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Pinpoint Test AU : DTC B272D

WARNING: This page is about a different car, the 2017 Lincoln Navigator and 2017 Ford Expedition. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: When taking measurements at Front Seat Climate Control Module (SCME) harness connectors, do not insert the electrical probes into the female connector pins. Inserting the probes into connector pins can cause intermittent or open electrical connections after reassembly resulting in Diagnostic Trouble Codes (DTCs) and system failure. Touching the tip of these connector pins is recommended instead.
NOTE: The airbag warning indicator illuminates when the correct RCM fuse is removed and the ignition is ON.
NOTE: The SRS must be fully operational and free of faults before releasing the vehicle to the customer.

  1. AU1 CHECK Front Seat Climate Control Module (SCME) DTCs

    • Enter the following diagnostic mode on the scan tool: Self Test - Front Seat Climate Control Module (SCME).

    Was DTC B272A or B272B retrieved? 

    Yes  For DTC B272A, GO to Pinpoint Test AR . For DTC B272B, GO to Pinpoint Test AS .
    No  GO to  AU2.

  2. AU2 MONITOR THE Front Seat Climate Control Module (SCME) TED TEMPERATURE PIDs

    • Enter the following diagnostic mode on the scan tool: DataLogger - Front Seat Climate Control Module (SCME) - PIDs.
      • Passenger cushion TED temperature (PCSHTMP)
      • Passenger back TED temperature (PBKTMP)
      • Seat cushion thermal electric device temperature (CSHTEMP)
      • Seat back thermal electric device 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 PID values 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 value readings.

    Are both front passenger seat TED temperature PID values within 10 °C (18 °F) of the ambient temperature? 

    Yes  GO to  AU3.
    No  If the front passenger seat cushion PID value varies 10 °C (18 °F) or more from ambient temperature, GO to  AU16.If the front passenger seat backrest PID value varies 10 °C (18 °F) or more from ambient temperature, GO to  AU31.

  3. AU3 CONFIRM THE FAULT IS IN THE SEAT CUSHION OR THE 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 driver seat to HIGH heat. Allow the seat to heat for at least 15 minutes while monitoring the TED temperature PIDs of the driver seat.

    Do the front passenger seat cushion or backrest PID values vary more than 60 °C (108 °F)? 

    Yes  If the front passenger seat cushion PID value is 60 °C (108 °F) hotter than the backrest PID value, GO to  AU5.If the front passenger seat backrest PID value is 60 °C (108 °F) hotter than the cushion PID value, GO to  AU20.
    No  GO to  AU4.

  4. AU4 CHECK THE TED COOLING PERFORMANCE

    Did the TEDs pass the component test? 

    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. REPEAT the self-test. 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.

  5. AU5 CHECK THE TED INSTALLATION AND FOR A CRUSHED SEAT CUSHION

    • Ignition OFF.
    • 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 are there no signs of damage to the foam pad and manifold? 

    Yes  This indicates the concern is not the fault of the cushion components. GO to  AU6.
    No  CORRECTLY install the cushion TED or INSTALL a new seat cushion foam pad and/or climate controlled seat manifold. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. CONNECT passenger seat side airbag C3052. REPOWER the SRS. REFER to Supplemental Restraint System .

  6. AU6 CHECK THE BACKREST TED CIRCUIT FOR A SHORT TO VOLTAGE

    • Disconnect: Front Seat Climate Control Module (SCME) C3265A.
    • NOTE: Do not connect the seat side airbag electrical connectors at this time.

      Position the front passenger seat in the vehicle and connect the seat-to-floor connectors.

    • 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.

      Connect the battery ground cable. Refer to Battery, Mounting and Cables .

    • Ignition ON.
    • Measure the voltage between Front Seat Climate Control Module (SCME) C3265A-D , circuit RHS06 (WH), harness side and ground.
    1. GFD137514Courtesy of FORD MOTOR COMPANY

    Is the voltage less than 0.5 volt? 

    Yes  GO to  AU7.
    No  REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. CONNECT passenger seat side airbag C3052. REPOWER the SRS. REFER to Supplemental Restraint System .

  7. AU7 CHECK THE BACKREST TED CIRCUIT FOR A SHORT TO GROUND

    • Ignition OFF.
    • Measure the resistance between Front Seat Climate Control Module (SCME) C3265A-C , circuit CHS06 (BU/BN), harness side and ground.
    1. GFD137515Courtesy of FORD MOTOR COMPANY

    Is the resistance greater than 10, 000 ohms? 

    Yes  GO to  AU8.
    No  REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. CONNECT passenger seat side airbag C3052. REPOWER the SRS. REFER to Supplemental Restraint System .

  8. AU8 CHECK RESISTANCE OF THE BACKREST TED AND WIRING

    • Measure the resistance between Front Seat Climate Control Module (SCME) C3265A-C , circuit CHS06 (BU/BN), harness side and Front Seat Climate Control Module (SCME) C3265A-D , circuit RHS06 (WH), harness side.
    1. GFD137495Courtesy of FORD MOTOR COMPANY

    Is the resistance between 0.9 and 10 ohms? 

    Yes  GO to  AU10.
    No  GO to  AU9.

  9. AU9 CHECK RESISTANCE OF THE BACKREST TED

    • Disconnect: Passenger Seat Backrest TED C3039.
    • Measure the resistance between passenger seat backrest TED C3039 pin 1 and pin 3, component side.
    1. GFD137432Courtesy of FORD MOTOR COMPANY

    Is the resistance between 0.9 and 10 ohms? 

    Yes  REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. CONNECT passenger seat side airbag C3052. REPOWER the SRS. REFER to Supplemental Restraint System .
    No  INSTALL a new backrest TED. REFER to Seat Backrest Thermo-Electric Device . CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. CONNECT passenger seat side airbag C3052. REPOWER the SRS. REFER to Supplemental Restraint System .

  10. AU10 CHECK THE BLOWER AND SPEED CONTROL CIRCUITS FOR A SHORT TO VOLTAGE

    • Disconnect: Front Seat Climate Control Module (SCME) C3265C.
    • Ignition ON.
    • Measure the voltage between:
      • Front Seat Climate Control Module (SCME) C3265C-8 , circuit CHS14 (GN), harness side and ground.
      • Front Seat Climate Control Module (SCME) C3265C-3 , circuit RHS08 (VT/WH), harness side and ground.
    1. GFD137516Courtesy of FORD MOTOR COMPANY

    Is voltage present on any circuit? 

    Yes  REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. CONNECT passenger seat side airbag C3052. REPOWER the SRS. REFER to Supplemental Restraint System .
    No  GO to  AU11.

  11. AU11 CHECK THE BLOWER AND SPEED CONTROL CIRCUITS FOR A SHORT TO GROUND

    • Ignition OFF.
    • Measure the resistance between:
      • Front Seat Climate Control Module (SCME) C3265C-8 , circuit CHS14 (GN), harness side and ground.
      • Front Seat Climate Control Module (SCME) C3265C-3 , circuit RHS08 (VT/WH), harness side and ground.
    1. GFD137517Courtesy of FORD MOTOR COMPANY

    Are the resistances greater than 10, 000 ohms? 

    Yes  GO to  AU12.
    No  REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. CONNECT passenger seat side airbag C3052. REPOWER the SRS. REFER to Supplemental Restraint System .

  12. AU12 CHECK THE BLOWER AND WIRING

    • NOTE: The ohmmeter must be connected with the positive lead to Front Seat Climate Control Module (SCME) C3265C-8 , circuit CHS14 (GN) and the negative lead to Front Seat Climate Control Module (SCME) C3265C-7 , circuit CHS08 (BN/YE) when measuring. Ohmmeter leads incorrectly connected will result in false readings and lead to incorrect identification of components that are not faulty.

      Measure the resistance between Front Seat Climate Control Module (SCME) C3265C-8 , circuit CHS14 (GN), harness side and Front Seat Climate Control Module (SCME) C3265C-7 , circuit CHS08 (BN/YE), harness side.

    1. GFD137518Courtesy of FORD MOTOR COMPANY

    Is the resistance between 4, 000 ohms and 10, 000 ohms? 

    Yes  GO to  AU14.
    No  GO to  AU13.

  13. AU13 CHECK THE BLOWER RESISTANCE

    • Disconnect: Passenger Seat 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 will result in false readings and lead to incorrect identification of components that are not faulty.

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

    1. GFD137479Courtesy of FORD MOTOR COMPANY

    Is the resistance between 4, 000 ohms and 10, 000 ohms? 

    Yes  REPAIR the affected circuit(s). CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. CONNECT passenger seat side airbag C3052. REPOWER the SRS. REFER to Supplemental Restraint System .
    No  INSTALL a new cushion TED. REFER to Seat Cushion Thermo-Electric Device . CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. CONNECT passenger seat side airbag C3052. REPOWER the SRS. REFER to Supplemental Restraint System .

  14. AU14 CHECK THE BLOWER SPEED CONTROL AND CIRCUIT

    • NOTE: The ohmmeter must be connected with the positive lead to C3265C-3 , circuit RHS08 (VT/WH), harness side and the negative lead to C3265C-7 , circuit CHS08 (BN/YE), harness side when measuring. Ohmmeter leads incorrectly connected will result in false readings and lead to incorrect identification of components that are not faulty.

      Measure the resistance between Front Seat Climate Control Module (SCME) C3265C-3 , circuit RHS08 (VT/WH) harness side and Front Seat Climate Control Module (SCME) C3265C-7 , circuit CHS08 (BN/YE), harness side.

    1. GFD137519Courtesy of FORD MOTOR COMPANY

    Is the resistance between 240K ohms and 400K ohms? 

    Yes  GO to  AU16.
    No  GO to  AU15.

  15. AU15 CHECK THE BLOWER SPEED CONTROL

    • Disconnect: Passenger Seat 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 will result in false readings and lead to incorrect identification of components that are not faulty.

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

    1. GFD137503Courtesy of FORD MOTOR COMPANY

    Is the resistance between 240K ohms and 400K ohms? 

    Yes  REPAIR the affected circuit(s). CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. CONNECT passenger seat side airbag C3052. REPOWER the SRS. REFER to Supplemental Restraint System .
    No  INSTALL a new cushion TED. REFER to Seat Cushion Thermo-Electric Device . CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. CONNECT passenger seat side airbag C3052. REPOWER the SRS. REFER to Supplemental Restraint System .

  16. AU16 CHECK THE THERMISTOR CIRCUIT FOR A SHORT TO VOLTAGE

    • Ignition OFF.
    • Disconnect: Passenger Seat Side Airbag C3052.
    • Disconnect: Front Seat Climate Control Module (SCME) C3265B.
    • 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.

      Connect the battery ground cable. Refer to Battery, Mounting and Cables .

    • Ignition ON.
    • Measure the voltage between Front Seat Climate Control Module (SCME) C3265B-2 , circuit VHS27 (WH/OG), harness side and ground.
    1. GFD137520Courtesy of FORD MOTOR COMPANY

    Is the voltage less than 0.5 volt? 

    Yes  GO to  AU17.
    No  REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. CONNECT passenger seat side airbag C3052. REPOWER the SRS. REFER to Supplemental Restraint System .

  17. AU17 CHECK THE THERMISTOR CIRCUIT FOR A SHORT TO GROUND

    • Ignition OFF.
    • Measure the resistance between Front Seat Climate Control Module (SCME) C3265B-2 , circuit VHS27 (WH/OG), harness side and ground.
    1. GFD137521Courtesy of FORD MOTOR COMPANY

    Is the resistance greater than 10, 000 volts? 

    Yes  GO to  AU18.
    No  REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. CONNECT passenger seat side airbag C3052. REPOWER the SRS. REFER to Supplemental Restraint System .

  18. AU18 CHECK THE THERMISTOR AND WIRING

    • Measure the resistance between Front Seat Climate Control Module (SCME) C3265B-2 , circuit VHS27 (WH/OG), harness side and Front Seat Climate Control Module (SCME) C3265B-3 , circuit RHS10 (BU/OG), harness side. Note the ambient temperature and refer 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
    1. GFD137484Courtesy of FORD MOTOR COMPANY

    Is the resistance within the limits indicated? 

    Yes  INSTALL a new Front Seat Climate Control Module (SCME). REFER to Dual Climate Controlled Seat Module (DCSM) . CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. CONNECT passenger seat side airbag C3052. REPOWER the SRS. REFER to Supplemental Restraint System .
    No  GO to  AU19.

  19. AU19 CHECK THE THERMISTOR

    • Disconnect: Passenger Seat Cushion TED C3040.
    • Measure the resistance between cushion TED pin 5 and pin 8, component side. Note the ambient temperature and refer 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
    1. GFD137475Courtesy of FORD MOTOR COMPANY

    Is the resistance within the limits indicated? 

    Yes  REPAIR the affected circuit(s). CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. CONNECT passenger seat side airbag C3052. REPOWER the SRS. REFER to Supplemental Restraint System .
    No  INSTALL a new cushion TED. REFER to Seat Cushion Thermo-Electric Device . CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. CONNECT passenger seat side airbag C3052. REPOWER the SRS. REFER to Supplemental Restraint System .

  20. AU20 CHECK THE TED INSTALLATION AND FOR A CRUSHED SEAT BACKREST

    • Ignition OFF.
    • Inspect the passenger 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 are there no signs of damage to the foam pad and manifold? 

    Yes  This indicates the concern is not the fault of the backrest components. GO to  AU21.
    No  CORRECTLY INSTALL the backrest TED or INSTALL a new seat backrest foam pad and/or climate controlled seat manifold. CONNECT the battery ground cable. REFER to Battery, Mounting and Cables . CLEAR the DTCs. REPEAT the self-test. REPOWER the SRS. REFER to Supplemental Restraint System .

  21. AU21 CHECK THE CUSHION TED CIRCUIT FOR A SHORT TO VOLTAGE

    • Disconnect: Front Seat Climate Control Module (SCME) C3265A.
    • NOTE: Do not connect the seat side airbag electrical connectors at this time.

      Position the front passenger seat in the vehicle and connect the seat-to-floor connectors.

    • Ignition ON.
    • Measure the voltage between Front Seat Climate Control Module (SCME) C3265A-B , circuit RHS07 (BU), harness side and ground.
    1. GFD137522Courtesy of FORD MOTOR COMPANY

    Is the voltage less than 0.5 volt? 

    Yes  GO to  AU22.
    No  REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. CONNECT passenger seat side airbag C3052. REPOWER the SRS. REFER to Supplemental Restraint System .

  22. AU22 CHECK THE CUSHION TED CIRCUIT FOR A SHORT TO GROUND

    • Ignition OFF.
    • Measure the resistance between Front Seat Climate Control Module (SCME) C3265A-A , circuit CHS07 (GY/BU), harness side and ground.
    1. GFD137523Courtesy of FORD MOTOR COMPANY

    Is the resistance greater than 10, 000 ohms? 

    Yes  GO to  AU23.
    No  REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. CONNECT passenger seat side airbag C3052. REPOWER the SRS. REFER to Supplemental Restraint System .

  23. AU23 CHECK RESISTANCE OF THE CUSHION TED AND WIRING

    • Measure the resistance between Front Seat Climate Control Module (SCME) C3265A-A circuit CHS07 (GY/BU), harness side and Front Seat Climate Control Module (SCME) C3265A-B , circuit RHS07 (BU), harness side.
    1. GFD137524Courtesy of FORD MOTOR COMPANY

    Is the resistance between 0.9 and 10 ohms? 

    Yes  GO to  AU25.
    No  GO to  AU24.

  24. AU24 CHECK RESISTANCE OF THE CUSHION TED

    • Disconnect: Passenger Seat Cushion TED C3040.
    • Measure the resistance between passenger seat cushion TED C3040 pin 1 and pin 3, component side.
    1. GFD137433Courtesy of FORD MOTOR COMPANY

    Is the resistance between 0.9 and 10 ohms? 

    Yes  REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. CONNECT passenger seat side airbag C3052. REPOWER the SRS. REFER to Supplemental Restraint System .
    No  INSTALL a new cushion TED. REFER to Seat Cushion Thermo-Electric Device . CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. CONNECT passenger seat side airbag C3052. REPOWER the SRS. REFER to Supplemental Restraint System .

  25. AU25 CHECK THE BLOWER AND SPEED CONTROL CIRCUITS FOR A SHORT TO VOLTAGE

    • Disconnect: Front Seat Climate Control Module (SCME) C3265C.
    • Ignition ON.
    • Measure the voltage between:
      • Front Seat Climate Control Module (SCME) C3265C-8 , circuit CHS14 (GN), harness side and ground.
      • Front Seat Climate Control Module (SCME) C3265C-4 , circuit CHS09 (GY), harness side and ground.
    1. GFD137525Courtesy of FORD MOTOR COMPANY

    Is voltage present on any circuit? 

    Yes  REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. CONNECT passenger seat side airbag C3052. REPOWER the SRS. REFER to Supplemental Restraint System .
    No  GO to  AU26.

  26. AU26 CHECK THE BLOWER AND SPEED CONTROL CIRCUITS FOR A SHORT TO GROUND

    • Ignition OFF.
    • Measure the resistance between:
      • Front Seat Climate Control Module (SCME) C3265C-8 , circuit CHS14 (GN), harness side and ground.
      • Front Seat Climate Control Module (SCME) C3265C-4 , circuit CHS09 (GY), harness side and ground.
    1. GFD137526Courtesy of FORD MOTOR COMPANY

    Are the resistances greater than 10, 000 ohms? 

    Yes  GO to  AU27.
    No  REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. CONNECT passenger seat side airbag C3052. REPOWER the SRS. REFER to Supplemental Restraint System .

  27. AU27 CHECK THE BLOWER AND WIRING

    • NOTE: The ohmmeter must be connected with the positive lead to Front Seat Climate Control Module (SCME) C3265C-8 , circuit CHS14 (GN) and the negative lead to Front Seat Climate Control Module (SCME) C3265C-7 , circuit CHS08 (BN/YE) when measuring. Ohmmeter leads incorrectly connected will result in false readings and lead to incorrect identification of components that are not faulty.

      Measure the resistance between Front Seat Climate Control Module (SCME) C3265C-8 , circuit CHS14 (GN), harness side and Front Seat Climate Control Module (SCME) C3265C-7 , circuit CHS08 (BN/YE), harness side.

    1. GFD137518Courtesy of FORD MOTOR COMPANY

    Is the resistance between 4, 000 ohms and 10, 000 ohms? 

    Yes  GO to  AU29.
    No  GO to  AU28.

  28. AU28 CHECK THE BLOWER RESISTANCE

    • Disconnect: Passenger Seat 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 will result in false readings and lead to incorrect identification of components that are not faulty.

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

    1. GFD137493Courtesy of FORD MOTOR COMPANY

    Is the resistance between 4, 000 ohms and 10, 000 ohms? 

    Yes  REPAIR the affected circuit(s). CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. CONNECT passenger seat side airbag C3052. REPOWER the SRS. REFER to Supplemental Restraint System .
    No  INSTALL a new backrest TED. REFER to Seat Backrest Thermo-Electric Device . CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. CONNECT passenger seat side airbag C3052. REPOWER the SRS. REFER to Supplemental Restraint System .

  29. AU29 CHECK THE BLOWER SPEED CONTROL AND CIRCUIT

    • NOTE: The ohmmeter must be connected with the positive lead to C3265C-4 , circuit CHS09 (GY), harness side and the negative lead to C3265C-7 , circuit CHS08 (BN/YE), harness side when measuring. Ohmmeter leads incorrectly connected will result in false readings and lead to incorrect identification of components that are not faulty.

      Measure the resistance between Front Seat Climate Control Module (SCME) C3265C-4 , circuit CHS09 (GY) harness side and Front Seat Climate Control Module (SCME) C3265C-7 , circuit CHS08 (BN/YE), harness side.

    1. GFD137527Courtesy of FORD MOTOR COMPANY

    Is the resistance between 240K ohms and 400K ohms? 

    Yes  GO to  AU31.
    No  GO to  AU30.

  30. AU30 CHECK THE BLOWER SPEED CONTROL

    • Disconnect: Passenger Seat 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 will result in false readings and lead to incorrect identification of components that are not faulty.

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

    1. GFD137494Courtesy of FORD MOTOR COMPANY

    Is the resistance between 240K ohms and 400K ohms? 

    Yes  REPAIR the affected circuit(s). CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. CONNECT passenger seat side airbag C3052. REPOWER the SRS. REFER to Supplemental Restraint System .
    No  INSTALL a new backrest TED. REFER to Seat Backrest Thermo-Electric Device . CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. CONNECT passenger seat side airbag C3052. REPOWER the SRS. REFER to Supplemental Restraint System .

  31. AU31 CHECK THE THERMISTOR CIRCUIT FOR A SHORT TO VOLTAGE

    • Ignition OFF.
    • Disconnect: Passenger Seat Side Airbag C3052.
    • Disconnect: Front Seat Climate Control Module (SCME) C3265B.
    • 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.

      Connect the battery ground cable. Refer to Battery, Mounting and Cables .

    • Ignition ON.
    • Measure the voltage between Front Seat Climate Control Module (SCME) C3265B-4 , circuit VHS36 (YE/BU), harness side and ground.
    1. GFD137528Courtesy of FORD MOTOR COMPANY

    Is the voltage less than 0.5 volt? 

    Yes  GO to  AU32.
    No  REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. CONNECT passenger seat side airbag C3052. REPOWER the SRS. REFER to Supplemental Restraint System .

  32. AU32 CHECK THE THERMISTOR CIRCUIT FOR A SHORT TO GROUND

    • Ignition OFF.
    • Measure the resistance between Front Seat Climate Control Module (SCME) C3265B-4 , circuit VHS36 (YE/BU), harness side and ground.
    1. GFD137529Courtesy of FORD MOTOR COMPANY

    Is the resistance greater than 10, 000 ohms? 

    Yes  GO to  AU33.
    No  REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. CONNECT passenger seat side airbag C3052. REPOWER the SRS. REFER to Supplemental Restraint System .

  33. AU33 CHECK THE THERMISTOR AND WIRING

    • Measure the resistance between Front Seat Climate Control Module (SCME) C3265B-4 , circuit VHS36 (YE/BU), harness side and Front Seat Climate Control Module (SCME) C3265B-5 , circuit RHS20 (GN/BU), harness side. Note the ambient temperature and refer 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
    1. GFD137489Courtesy of FORD MOTOR COMPANY

    Is the resistance within the limits indicated? 

    Yes  INSTALL a new Front Seat Climate Control Module (SCME). REFER to Dual Climate Controlled Seat Module (DCSM) . CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. CONNECT passenger seat side airbag C3052. REPOWER the SRS. REFER to Supplemental Restraint System .
    No  GO to  AU34.

  34. AU34 CHECK THE THERMISTOR

    • Disconnect: Passenger Seat Backrest TED C3039.
    • Measure the resistance between backrest TED pin 5 and pin 8, component side. Note the ambient temperature and refer 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
    1. GFD137490Courtesy of FORD MOTOR COMPANY

    Is the resistance within the limits indicated? 

    Yes  REPAIR the affected circuit(s). CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. CONNECT passenger seat side airbag C3052. REPOWER the SRS. REFER to Supplemental Restraint System .
    No  INSTALL a new backrest TED. REFER to Seat Backrest Thermo-Electric Device . CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. CONNECT passenger seat side airbag C3052. REPOWER the SRS. REFER to Supplemental Restraint System .
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