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Home >> Lincoln >> 2009 >> MKX FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 2100 (Supplemental Restraint System) >> Diagnostic Tests >> Air Bag and Safety Belt Pretensioner Supplemental Restraint System (SRS) >> Pinpoint Tests >> Pinpoint Test M: DTC B2296 - Restraint System - Impact Sensor Fault >> Pinpoint Test M: DTC B2296 - Restraint System - Impact Sensor Fault

Pinpoint Test M: DTC B2296 - Restraint System - Impact Sensor Fault

WARNING: This page is about a different car, the 2010 Lincoln Town Car. However, it is still accessible from the selected car via links, so may be relevant.
WARNING: Remove restraint system diagnostic tools from the vehicle prior to road testing. If tools are not removed, the supplemental restraint system (SRS) device may not deploy in a crash. Failure to follow this instruction may result in serious personal injury or death in a crash and possibly violate vehicle safety standards.
WARNING: Always tighten the fasteners of the restraints control module (RCM) and impact sensor (if equipped) to the specified torque. Failure to do so may result in incorrect restraint system operation, which increases the risk of personal injury or death in a crash.
NOTE: Use the correct probe adapter(s) when taking measurements. Failure to use the correct probe adapter(s) may damage the connector.
NOTE: The supplemental restraint system (SRS) must be fully operational and free of faults before releasing the vehicle to the customer.
NOTE: SRS components should only be disconnected or reconnected when instructed to do so within a pinpoint test step. Failure to follow this instruction may result in incorrect diagnosis of the SRS. 
NOTE: Most faults are due to connector and/or wiring concerns. Carry out a thorough inspection and verification before proceeding with the pinpoint test.
  1. M1 CHECK FOR ON-DEMAND AND CONTINUOUS DTCs 
    • Enter the following diagnostic mode on the diagnostic tool: Self Test/ RCM/ Retrieve and Record On-Demand and Continuous Memory DTCs
    • Enter the following diagnostic mode on the diagnostic tool: DataLogger/ RCM/ View and Record All B2296 Fault PIDs
      • Refer to PID list in Normal Operation to view B2296 fault PIDs.
    • Do any on-demand B2296 fault PIDs indicate a fault? 
    1. YES  : This is a hard fault. The fault condition is still present. This fault cannot be cleared until it is corrected and the DTC is no longer retrieved during the on-demand self test.

      Using the fault PIDs recorded, go to the appropriate pinpoint test step.

      For 2296_31_OD (Side Crash Sensor Mount or Communication Fault, Front Driver Side) (LFC 4-12), go to  M2.

      For 2296_17_OD (Side Crash Sensor Communication Fault, Front Driver Side) (LFC 4-3), go to  M8.

      For 2296_30_OD (Side Crash Sensor Internal Fault, Front Driver Side) (LFC 6-2), INSTALL a new driver side impact sensor. REFER to Side Impact Sensor . Go to  M44.

      For 2296_16_OD (Side Crash Sensor Circuit Short to Ground, Front Driver Side) (LFC 6-7), go to  M7.

      For 2296_15_OD (Side Crash Sensor Circuit Short to Battery, Front Driver Side) (LFC 6-12), go to  M6.

      For 2296_29_OD (Side Crash Sensor Mount or Communication Fault, Front Passenger Side) (4-13), go to  M12.

      For 2296_14_OD (Side Crash Sensor Communication Fault, Front Passenger Side) (LFC 4-4), go to  M18.

      For 2296_28_OD (Side Crash Sensor Internal Fault, Front Passenger Side) (LFC 6-3), INSTALL a new first row passenger side impact sensor. REFER to Side Impact Sensor . Go to  M44.

      For 2296_13_OD (Side Crash Sensor Circuit Short to Ground, Front Passenger Side) (LFC 6-8), go to  M17.

      For 2296_12_OD (Side Crash Sensor Circuit Short to Battery, Front Passenger Side) (LFC 6-13), go to  M16.

      For 2296_19_OD (Driver/Center Front Crash Sensor Mount/Communication Fault) (LFC 4-11), go to  M22.

      For 2296_5_OD (Driver/Center Front Crash Sensor Communication Fault) (LFC 4-2), go to  M28.

      For 2296_18_OD (Driver/Center Front Crash Sensor Internal Fault) (LFC 6-1), INSTALL a new front impact severity sensor. REFER to Front Impact Severity Sensor . Go to  M44.

      For 2296_4_OD (Driver/Center Front Crash Sensor Circuit Short to Ground) (LFC 6-6), go to  M27.

      For 2296_3_OD (Driver/Center Front Crash Sensor Circuit Short to Battery) (LFC 6-11), go to  M26.

      For 2296_59_OD (Passenger Front Crash Sensor Mount or Communication Fault) (LFC 12-2), go to  M32.

      For 2296_57_OD (Passenger Front Crash Sensor Communication Fault) (LFC 12-4), go to  M38.

      For 2296_58_OD (Passenger Front Crash Sensor Internal Fault) (LFC 12-3), INSTALL a new RH front impact severity sensor. REFER to Front Impact Severity Sensor . Go to  M44.

      For 2296_56_OD (Passenger Front Crash Sensor Circuit Short to Ground) (LFC 12-5), go to  M37.

      For 2296_55_OD (Passenger Front Crash Sensor Circuit Short to Battery) (LFC12-6), go to  M36.

    2. NO  : This is an intermittent fault when present as a continuous memory DTC only (DTC not retrieved on demand). The fault condition is not present at this time. Go to  M43.
  2. M2 INSPECT THE DRIVER SIDE IMPACT SENSOR MOUNTING AND MOUNTING SURFACE 
    • Key in OFF position.
    • Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Access the driver side impact sensor. Refer to Side Impact Sensor .
    • Inspect the driver side impact sensor for:
      • a loose electrical connector.
      • a loose sensor mounting bolt.
    • Remove the driver side impact sensor. Refer to Side Impact Sensor .
    • Visually inspect the driver side impact sensor, alignment tabs, electrical connector and mounting surface for damage, corrosion or dirt.
    • Was a significant amount of corrosion or dirt found, was the driver side impact sensor attached to the mounting surface incorrectly or were the impact sensor bolts not fully seated and tightened correctly? 
    1. YES  : CLEAN and TIGHTEN the bolts to the required specification. REPAIR the mounting surface and electrical connections as necessary. REINSTALL the driver side impact sensor. Go to  M44.
    2. NO  : Go to  M3.
  3. M3 INSTALL THE DRIVER SIDE IMPACT SENSOR AND CARRY OUT THE ON-DEMAND SELF TEST 
    • Clean and repair the mounting surface as necessary.
    • Clean the driver side impact sensor mounting bolts.
    • Install the driver side impact sensor and tighten to the required specification.
    • Repower the SRS. Do not  prove out the SRS at this time. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Enter the following diagnostic mode on the diagnostic tool: Self Test/ RCM/ Retrieve and Record On-Demand and Continuous Memory DTCs
    • Enter the following diagnostic mode on the diagnostic tool: DataLogger/ RCM/ View and Record All B2296 Fault PIDs
      • Refer to PID list in Normal Operation to view B2296 fault PIDs.
    • Do any on-demand B2296 fault PIDs indicate a fault? 
    1. YES  : Go to  M4.
    2. NO  : Fault corrected. Go to  M44.
  4. M4 CHECK THE DRIVER SIDE IMPACT SENSOR GROUND CIRCUIT 1262 (BN/LG) FOR HIGH RESISTANCE 
    • Key in OFF position.
    • Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Disconnect: Driver Side Impact Sensor C305
      • Fig 1: Measuring Resistance
      GF0013358Courtesy of FORD MOTOR CO.
    • Measure the resistance between driver side impact sensor C305-2, circuit 1262 (BN/LG), harness side and the driver side impact sensor case ground bolt.
    • Is the resistance less than 100 ohms? 
    1. YES  : Go to  M11.
    2. NO  : Go to  M5.
  5. M5 CLEAN THE DRIVER SIDE IMPACT SENSOR MOUNTING SURFACE AND CARRY OUT THE ON-DEMAND SELF TEST 
    • Remove the driver side impact sensor. Refer to Side Impact Sensor .
    • Clean and repair the mounting surface as necessary.
    • Clean the driver side impact sensor mounting bolts.
    • Install the driver side impact sensor and tighten to specifications.
    • Repower the SRS. Do not  prove out the SRS at this time. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Enter the following diagnostic mode on the diagnostic tool: Self Test/ RCM/ Retrieve and Record On-Demand and Continuous Memory DTCs
    • Enter the following diagnostic mode on the diagnostic tool: DataLogger/ RCM/ View and Record All B2296 Fault PIDs
      • Refer to PID list in Normal Operation to view B2296 fault PIDs.
    • Do any on-demand B2296 fault PIDs indicate a fault? 
    1. YES  : Go to  M11.
    2. NO  : Fault corrected. Go to  M44.
  6. M6 CHECK CIRCUITS 1261 (WH/LG) AND 1262 (BN/LG) FOR A SHORT TO VOLTAGE BETWEEN THE DRIVER SIDE IMPACT SENSOR AND RCM 
    1. YES  : REPAIR circuit 1261 (WH/LG) or circuit 1262 (BN/LG). Go to  M44.
    2. NO  : Go to  M11.
  7. M7 CHECK CIRCUITS 1261 (WH/LG) AND 1262 (BN/LG) FOR A SHORT TO GROUND BETWEEN THE DRIVER SIDE IMPACT SENSOR AND RCM 
    • Key in OFF position.
    • Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Disconnect: Driver Side Impact Sensor C305
    • Disconnect: RCM C310a and C310b
    • Measure the resistance between driver side impact sensor C305-2, circuit 1262 (BN/LG), harness side and ground; and between C305-1, circuit 1261 (WH/LG), harness side and ground.
    • Are the resistances greater than 10,000 ohms? 
    1. YES  : Go to  M11.
    2. NO  : REPAIR circuit 1261 (WH/LG) or circuit 1262 (BN/LG). Go to  M44.
  8. M8 CHECK CIRCUIT 1261 (WH/LG) FOR AN OPEN BETWEEN THE RCM AND DRIVER SIDE IMPACT SENSOR 
    • Key in OFF position.
    • Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Disconnect: Driver Side Impact Sensor C305
    • Disconnect: RCM C310a and C310b
      • Fig 2: Measuring Resistance
      GF0013359Courtesy of FORD MOTOR CO.
    • Measure the resistance between RCM C310b-27, circuit 1261 (WH/LG), harness side and driver side impact sensor C305-1, circuit 1261 (WH/LG), harness side.
    • Is the resistance less than 0.5 ohm? 
    1. YES  : Go to  M9.
    2. NO  : REPAIR circuit 1261 (WH/LG). Go to  M44.
  9. M9 CHECK CIRCUIT 1262 (BN/LG) FOR AN OPEN BETWEEN THE RCM AND DRIVER SIDE IMPACT SENSOR 
      Fig 3: Measuring Resistance
      GF0013360Courtesy of FORD MOTOR CO.
    • Measure the resistance between RCM C310b-28, circuit 1262 (BN/LG), harness side and driver side impact sensor C305-2, circuit 1262 (BN/LG), harness side.
    • Is the resistance less than 0.5 ohm? 
    1. YES  : Go to  M10.
    2. NO  : REPAIR circuit 1262 (BN/LG). Go to  M44.
  10. M10 CHECK CIRCUIT 1261 (WH/LG) FOR A SHORT TO CIRCUIT 1262 (BN/LG) BETWEEN THE RCM AND DRIVER SIDE IMPACT SENSOR 
    • Measure the resistance between driver side impact sensor C305-1, circuit 1261 (WH/LG), and C305-2, circuit 1262 (BN/LG), harness side.
    • Is the resistance greater than 10,000 ohms? 
    1. YES  : Go to  M11.
    2. NO  : REPAIR circuits 1261 (WH/LG) and 1262 (BN/LG). Go to  M44.
  11. M11 CHECK THE DRIVER SIDE IMPACT SENSOR 
    • Key in OFF position.
    • Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Connect: RCM C310a and C310b
    • Install a known good driver side impact sensor. Refer to Side Impact Sensor .
    • Repower the SRS. Do not  prove out the SRS at this time. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Enter the following diagnostic mode on the diagnostic tool: Self Test/ RCM/ Retrieve and Record On-Demand and Continuous Memory DTCs
    • Enter the following diagnostic mode on the diagnostic tool: DataLogger/ RCM/ View and Record All B2296 Fault PIDs
      • Refer to PID list in Normal Operation to view B2296 fault PIDs.
    • Were any on-demand fault PIDs for the driver side impact sensor indicating a fault? 
    1. YES  : Go to  M42.
    2. NO  : Fault corrected. Go to  M44.
  12. M12 INSPECT THE PASSENGER SIDE IMPACT SENSOR MOUNTING AND MOUNTING SURFACE 
    • Key in OFF position.
    • Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Access the passenger side impact sensor. Refer to Side Impact Sensor .
    • Inspect the passenger side impact sensor for:
      • a loose electrical connector.
      • a loose sensor mounting bolt.
    • Remove the passenger side impact sensor. Refer to Side Impact Sensor .
    • Visually inspect the passenger side impact sensor, alignment tabs, electrical connector and mounting surface for damage, corrosion or dirt.
    • Was a significant amount of corrosion or dirt found, was the passenger side impact sensor attached to the mounting surface incorrectly or were the sensor bolts not fully seated and tightened correctly? 
    1. YES  : CLEAN and TIGHTEN the bolts to required specifications. REPAIR the mounting surface and electrical connections as necessary. REINSTALL the passenger side impact sensor. Go to  M44.
    2. NO  : Go to  M13.
  13. M13 INSTALL THE PASSENGER SIDE IMPACT SENSOR AND CARRY OUT THE ON-DEMAND SELF TEST 
    • Clean and repair the mounting surface as necessary.
    • Clean the passenger side impact sensor mounting bolts.
    • Install the passenger side impact sensor and tighten to the required specification.
    • Repower the SRS. Do not  prove out the SRS at this time. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Enter the following diagnostic mode on the diagnostic tool: Self Test/ RCM/ Retrieve and Record On-Demand and Continuous Memory DTCs
    • Enter the following diagnostic mode on the diagnostic tool: DataLogger/ RCM/ View and Record All B2296 Fault PIDs
      • Refer to PID list in Normal Operation to view B2296 fault PIDs.
    • Do any on-demand B2296 fault PIDs indicate a fault? 
    1. YES  : Go to  M14.
    2. NO  : Fault corrected. Go to  M44.
  14. M14 CHECK THE PASSENGER SIDE IMPACT SENSOR GROUND CIRCUIT 1264 (BN) FOR HIGH RESISTANCE 
    • Key in OFF position.
    • Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Disconnect: Passenger Side Impact Sensor C304
      • Fig 4: Measuring Resistance
      GF0013358Courtesy of FORD MOTOR CO.
    • Measure the resistance between passenger side impact sensor C304-2, circuit 1264 (BN), harness side and passenger side impact sensor case ground bolt.
    • Is the resistance less than 100 ohms? 
    1. YES  : Go to  M21.
    2. NO  : Go to  M15.
  15. M15 CLEAN FIRST ROW PASSENGER SIDE IMPACT SENSOR MOUNTING SURFACE AND CARRY OUT THE ON-DEMAND SELF TEST 
    • Remove the passenger side impact sensor. Refer to Side Impact Sensor .
    • Clean and repair the mounting surface as necessary.
    • Clean the passenger side impact sensor mounting bolts.
    • Install the passenger side impact sensor and tighten to the required specification.
    • Repower the SRS. Do not  prove out the SRS at this time. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Enter the following diagnostic mode on the diagnostic tool: Self Test/ RCM/ Retrieve and Record On-Demand and Continuous Memory DTCs
    • Enter the following diagnostic mode on the diagnostic tool: DataLogger/ RCM/ View and Record All B2296 Fault PIDs
      • Refer to PID list in Normal Operation to view B2296 fault PIDs.
    • Do any on-demand B2296 fault PIDs indicate a fault? 
    1. YES  : Go to  M21.
    2. NO  : Fault corrected. Go to  M44.
  16. M16 CHECK CIRCUITS 1264 (BN) AND 1263 (WH) FOR A SHORT TO VOLTAGE BETWEEN THE PASSENGER SIDE IMPACT SENSOR AND RCM 
    1. YES  : REPAIR circuit 1264 (BN) or circuit 1263 (WH). Go to  M44.
    2. NO  : Go to  M21.
  17. M17 CHECK CIRCUITS 1264 (BN) AND 1263 (WH) FOR A SHORT TO GROUND BETWEEN THE PASSENGER SIDE IMPACT SENSOR AND RCM 
    • Key in OFF position.
    • Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Disconnect: Passenger Side Impact Sensor C304
    • Disconnect: RCM C310a and C310b
    • Measure the resistance between passenger side impact sensor C304-2, circuit 1264 (BN), harness side and ground; and between C304-1, circuit 1263 (WH), harness side and ground.
    • Are the resistances greater than 10,000 ohms? 
    1. YES  : Go to  M21.
    2. NO  : REPAIR circuit 1264 (BN) or circuit 1263 (WH). Go to  M44.
  18. M18 CHECK CIRCUIT 1264 (BN) FOR AN OPEN BETWEEN THE RCM AND PASSENGER SIDE IMPACT SENSOR 
    • Key in OFF position.
    • Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Disconnect: Passenger Side Impact Sensor C304
    • Disconnect: RCM C310a and C310b
      • Fig 5: Measuring Resistance
      GF0013361Courtesy of FORD MOTOR CO.
    • Measure the resistance between RCM C310b-30, circuit 1264 (BN), harness side and passenger side impact sensor C304-2, circuit 1264 (BN), harness side.
    • Is the resistance less than 0.5 ohm? 
    1. YES  : Go to  M19.
    2. NO  : REPAIR circuit 1264 (BN). Go to  M44.
  19. M19 CHECK CIRCUIT 1263 (WH) FOR AN OPEN BETWEEN THE RCM AND PASSENGER SIDE IMPACT SENSOR 
      Fig 6: Measuring Resistance
      GF0013362Courtesy of FORD MOTOR CO.
    • Measure the resistance between RCM C310b-29, circuit 1263 (WH), harness side and passenger side impact sensor C304-1, circuit 1263 (WH), harness side.
    • Is the resistance less than 0.5 ohm? 
    1. YES  : Go to  M20.
    2. NO  : REPAIR circuit 1263 (WH). Go to  M44.
  20. M20 CHECK CIRCUIT 1264 (BN) FOR A SHORT TO CIRCUIT 1263 (WH) BETWEEN THE RCM AND PASSENGER SIDE IMPACT SENSOR 
    • Measure the resistance between passenger side impact sensor C304-2, circuit 1264 (BN), harness side and C304-1, circuit 1263 (WH), harness side.
    • Is the resistance greater than 10,000 ohms? 
    1. YES  : Go to  M21.
    2. NO  : REPAIR short between circuits 1264 (BN) and 1263 (WH). Go to  M44.
  21. M21 CHECK THE PASSENGER SIDE IMPACT SENSOR 
    • Key in OFF position.
    • Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Connect: RCM C310a and C310b
    • Install a known good passenger side impact sensor. Refer to Side Impact Sensor .
    • Repower the SRS. Do not  prove out the SRS at this time. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Enter the following diagnostic mode on the diagnostic tool: Self Test/ RCM/ Retrieve and Record On-Demand and Continuous Memory DTCs
    • Enter the following diagnostic mode on the diagnostic tool: DataLogger/ RCM/ View and Record All B2296 Fault PIDs
      • Refer to PID list in Normal Operation to view B2296 fault PIDs.
    • Were any on-demand fault PIDs the for passenger side impact sensor indicating a fault? 
    1. YES  : Go to  M42.
    2. NO  : Fault corrected. Go to  M44.
  22. M22 INSPECT THE LH FRONT IMPACT SEVERITY SENSOR MOUNTING AND MOUNTING SURFACE 
    • Key in OFF position.
    • Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Access the LH front impact severity sensor. Refer to Front Impact Severity Sensor .
    • Inspect the LH front impact severity sensor for:
      • a loose electrical connector.
      • a loose sensor mounting nut.
    • Remove the LH front impact severity sensor. Refer to Front Impact Severity Sensor .
    • Visually inspect the LH front impact severity sensor, alignment tabs, electrical connector and mounting surface for damage, corrosion or dirt.
    • Was a significant amount of corrosion or dirt found, was the LH front severity impact sensor attached to the mounting surface incorrectly or were the sensor bolts not fully seated and tightened correctly? 
    1. YES  : CLEAN and TIGHTEN bolts to the required specification or REPAIR the mounting surface as necessary. REINSTALL the LH front impact severity sensor. Go to  M44.
    2. NO  : Go to  M23.
  23. M23 INSTALL THE LH FRONT IMPACT SEVERITY SENSOR AND CARRY OUT THE ON-DEMAND SELF TEST 
    • Clean and repair the mounting surface as necessary.
    • Clean the LH front impact severity sensor mounting bolts.
    • Install the LH front impact severity sensor. Refer to Front Impact Severity Sensor .
    • Repower the SRS. Do not  prove out the SRS at this time. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Enter the following diagnostic mode on the diagnostic tool: Self Test/ RCM/ Retrieve and Record On-Demand and Continuous Memory DTCs
    • Enter the following diagnostic mode on the diagnostic tool: DataLogger/ RCM/ View and Record All B2296 Fault PIDs
      • Refer to PID list in Normal Operation to view B2296 fault PIDs.
    • Do any on-demand B2296 fault PIDs indicate a fault? 
    1. YES  : Go to  M24.
    2. NO  : Fault corrected. Go to  M44.
  24. M24 CHECK THE LH FRONT IMPACT SEVERITY SENSOR GROUND CIRCUIT 618 (VT/LG) FOR HIGH RESISTANCE 
    • Key in OFF position.
    • Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Disconnect: LH Front Impact Severity Sensor C1465
    • Measure the resistance between the LH front impact severity sensor C1465-2, circuit 618 (VT/LG), harness side and driver front impact severity sensor case ground.
    • Is the resistance less than 100 ohms? 
    1. YES  : Go to  M31.
    2. NO  : Go to  M25.
  25. M25 CLEAN THE LH FRONT IMPACT SEVERITY SENSOR MOUNTING SURFACE AND CARRY OUT THE ON-DEMAND SELF TEST 
    • Remove the LH front impact severity sensor. Refer to Front Impact Severity Sensor .
    • Clean and repair the mounting surface as necessary.
    • Clean the LH front impact severity sensor mounting bolts.
    • Install the LH front impact severity sensor. Refer to Front Impact Severity Sensor .
    • Repower the SRS. Do not  prove out the SRS at this time. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Enter the following diagnostic mode on the diagnostic tool: Self Test/ RCM/ Retrieve and Record On-Demand and Continuous Memory DTCs
    • Enter the following diagnostic mode on the diagnostic tool: DataLogger/ RCM/ View and Record All B2296 Fault PIDs
      • Refer to PID list in Normal Operation to view B2296 fault PIDs.
    • Do any on-demand B2296 fault PIDs indicate a fault? 
    1. YES  : Go to  M31.
    2. NO  : Fault corrected. Go to  M44.
  26. M26 CHECK CIRCUITS 617 (PK/OG) AND 618 (VT/LG) FOR A SHORT TO VOLTAGE BETWEEN THE RCM AND LH FRONT IMPACT SEVERITY SENSOR 
    1. YES  : REPAIR circuit 617 (PK/OG) or circuit 618 (VT/LG). Go to  M44.
    2. NO  : Go to  M31.
  27. M27 CHECK CIRCUITS 617 (PK/OG) AND 618 (VT/LG) FOR A SHORT TO GROUND BETWEEN THE RCM AND LH FRONT IMPACT SEVERITY SENSOR 
    • Key in OFF position.
    • Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Disconnect: LH Front Impact Severity Sensor C1465
    • Disconnect: RCM C310a and C310b
    • Measure the resistance between LH front impact severity sensor C1465-1, circuit 617 (PK/OG), harness side and ground; and between LH front impact severity sensor C1465-2, circuit 618 (VT/LG), harness side and ground.
    • Are the resistances greater than 10,000 ohms? 
    1. YES  : Go to  M31.
    2. NO  : REPAIR circuits 617 (PK/OG) or 618 (VT/LG). Go to  M44.
  28. M28 CHECK CIRCUIT 617 (PK/OG) FOR AN OPEN BETWEEN THE RCM AND LH FRONT IMPACT SEVERITY SENSOR 
    • Key in OFF position.
    • Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Disconnect: LH Front Impact Severity Sensor C1465
    • Disconnect: RCM C310a and C310b
      • Fig 7: Measuring Resistance
      GF0013363Courtesy of FORD MOTOR CO.
    • Measure the resistance between RCM C310b-19, circuit 617 (PK/OG), harness side and LH front impact severity sensor C1465-1, circuit 617 (PK/OG), harness side.
    • Is the resistance less than 0.5 ohm? 
    1. YES  : Go to  M29.
    2. NO  : REPAIR circuit 617 (PK/OG). Go to  M44.
  29. M29 CHECK CIRCUIT 618 (VT/LG) FOR AN OPEN BETWEEN THE RCM AND LH FRONT IMPACT SEVERITY SENSOR 
      Fig 8: Measuring Resistance
      GF0013364Courtesy of FORD MOTOR CO.
    • Measure the resistance between RCM C310b-20, circuit 618 (VT/LG), harness side and LH front impact severity sensor C1465-2, circuit 618 (VT/LG), harness side.
    • Is the resistance less than 0.5 ohm? 
    1. YES  : Go to  M30.
    2. NO  : REPAIR circuit 618 (VT/LG). Go to  M44.
  30. M30 CHECK CIRCUIT 617 (PK/OG) FOR A SHORT TO CIRCUIT 618 (VT/LG) BETWEEN THE RCM AND LH FRONT IMPACT SEVERITY SENSOR 
    • Measure the resistance between LH front impact severity sensor C1465-1, circuit 617 (PK/OG), harness side and LH front impact severity sensor C1465-2, circuit 618 (VT/LG), harness side.
    • Is the resistance greater than 10,000 ohms? 
    1. YES  : Go to  M31.
    2. NO  : REPAIR circuits 617 (PK/OG) and 618 (VT/LG). Go to  M44.
  31. M31 CHECK THE LH FRONT IMPACT SEVERITY SENSOR 
    • Key in OFF position.
    • Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Connect: RCM C310a and C310b
    • Install a known good LH front impact severity sensor. Refer to Front Impact Severity Sensor .
    • Repower the SRS. Do not  prove out the SRS at this time. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Enter the following diagnostic mode on the diagnostic tool: Self Test/ RCM/ Retrieve and Record On-Demand and Continuous Memory DTCs
    • Enter the following diagnostic mode on the diagnostic tool: DataLogger/ RCM/ View and Record All B2296 Fault PIDs
      • Refer to PID list in Normal Operation to view B2296 fault PIDs.
    • Were any on-demand fault PIDs for the LH front impact severity sensor indicating a fault? 
    1. YES  : Go to  M42.
    2. NO  : Fault corrected. Go to  M44.
  32. M32 INSPECT THE RH FRONT IMPACT SEVERITY SENSOR MOUNTING AND MOUNTING SURFACE 
    • Key in OFF position.
    • Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Access the RH front impact severity sensor. Refer to Front Impact Severity Sensor .
    • Inspect the RH front impact severity sensor for:
      • a loose electrical connector.
      • a loose sensor mounting nut.
    • Remove the RH front impact severity sensor. Refer to Front Impact Severity Sensor .
    • Visually inspect the RH front impact severity sensor, alignment tabs, electrical connector and mounting surface for damage, corrosion or dirt.
    • Was a significant amount of corrosion or dirt found, was the RH front severity impact sensor attached to the mounting surface incorrectly or were the sensor bolts not fully seated and tightened correctly? 
    1. YES  : CLEAN and TIGHTEN bolts to required the specification or REPAIR the mounting surface as necessary. REINSTALL the RH front impact severity sensor. Go to  M44.
    2. NO  : Go to  M33.
  33. M33 INSTALL THE RH FRONT IMPACT SEVERITY SENSOR AND CARRY OUT THE ON-DEMAND SELF TEST 
    • Clean and repair the mounting surface as necessary.
    • Clean the RH front impact severity sensor mounting bolts.
    • Install the RH front impact severity sensor. Refer to Front Impact Severity Sensor .
    • Repower the SRS. Do not  prove out the SRS at this time. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Enter the following diagnostic mode on the diagnostic tool: Self Test/ RCM/ Retrieve and Record On-Demand and Continuous Memory DTCs
    • Enter the following diagnostic mode on the diagnostic tool: DataLogger/ RCM/ View and Record All B2296 Fault PIDs
      • Refer to PID list in Normal Operation to view B2296 fault PIDs.
    • Do any on-demand B2296 fault PIDs indicate a fault? 
    1. YES  : Go to  M34.
    2. NO  : Fault corrected. Go to  M44.
  34. M34 CHECK THE RH FRONT IMPACT SEVERITY SENSOR GROUND CIRCUIT 620 (VT/LB) FOR HIGH RESISTANCE 
    • Key in OFF position.
    • Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Disconnect: RH Front Impact Severity Sensor C1466
    • Measure the resistance between RH front impact severity sensor C1466-2, circuit 620 (VT/LB), harness side and RH front impact severity sensor case ground.
    • Is the resistance less than 100 ohms? 
    1. YES  : Go to  M41.
    2. NO  : Go to  M35.
  35. M35 CLEAN THE RH FRONT IMPACT SEVERITY SENSOR MOUNTING SURFACE AND CARRY OUT THE ON-DEMAND SELF TEST 
    • Remove the RH front impact severity sensor. Refer to Front Impact Severity Sensor .
    • Clean and repair the mounting surface as necessary.
    • Clean the RH front impact severity sensor mounting nuts.
    • Install the RH front impact severity sensor. Refer to Front Impact Severity Sensor .
    • Repower the SRS. Do not  prove out the SRS at this time. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Enter the following diagnostic mode on the diagnostic tool: Self Test/ RCM/ Retrieve and Record On-Demand and Continuous Memory DTCs
    • Enter the following diagnostic mode on the diagnostic tool: DataLogger/ RCM/ View and Record All B2296 Fault PIDs
      • Refer to PID list in Normal Operation to view B2296 fault PIDs.
    • Do any on-demand B2296 fault PIDs indicate a fault? 
    1. YES  : Go to  M41.
    2. NO  : Fault corrected. Go to  M44.
  36. M36 CHECK CIRCUITS 619 (PK/WH) AND 620 (VT/LB) FOR A SHORT TO VOLTAGE BETWEEN THE RCM AND RH FRONT IMPACT SEVERITY SENSOR 
    1. YES  : REPAIR circuit 619 (PK/WH) or circuit 620 (VT/LB). Go to  M44.
    2. NO  : Go to  M41.
  37. M37 CHECK CIRCUITS 619 (PK/WH) AND 620 (VT/LB) FOR A SHORT TO GROUND BETWEEN THE RCM AND RH FRONT IMPACT SEVERITY SENSOR 
    • Key in OFF position.
    • Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Disconnect: RH Front Impact Severity Sensor C1466
    • Disconnect: RCM C310a and C310b
    • Measure the resistance between RH front impact severity sensor C1466-1, circuit 619 (PK/WH), harness side and ground; and between RH front impact severity sensor C1466-2, circuit 620 (VT/LB), harness side and ground.
    • Are the resistances greater than 10,000 ohms? 
    1. YES  : Go to  M41.
    2. NO  : REPAIR circuit 619 (PK/WH) or circuit 620 (VT/LB). Go to  M44.
  38. M38 CHECK CIRCUIT 619 (PK/WH) FOR AN OPEN BETWEEN THE RCM AND RH FRONT IMPACT SEVERITY SENSOR 
    • Key in OFF position.
    • Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Disconnect: RH Front Impact Severity Sensor C1466
    • Disconnect: RCM C310a and C310b
      • Fig 9: Measuring Resistance
      GF0013363Courtesy of FORD MOTOR CO.
    • Measure the resistance between RCM C310b-19, circuit 619 (PK/WH), harness side and RH front impact severity sensor C1466-1, circuit 619 (PK/WH), harness side.
    • Is the resistance less than 0.5 ohm? 
    1. YES  : Go to  M39.
    2. NO  : REPAIR circuit 619 (PK/WH). Go to  M44.
  39. M39 CHECK CIRCUIT 620 (VT/LB) FOR AN OPEN BETWEEN THE RCM AND RH FRONT IMPACT SEVERITY SENSOR 
      Fig 10: Measuring Resistance
      GF0013364Courtesy of FORD MOTOR CO.
    • Measure the resistance between RCM C310b-20, circuit 620 (VT/LB), harness side and RH front impact severity sensor C1466-2, circuit 620 (VT/LB), harness side.
    • Is the resistance less than 0.5 ohm? 
    1. YES  : Go to  M40.
    2. NO  : REPAIR circuit 620 (VT/LB). Go to  M44.
  40. M40 CHECK CIRCUIT 619 (PK/WH) FOR A SHORT TO CIRCUIT 620 (VT/LB) BETWEEN THE RCM AND THE RH FRONT IMPACT SEVERITY SENSOR 
    • Measure the resistance between RH front impact severity sensor C1466-1, circuit 619 (PK/WH), harness side and RH front impact severity sensor C1466-2, circuit 620 (VT/LB), harness side.
    • Is the resistance greater than 10,000 ohms? 
    1. YES  : Go to  M41.
    2. NO  : REPAIR circuits 619 (PK/WH) and 620 (VT/LB). Go to  M44.
  41. M41 CHECK THE FRONT IMPACT SEVERITY SENSOR 
    • Key in OFF position.
    • Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Connect: RCM C310a and C310b
    • Install a known good RH front impact severity sensor. Refer to Front Impact Severity Sensor .
    • Repower the SRS. Do not  prove out the SRS at this time. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Key in ON position.
    • Enter the following diagnostic mode on the diagnostic tool: Self Test/ RCM/ Retrieve and Record On-Demand and Continuous Memory DTCs
    • Enter the following diagnostic mode on the diagnostic tool: DataLogger/ RCM/ View and Record All B2296 Fault PIDs
      • Refer to PID list in Normal Operation to view B2296 fault PIDs.
    • Were any on-demand fault PIDs for the RH front impact severity sensor indicating a fault? 
    1. YES  : Go to  M42.
    2. NO  : Fault corrected. Go to  M44.
  42. M42 CONFIRM THE RCM FAULT 
    NOTE: Make sure all restraint system diagnostic tools, sensor electrical connectors and the RCM electrical connectors are connected before carrying out the self test. If not, erroneous DTCs will be recorded.
    • Key in OFF position.
    • Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Install the original impact sensor.
    • Repower the SRS. Do not  prove out the SRS at this time. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Enter the following diagnostic mode on the diagnostic tool: Self Test/ RCM/ Retrieve and Record On-Demand and Continuous Memory DTCs
    • Enter the following diagnostic mode on the diagnostic tool: DataLogger/ RCM/ View and Record All B2296 Fault PIDs
      • Refer to PID list in Normal Operation to view B2296 fault PIDs.
    • Do any on-demand B2296 fault PIDs indicate a fault? 
    1. YES  : INSTALL a new RCM. Go to  M44.
    2. NO  : In the process of diagnosing the fault, the fault condition has become intermittent. CHECK for causes of the intermittent fault in the areas previously worked in, particularly the pins and terminals of electrical connectors that were disconnected. ATTEMPT to recreate the hard fault by flexing the wire harness and cycling the ignition key frequently. Do not install any new SRS components at this time. SRS components should only be installed when directed to do so in the pinpoint test.  REPAIR any intermittent wiring, terminal or connector concerns found. Go to  M44.
  43. M43 CHECK FOR AN INTERMITTENT FAULT 
    • Enter the following diagnostic mode on the diagnostic tool: Self Test/ RCM/ Retrieve and Record On-Demand and Continuous Memory DTCs
    • Enter the following diagnostic mode on the diagnostic tool: DataLogger/ RCM/ View and Record All B2296 Fault PIDs
      • Refer to PID list in Normal Operation to view B2296 fault PIDs.
    • Do any on-demand B2296 fault PIDs indicate a fault? 
    1. YES  : This is a hard fault. The fault condition is still present. This fault cannot be cleared until it is corrected and the DTC is no longer retrieved during the on-demand self test.

      Using the fault PIDs recorded, go to the appropriate pinpoint test step.

      For 2296_31_OD (Side Crash Sensor Mount or Communication Fault, Front Driver Side) (LFC 4-12), go to  M2.

      For 2296_17_OD (Side Crash Sensor Communication Fault, Front Driver Side) (LFC 4-3), go to  M8.

      For 2296_30_OD (Side Crash Sensor Internal Fault, Front Driver Side) (LFC 6-2), INSTALL a new driver side impact sensor. REFER to Side Impact Sensor . Go to  M44.

      For 2296_16_OD (Side Crash Sensor Circuit Short to Ground, Front Driver Side) (LFC 6-7), go to  M7.

      For 2296_15_OD (Side Crash Sensor Circuit Short to Battery, Front Driver Side) (LFC 6-12), go to  M6.

      For 2296_29_OD (Side Crash Sensor Mount or Communication Fault, Front Passenger Side) (4-13), go to  M12.

      For 2296_14_OD (Side Crash Sensor Communication Fault, Front Passenger Side) (LFC 4-4), go to  M18.

      For 2296_28_OD (Side Crash Sensor Internal Fault, Front Passenger Side) (LFC 6-3), INSTALL a new first row passenger side impact sensor. REFER to Side Impact Sensor . Go to  M44.

      For 2296_13_OD (Side Crash Sensor Circuit Short to Ground, Front Passenger Side) (LFC 6-8), go to  M17.

      For 2296_12_OD (Side Crash Sensor Circuit Short to Battery, Front Passenger Side) (LFC 6-13), go to  M16.

      For 2296_19_OD (Driver/Center Front Crash Sensor Mount/Communication Fault) (LFC 4-11), go to  M22.

      For 2296_5_OD (Driver/Center Front Crash Sensor Communication Fault) (LFC 4-2), go to  M28.

      For 2296_18_OD (Driver/Center Front Crash Sensor Internal Fault) (LFC 6-1), INSTALL a new front impact severity sensor. REFER to Front Impact Severity Sensor . Go to  M44.

      For 2296_4_OD (Driver/Center Front Crash Sensor Circuit Short to Ground) (LFC 6-6), go to  M27.

      For 2296_3_OD (Driver/Center Front Crash Sensor Circuit Short to Battery) (LFC 6-11), go to  M26.

      For 2296_59_OD (Passenger Front Crash Sensor Mount or Communication Fault) (LFC 12-2), go to  M32.

      For 2296_57_OD (Passenger Front Crash Sensor Communication Fault) (LFC 12-4), go to  M38.

      For 2296_58_OD (Passenger Front Crash Sensor Internal Fault) (LFC 12-3), INSTALL a new RH front impact severity sensor. REFER to Front Impact Severity Sensor . Go to  M44.

      For 2296_56_OD (Passenger Front Crash Sensor Circuit Short to Ground) (LFC 12-5), go to  M37.

      For 2296_55_OD (Passenger Front Crash Sensor Circuit Short to Battery) (LFC12-6), go to  M36.

    2. NO  : CHECK for causes of the intermittent fault. ATTEMPT to recreate the hard fault by flexing the wire harness and cycling the ignition key frequently. ACTIVATE other systems in the same wire harness. Do not install any new SRS components at this time. SRS components should only be installed when directed to do so in the pinpoint test.  REPAIR any intermittent wiring, terminals or connector concerns found. Go to  M44.
  44. M44 CHECK FOR ADDITIONAL SRS DTCs 
    • Key in OFF position.
      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.
    • Reconnect all SRS components (if previously disconnected).
    • If previously directed to depower the SRS, repower the SRS. Do not  prove out the SRS at this time. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Key in ON position.
    • Enter the following diagnostic mode on the diagnostic tool: Self Test/ RCM/ Retrieve and Record On-Demand and Continuous Memory DTCs
    • Enter the following diagnostic mode on the diagnostic tool: Clear all RCM Continuous Memory DTCs
    • Enter the following diagnostic mode on the diagnostic tool: Self Test/RCM
    • Are any RCM DTCs retrieved indicating a fault? 
    1. YES  : Do not clear any DTCs until all DTCs have been resolved. Go to the SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DIAGNOSTIC TROUBLE CODE INDEX  for pinpoint test direction.
    2. NO  : PROVE OUT the SRS. REPAIR is complete. RETURN the vehicle to the customer.
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