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Home >> Mercury >> 2010 >> Milan Base, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 937 (Supplemental Inflatable Restraint System) >> Diagnostic Tests >> Pinpoint Tests - Air Bag and Safety Belt Pretensioner Supplemental Restraint System (SRS) >> Pinpoint Tests >> Pinpoint Test N: LFC 42, 43, 44, 45 and 46/DTC B2296 - Restraint System - Impact Sensor Fault >> Pinpoint Test N: LFC 42, 43, 44, 45 And 46/DTC B2296 - Restraint System - Impact Sensor Fault

Pinpoint Test N: LFC 42, 43, 44, 45 And 46/DTC B2296 - Restraint System - Impact Sensor Fault

WARNING: This page is about a different car, the 2007 Mercury Mariner and 2007 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION: When installing a new restraints control module (RCM), always make sure the correct RCM is being installed. The RCM 40-pin connector is keyed differently for vehicles with safety canopies and side air bags than the 40-pin connector for vehicles without safety canopies and side air bags. Do not force the 40-pin connector onto the RCM. If the connector is forced onto the RCM, damage to the RCM and/or connector will occur.
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. N1 CHECK FOR CONTINUOUS OR ON-DEMAND DTCs 
    WARNING: Restraint system diagnostic tools are for service only. Tools must be removed prior to operating the vehicle over the road. Failure to remove restraint system diagnostic tools could result in injury and possible violation of vehicle safety standards.
    WARNING: Do not handle, move or change the original horizontal mounting position of the restraints control module (RCM) while the RCM is connected and the ignition switch is ON. Failure to follow these instructions may result in the inadvertent deployment of the safety canopy and risk of personal injury.
    WARNING: Never probe the connectors on the air bag module. Doing so can result in air bag deployment, which can result in personal injury.
    WARNING: The safety belt pretensioner is a pyrotechnic device. Always wear safety glasses when repairing an air bag equipped vehicle and when handling a safety belt buckle pretensioner or safety belt retractor pretensioner. Never probe a pretensioner electrical connector. Doing so could result in pretensioner or air bag deployment and could result in personal injury.
    WARNING: Never probe the electrical connector on a safety canopy module. Doing so can result in safety canopy deployment.
    NOTE: If a seat equipped with a supplemental restraint system (SRS) component is being serviced, the SRS must be depowered.
    NOTE: After diagnosing or repairing an SRS, the restraint system diagnostic tools must be removed before operating the vehicle over the road. 
    NOTE: The SRS must be fully operational and free of faults before releasing the vehicle to the customer.
    • Enter the following diagnostic mode on the diagnostic tool: On-Demand Self Test/Retrieve and Record Continuous Memory DTCs
    • Enter the following diagnostic mode on the diagnostic tool: View and Record DTC B2296 Fault PIDs
    • Was on-demand DTC B2296 retrieved? 
    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 first row driver side impact sensor with a mounting/communications fault, go to  N2 .

      For first row driver side impact sensor with an internal fault, INSTALL a new first row driver side impact sensor. REFER to Side Impact Sensor - First Row, B-Pillar . Go to  N54 .

      For first row passenger side impact sensor with a mounting/communications fault, go to  N12 .

      For first row passenger side impact sensor with an internal fault, INSTALL a new first row passenger side impact sensor. REFER to Side Impact Sensor - First Row, B-Pillar . Go to  N54 .

      For second row driver side impact sensor with a mounting/communication fault, go to  N22 .

      For second row driver side impact sensor with an internal fault, INSTALL a new second row driver side impact sensor. REFER to Side Impact Sensor - Second Row, C-Pillar . Go to  N54 .

      For second row passenger side impact sensor with a mounting/communications fault, go to  N32 .

      For second row passenger side impact sensor with an internal fault, INSTALL a new second row passenger side impact sensor. REFER to Side Impact Sensor - Second Row, C-Pillar . Go to  N54 .

      For front impact severity sensor with a mounting/communications fault, go to  N42 .

      For front impact severity sensor with an internal fault, INSTALL a new front impact severity sensor. REFER to Front Impact Severity Sensor . Go to  N54 .

    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  N53 .
  2. N2 INSPECT THE FIRST ROW DRIVER SIDE IMPACT SENSOR MOUNTING SURFACE 
    • Key in OFF position.
    • Depower the system. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Inspect the first row driver side impact sensor mounting and make sure that the retaining bolt is fully seated and tightened correctly.
    • Remove the first row driver side impact sensor.
    • Visually inspect the first row driver side impact sensor and mounting surface for damage, corrosion or dirt.
    • Was a significant amount of corrosion or dirt found, the first row driver side impact sensor attached to the mounting surface incorrectly or was the impact sensor bolt not fully seated and tightened correctly? 
    1. YES  : CLEAN and TIGHTEN the bolt or REPAIR the mounting surface as necessary. REINSTALL the first row driver side impact sensor. Go to  N54 .
    2. NO  : Go to  N3.
  3. N3 INSTALL THE FIRST ROW DRIVER SIDE IMPACT SENSOR AND CARRY OUT THE ON-DEMAND SELF TEST 
    • Clean and repair the mounting surface as necessary.
    • Clean the first row driver side impact sensor mounting bolt.
    • Install the first row driver side impact sensor.
    • Repower the system. Do not  prove out the system at this time. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Enter the following diagnostic mode on the diagnostic tool: On-Demand Self Test/Retrieve and Record Continuous Memory DTCs
    • Enter the following diagnostic mode on the diagnostic tool: View and Record DTC B2296 Fault PIDs
    • Was on-demand DTC B2296 retrieved? 
    1. YES  : Go to  N4.
    2. NO  : Fault corrected. Go to  N54 .
  4. N4 CHECK THE FIRST ROW DRIVER SIDE IMPACT SENSOR GROUND CIRCUIT 1262 (BN/LG) FOR HIGH RESISTANCE 
    • Key in OFF position.
    • Depower the system. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Disconnect: First Row Driver Side Impact Sensor C3209
    • Measure the resistance between first row driver side impact sensor C3209-1, circuit 1262 (BN/LG), harness side and the first row driver side impact sensor case ground.
    • Is the resistance less than 10 ohms? 
    1. YES  : Go to  N6.
    2. NO  : Go to  N5.
  5. N5 CLEAN THE FIRST ROW DRIVER SIDE IMPACT SENSOR MOUNTING SURFACE AND CARRY OUT THE ON-DEMAND SELF TEST 
    • Remove the first row driver side impact sensor.
    • Clean and repair the mounting surface as necessary.
    • Clean the first row driver side impact sensor mounting bolt.
    • Install the first row driver side impact sensor.
    • Repower the system. Do not  prove out the system at this time. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Enter the following diagnostic mode on the diagnostic tool: On-Demand Self Test/Retrieve and Record Continuous Memory DTCs
    • Enter the following diagnostic mode on the diagnostic tool: View and Record DTC B2296 Fault PIDs
    • Was on-demand DTC B2296 retrieved? 
    1. YES  : Go to  N6.
    2. NO  : Fault corrected. Go to  N54 .
  6. N6 CHECK CIRCUIT 1261 (WH/LG) AND CIRCUIT 1262 (BN/LG) FOR A SHORT TO VOLTAGE BETWEEN THE FIRST ROW DRIVER SIDE IMPACT SENSOR AND THE RCM 
    • Key in OFF position.
    • Depower the system. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Disconnect: RCM C2041a and C2041b
    • Disconnect: First Row Driver Side Impact Sensor C3209
    • Repower the system. Do not  prove out the system at this time. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Key in ON position.
      • Fig 1: Checking Circuits For Voltage
      G03903723Courtesy of FORD MOTOR CO.
    • Measure the voltage between first row driver side impact sensor C3209-1, circuit 1262 (BN/LG), harness side and ground; and between C3209-2, circuit 1261 (WH/LG), harness side and ground.
    • Are the voltages less than 0.2 volt? 
    1. YES  : Go to  N7.
    2. NO  : REPAIR circuit 1261 (WH/LG) or circuit 1262 (BN/LG). Go to  N54 .
  7. N7 CHECK CIRCUIT 1261 (WH/LG) AND CIRCUIT 1262 (BN/LG) FOR A SHORT TO GROUND BETWEEN THE FIRST ROW DRIVER SIDE IMPACT SENSOR AND THE RCM 
    • Key in OFF position.
    • Depower the system. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
      • Fig 2: Checking Circuits For Short To Ground
      G03903724Courtesy of FORD MOTOR CO.
    • Measure the resistance between first row driver side impact sensor C3209-1, circuit 1262 (BN/LG), harness side and ground; and between C3209-2, circuit 1261 (WH/LG), harness side and ground.
    • Are the resistances greater than 1,000,000 ohms? 
    1. YES  : Go to  N8.
    2. NO  : REPAIR circuit 1261 (WH/LG) or circuit 1262 (BN/LG). Go to  N54 .
  8. N8 CHECK CIRCUIT 1261 (WH/LG) FOR AN OPEN BETWEEN THE RCM AND THE FIRST ROW DRIVER SIDE IMPACT SENSOR 
      Fig 3: Checking Circuit For Open
      GF0023962Courtesy of FORD MOTOR CO.
    • Measure the resistance between RCM C2041b-27, circuit 1261 (WH/LG), harness side and first row driver side impact sensor C3209-2, circuit 1261 (WH/LG), harness side.
    • Is the resistance less than 0.5 ohm? 
    1. YES  : Go to  N9.
    2. NO  : REPAIR circuit 1261 (WH/LG). Go to  N54 .
  9. N9 CHECK CIRCUIT 1262 (BN/LG) FOR AN OPEN BETWEEN THE RCM AND THE FIRST ROW DRIVER SIDE IMPACT SENSOR 
      Fig 4: Checking Circuit For Open
      GF0023963Courtesy of FORD MOTOR CO.
    • Measure the resistance between RCM C2041b-28, circuit 1262 (BN/LG), harness side and first row driver side impact sensor C3209-1, circuit 1262 (BN/LG), harness side.
    • Is the resistance less than 0.5 ohm? 
    1. YES  : Go to  N10.
    2. NO  : REPAIR circuit 1262 (BN/LG). Go to  N54 .
  10. N10 CHECK CIRCUIT 1261 (WH/LG) FOR A SHORT TO CIRCUIT 1262 (BN/LG) BETWEEN THE RCM AND THE FIRST ROW DRIVER SIDE IMPACT SENSOR 
    • Measure the resistance between first row driver side impact sensor C3209-2, circuit 1261 (WH/LG), harness side and C3209-1, circuit 1262 (BN/LG), harness side.
    • Is the resistance greater than 1,000,000 ohms? 
    1. YES  : Go to  N11.
    2. NO  : REPAIR circuit 1261 (WH/LG) and circuit 1262 (BN/LG). Go to  N54 .
  11. N11 CHECK THE FIRST ROW DRIVER SIDE IMPACT SENSOR 
    • Connect: RCM C2041a and C2041b
    • Install a known good first row driver side impact sensor.
    • Repower the system. Do not  prove out the system at this time. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Enter the following diagnostic mode on the diagnostic tool: On-Demand Self Test/Retrieve and Record Continuous Memory DTCs
    • Enter the following diagnostic mode on the diagnostic tool: View and Record DTC B2296 Fault PIDs
    • Were any on-demand fault PIDs against the first row driver side impact sensor? 
    1. YES  : Go to  N52.
    2. NO  : Fault corrected. Go to  N54 .
  12. N12 INSPECT THE FIRST ROW PASSENGER SIDE IMPACT SENSOR MOUNTING SURFACE 
    • Key in OFF position.
    • Depower the system. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Inspect the first row passenger side impact sensor mounting and make sure that the retaining bolt is fully seated and tightened correctly.
    • Remove the first row passenger side impact sensor.
    • Visually inspect the first row passenger side impact sensor and mounting surface for damage, corrosion or dirt.
    • Was a significant amount of corrosion or dirt found, the first row passenger side impact sensor attached to the mounting surface incorrectly or was the impact sensor bolt not fully seated and tightened correctly? 
    1. YES  : CLEAN and TIGHTEN the bolt or REPAIR the mounting surface as necessary. REINSTALL the first row passenger side impact sensor. Go to  N54 .
    2. NO  : Go to  N13.
  13. N13 INSTALL THE FIRST ROW PASSENGER SIDE IMPACT SENSOR AND CARRY OUT THE ON-DEMAND SELF TEST 
    • Clean and repair the mounting surface as necessary.
    • Clean the first row passenger side impact sensor mounting bolt.
    • Install the first row passenger side impact sensor.
    • Repower the system. Do not  prove out the system at this time. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Enter the following diagnostic mode on the diagnostic tool: On-Demand Self Test/Retrieve and Record Continuous Memory DTCs
    • Enter the following diagnostic mode on the diagnostic tool: View and Record DTC B2296 Fault PIDs
    • Was on-demand DTC B2296 retrieved? 
    1. YES  : Go to  N14.
    2. NO  : Fault corrected. Go to  N54 .
  14. N14 CHECK THE FIRST ROW PASSENGER SIDE IMPACT SENSOR GROUND CIRCUIT 1264 (BN) FOR HIGH RESISTANCE 
    • Key in OFF position.
    • Depower the system. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Disconnect: First Row Passenger Side Impact Sensor C3211
    • Measure the resistance between the first row passenger side impact sensor C3211-1, circuit 1264 (BN), harness side and the first row passenger side impact sensor case ground.
    • Is the resistance less than 10 ohms? 
    1. YES  : Go to  N16.
    2. NO  : Go to  N15.
  15. N15 CLEAN THE FIRST ROW PASSENGER SIDE IMPACT SENSOR MOUNTING SURFACE AND CARRY OUT THE ON-DEMAND SELF TEST 
    • Remove the first row passenger side impact sensor.
    • Clean and repair the mounting surface as necessary.
    • Clean the first row passenger side impact sensor mounting bolt.
    • Install the first row passenger side impact sensor.
    • Repower the system. Do not  prove out the system at this time. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Enter the following diagnostic mode on the diagnostic tool: On-Demand Self Test/Retrieve and Record Continuous Memory DTCs
    • Enter the following diagnostic mode on the diagnostic tool: View and Record DTC B2296 Fault PIDs
    • Was on-demand DTC B2296 retrieved? 
    1. YES  : Go to  N16.
    2. NO  : Fault corrected. Go to  N54 .
  16. N16 CHECK CIRCUIT 1263 (WH) AND CIRCUIT 1264 (BN) FOR A SHORT TO BATTERY BETWEEN THE FIRST ROW PASSENGER SIDE IMPACT SENSOR AND THE RCM 
    • Key in OFF position.
    • Depower the system. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Disconnect: RCM C2041a and C2041b
    • Disconnect: First Row Passenger Side Impact Sensor C3211
    • Repower the system. Do not  prove out the system at this time. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Key in ON position.
      • Fig 5: Checking Circuits For Voltage
      G03903723Courtesy of FORD MOTOR CO.
    • Measure the voltage between first row passenger side impact sensor C3211-2, circuit 1263 (WH), harness side and ground; and between C3211-1, circuit 1264 (BN), harness side and ground.
    • Are the voltages less than 0.2 volt? 
    1. YES  : Go to  N17.
    2. NO  : REPAIR circuit 1263 (WH) or circuit 1264 (BN). Go to  N54 .
  17. N17 CHECK CIRCUIT 1263 (WH) AND CIRCUIT 1264 (BN) FOR A SHORT TO GROUND BETWEEN THE FIRST ROW PASSENGER SIDE IMPACT SENSOR AND THE RCM 
    • Key in OFF position.
    • Depower the system. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
      • Fig 6: Checking Circuits For Short To Ground
      G03903724Courtesy of FORD MOTOR CO.
    • Measure the resistance between first row passenger side impact sensor C3211-2, circuit 1263 (WH), harness side and ground; and between C3211-1, circuit 1264 (BN), harness side and ground.
    • Are the resistances greater than 1,000,000 ohms? 
    1. YES  : Go to  N18.
    2. NO  : REPAIR circuit 1263 (WH) or circuit 1264 (BN). Go to  N54 .
  18. N18 CHECK CIRCUIT 1263 (WH) FOR AN OPEN BETWEEN THE RCM AND THE FIRST ROW PASSENGER SIDE IMPACT SENSOR 
      Fig 7: Checking Circuit For Open
      GF0023964Courtesy of FORD MOTOR CO.
    • Measure the resistance between RCM C2041b-29, circuit 1263 (WH), harness side and first row passenger side impact sensor C3211-2, circuit 1263 (WH), harness side.
    • Is the resistance less than 0.5 ohm? 
    1. YES  : Go to  N19.
    2. NO  : REPAIR circuit 1263 (WH). Go to  N54 .
  19. N19 CHECK CIRCUIT 1264 (BN) FOR AN OPEN BETWEEN THE RCM AND THE FIRST ROW PASSENGER SIDE IMPACT SENSOR 
      Fig 8: Checking Circuit For Open
      GF0023965Courtesy of FORD MOTOR CO.
    • Measure the resistance between RCM C2041b-30, circuit 1264 (BN), harness side and first row passenger side impact sensor C3211-1, circuit 1264 (BN), harness side.
    • Is the resistance less than 0.5 ohm? 
    1. YES  : Go to  N20.
    2. NO  : REPAIR circuit 1264 (BN). Go to  N54 .
  20. N20 CHECK CIRCUIT 1263 (WH) FOR A SHORT TO CIRCUIT 1264 (BN) BETWEEN THE RCM AND THE FIRST ROW PASSENGER SIDE IMPACT SENSOR 
    • Measure the resistance between first row passenger side impact sensor C3211-2, circuit 1263 (WH), harness side and C3211-1, circuit 1264 (BN), harness side.
    • Is the resistance greater than 1,000,000 ohms? 
    1. YES  : Go to  N21.
    2. NO  : REPAIR short between circuit 1263 (WH) and circuit 1264 (BN). Go to  N54 .
  21. N21 CHECK THE FIRST ROW PASSENGER SIDE IMPACT SENSOR 
    • Connect: RCM C2041a and C2041b
    • Install a known good first row passenger side impact sensor.
    • Repower the system. Do not  prove out the system at this time. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Enter the following diagnostic mode on the diagnostic tool: On-Demand Self Test/Retrieve and Record Continuous Memory DTCs
    • Enter the following diagnostic mode on the diagnostic tool: View and Record DTC B2296 Fault PIDs
    • Were any on-demand fault PIDs against the first row passenger side impact sensor? 
    1. YES  : Go to  N52.
    2. NO  : Fault corrected. Go to  N54 .
  22. N22 INSPECT THE SECOND ROW DRIVER SIDE IMPACT SENSOR MOUNTING SURFACE 
    • Key in OFF position.
    • Depower the system. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Inspect the second row driver side impact sensor mounting and make sure that the retaining bolt is fully seated and tightened correctly.
    • Remove the second row driver side impact sensor.
    • Visually inspect the second row driver side impact sensor mounting surface for damage, corrosion or dirt.
    • Was a significant amount of corrosion or dirt found, the second row driver side impact sensor attached to the mounting surface incorrectly or was the impact sensor bolt not fully seated and tightened correctly? 
    1. YES  : CLEAN and TIGHTEN the bolt or REPAIR the mounting surface as necessary. REINSTALL the second row driver side impact sensor. Go to  N54 .
    2. NO  : Go to  N23.
  23. N23 INSTALL THE SECOND ROW DRIVER SIDE IMPACT SENSOR AND CARRY OUT THE ON-DEMAND SELF TEST 
    • Clean and repair the mounting surface as necessary.
    • Clean the second row driver side impact sensor mounting bolt.
    • Install the second row driver side impact sensor.
    • Repower the system. Do not  prove out the system at this time. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Enter the following diagnostic mode on the diagnostic tool: On-Demand Self Test/Retrieve and Record Continuous Memory DTCs
    • Enter the following diagnostic mode on the diagnostic tool: View and Record DTC B2296 Fault PIDs
    • Was on-demand DTC B2296 retrieved? 
    1. YES  : Go to  N24.
    2. NO  : Fault corrected. Go to  N54 .
  24. N24 CHECK THE SECOND ROW DRIVER SIDE IMPACT SENSOR GROUND CIRCUIT 1642 (DG/WH) FOR HIGH RESISTANCE 
    • Key in OFF position.
    • Depower the system. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Disconnect: Second Row Driver Side Impact Sensor C3210
    • Measure the resistance between second row driver side impact sensor C3210-1, circuit 1642 (DG/WH), harness side and the second row driver side impact sensor case ground.
    • Is the resistance less than 10 ohms? 
    1. YES  : Go to  N26.
    2. NO  : Go to  N25.
  25. N25 CLEAN THE SECOND ROW DRIVER SIDE IMPACT SENSOR MOUNTING SURFACE AND CARRY OUT THE ON-DEMAND SELF TEST 
    • Remove the second row driver side impact sensor.
    • Clean and repair the mounting surface as necessary.
    • Clean the second row driver side impact sensor mounting bolt.
    • Install the second row driver side impact sensor.
    • Repower the system. Do not  prove out the system at this time. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Enter the following diagnostic mode on the diagnostic tool: On-Demand Self Test/Retrieve and Record Continuous Memory DTCs
    • Enter the following diagnostic mode on the diagnostic tool: View and Record DTC B2296 Fault PIDs
    • Was on-demand DTC B2296 retrieved? 
    1. YES  : Go to  N26.
    2. NO  : Fault corrected. Go to  N54 .
  26. N26 CHECK CIRCUIT 1641 (VT) AND CIRCUIT 1642 (DG/WH) FOR A SHORT TO BATTERY BETWEEN THE SECOND ROW DRIVER SIDE IMPACT SENSOR AND THE RCM 
    • Key in OFF position.
    • Depower the system. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Disconnect: RCM C2041a and C2041b
    • Disconnect: Second Row Driver Side Impact Sensor C3210
    • Repower the system. Do not  prove out the system at this time. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Key in ON position.
      • Fig 9: Checking Circuits For Voltage
      G03903723Courtesy of FORD MOTOR CO.
    • Measure the voltage between second row driver side impact sensor C3210-2, circuit 1641 (VT), harness side and ground; and between pin 1, circuit 1642 (DG/WH), harness side and ground.
    • Are the voltages less than 0.2 volt? 
    1. YES  : Go to  N27.
    2. NO  : REPAIR circuit 1641 (VT) or circuit 1642 (DG/WH). Go to  N54 .
  27. N27 CHECK CIRCUIT 1641 (VT) AND CIRCUIT 1642 (DG/WH) FOR A SHORT TO GROUND BETWEEN THE SECOND ROW DRIVER SIDE IMPACT SENSOR AND THE RCM 
    • Key in OFF position.
    • Depower the system. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
      • Fig 10: Checking Circuits For Short To Ground
      G03903724Courtesy of FORD MOTOR CO.
    • Measure the resistance between second row driver side impact sensor C3210-1, circuit 1641 (VT), harness side and ground; and between C3210-2, circuit 1642 (DG/WH), harness side and ground.
    • Are the resistances greater than 1,000,000 ohms? 
    1. YES  : Go to  N28.
    2. NO  : REPAIR circuit 1641 (VT) or circuit 1642 (DG/WH). Go to  N54 .
  28. N28 CHECK CIRCUIT 1641 (VT) FOR AN OPEN BETWEEN THE RCM AND THE SECOND ROW DRIVER SIDE IMPACT SENSOR 
      Fig 11: Checking Circuit For Open
      GF0023966Courtesy of FORD MOTOR CO.
    • Measure the resistance between RCM C2041b-13, circuit 1641 (VT), harness side and second row driver side impact sensor C3210-2, circuit 1641 (VT), harness side.
    • Is the resistance less than 0.5 ohm? 
    1. YES  : Go to  N29.
    2. NO  : REPAIR circuit 1641 (VT). Go to  N54 .
  29. N29 CHECK CIRCUIT 1642 (DG/WH) FOR AN OPEN BETWEEN THE RCM AND THE SECOND ROW DRIVER SIDE IMPACT SENSOR 
      Fig 12: Checking Circuit For Open
      GF0023967Courtesy of FORD MOTOR CO.
    • Measure the resistance between RCM C2041b-14, circuit 1642 (DG/WH), harness side and second row driver side impact sensor C3210-1, circuit 1642 (DG/WH), harness side.
    • Is the resistance less than 0.5 ohm? 
    1. YES  : Go to  N30.
    2. NO  : REPAIR circuit 1642 (DG/WH). Go to  N54 .
  30. N30 CHECK CIRCUIT 1641 (VT) FOR A SHORT TO CIRCUIT 1642 (DG/WH) BETWEEN THE RCM AND THE SECOND ROW DRIVER SIDE IMPACT SENSOR 
    • Measure the resistance between second row driver side impact sensor C3210-2, circuit 1641 (VT), harness side and C3210-1, circuit 1642 (DG/WH), harness side.
    • Is the resistance greater than 1,000,000 ohms? 
    1. YES  : Go to  N31.

    2. NO  : REPAIR circuit 1641 (VT) or circuit 1642 (DG/WH). Go to  N54 .
  31. N31 CHECK THE SECOND ROW DRIVER SIDE IMPACT SENSOR 
    • Connect: RCM C2041a and C2041b
    • Install a known good second row driver side impact sensor.
    • Repower the system. Do not  prove out the system at this time. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Enter the following diagnostic mode on the diagnostic tool: On-Demand Self Test/Retrieve and Record Continuous Memory DTCs
    • Enter the following diagnostic mode on the diagnostic tool: View and Record DTC B2296 Fault PIDs
    • Were any on-demand fault PIDs against the second row driver side impact sensor? 
    1. YES  : Go to  N52.
    2. NO  : Fault corrected. Go to  N54 .
  32. N32 INSPECT THE SECOND ROW PASSENGER SIDE IMPACT SENSOR MOUNTING SURFACE 
    • Key in OFF position.
    • Depower the system. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Inspect the second row passenger side impact sensor mounting and make sure that the retaining bolt is fully seated and tightened correctly.
    • Remove the second row passenger side impact sensor.
    • Visually inspect the second row passenger side impact sensor and mounting surface for damage, corrosion or dirt.
    • Was a significant amount of corrosion or dirt found, the second row passenger side impact sensor attached to the mounting surface incorrectly or was the impact sensor bolt not fully seated and tightened correctly? 
    1. YES  : CLEAN and TIGHTEN the bolts or REPAIR the mounting surface as necessary. REINSTALL the second row passenger side impact sensor. Go to  N54 .
    2. NO  : Go to  N33.
  33. N33 INSTALL THE SECOND ROW PASSENGER SIDE IMPACT SENSOR AND CARRY OUT THE ON-DEMAND SELF TEST 
    • Clean and repair the mounting surface as necessary.
    • Clean the second row passenger side impact sensor mounting bolt.
    • Install the second row passenger side impact sensor.
    • Repower the system. Do not  prove out the system at this time. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Enter the following diagnostic mode on the diagnostic tool: On-Demand Self Test/Retrieve and Record Continuous Memory DTCs
    • Enter the following diagnostic mode on the diagnostic tool: View and Record DTC B2296 Fault PIDs
    • Was on-demand DTC B2296 retrieved? 
    1. YES  : Go to  N34.
    2. NO  : Fault corrected. Go to  N54 .
  34. N34 CHECK THE SECOND ROW PASSENGER SIDE IMPACT SENSOR GROUND CIRCUIT 1644 (LB/WH) FOR HIGH RESISTANCE 
    • Key in OFF position.
    • Depower the system. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Disconnect: Second Row Passenger Side Impact Sensor C3212
    • Measure the resistance between second row passenger side impact sensor C3212-1, circuit 1644 (LB/WH), harness side and the second row passenger side impact sensor case ground.
    • Is the resistance less than 10 ohms? 
    1. YES  : Go to  N36.
    2. NO  : Go to  N35.
  35. N35 CLEAN THE SECOND ROW PASSENGER SIDE IMPACT SENSOR MOUNTING SURFACE AND CARRY OUT THE ON-DEMAND SELF TEST 
    • Remove the second row passenger side impact sensor.
    • Clean and repair the mounting surface as necessary.
    • Clean the second row passenger side impact sensor mounting bolt.
    • Install the second row passenger side impact sensor.
    • Repower the system. Do not  prove out the system at this time. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Enter the following diagnostic mode on the diagnostic tool: On-Demand Self Test/Retrieve and Record Continuous Memory DTCs
    • Enter the following diagnostic mode on the diagnostic tool: View and Record DTC B2296 Fault PIDs
    • Was on-demand DTC B2296 retrieved? 
    1. YES  : Go to  N36.
    2. NO  : Fault corrected. Go to  N54 .
  36. N36 CHECK CIRCUIT 1643 (WH/RD) AND CIRCUIT 1644 (LB/WH) FOR A SHORT TO VOLTAGE BETWEEN THE SECOND ROW PASSENGER SIDE IMPACT SENSOR AND THE RCM 
    • Key in OFF position.
    • Depower the system. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Disconnect: RCM C2041a and C2041b
    • Disconnect: Second Row Passenger Side Impact Sensor C3212
    • Repower the system. Do not  prove out the system at this time. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Key in ON position.
      • Fig 13: Checking Circuit For Voltage
      G03903723Courtesy of FORD MOTOR CO.
    • Measure the voltage between second row passenger side impact sensor C3212-2, circuit 1643 (WH/RD), harness side and ground; and between C3212-1, circuit 1644 (LB/WH), harness side and ground.
    • Are the voltages less than 0.2 volt? 
    1. YES  : Go to  N37.
    2. NO  : REPAIR circuit 1643 (WH/RD) or circuit 1644 (LB/WH). Go to  N54 .
  37. N37 CHECK CIRCUIT 1643 (WH/RD) AND CIRCUIT 1644 (LB/WH) FOR A SHORT TO GROUND BETWEEN THE SECOND ROW PASSENGER SIDE IMPACT SENSOR AND THE RCM 
    • Key in OFF position.
    • Depower the system. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
      • Fig 14: Checking Circuits For Short To Ground
      G03903724Courtesy of FORD MOTOR CO.
    • Measure the resistance between second row passenger side impact sensor C3212-2, circuit 1643 (WH/RD), harness side and ground; and between C3212-1, circuit 1644 (LB/WH), harness side and ground.
    • Are the resistances greater than 1,000,000 ohms? 
    1. YES  : Go to  N38.
    2. NO  : REPAIR circuit 1643 (WH/RD) or 1644 (LB/WH). Go to  N54 .
  38. N38 CHECK CIRCUIT 1643 (WH/RD) FOR AN OPEN BETWEEN THE RCM AND THE SECOND ROW PASSENGER SIDE IMPACT SENSOR 
      Fig 15: Checking Circuit For Open
      GF0023968Courtesy of FORD MOTOR CO.
    • Measure the resistance between RCM C2041b-15, circuit 1643 (WH/RD), harness side and second row passenger side impact sensor C3212-2, circuit 1643 (WH/RD), harness side.
    • Is the resistance less than 0.5 ohm? 
    1. YES  : Go to  N39.
    2. NO  : REPAIR circuit 1643 (WH/RD). Go to  N54 .
  39. N39 CHECK CIRCUIT 1644 (LB/WH) FOR AN OPEN BETWEEN THE RCM AND THE SECOND ROW PASSENGER SIDE IMPACT SENSOR 
      Fig 16: Checking Circuit For Open
      GF0023969Courtesy of FORD MOTOR CO.
    • Measure the resistance between RCM C2041b-16, circuit 1644 (LB/WH), harness side and second row passenger side impact sensor C3212-1, circuit 1644 (LB/WH), harness side.
    • Is the resistance less than 0.5 ohm? 
    1. YES  : Go to  N40.
    2. NO  : REPAIR circuit 1644 (LB/WH). Go to  N54 .
  40. N40 CHECK CIRCUIT 1643 (WH/RD) FOR A SHORT TO CIRCUIT 1644 (LB/WH) BETWEEN THE RCM AND THE SECOND ROW PASSENGER SIDE IMPACT SENSOR 
    • Measure the resistance between second row passenger side impact sensor C3212-2, circuit 1643 (WH/RD), harness side and C3212-1, circuit 1644 (LB/WH), harness side.
    • Is the resistance greater than 1,000,000 ohms? 
    1. YES  : Go to  N41.
    2. NO  : REPAIR circuit 1643 (WH/RD) and circuit 1644 (LB/WH). Go to  N54 .
  41. N41 CHECK THE SECOND ROW PASSENGER SIDE IMPACT SENSOR 
    • Connect: RCM C2041a and C2041b
    • Install a known good second row passenger side impact sensor.
    • Repower the system. Do not  prove out the system at this time. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Enter the following diagnostic mode on the diagnostic tool: On-Demand Self Test/Retrieve and Record Continuous Memory DTCs
    • Enter the following diagnostic mode on the diagnostic tool: View and Record DTC B2296 Fault PIDs
    • Were any on-demand fault PIDs against the second row passenger side impact sensor? 
    1. YES  : Go to  N52.
    2. NO  : Fault corrected. Go to  N54 .
  42. N42 INSPECT THE FRONT IMPACT SEVERITY SENSOR MOUNTING SURFACE 
    • Key in OFF position.
    • Depower the system. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Inspect the front impact severity sensor mounting and make sure that the retaining bolt is fully seated and tightened correctly.
    • Remove the front impact severity sensor. Refer to Front Impact Severity Sensor .
    • Visually inspect the front impact severity sensor and mounting surface for damage, corrosion or dirt.
    • Was a significant amount of corrosion or dirt found, the front impact severity sensor attached to the mounting surface incorrectly or was the front impact severity sensor bolt not fully seated and tightened correctly? 
    1. YES  : CLEAN and TIGHTEN bolt or REPAIR the mounting surface as necessary. REINSTALL the front impact severity sensor. Go to  N54 .
    2. NO  : Go to  N43.
  43. N43 INSTALL THE FRONT IMPACT SEVERITY SENSOR AND CARRY OUT THE ON-DEMAND SELF TEST 
    • Clean and repair the mounting surface as necessary.
    • Clean the front impact severity sensor mounting bolt.
    • Install the front impact severity sensor. Refer to Front Impact Severity Sensor .
    • Repower the system. Do not  prove out the system at this time. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Enter the following diagnostic mode on the diagnostic tool: On-Demand Self Test/Retrieve and Record Continuous Memory DTCs
    • Enter the following diagnostic mode on the diagnostic tool: View and Record DTC B2296 Fault PIDs
    • Was on-demand DTC B2296 retrieved? 
    1. YES  : Go to  N44.
    2. NO  : Fault corrected. Go to  N54 .
  44. N44 CHECK THE FRONT IMPACT SEVERITY SENSOR GROUND CIRCUIT 618 (VT/LG) FOR HIGH RESISTANCE 
    • Key in OFF position.
    • Depower the system. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Disconnect: Front Impact Severity Sensor C177
    • Measure the resistance between front impact severity sensor C177-1, circuit 618 (VT/LG), harness side and the front impact severity sensor case ground.
    • Is the resistance less than 10 ohms? 
    1. YES  : Go to  N46.
    2. NO  : Go to  N45.
  45. N45 CLEAN THE FRONT IMPACT SEVERITY SENSOR MOUNTING SURFACE AND CARRY OUT THE ON-DEMAND SELF-TEST 
    • Remove the front impact severity sensor. Refer to Front Impact Severity Sensor .
    • Clean and repair the mounting surface as necessary.
    • Clean the front impact severity sensor mounting bolt.
    • Install the front impact severity sensor. Refer to Front Impact Severity Sensor .
    • Repower the system. Do not  prove out the system at this time. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Enter the following diagnostic mode on the diagnostic tool: On-Demand Self Test/Retrieve and Record Continuous Memory DTCs
    • Enter the following diagnostic mode on the diagnostic tool: View and Record DTC B2296 Fault PIDs
    • Was on-demand DTC B2296 retrieved? 
    1. YES  : Go to  N46.
    2. NO  : Fault corrected. Go to  N54 .
  46. N46 CHECK CIRCUIT 617 (PK/OG) AND CIRCUIT 618 (VT/LG) FOR A SHORT TO VOLTAGE BETWEEN THE RCM AND THE FRONT IMPACT SEVERITY SENSOR 
    • Key in OFF position.
    • Depower the system. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Disconnect: RCM C2041a and C2041b
    • Disconnect: Front Impact Severity Sensor C177
    • Repower the system. Do not  prove out the system at this time. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Key in ON position.
      • Fig 17: Checking Circuit For Voltage
      GF0013421Courtesy of FORD MOTOR CO.
    • Measure the voltage between front impact severity sensor C177-2, circuit 617 (PK/OG), harness side and ground; and between front impact severity sensor C177-1, circuit 618 (VT/LG), harness side and ground.
    • Are the voltages less than 0.2 volt? 
    1. YES  : Go to  N47.
    2. NO  : REPAIR circuit 617 (PK/OG) or circuit 618 (VT/LG). Go to  N54 .
  47. N47 CHECK CIRCUIT 617 (PK/OG) AND CIRCUIT 618 (VT/LG) FOR A SHORT TO GROUND BETWEEN THE RCM AND THE FRONT IMPACT SEVERITY SENSOR 
    • Key in OFF position.
    • Depower the system. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
      • Fig 18: Checking Circuits For Short To Ground
      GF0016850Courtesy of FORD MOTOR CO.
    • Measure the resistance between front impact severity sensor C177-2, circuit 617 (PK/OG), harness side and ground; and between front impact severity sensor C177-1, circuit 618 (VT/LG), harness side and ground.
    • Are the resistances greater than 1,000,000 ohms? 
    1. YES  : Go to  N48.
    2. NO  : REPAIR circuit 617 (PK/OG) or circuit 618 (VT/LG). Go to  N54 .
  48. N48 CHECK CIRCUIT 617 (PK/OG) FOR AN OPEN BETWEEN THE RCM AND THE FRONT IMPACT SEVERITY SENSOR 
      Fig 19: Checking Circuit For Open
      GF0023970Courtesy of FORD MOTOR CO.
    • Measure the resistance between RCM C2041b-19, circuit 617 (PK/OG), harness side and front impact severity sensor C177-2, circuit 617 (PK/OG), harness side.
    • Is the resistance less than 0.5 ohm? 
    1. YES  : Go to  N49.
    2. NO  : REPAIR circuit 617 (PK/OG). Go to  N54 .
  49. N49 CHECK CIRCUIT 618 (VT/LG) FOR AN OPEN BETWEEN THE RCM AND THE FRONT IMPACT SEVERITY SENSOR 
      Fig 20: Checking Circuit For Open
      GF0023971Courtesy of FORD MOTOR CO.
    • Measure the resistance between RCM C2041b-20, circuit 618 (VT/LG), harness side and front impact severity sensor C177-1, circuit 618 (VT/LG), harness side.
    • Is the resistance less than 0.5 ohm? 
    1. YES  : Go to  N50.
    2. NO  : REPAIR circuit 618 (VT/LG). Go to  N54 .
  50. N50 CHECK CIRCUIT 617 (PK/OG) FOR A SHORT TO CIRCUIT 618 (VT/LG) BETWEEN THE RCM AND THE FRONT IMPACT SEVERITY SENSOR 
      Fig 21: Checking Circuits For Short Together
      GF0023972Courtesy of FORD MOTOR CO.
    • Measure the resistance between front impact severity sensor C177-2, circuit 617 (PK/OG), harness side and C177-1, circuit 618 (VT/LG), harness side.
    • Is the resistance greater than 1,000,000 ohms? 
    1. YES  : Go to  N51.
    2. NO  : REPAIR circuit 617 (PK/OG) and circuit 618 (VT/LG). Go to  N54 .
  51. N51 CHECK THE FRONT IMPACT SEVERITY SENSOR 
    • Connect: RCM C2041a and C2041b
    • Install a known good front impact severity sensor.
    • Repower the system. Do not  prove out the system at this time. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Enter the following diagnostic mode on the diagnostic tool: On-Demand Self Test/Retrieve and Record Continuous Memory DTCs
    • Enter the following diagnostic mode on the diagnostic tool: View and Record DTC B2296 Fault PIDs
    • Were any on-demand fault PIDs against the front impact severity sensor? 
    1. YES  : Go to  N52.
    2. NO  : Fault corrected. Go to  N54 .
  52. N52 CONFIRM THE RCM FAULT 
    NOTE: Make sure all restraint system diagnostic tools, sensor electrical connectors and the RCM electrical connector are connected before carrying out the on-demand self test. If not, erroneous DTCs will be recorded.
    1. YES  : INSTALL a new RCM. REFER to Restraints Control Module (RCM) . Go to  N54 .
    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. REPAIR any intermittent concerns found. Go to  N54 .
  53. N53 CHECK FOR AN INTERMITTENT FAULT 
    • Key in OFF position.
    • Enter the following diagnostic mode on the diagnostic tool: On-Demand Self Test/Retrieve and Record Continuous Memory DTCs
    • Enter the following diagnostic mode on the diagnostic tool: View and Record DTC B2296 Fault PIDs
    • Was on-demand DTC B2296 retrieved? 
    1. YES  : This is a hard fault. The fault condition is now present. The fault cannot be cleared until it is corrected and the DTC is no longer retrieved during the on-demand self test.

      CHECK for causes of the intermittent fault at or near the affected impact sensor connector. REPAIR any intermittent concerns found.

      If an intermittent concern was  found and repaired, go to  N54 .

      If an intermittent concern was not  found and repaired, USE the fault PIDs recorded and Go to the appropriate pinpoint test step.

      For first row driver side impact sensor with a mounting/communications fault, go to  N2 .

      For first row driver side impact sensor with an internal fault, INSTALL a new first row driver side impact sensor. REFER to Side Impact Sensor - First Row, B-Pillar . Go to  N54 .

    2. For first row passenger side impact sensor with a mounting/communications fault, go to  N12 .

      For first row passenger side impact sensor with an internal fault, INSTALL a new first row passenger side impact sensor. REFER to Side Impact Sensor - First Row, B-Pillar . Go to  N54 .

      For second row driver side impact sensor with a mounting/communication fault, go to  N22 .

      For second row driver side impact sensor with an internal fault, INSTALL a new second row driver side impact sensor. REFER to Side Impact Sensor - Second Row, C-Pillar . Go to  N54 .

      For second row passenger side impact sensor with a mounting/communications fault, go to  N32 .

      For second row passenger side impact sensor with an internal fault, INSTALL a new second row passenger side impact sensor. REFER to Side Impact Sensor - Second Row, C-Pillar . Go to  N54 .

      For front impact severity sensor with a mounting/communications fault, go to  N42 .

      For front impact severity sensor with an internal fault, INSTALL a new front impact severity sensor. REFER to Front Impact Severity Sensor . Go to  N54 .

    3. 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. REPAIR any intermittent concerns found. Go to  N54 .
  54. N54 CHECK FOR ADDITIONAL DTCs 
    • Refer to the continuous memory DTCs recorded during Step N1.
    • Were any continuous memory DTCs retrieved during Step N1? 
    1. YES  : Do not clear any DTCs until all DTCs have been resolved. Go to the Restraints Control Module (RCM) Diagnostic Trouble Code (DTC) Table for pinpoint test direction.
    2. NO  : RECONNECT the system. If previously directed to deactivate the system, REACTIVATE the system. REFER to Supplemental Restraint System (SRS) Deactivation and Reactivation . REPOWER the system. REFER to Supplemental Restraint System (SRS) Depowering and Repowering . PROVE OUT the system. CLEAR all DTCs.
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