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Pinpoint Test Ag: DTC B272D

WARNING: This page is about a different car, the 2013 Ford F-550 Super Duty, 2013 Ford F-450 Super Duty, 2013 Ford F-350 Super Duty, and 2013 Ford F-250 Super Duty. However, it is still accessible from the selected car via links, so may be relevant.
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.
  1. AG1 CHECK THE DCSM FOR DTCs 
    • Enter the following diagnostic mode on the scan tool: Self Test - DCSM.
    • Was DTC B272A or B272B retrieved? 
  2. AG2 MONITOR THE DCSM TED TEMPERATURE PIDs 
    • Enter the following diagnostic mode on the scan tool: DataLogger - DCSM.
      • Passenger cushion thermal electric device (TED) temperature (PCSHTMP)
      • Passenger back TED temperature (PBKTMP)
      • Driver cushion TED temperature (CSHTEMP)
      • Driver back TED temperature (BK_TEMP)
    • NOTE: Make sure the temperature of the climate controlled seats has stabilized before monitoring the PIDs. Not allowing stabilization can cause incorrect readings and lead to incorrect identification of components that are not faulty.

      Monitor the TED temperature PIDs with the climate controlled seats OFF. Compare the PIDs of the front passenger seat to those of the driver seat, this can help identify if there is a concern with the front passenger seat cushion or backrest PID readings.

    • Are both front passenger seat TED temperature PIDs within 10°C (18°F) of the ambient temperature? 
    • Yes  : GO to AG3.
    • No  : If the front passenger seat cushion PID varies 10°C (18°F) or more from ambient temperature, GO to  AG16.

      If the front passenger seat backrest PID varies 10°C (18°F) or more from ambient temperature, GO to  AG32.

  3. AG3 CONFIRM THE FAULT IS IN THE SEAT CUSHION OR BACKREST 
    • Ignition OFF.
    • Ignition ON.
    • NOTE: A crushed seat cushion foam pad or a crushed climate controlled seat manifold may be the cause of the fault. It may be necessary to sit on the seat or place something of reasonable size and weight on the seat to recreate the fault.

      After cycling the ignition and with the engine running, set the passenger seat to high heat. Allow the seat to heat for at least 15 minutes while monitoring the TED temperature PIDs of the passenger seat.

    • Do the passenger seat cushion TED and backrest TED PIDs vary more than 60°C (108°F) from each other? 
    • Yes  : If the front passenger seat cushion PID is 60°C (108°F) hotter than the backrest PID, GO to  AG5.

      If the front passenger seat backrest PID is 60°C (108°F) hotter than the cushion PID, GO to  AG20.

    • No  : GO to AG4.
  4. AG4 CHECK THE TEDs COOLING PERFORMANCE 
    • Yes  : The DTC may have been set by extreme cabin temperatures or excessive sunload on the seat causing the system to enter recovery mode. Occupant size and weight characteristics can also be a factor. CLEAR the DTCs. TEST the system for normal operation. If a concern cannot be found or duplicated, RETURN the vehicle to the customer.
    • No  : CHECK the affected seat cushion or backrest for correct installation of the climate controlled seat components (TED, manifold, plenum, air ducts and foam pad). CHECK for airflow restrictions (TED inlets and outlets, TED-to-manifold or plenum connections, filters and ducts) and REPAIR as needed. CHECK for an intermittent wiring fault. REPAIR as needed. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
  5. AG5 CHECK FOR CORRECT TED INSTALLATION AND FOR CRUSHED FOAM 
    NOTE: If a seat equipped with a seat mounted side air bag is being serviced, the Supplemental Restraint System (SRS) must be depowered. Refer to SUPPLEMENTAL RESTRAINT SYSTEM .
    NOTE: The air bag warning lamp illuminates when the Restraints Control Module (RCM) fuse is removed and the ignition switch is ON. This is normal operation and does not indicate an SRS fault.
    NOTE: The SRS must be fully operational and free of faults before releasing the vehicle to the customer.
    • Ignition OFF.
    • WARNING: Make sure no one is in the vehicle and there is nothing blocking or placed in front of any airbag when the battery is connected. Failure to follow these instructions may result in serious personal injury in the event of an accidental deployment.

      For vehicles equipped with seat side air bags, carry out the following:

      • Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering in the General Procedures portion of SUPPLEMENTAL RESTRAINT SYSTEM .
      • Disconnect the passenger seat side air bag module C339.
      • Connect the battery ground cable. Refer to BATTERY, MOUNTING AND CABLES .
    • Remove the passenger seat. Refer to SEAT - FRONT, BUCKET SEAT .
    • Remove the passenger seat cushion trim cover. Refer to SEAT CUSHION - FRONT, BUCKET SEAT .
    • Inspect the seat cushion for the following:
      • Is the cushion blower obstructed?
      • Is the blower filter restricted or plugged?
      • Is the TED correctly installed?
      • Is the seat cushion foam pad crushed or restricted?
      • Is the climate controlled seat manifold crushed or restricted?
    • Is the TED correctly installed and the foam pad and manifold OK? 
    • Yes  : GO to AG6.
    • No  : Correctly INSTALL the passenger cushion TED or INSTALL a new seat cushion foam pad and/or climate controlled seat manifold. CLEAR the DTCs. REPEAT the self-test.

      For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. CONNECT passenger seat side air bag module C339. REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

  6. AG6 CHECK THE PASSENGER BACKREST TED-CIRCUIT FOR A SHORT TO VOLTAGE 
    • Ignition OFF.
    • Position the front passenger seat in the vehicle and connect the seat-to-floor connectors.
    • Disconnect: DCSM C3265A.
    • Ignition ON.
    • Measure the voltage between DCSM C3265A-D, circuit RHS06 (WH), harness side and ground.
      Fig 1: Measuring Voltage Between DCSM C3265A-D, Circuit RHS06 (WH) And Ground
      G06134491Courtesy of FORD MOTOR CO.
    • Is any voltage present? 
    • Yes  : REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.

      For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. CONNECT passenger seat side air bag module C339. REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

    • No  : GO to AG7.
  7. AG7 CHECK THE PASSENGER BACKREST TED CIRCUIT FOR A SHORT TO GROUND 
    • Ignition OFF.
    • Measure the resistance between DCSM C3265A-C, circuit CHS06 (BU/BN), harness side and ground.
      Fig 2: Measuring Resistance Between DCSM C3265A-C, Circuit CHS06 (BU/BN) And Ground
      G06134492Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 10, 000 ohms? 
    • Yes  : GO to AG8.
    • No  : REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.

      For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. CONNECT passenger seat side air bag module C339. REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

  8. AG8 CHECK THE PASSENGER BACKREST TED AND WIRING RESISTANCE 
    • Measure the resistance between DCSM C3265A-C, circuit CHS06 (BU/BN), harness side and DCSM C3265A-D, circuit RHS06 (WH), harness side.
      Fig 3: Measuring Resistance Between DCSM C3265A-C, Circuit CHS06 (BU/BN) And DCSM C3265A-D, Circuit RHS06 (WH)
      G06076998Courtesy of FORD MOTOR CO.
    • Is the resistance between 0.9 and 10 ohms? 
    • Yes  : GO to  AG10.
    • No  : GO to AG9.
  9. AG9 CHECK THE PASSENGER BACKREST TED RESISTANCE 
    • Disconnect: Passenger Backrest TED C3039.
    • Measure the resistance between passenger backrest TED C3039 pins 1 and 3, component side.
      Fig 4: Measuring Resistance Between Passenger Backrest TED C3039 Pins 1 And 3
      G06076908Courtesy of FORD MOTOR CO.
    • Is the resistance between 0.9 and 10 ohms? 
    • Yes  : REPAIR circuit(s) CHS06 (BU/BN) and/or RHS06 (WH) for an open. CLEAR the DTCs. REPEAT the self-test.

      For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. CONNECT passenger seat side air bag module C339. REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

    • No  : INSTALL a new passenger backrest TED. REFER to SEAT BACKREST - FRONT, BUCKET SEAT . CLEAR the DTCs. REPEAT the self-test.

      For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. CONNECT passenger seat side air bag module C339. REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

  10. AG10 CHECK THE BLOWER AND SPEED CONTROL CIRCUITS FOR A SHORT TO VOLTAGE 
    • Disconnect: DCSM C3265C.
    • Ignition ON.
    • Measure the voltage between:
      • DCSM C3265C-8, circuit CHS08 (BN/YE), harness side and ground.
      • DCSM C3265C-3, circuit VHS23 (BN/BU), harness side and ground.
        Fig 5: Checking Blower And Speed Control Circuits For Short To Voltage
        G06255587Courtesy of FORD MOTOR CO.
    • Is any voltage present on either circuit? 
    • Yes  : REPAIR the circuit(s). CLEAR the DTCs. REPEAT the self-test.

      For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. CONNECT passenger seat side air bag module C339. REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

    • No  : GO to AG11.
  11. AG11 CHECK THE BLOWER AND SPEED CONTROL CIRCUITS FOR A SHORT TO GROUND 
    • Ignition OFF.
    • Measure the resistance between:
      • DCSM C3265C-8, circuit CHS08 (BN/YE), harness side and ground.
      • DCSM C3265C-3, circuit VHS23 (BN/BU), harness side and ground.
        Fig 6: Checking Blower And Speed Control Circuits For Short To Ground
        G06077001Courtesy of FORD MOTOR CO.
    • Are the resistances greater than 10, 000 ohms? 
    • Yes  : GO to AG12.
    • No  : REPAIR the circuit(s). CLEAR the DTCs. REPEAT the self-test.

      For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. CONNECT passenger seat side air bag module C339. REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

  12. AG12 CHECK THE BLOWER AND WIRING RESISTANCE 
    • NOTE: The ohmmeter must be connected with the positive lead to DCSM C3265C-8, circuit CHS08 (BN/YE) and the negative lead to DCSM C3265C-7, circuit RHS08 (VT/WH) when measuring. Ohmmeter leads incorrectly connected can result in false readings and lead to incorrect identification of components that are not faulty.

      Measure the resistance between DCSM C3265C-8, circuit CHS08 (BN/YE), harness side and DCSM C3265C-7, circuit RHS08 (VT/WH), harness side.

      Fig 7: Measuring Resistance Between DCSM C3265C-8, Circuit CHS08 (BN/YE) And DCSM C3265C-7, Circuit RHS08 (VT/WH)
      G06077002Courtesy of FORD MOTOR CO.
    • Is the resistance between 4, 000 and 10, 000 ohms? 
    • Yes  : GO to  AG14.
    • No  : GO to AG13.
  13. AG13 CHECK THE BLOWER RESISTANCE 
    • Disconnect: Passenger Cushion TED C3040.
    • NOTE: The ohmmeter must be connected with the positive lead to pin 2 and the negative lead to pin 4 when measuring. Ohmmeter leads incorrectly connected can result in false readings and lead to incorrect identification of components that are not faulty.

      Measure the resistance between passenger cushion TED C3040 pins 2 and 4, component side.

      Fig 8: Measuring Resistance Between Passenger Cushion TED C3040 Pins 2 And 4
      G06077017Courtesy of FORD MOTOR CO.
    • Is the resistance between 4, 000 and 10, 000 ohms? 
    • Yes  : REPAIR circuit(s) CHS08 (BN/YE) and/or RHS08 (VT/WH) for an open. CLEAR the DTCs. REPEAT the self-test.

      For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. CONNECT passenger seat side air bag module C339. REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

    • No  : INSTALL a new passenger cushion TED. REFER to SEAT CUSHION - FRONT, BUCKET SEAT . CLEAR the DTCs. REPEAT the self-test.

      For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. CONNECT passenger seat side air bag module C339. REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

  14. AG14 CHECK THE BLOWER SPEED CONTROL AND CIRCUIT RESISTANCE 
    • NOTE: The ohmmeter must be connected with the positive lead to C3265C-3, circuit VHS23 (BN/BU), harness side and the negative lead to C3265C-7, circuit RHS08 (VT/WH), harness side when measuring. Ohmmeter leads incorrectly connected can result in false readings and lead to incorrect identification of components that are not faulty.

      Measure the resistance between DCSM C3265C-3, circuit VHS23 (BN/BU), harness side and DCSM C3265C-7, circuit RHS08 (VT/WH), harness side.

      Fig 9: Measuring Resistance Between DCSM C3265C-3, Circuit VHS23 (BN/BU) And DCSM C3265C-7, Circuit RHS08 (VT/WH)
      G06077004Courtesy of FORD MOTOR CO.
    • Is the resistance between 240K ohms and 4M ohms? 
    • Yes  : GO to  AG16.
    • No  : GO to AG15.
  15. AG15 CHECK THE BLOWER SPEED CONTROL RESISTANCE 
    • Disconnect: Passenger Cushion TED C3040.
    • NOTE: The ohmmeter must be connected with the positive lead to pin 7 and the negative lead to pin 4 when measuring. Ohmmeter leads incorrectly connected can result in false readings and lead to incorrect identification of components that are not faulty.

      Measure the resistance between passenger cushion TED C3040 pins 7 and 4, component side.

      Fig 10: Measuring Resistance Between Passenger Cushion TED C3040 Pins 7 And 4
      G06076991Courtesy of FORD MOTOR CO.
    • Is the resistance between 240K ohms and 4M ohms? 
    • Yes  : REPAIR circuit(s) VHS23 (BN/BU) and/or RHS08 (VT/WH) for an open. CLEAR the DTCs. REPEAT the self-test.

      For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. CONNECT passenger seat side air bag module C339. REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

    • No  : INSTALL a new passenger cushion TED. REFER to SEAT CUSHION - FRONT, BUCKET SEAT . CLEAR the DTCs. REPEAT the self-test.

      For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. CONNECT passenger seat side air bag module C339. REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

  16. AG16 CHECK THE THERMISTOR CIRCUIT FOR A SHORT TO VOLTAGE 
    NOTE: If a seat equipped with a seat mounted side air bag is being serviced, the Supplemental Restraint System (SRS) must be depowered. Refer to SUPPLEMENTAL RESTRAINT SYSTEM .
    NOTE: The air bag warning lamp illuminates when the Restraints Control Module (RCM) fuse is removed and the ignition switch is ON. This is normal operation and does not indicate an SRS fault.
    NOTE: The SRS must be fully operational and free of faults before releasing the vehicle to the customer.
    • Ignition OFF.
    • WARNING: Make sure no one is in the vehicle and there is nothing blocking or placed in front of any airbag when the battery is connected. Failure to follow these instructions may result in serious personal injury in the event of an accidental deployment.

      For vehicles equipped with seat side air bags, carry out the following:

      • Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering in the General Procedures portion of SUPPLEMENTAL RESTRAINT SYSTEM .
      • Disconnect the passenger seat side air bag module C339.
      • Connect the battery ground cable. Refer to BATTERY, MOUNTING AND CABLES .
    • Disconnect: DCSM C3265B.
    • Ignition ON.
    • Measure the voltage between DCSM C3265B-2, circuit VHS27 (WH/OG), harness side and ground.
      Fig 11: Measuring Voltage Between DCSM C3265B-2, Circuit VHS27 (WH/OG) And Ground
      G06134501Courtesy of FORD MOTOR CO.
    • Is any voltage present? 
    • Yes  : REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.

      For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. CONNECT passenger seat side air bag module C339. REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

    • No  : GO to AG17.
  17. AG17 CHECK THE THERMISTOR CIRCUIT FOR A SHORT TO GROUND 
    • Ignition OFF.
    • Measure the resistance between DCSM C3265B-2, circuit VHS27 (WH/OG), harness side and ground.
      Fig 12: Measuring Resistance Between DCSM C3265B-2, Circuit VHS27 (WH/OG) And Ground
      G06077007Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 10, 000 ohms? 
    • Yes  : GO to AG18.
    • No  : REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.

      For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. CONNECT passenger seat side air bag module C339. REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

  18. AG18 CHECK THE TED THERMISTOR AND WIRING RESISTANCE 
    • Measure the resistance between DCSM C3265B-2, circuit VHS27 (WH/OG), harness side and DCSM C3265B-3, circuit RHS10 (BU/OG), harness side. Note the ambient temperature and compare result to the following table:
      Temperature Resistance
      0-10°C (32-50°F) 2, 782-1, 663 ohms
      10-20°C (50-68°F) 1, 837-1, 140 ohms
      20-30°C (68-86°F) 1, 260-806 ohms
      30-40°C (86-104°F) 893-570 ohms
      40-50°C (104-122°F) 630-428 ohms
      Fig 13: Measuring Resistance Between DCSM C3265B-2, Circuit VHS27 (WH/OG) And DCSM C3265B-3, Circuit RHS10 (BU/OG)
      G06134503Courtesy of FORD MOTOR CO.
    • Is the resistance within the limits indicated? 
    • Yes  : GO to  AG35.
    • No  : GO to AG19.
  19. AG19 CHECK THE TED THERMISTOR RESISTANCE 
    • Disconnect: Passenger Cushion TED C3040.
    • Measure the resistance between passenger cushion TED pins 5 and 8, component side. Note the ambient temperature and compare result to the following table:
      Temperature Resistance
      0-10°C (32-50°F) 2, 782-1, 663 ohms
      10-20°C (50-68°F) 1, 837-1, 140 ohms
      20-30°C (68-86°F) 1, 260-806 ohms
      30-40°C (86-104°F) 893-570 ohms
      40-50°C (104-122°F) 630-428 ohms
      Fig 14: Measuring Resistance Between Passenger Cushion TED Pins 5 And 8
      G06076995Courtesy of FORD MOTOR CO.
    • Is the resistance within the limits indicated? 
    • Yes  : REPAIR circuit(s) VHS27 (WH/OG) and/or RHS10 (BU/OG) for an open. CLEAR the DTCs. REPEAT the self-test.

      For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. CONNECT passenger seat side air bag module C339. REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

    • No  : INSTALL a new passenger cushion TED. REFER to SEAT CUSHION - FRONT, BUCKET SEAT . CLEAR the DTCs. REPEAT the self-test.

      For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. CONNECT passenger seat side air bag module C339. REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

  20. AG20 CHECK FOR CORRECT TED INSTALLATION AND FOR CRUSHED FOAM 
    NOTE: If a seat equipped with a seat mounted side air bag is being serviced, the Supplemental Restraint System (SRS) must be depowered. Refer to SUPPLEMENTAL RESTRAINT SYSTEM .
    NOTE: The air bag warning lamp illuminates when the Restraints Control Module (RCM) fuse is removed and the ignition switch is ON. This is normal operation and does not indicate an SRS fault.
    NOTE: The SRS must be fully operational and free of faults before releasing the vehicle to the customer.
    • Ignition OFF.
    • WARNING: Make sure no one is in the vehicle and there is nothing blocking or placed in front of any airbag when the battery is connected. Failure to follow these instructions may result in serious personal injury in the event of an accidental deployment.

      For vehicles equipped with seat side air bags, carry out the following:

      • Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering in the General Procedures portion of SUPPLEMENTAL RESTRAINT SYSTEM .
      • Disconnect the passenger seat side air bag module C339.
      • Connect the battery ground cable. Refer to BATTERY, MOUNTING AND CABLES .
    • Remove the passenger seat. Refer to SEAT - FRONT, BUCKET SEAT .
    • Remove the passenger seat backrest trim cover. Refer to SEAT BACKREST - FRONT, BUCKET SEAT .
    • Inspect the seat backrest for the following:
      • Is the backrest blower obstructed?
      • Is the blower filter restricted or plugged?
      • Is the TED correctly installed?
      • Is the seat backrest foam pad crushed or restricted?
      • Is the climate controlled seat manifold crushed or restricted?
    • Is the TED correctly installed and the foam pad and manifold OK? 
    • Yes  : GO to AG21.
    • No  : Correctly INSTALL the passenger backrest TED or INSTALL a new seat backrest foam pad and/or climate controlled seat manifold. REFER to SEAT BACKREST - FRONT, BUCKET SEAT . CLEAR the DTCs. REPEAT the self-test.

      For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. CONNECT passenger seat side air bag module C339. REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

  21. AG21 CHECK THE PASSENGER CUSHION TED CIRCUIT FOR A SHORT TO VOLTAGE 
    • Ignition OFF.
    • Position the front passenger seat in the vehicle and connect the seat-to-floor connectors.
    • Disconnect: DCSM C3265A.
    • Ignition ON.
    • Measure the voltage between DCSM C3265A-B, circuit RHS07 (BU), harness side and ground.
      Fig 15: Measuring Voltage Between DCSM C3265A-B, Circuit RHS07 (BU) And Ground
      G06077010Courtesy of FORD MOTOR CO.
    • Is any voltage present? 
    • Yes  : REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.

      For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. CONNECT passenger seat side air bag module C339. REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

    • No  : GO to AG22.
  22. AG22 CHECK THE PASSENGER CUSHION TED CIRCUIT FOR A SHORT TO GROUND 
    • Ignition OFF.
    • Measure the resistance between DCSM C3265A-A, circuit CHS07 (GY/BU), harness side and ground.
      Fig 16: Measuring Resistance Between DCSM C3265A-A, Circuit CHS07 (GY/BU) And Ground
      G06134506Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 10, 000 ohms? 
    • Yes  : GO to AG23.
    • No  : REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.

      For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. CONNECT passenger seat side air bag module C339. REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

  23. AG23 CHECK THE PASSENGER CUSHION TED AND WIRING RESISTANCE 
    • Measure the resistance between DCSM C3265A-A circuit CHS07 (GY/BU), harness side and DCSM C3265A-B, circuit RHS07 (BU), harness side.
      Fig 17: Measuring Resistance Between DCSM C3265A-A Circuit CHS07 (GY/BU) And DCSM C3265A-B, Circuit RHS07 (BU)
      G06255599Courtesy of FORD MOTOR CO.
    • Is the resistance between 0.9 and 10 ohms? 
    • Yes  : GO to  AG25.
    • No  : GO to AG24.
  24. AG24 CHECK THE PASSENGER CUSHION TED RESISTANCE 
    • Disconnect: Passenger Cushion TED C3040.
    • Measure the resistance between passenger cushion TED C3040 pins 1 and 3, component side.
      Fig 18: Measuring Resistance Between Passenger Cushion TED C3040 Pins 1 And 3
      G06076908Courtesy of FORD MOTOR CO.
    • Is the resistance between 0.9 and 10 ohms? 
    • Yes  : REPAIR circuit(s) CHS07 (GY/BU) and/or RHS07 (BU) for an open. CLEAR the DTCs. REPEAT the self-test.

      For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. CONNECT passenger seat side air bag module C339. REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

    • No  : INSTALL a new passenger cushion TED. REFER to SEAT CUSHION - FRONT, BUCKET SEAT . CLEAR the DTCs. REPEAT the self-test.

      For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. CONNECT passenger seat side air bag module C339. REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

  25. AG25 CHECK THE BLOWER AND SPEED CONTROL CIRCUITS FOR A SHORT TO VOLTAGE 
    • Disconnect: DCSM C3265C.
    • Ignition ON.
    • Measure the voltage between:
      • DCSM C3265C-8, circuit CHS08 (BN/YE), harness side and ground.
      • DCSM C3265C-4, circuit VHS21 (BU/WH), harness side and ground.
        Fig 19: Checking Blower And Speed Control Circuits For Short To Voltage
        G06134509Courtesy of FORD MOTOR CO.
    • Is any voltage present on either circuit? 
    • Yes  : REPAIR the circuit(s). CLEAR the DTCs. REPEAT the self-test.

      For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. CONNECT passenger seat side air bag module C339. REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

    • No  : GO to AG26.
  26. AG26 CHECK THE BLOWER AND SPEED CONTROL CIRCUITS FOR A SHORT TO GROUND 
    • Ignition OFF.
    • Measure the resistance between:
      • DCSM C3265C-8, circuit CHS08 (BN/YE), harness side and ground.
      • DCSM C3265C-4, circuit VHS21 (BU/WH), harness side and ground.
        Fig 20: Checking Blower And Speed Control Circuits For Short To Ground
        G06255602Courtesy of FORD MOTOR CO.
    • Are the resistances greater than 10, 000 ohms? 
    • Yes  : GO to AG27.
    • No  : REPAIR the circuit(s). CLEAR the DTCs. REPEAT the self-test.

      For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. CONNECT passenger seat side air bag module C339. REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

  27. AG27 CHECK THE BLOWER AND WIRING RESISTANCE 
    • NOTE: The ohmmeter must be connected with the positive lead to DCSM C3265C-8, circuit CHS08 (BN/YE) and the negative lead to DCSM C3265C-7, circuit RHS08 (VT/WH) when measuring. Ohmmeter leads incorrectly connected can result in false readings and lead to incorrect identification of components that are not faulty.

      Measure the resistance between DCSM C3265C-8, circuit CHS08 (BN/YE), harness side and DCSM C3265C-7, circuit RHS08 (VT/WH), harness side.

      Fig 21: Measuring Resistance Between DCSM C3265C-8, Circuit CHS08 (BN/YE) And DCSM C3265C-7, Circuit RHS08 (VT/WH)
      G06077002Courtesy of FORD MOTOR CO.
    • Is the resistance between 4, 000 and 10, 000 ohms? 
    • Yes  : GO to  AG29.
    • No  : GO to AG28.
  28. AG28 CHECK THE BLOWER RESISTANCE 
    • Disconnect: Passenger Backrest TED C3039.
    • NOTE: The ohmmeter must be connected with the positive lead to pin 2 and the negative lead to pin 4 when measuring. Ohmmeter leads incorrectly connected can result in false readings and lead to incorrect identification of components that are not faulty.

      Measure the resistance between passenger backrest TED C3039 pins 2 and 4, component side.

      Fig 22: Measuring Resistance Between Passenger Backrest TED C3039 Pins 2 And 4
      G06077017Courtesy of FORD MOTOR CO.
    • Is the resistance between 4, 000 and 10, 000 ohms? 
    • Yes  : REPAIR circuit(s) CHS08 (BN/YE) and/or RHS08 (VT/WH) for an open. CLEAR the DTCs. REPEAT the self-test.

      For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. CONNECT passenger seat side air bag module C339. REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

    • No  : INSTALL a new passenger backrest TED. REFER to SEAT BACKREST - FRONT, BUCKET SEAT . CLEAR the DTCs. REPEAT the self-test.

      For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. CONNECT passenger seat side air bag module C339. REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

  29. AG29 CHECK THE BLOWER SPEED CONTROL AND CIRCUIT RESISTANCE 
    • NOTE: The ohmmeter must be connected with the positive lead to C3265C-4, circuit VHS21 (BU/WH), harness side and the negative lead to C3265C-7, circuit RHS08 (VT/WH), harness side when measuring. Ohmmeter leads incorrectly connected can result in false readings and lead to incorrect identification of components that are not faulty.

      Measure the resistance between DCSM C3265C-4, circuit VHS21 (BU/WH), harness side and DCSM C3265C-7, circuit RHS08 (VT/WH), harness side.

      Fig 23: Measuring Resistance Between DCSM C3265C-4, Circuit VHS21 (BU/WH) And DCSM C3265C-7, Circuit RHS08 (VT/WH)
      G06134513Courtesy of FORD MOTOR CO.
    • Is the resistance between 240K ohms and 4M ohms? 
    • Yes  : GO to  AG31.
    • No  : GO to AG30.
  30. AG30 CHECK THE BLOWER SPEED CONTROL RESISTANCE 
    • Disconnect: Passenger Backrest TED C3039.
    • NOTE: The ohmmeter must be connected with the positive lead to pin 7 and the negative lead to pin 4 when measuring. Ohmmeter leads incorrectly connected can result in false readings and lead to incorrect identification of components that are not faulty.

      Measure the resistance between passenger backrest TED C3039 pins 7 and 4, component side.

      Fig 24: Measuring Resistance Between Passenger Backrest TED C3039 Pins 7 And 4
      G06076991Courtesy of FORD MOTOR CO.
    • Is the resistance between 240K ohms and 4M ohms? 
    • Yes  : REPAIR circuit(s) VHS21 (BU/WH) and/or RHS08 (VT/WH) for an open. CLEAR the DTCs. REPEAT the self-test.

      For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. CONNECT passenger seat side air bag module C339. REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

    • No  : INSTALL a new passenger backrest TED. REFER to SEAT BACKREST - FRONT, BUCKET SEAT . CLEAR the DTCs. REPEAT the self-test.

      For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. CONNECT passenger seat side air bag module C339. REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

  31. AG31 CHECK THE THERMISTOR CIRCUIT FOR A SHORT TO VOLTAGE 
    • Disconnect: DCSM C3265B.
    • Ignition ON.
    • Measure the voltage between DCSM C3265B-4, circuit VHS36 (YE/BU), harness side and ground.
      Fig 25: Measuring Voltage Between DCSM C3265B-4, Circuit VHS36 (YE/BU) And Ground
      G06077020Courtesy of FORD MOTOR CO.
    • Is any voltage present? 
    • Yes  : REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.

      For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. CONNECT passenger seat side air bag module C339. REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

    • No  : GO to AG32.
  32. AG32 CHECK THE THERMISTOR CIRCUIT FOR A SHORT TO GROUND 
    NOTE: If a seat equipped with a seat mounted side air bag is being serviced, the Supplemental Restraint System (SRS) must be depowered. Refer to SUPPLEMENTAL RESTRAINT SYSTEM .
    NOTE: The air bag warning lamp illuminates when the Restraints Control Module (RCM) fuse is removed and the ignition switch is ON. This is normal operation and does not indicate an SRS fault.
    NOTE: The SRS must be fully operational and free of faults before releasing the vehicle to the customer.
    • Ignition OFF.
    • WARNING: Make sure no one is in the vehicle and there is nothing blocking or placed in front of any airbag when the battery is connected. Failure to follow these instructions may result in serious personal injury in the event of an accidental deployment.

      For vehicles equipped with seat side air bags, carry out the following:

      • Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering in the General Procedures portion of SUPPLEMENTAL RESTRAINT SYSTEM .
      • Disconnect the passenger seat side air bag module C339.
      • Connect the battery ground cable. Refer to BATTERY, MOUNTING AND CABLES .
    • Disconnect: DCSM C3265B.
    • Measure the resistance between DCSM C3265B-4, circuit VHS36 (YE/BU), harness side and ground.
      Fig 26: Measuring Resistance Between DCSM C3265B-4, Circuit VHS36 (YE/BU) And Ground
      G06077021Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 10, 000 ohms? 
    • Yes  : GO to AG33.
    • No  : REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.

      For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. CONNECT passenger seat side air bag module C339. REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

  33. AG33 CHECK THE PASSENGER TED THERMISTOR AND WIRING RESISTANCE AT THE DCSM 
    • Measure the resistance between DCSM C3265B-4, circuit VHS36 (YE/BU), harness side and DCSM C3265B-5, circuit RHS20 (GN/BU), harness side. Note the ambient temperature and compare result to the following table:
      Temperature Resistance
      0-10°C (32-50°F) 2, 782-1, 663 ohms
      10-20°C (50-68°F) 1, 837-1, 140 ohms
      20-30°C (68-86°F) 1, 260-806 ohms
      30-40°C (86-104°F) 893-570 ohms
      40-50°C (104-122°F) 630-428 ohms
      Fig 27: Measuring Resistance Between DCSM C3265B-4, Circuit VHS36 (YE/BU) And DCSM C3265B-5, Circuit RHS20 (GN/BU)
      G06077022Courtesy of FORD MOTOR CO.
    • Is the resistance within the limits indicated? 
    • Yes  : GO to  AG35.
    • No  : GO to AG34.
  34. AG34 CHECK THE PASSENGER TED THERMISTOR RESISTANCE 
    • Disconnect: Passenger Backrest TED C3039.
    • Measure the resistance between passenger backrest TED pins 5 and 8, component side. Note the ambient temperature and compare result to the following table:
      Temperature Resistance
      0-10°C (32-50°F) 2, 782-1, 663 ohms
      10-20°C (50-68°F) 1, 837-1, 140 ohms
      20-30°C (68-86°F) 1, 260-806 ohms
      30-40°C (86-104°F) 893-570 ohms
      40-50°C (104-122°F) 630-428 ohms
      Fig 28: Measuring Resistance Between Passenger Backrest TED Pins 5 And 8
      G06076995Courtesy of FORD MOTOR CO.
    • Is the resistance within the limits indicated? 
    • Yes  : REPAIR circuit(s) VHS36 (YE/BU) and/or RHS20 (GN/BU) for an open. CLEAR the DTCs. REPEAT the self-test.

      For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. CONNECT passenger seat side air bag module C339. REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

    • No  : INSTALL a new passenger backrest TED. REFER to SEAT BACKREST - FRONT, BUCKET SEAT . CLEAR the DTCs. REPEAT the self-test.

      For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. CONNECT passenger seat side air bag module C339. REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

  35. AG35 CHECK FOR CORRECT DCSM OPERATION 
    • Disconnect all the DCSM electrical connectors.
    • Check the harness and component side connectors for the following:
      • corrosion.
      • damaged pins.
      • pushed-out pins.
    • Connect all the DCSM electrical connectors and make sure they seat correctly.
    • Start the engine.
    • Operate the climate controlled seats and verify system operation.
    • CLEAR all CMDTCs.
    • Enter the following diagnostic mode on the scan tool: Self Test - DCSM.
    • Is DTC B272D still present? 
    • Yes  : INSTALL a new DCSM. REFER to DUAL CLIMATE CONTROLLED SEAT MODULE (DCSM) . CLEAR all CMDTCs. REPEAT the self-test.

      For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. CONNECT passenger seat side air bag module C339. REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

    • No  : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR all CMDTCs. REPEAT the self-test.

      For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. CONNECT passenger seat side air bag module C339. REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

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