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Home >> Ford >> 2000 >> Contour SE, 2.0 3, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 2454 (Supplemental Restraint System) >> Diagnosis And Testing >> Air Bag and Safety Belt Pretensioner Supplemental Restraint System (SRS) >> Pinpoint Test - Occupant Classification System Module (OCSM) >> Pinpoint Test AC: DTCs B2290 and/or C1941 >> PINPOINT TEST AC: DTCs B2290 AND/OR C1941

PINPOINT TEST AC: DTCs B2290 AND/OR C1941

WARNING: This page is about a different car, the 2010 Mercury Mariner and 2010 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.
WARNING: Never probe the electrical connectors on air bag, Safety Canopy® or side air curtain modules. Failure to follow this instruction may result in the accidental deployment of these modules, which increases the risk of serious personal injury or death.
WARNING: Never disassemble or tamper with safety belt buckle/retractor pretensioners or adaptive load limiting retractors or probe the electrical connectors. Failure to follow this instruction may result in the accidental deployment of the safety belt pretensioners or adaptive load limiting retractors which increases the risk of serious personal injury or death.
NOTE: Use the correct probe adapter(s) from the Flex Probe Kit when taking measurements. Failure to use the correct probe adapter(s) may damage the connector.
Most faults are due to connector and/or wiring concerns. Carry out a thorough inspection and verification before proceeding with the pinpoint test.
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: A production OCS  system allows the disconnect of the electrical connector from the OCSM  .

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

  1. AC1 RETRIEVE OCSM DTCs 
    • Enter the following diagnostic mode on the scan tool: Self Test - OCSM  .
    • Enter the following diagnostic mode on the scan tool: DataLogger - OCSM  - View and Record All 2290 Fault PIDs.
      • Refer to PID list in Normal Operation to view 2290 fault PIDs.
    • Do any on-demand 2290 fault PIDs indicate a fault and/or was DTC C1941 retrieved during self-test? 
    • Yes:  This fault cannot be cleared until it is corrected and the DTC is no longer retrieved on-demand during self-test.

      GO to AC2  .

    • No:  This is an intermittent fault when present as a Continuous Memory Diagnostic Trouble Code (CMDTC) only. GO to  AC13.
  2. AC2 CHECK THE SEAT WIRING AND CONNECTORS 
    • Ignition OFF.
      • 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.
    • Carry out a thorough 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? 
    • Yes:  DEPOWER the SRS  and REPAIR the seat connectors and wiring as needed. GO to  AC14.

      If DTC C1941 was present, GO to  AC9.

      If DTC C1941 was NOT present, GO to  AC14.

    • No: Vehicles with a production OCS system: 

      For DTC C1941, GO to  AC9.

      For fault PID 2290_15_OD, GO to AC3  .

      For fault PID 2290_13_OD, GO to  AC10.

      For fault PID 2290_12_OD, GO to  AC11. Vehicles with a OCS system service kit  , INSTALL a new OCS  system service kit. REFER to OCCUPANT CLASSIFICATION SENSOR - SERVICE KIT . GO to  AC14.

  3. AC3 CHECK THE OCS PRESSURE SENSOR CIRCUITS FOR A SHORT TO VOLTAGE 
    • Depower the Supplemental Restraint System (SRS). Refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING .
    • Disconnect: Passenger Seat Side Air Bag Module C3255.
    • Disconnect: OCSM  C3285.
    • Ignition ON.
    • Measure the voltage between OCS  pressure sensor:
      • C3042-1, circuit CR152 (GY/YE), harness side and ground.
      • C3042-2, circuit VR223 (BU/WH), harness side and ground.
      • C3042-3, circuit RR152 (YE/VT), harness side and ground.
        Fig 1: Measuring Voltage Between C3042-1, Circuit CR152 (GY/YE), Harness Side And Ground
        G06100115Courtesy of FORD MOTOR CO.
    • Is voltage present on any circuit? 
    • Yes:  REPAIR circuit CR152 (GY/YE), RR152 (YE/VT) or VR223 (BU/WH). GO to  AC14.
    • No:  GO to AC4  .
  4. AC4 CHECK THE OCS PRESSURE SENSOR CIRCUITS FOR A SHORT TO GROUND 
    • Ignition OFF.
      • 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.
    • Measure the resistance between OCS  pressure sensor:
      • C3042-1, circuit CR152 (GY/YE), harness side and ground.
      • C3042-2, circuit VR223 (BU/WH), harness side and ground.
      • C3042-3, circuit RR152 (YE/VT), harness side and ground.
        Fig 2: Measuring Resistance Between OCS Pressure Sensor And C3042-1, Circuit CR152 (GY/YE), Harness Side And Ground
        G06100116Courtesy of FORD MOTOR CO.
    • Are the resistances greater than 10,000 ohms? 
    • Yes:  GO to AC5  .
    • No:  REPAIR circuit CR152 (GY/YE), RR152 (YE/VT) or VR223 (BU/WH). GO to  AC14.
  5. AC5 CHECK THE PRESSURE SENSOR CIRCUIT VREF FOR AN OPEN 
    • Measure the resistance between OCSM  C3285-3, circuit CR152 (GY/YE), harness side and OCS  pressure sensor C3042-1, circuit CR152 (GY/YE), harness side.
      Fig 3: Measuring Resistance Between OCSM C3285-3, Circuit CR152 (GY/YE), Harness Side And OCS Pressure Sensor C3042-1
      G06100117Courtesy of FORD MOTOR CO.
    • Is the resistance less than 0.5 ohm? 
    • Yes:  GO to AC6  .
    • No:  REPAIR circuit CR152 (GY/YE). GO to  AC14.
  6. AC6 CHECK THE PRESSURE SENSOR RETURN CIRCUIT FOR AN OPEN 
    • Measure the resistance between OCSM  C3285-5, circuit RR152 (YE/VT), harness side and OCS  pressure sensor C3042-3, circuit RR152 (YE/VT), harness side.
      Fig 4: Measuring Resistance Between OCSM C3285-5, Circuit RR152 (YE/VT), Harness Side And OCS Pressure Sensor C3042-3
      G06100118Courtesy of FORD MOTOR CO.
    • Is the resistance less than 0.5 ohm? 
    • Yes:  GO to AC7  .
    • No:  REPAIR circuit RR152 (YE/VT). GO to  AC14.
  7. AC7 CHECK THE PRESSURE SENSOR SIGNAL CIRCUIT FOR AN OPEN 
    • Measure the resistance between OCSM  C3285-4, circuit VR223 (BU/WH), harness side and OCS  pressure sensor C3042-2, circuit VR223 (BU/WH), harness side.
      Fig 5: Measuring Resistance Between OCSM C3285-4, Circuit VR223 (BU/WH), Harness Side And OCS Pressure Sensor C3042-2
      G06100119Courtesy of FORD MOTOR CO.
    • Is the resistance less than 0.5 ohm? 
    • Yes:  GO to AC8  .
    • No:  REPAIR circuit VR223 (BU/WH). GO to  AC14.
  8. AC8 CHECK FOR A SHORT BETWEEN OCS PRESSURE SENSOR CIRCUITS 
    • Measure the resistance between OCS  pressure sensor:
      • 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.
        Fig 6: Measuring Resistance Between OCS Pressure Sensor C3042-1 And C3042-2, Circuit VR223 (BU/WH), Harness Side
        G06100120Courtesy of FORD MOTOR CO.
    • Are the resistances greater than 10,000 ohms? 
  9. AC9 CHECK THE OCS SYSTEM 
    NOTE: Make sure all OCS  system components, restraint system components, sensor electrical connectors and the RCM  electrical connectors are connected before carrying out self-test. If not, DTCs will be recorded.
    • Enter the following diagnostic mode on the scan tool: OCS  System Reset.
    • WARNING: Make sure the front passenger seat repair is complete, the seat and all attached components (head restraint, seat side shield, etc.) are correctly assembled, and the seat is correctly installed to the vehicle before carrying out the System Reset. Failure to follow these instructions may result in incorrect operation of the occupant classification sensor (OCS) system and increases the risk of serious personal injury or death in a crash.
    • NOTE: To prevent system failure, the following precautions must be taken before carrying out the Occupant Classification Sensor (OCS) system reset:
      • Make sure the OCS  system components are connected and no Occupant Classification System Module (OCSM) faults are present, with the exception of DTC C1941. All other OCS  system DTCs must be diagnosed and repaired before carrying out the OCS  system reset.
      • Make sure the voltage to the OCSM  is above 8 volts and less than 18 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 8-second time period has passed after cycling the ignition switch ON before the carrying out the OCS  system reset process.
    • Carry out the OCS  system reset.
    • If the first system reset attempt was unsuccessful, carry out a thorough inspection of the following and repair any concerns found.
      • OCS  system connector and wiring for damage
      • Pressure sensor hose for kinks and/or damage
      • Seat-related wiring harness and body wiring harness terminals and connectors for damage
    • Carry out a second OCS  system reset. If the second attempt is unsuccessful, install a new OCS  system service kit. Refer to OCCUPANT CLASSIFICATION SENSOR - SERVICE KIT .
    • Ignition OFF.
    • Ignition ON.
    • Enter the following diagnostic mode on the scan tool: Self Test - OCSM  .
    • Enter the following diagnostic mode on the scan tool: DataLogger - OCSM  - View and Record All 2290 Fault PIDs.
      • Refer to PID list in Normal Operation to view 2290 fault PIDs.
    • Do any on-demand 2290 fault PIDs indicate a fault and/or was DTC C1941 retrieved on-demand during self-test? 
    • Yes:  GO to  AC12.
    • No:  Fault corrected. GO to  AC14.
  10. AC10 CHECK THE OCS PRESSURE SENSOR CIRCUITS FOR A SHORT TO GROUND 
    • Ignition OFF.
      • 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.
    • Disconnect: OCS  Pressure Sensor C3042.
    • Disconnect: OCSM  C3285.
    • Measure the resistance between OCS  pressure sensor:
      • C3042-1, circuit CR152 (GY/YE), harness side and ground.
      • C3042-2, circuit VR223 (BU/WH), harness side and ground.
      • C3042-3, circuit RR152 (YE/VT), harness side and ground.
        Fig 7: Measuring Resistance Between OCS Pressure Sensor And C3042-1, Circuit CR152 (GY/YE), Harness Side And Ground
        G06100116Courtesy of FORD MOTOR CO.
    • Are the resistances greater than 10,000 ohms? 
    • Yes:  GO to  AC12.
    • No:  REPAIR circuit CR152 (GY/YE), RR152 (YE/VT) or VR223 (BU/WH). GO to  AC14.
  11. AC11 CHECK THE OCS PRESSURE SENSOR CIRCUITS FOR A SHORT TO VOLTAGE 
    • Ignition OFF.
    • Depower the SRS  . Refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING .
    • Disconnect: Passenger Seat Side Air Bag Module C3255. Disconnect: OCS  Pressure Sensor C3042.
    • Disconnect: OCSM  C3285.
    • Repower the SRS  . Do not  prove out the system at this time. Refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING .
    • Ignition ON.
    • Measure the voltage between OCS  pressure sensor:
      • C3042-1, circuit CR152 (GY/YE), harness side and ground.
      • C3042-2, circuit VR223 (BU/WH), harness side and ground.
      • C3042-3, circuit RR152 (YE/VT), harness side and ground.
        Fig 8: Measuring Voltage Between C3042-1, Circuit CR152 (GY/YE), Harness Side And Ground
        G06100115Courtesy of FORD MOTOR CO.
    • Is voltage present on any circuit? 
    • Yes:  REPAIR circuit CR152 (GY/YE), RR152 (YE/VT) or VR223 (BU/WH). GO to  AC14.
    • No:  GO to AC12  .
  12. AC12 CONFIRM THE OCS FAULT 
    NOTE: Make sure all OCS  system components, restraint system components, sensor electrical connectors and the RCM  electrical connectors are connected before carrying out self-test. If not, DTCs will be recorded.
    • Ignition OFF.
      • 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.
    • Prior to reconnecting any previously disconnected SRS  component:
      • OCS  system connector and wiring for damage.
      • pressure sensor hose for kinks and/or damage.
      • seat-related wiring harness and body wiring harness terminals and connectors for damage.
      • inspect wire harness for any damage, pinched, cut or pierced wires.
      • inspect connector(s) (including any in-line connectors) for pushed-out, loose or spread terminals and loose or frayed wire connections at terminals.
      • repair any concerns found.

        Refer to appropriate SYSTEM WIRING DIAGRAMS article, Connector Repair Procedures for schematic and connector information.

    • Connect: OCSM  C3285 (if disconnected previously).
    • Connect: OCS  Pressure Sensor C3042 (if disconnected previously).
    • Enter the following diagnostic mode on the scan tool: Self Test - OCSM  .
    • Enter the following diagnostic mode on the scan tool: DataLogger - OCSM  - View and Record All 2290 Fault PIDs.
      • Refer to PID list in Normal Operation to view 2290 fault PIDs.
    • Does the original on-demand 2290 fault PID indicate a fault or was DTC C1941 retrieved on-demand during self-test? 
    • Yes:  INSTALL a new OCS  system service kit. REFER to OCCUPANT CLASSIFICATION SENSOR - SERVICE KIT . GO to  AC14.
    • No:  In the process of diagnosing the fault, the fault condition has become intermittent. 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.  GO to AC13  .
  13. AC13 CHECK FOR AN INTERMITTENT FAULT 
    • Enter the following diagnostic mode on the scan tool: Self Test - OCSM  .
    • Enter the following diagnostic mode on the scan tool: DataLogger - OCSM  - View and Record All 2290 Fault PIDs.
    • Do any on-demand 2290 fault PIDs indicate a fault? 
    • Yes:  This fault cannot be cleared until it is corrected and the DTC is no longer retrieved on-demand during self-test.

      CHECK for causes of the intermittent fault at or near the affected SRS  component connector. REPAIR any intermittent wiring, terminal or connector concerns found.

      If an intermittent concern was  found and repaired, GO to AC14  .

      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 

      For fault PID 2290_15_OD, GO to  AC3.

      For fault PID 2290_13_OD, GO to  AC10.

      For fault PID 2290_12_OD, GO to  AC11.

      Vehicles with an OCS system service kit : 

      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 - SERVICE KIT . GO to  AC11.

    • No:  CHECK for causes of the intermittent fault. ATTEMPT to recreate the hard fault by flexing the wire harness and cycling the ignition 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.  GO to AC14  .
  14. AC14 CHECK FOR ADDITIONAL SRS DTCs 
    • Ignition OFF.
    • 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 .
    • Ignition ON.
    • Enter the following diagnostic mode on the scan tool: Self Test - Restraints.
    • NOTE: When selecting Restraints from the Self Test menu, DTCs will be retrieved from the RCM  and OCSM  .
    • Are any RCM and/or OCSM DTCs retrieved on-demand during self test? 
    • Yes:  Do not clear any DTCs until all DTCs have been resolved. GO to the DTC CHARTS for pinpoint test direction.
    • No:  CLEAR all RCM  and OCSM CMDTCs  . PROVE OUT the SRS  . Repair is complete. RETURN the vehicle to the customer.
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