASM. RETURN the vehicle to the customer.

3. L3: CHECK THE SASM PIDS 
   • Park the vehicle with the wheels in the straight ahead position.
   • Access the SASM and monitor the SW_ANGLE (ANGL) PID.
   • Starting from the center (straight ahead) position, turn the steering wheel to the right until it stops. Record the SW_ANGLE PID display.
   • Starting from the center (straight ahead) position, turn the steering wheel to the left until it stops. Record the SW_ANGLE PID display.
   • Does the PID display at least 360 degrees after reaching each end of travel point? 

     Yes	No
     Go to  L6.	CHECK the vehicle history. VERIFY if a new clockspring or SASM has been installed. If a new clockspring has been installed, VERIFY correct clockspring installation. REFER to the Removal and Installation procedure in Supplemental Restraint System article. If a new SASM has been installed, Go to  L4. If a new clockspring or SASM have not been installed, Go to  L10.

4. L4: INSPECT THE SASM INSTALLATION 
   • Ignition OFF.
   • Remove the clockspring. Refer to the Removal and Installation procedure in Supplemental Restraint System article.
   • Inspect the SASM and the SASM electrical connector for any obvious signs of damage, corrosion, foreign material or looseness.
   • Is the SASM and electrical connector OK? 

     Yes	No
     Go to  L5.	REPAIR or INSTALL new as necessary. REFER to the Removal and installation procedure in Steering Column Switches article

5. L5: VERIFY THE SASM ZERO POSITION 
   NOTE: The following steps set DTCs in the RCM. Makes sure to clear the DTCs before returning the vehicle to the customer.
   • Ignition ON, engine OFF.
   • Access the SASM and monitor the SW_ANGLE (ANGL) PID.
   • Turn the SASM rotor by hand until the SW_ANGLE PID displays 0 degrees.
   • Ignition OFF.
   • Install the clockspring. Refer to the Removal and Installation procedure in Supplemental Restraint System article.
   • Ignition ON, engine OFF.
   • Clear the ABS DTCs.
   • Ignition OFF.
   • Ignition ON, engine OFF.
   • Test drive the vehicle above 20 km/h (12 mph) and make at least one left and one right turn.
   • Carry out the ABS self-test.
   • Is one or more of the DTCs shown in the ABS Module DTC Fault Trigger Conditions table present? 

     Yes	No
     Go to  L10.	The condition causing the concern is no longer present. The concern was most likely due to an incorrectly installed SASM. RETURN the vehicle to the customer. CLEAR any RCM DTCs.

6. L6: CHECK THE ABS MODULE YAW RATE VALUE (YAW_RATE) PID 
   NOTE: The vehicle must be on level ground and at a complete standstill. Any vehicle movement results in false values for this test.
   • Access the ABS and monitor the YAW_RATE (ANGV) PID.
   • Is the YAW_RATE PID value between -0.05 and 0.05? 

     Yes	No
     Go to  L7.	Go to  L9.

7. L7: CHECK THE ABS MODULE LATERAL ACCELERATION (LAT_ACCL) PID 
   NOTE: The vehicle must be on level ground and at a complete standstill. Any vehicle movement results in false values for this test.
   • Access the ABS and monitor the LAT_ACCL (ACC) PID.
   • the LAT_ACCL PID value between -0.4 and 0.4? 

     Yes	No
     Go to  L8.	Go to  L9.

8. L8: CHECK THE ABS MODULE LONGITUDINAL ACCELERATION (LNG_ACCL) PID 
   NOTE: The vehicle must be on level ground and at a complete standstill. Any vehicle movement results in false values for this test.
   • Access the ABS and monitor the LONG_ACCL (ACC) PID.
   • Is the LNG_ACCL PID value between -0.4 and 0.4? 

     Yes	No
     Go to  L10.	Go to  L9.

9. L9: 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 specifications.
   • Inspect the RCM mounting surface for damage, corrosion and dirt.
   • Is the RCM installed correctly and is the mounting surface clean and free from damage? 

     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 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.

     CLEAR or REPAIR the RCM mounting surface as necessary. CORRECTLY INSTALL the RCM and TIGHTEN the fasteners to the correct toque specification. REFER to Supplemental Restraint System article

10. L10: CHECK FOR CORRECT SASM OPERATION 
    • Ignition OFF.
    • 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_A connector connected. (C310A) Make sure the connector seats and latches correctly.
    • RCM_B connector connected. (C310B) Make sure the connector seats and latches correctly.
    • Operate the system and determine if the concern is still present.
    • 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 service articles address this concern, INSTALL a new SASM. Refer to Steering Column Switches article	The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.