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Home >> Ford >> 2009 >> Flex Limited, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 913 (Supplemental Inflatable Restraint System) >> Diagnostic Tests >> Pinpoint Tests - Air Bag and Safety Belt Pretensioner Supplemental Restraint System (SRS) >> Pinpoint Tests >> Pinpoint Test E: DTC B2290 - Occupant Classification System (OCS) Fault >> Pinpoint Test E: DTC B2290 - Occupant Classification System (OCS) Fault

Pinpoint Test E: DTC B2290 - Occupant Classification System (OCS) Fault

WARNING: This page is about a different car, the 2007 Ford Ranger. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: To identify between a production OCS system and an OCS system service kit (OCS service kit), inspect the OCS module electrical connector.  

A production OCS system allows the disconnect of the electrical connector from the OCS module.

An OCS system service kit has the OCS module electrical connector glued to the module. It cannot and should not be disconnected or altered.

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. E1 CHECK FOR A HARD OR INTERMITTENT DTC 
    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: 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.
    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: OCS On-Demand Self Test/Retrieve and Record Continuous Memory DTCs
    • Enter the following diagnostic mode on the diagnostic tool: View and Record OCS DTC B2290 Fault PIDs
    • Was on-demand DTC B2290 retrieved from the OCS module? 
    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.

      Vehicles with a production OCS system  Go to  E2 .

      Vehicles with a service OCS system 

      For OCS system with a pressure sensor fault or a pressure sensor internal fault, INSPECT the seat wiring harness for damage and REPAIR as needed. If OK, INSTALL a new OCS system service kit. Refer to Occupant Classification Sensor  in this article. Go to  E11 .

    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  E13 .
  2. E2 CHECK THE SEAT WIRING AND CONNECTORS 
    • Key in OFF position.
    • Depower the system. Refer to Supplemental Restraint System (SRS) Depowering and Repowering  in this article.
    • Carry out a thorough visual inspection of the OCS system wiring, terminals and connectors and the related seat wiring harness and body wiring harness terminals and connectors.
    • Were any problems noted? 
    1. YES  : REPAIR the seat connectors and wiring as needed. Go to  E14 .
    2. NO  : For OCS system with a pressure sensor internal fault, go to  E3 .

      For OCS system with a pressure sensor short to ground fault, go to  E10 .

      For OCS system with a pressure sensor short to battery fault, go to  E11 .

  3. E3 CHECK CIRCUITS CR152 (GY/YE), RR152 (YE/VT) AND VR223 (BU/WH) FOR A SHORT TO VOLTAGE 
    • Disconnect: OCS Pressure Sensor C3042
    • Disconnect: OCS Module C3159
    • Repower the system. Do not  prove out the system at this time. Refer to Supplemental Restraint System (SRS) Depowering and Repowering  in this article.
    • Key in ON position.
    • Measure the voltage between OCS pressure sensor C3042-1, circuit CR152 (GY/YE), harness side and ground; between OCS pressure sensor C3042-2, circuit VR223 (BU/WH), harness side and ground; and between OCS pressure sensor C3042-3, circuit RR152 (YE/VT), harness side and ground.
    • Are the voltages less than 0.2 volt? 
    1. YES  : Go to  E4.
    2. NO  : REPAIR circuit CR152 (GY/YE), circuit RR152 (YE/VT) or circuit VR223 (BU/WH). Go to  E14 .
  4. E4 CHECK CIRCUITS CR152 (GY/YE), RR152 (YE/VT) AND VR223 (BU/WH) FOR A SHORT TO GROUND 
    • Key in OFF position.
    • Depower the system. Refer to Supplemental Restraint System (SRS) Depowering and Repowering  in this article.
    • Measure the resistance between OCS pressure sensor C3042-1, circuit CR152 (GY/YE), harness side and ground; between OCS pressure sensor C3042-2, circuit VR223 (BU/WH), harness side and ground; and between OCS pressure sensor C3042-3, circuit RR152 (YE/VT), harness side and ground.
    • Are the resistances greater than 1,000,000 ohms? 
    1. YES  : Go to  E5.
    2. NO  : REPAIR circuit CR152 (GY/YE), circuit RR152 (YE/VT) or circuit VR223 (BU/WH). Go to  E14 .
  5. E5 CHECK CIRCUIT CR152 (GY/YE) FOR AN OPEN BETWEEN THE OCS MODULE AND PRESSURE SENSOR 
    • Measure the resistance between OCS module C3159-3, circuit CR152 (GY/YE), harness side and OCS pressure sensor C3042-1, circuit CR152 (GY/YE), harness side.
      Fig 1: Measuring Resistance Between OCS Module C3159-3, CR152 (GY/YE), C3042-1, CR152 (GY/YE)
      GF0002154Courtesy of FORD MOTOR CO.
    • Is the resistance less than 0.5 ohm? 
    1. YES  : Go to  E6.
    2. NO  : REPAIR circuit CR152 (GY/YE). Go to  E14 .
  6. E6 CHECK CIRCUIT RR152 (YE/VT) FOR AN OPEN BETWEEN THE OCS MODULE AND PRESSURE SENSOR 
    • Measure the resistance between OCS module C3159-5, circuit RR152 (YE/VT), harness side and OCS pressure sensor C3042-3, circuit RR152 (YE/VT), harness side.
      Fig 2: Measuring Resistance Between OCS Module C3159-5, RR152 (YE/VT), C3042-3, RR152 (YE/VT)
      GF0002155Courtesy of FORD MOTOR CO.
    • Is the resistance less than 0.5 ohm? 
    1. YES  : Go to  E7.
    2. NO  : REPAIR circuit RR152 (YE/VT). Go to  E14 .
  7. E7 CHECK CIRCUIT VR223 (BU/WH) FOR AN OPEN BETWEEN THE OCS MODULE AND PRESSURE SENSOR 
    • Measure the resistance between OCS module C3159-4, circuit VR223 (BU/WH), harness side and OCS pressure sensor C3042-2, circuit VR223 (BU/WH), harness side.
      Fig 3: Measuring Resistance Between OCS Module C3159-4, VR223 (BU/WH), C3042-2, VR223 (BU/WH)
      GF0002156Courtesy of FORD MOTOR CO.
    • Is the resistance less than 0.5 ohm? 
    1. YES  : Go to  E8.
    2. NO  : REPAIR circuit VR223 (BU/WH). Go to  E14 .
  8. E8 CHECK CIRCUITS CR152 (GY/YE), RR152 (YE/VT) AND VR223 (BU/WH) FOR A SHORT 
    • Measure the resistance between the OCS pressure sensor:
      Fig 4: Measuring Resistance Between OCS Pressure Sensors
      GF0002157Courtesy of FORD MOTOR CO.
      • C3042-1, circuit CR152 (GY/YE), harness side and C3042-2, circuit VR223 (BU/WH), harness side.
      • C3042-1, circuit CR152 (GY/YE), harness side and C3042-3, circuit RR152 (YE/VT), harness side.
      • C3042-2, circuit VR223 (BU/WH), harness side and C3042-3, circuit RR152 (YE/VT), harness side.
    • Are the resistances greater than 1,000,000 ohms? 
    1. YES  : Go to  E9.
    2. NO  : REPAIR circuit CR152 (GY/YE), circuit RR152 (YE/VT) and/or circuit VR223 (BU/WH). Go to  E14 .
  9. E9 CHECK OCS SYSTEM 
    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.
    • Install a new OCS system service kit. Refer to Occupant Classification Sensor  in this article.
    • Repower the system. Do not  prove out the system at this time. Refer to Supplemental Restraint System (SRS) Depowering and Repowering  in this article.
    • Key in ON position.
    • Enter the following diagnostic mode on the diagnostic tool: OCS System Reset
      • WARNING: Make sure the front passenger seat repair is complete, the seat is completely assembled, all components (head restraint, seat side shield, etc.) are correctly installed and the front passenger seat is correctly installed to the vehicle before carrying out the OCS system reset. Failure to follow these instructions may increase the risk of personal injury or death in a crash.
      CAUTION: It is necessary to carry out the OCS system reset of the OCS system when a front passenger seat cushion is disassembled, a new trim cover installed or an OCS system service kit is installed. A scan tool is used to trigger the command to carry out the OCS system reset.
      CAUTION: Make sure the seat is completely assembled before carrying out the OCS system reset active command.
      CAUTION: The following precautions must be taken before carrying out the OCS system reset:
      • Make sure the OCS system components are connected and no faults are present.
      • Make sure the voltage to the OCS module is above 8.0 volts and less than 18.0 volts.
      • Make sure the OCS system is not at a temperature below 6°C (42°F) or above 36°C (97°F) when initiating the OCS system reset process. If the vehicle has been exposed to extreme cold or hot temperatures, the vehicle must be exposed and kept at a temperature within the limits, 6°C to 36°C (42°F to 97°F) for a minimum of 30 minutes.
      • Make sure nothing is present on the passenger seat before carrying out the OCS system reset and nothing is placed on the seat during the process.
      • Make sure a minimum 4-second time period has passed after cycling the ignition switch ON before the carrying out the OCS system reset process.
      NOTE: If the first attempt to carry out the OCS system reset is unsuccessful and DTC C1941 is reported, a second attempt must be made. If on the second attempt to carry out the OCS system reset is unsuccessful and DTC C1941 is reported a second time, a new OCS system service kit must be installed.
    • Carry out the OCS system reset active command using the scan tool.
    • Key in OFF position.
      NOTE: The ignition switch must be cycled after the OCS system reset.
    • Enter the following diagnostic mode on the diagnostic tool: OCS On-Demand Self Test/Retrieve and Record Continuous Memory DTCs
    • Enter the following diagnostic mode on the diagnostic tool: View and Record OCS DTC B2290 Fault PIDs
    • Was on-demand DTC B2290 or C1942 retrieved from the OCS module? 
    1. YES  : INSTALL a new OCS service kit. Refer to Occupant Classification Sensor  in this article. Go to  E14 .
    2. NO  : Fault corrected. Go to  E14 .
  10. E10 CHECK CIRCUITS CR152 (GY/YE), RR152 (YE/VT) AND VR223 (BU/WH) FOR A SHORT TO GROUND 
    • Key in OFF position.
    • Depower the system. Refer to Supplemental Restraint System (SRS) Depowering and Repowering  in this article.
    • Disconnect: OCS Pressure Sensor C3042
    • Disconnect: OCS Module C3159
    • Measure the resistance between OCS pressure sensor C3042-1, circuit CR152 (GY/YE), harness side and ground; between OCS pressure sensor C3042-2, circuit VR223 (BU/WH), harness side and ground; and between OCS pressure sensor C3042-3, circuit RR152 (YE/VT), harness side and ground.
    • Are the resistances greater than 1,000,000 ohms? 
    1. YES  : Go to  E12.
    2. NO  : REPAIR circuit CR152 (GY/YE), circuit RR152 (YE/VT) or circuit VR223 (BU/WH). Go to  E14 .
  11. E11 CHECK CIRCUITS CR152 (GY/YE), RR152 (YE/VT) AND VR223 (BU/WH) FOR A SHORT TO VOLTAGE 
    • Disconnect: OCS Pressure Sensor C3042
    • Disconnect: OCS Module C3159
    • Repower the system. Do not  prove out the system at this time. Refer to Supplemental Restraint System (SRS) Depowering and Repowering  in this article.
    • Key in ON position.
    • Measure the voltage between OCS pressure sensor C3042-1, circuit CR152 (GY/YE), harness side and ground; between OCS pressure sensor C3042-2, circuit VR223 (BU/WH), harness side and ground; and between OCS pressure sensor C3042-3, circuit RR152 (YE/VT), harness side and ground.
    • Are the voltages less than 0.2 volt? 
    1. YES  : Go to  E12.
    2. NO  : REPAIR circuit CR152 (GY/YE), circuit RR152 (YE/VT) or circuit VR223 (BU/WH). Go to  E14 .
  12. E12 CONFIRM THE OCS 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.
    • Key in OFF position.
    • Depower the system. Refer to Supplemental Restraint System (SRS) Depowering and Repowering  in this article.
    • Connect: OCS Module (if disconnected previously)
    • Connect: OCS Pressure Sensor C3042
    • Repower the system. Do not  prove out the system at this time. Refer to Supplemental Restraint System (SRS) Depowering and Repowering  in this article.
    • Enter the following diagnostic mode on the diagnostic tool: OCS On-Demand Self Test/Retrieve and Record Continuous Memory DTCs
    • Enter the following diagnostic mode on the diagnostic tool: View and Record OCS DTC B2290 Fault PIDs
    • Was on-demand DTC B2290 retrieved from the OCS module? 
    1. YES  : INSTALL a new OCS system service kit. REFER to Occupant Classification Sensor  in this article. Go to  E14 .
    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. REPAIR any intermittent concerns found. Go to  E14 .
  13. E13 CHECK FOR AN INTERMITTENT FAULT 
    • Enter the following diagnostic mode on the diagnostic tool: OCS On-Demand Self Test/Retrieve and Record Continuous Memory DTCs
    • Enter the following diagnostic mode on the diagnostic tool: View and Record OCS DTC B2290 Fault PIDs
    • Was on-demand DTC B2290 retrieved from the OCS module? 
    1. YES  : This is a hard fault. The fault condition is now present. This 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 SRS component connector. REPAIR any intermittent concerns found.

      If an intermittent concern was  found and repaired, go to  E14 .

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

      Vehicles with a production OCS system  Go to  E2 .

      Vehicles with a service OCS system 

      For OCS system with a pressure sensor fault or a pressure sensor internal fault, INSPECT the seat wiring harness for damage and REPAIR as needed. If OK, INSTALL a new OCS system service kit. Refer to Occupant Classification Sensor  in this article. Go to  E14 .

    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. REPAIR any intermittent concerns found. Go to  E14 .
  14. E14 CHECK FOR ADDITIONAL DTCs 
    • Refer to the continuous memory DTCs recorded during Step E1.
    • Were any continuous memory DTCs retrieved during Step E1? 
    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 in this article 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  in this article. REPOWER the system. REFER to Supplemental Restraint System (SRS) Depowering and Repowering  in this article. PROVE OUT the system. CLEAR all RCM and OCS module DTCs.
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