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Home >> Ford >> 2012 >> Explorer Base, 3.5 8, AWD, 6F50 >> Repair and Diagnosis >> External Pages >> Different car >> Section 66 (Seat System - Seats) >> Diagnosis And Testing >> Seating >> Pinpoint Tests >> Pinpoint Test AD: DTC B272A >> Pinpoint Test Ad: DTC B272A

Pinpoint Test Ad: DTC B272A

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: When taking measurements at Dual Climate Controlled Seat Module (DCSM) 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 air bag warning indicator illuminates when the correct Restraints Control Module (RCM) fuse is removed and the ignition is ON.
NOTE: The Supplemental Restraint System (SRS) must be fully operational and free of faults before releasing the vehicle to the customer.
  1. AD1 CHECK THE DCSM FOR ON-DEMAND DTCs 
    • Start the vehicle and set the passenger seat to HIGH heat.
    • Enter the following diagnostic mode on the scan tool: Self Test - DCSM.
    • Was DTC B272A retrieved on-demand during the self-test? 
    • Yes  : GO to AD2.
    • No  : GO to  AD5.
  2. AD2 CHECK THE PASSENGER SEAT CUSHION TED THERMISTOR CIRCUITS FOR A SHORT TO GROUND 
    • Ignition OFF.
    • Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering in the General Procedures portion of SUPPLEMENTAL RESTRAINT SYSTEM .
    • Disconnect: Passenger Seat Side Air Bag C339.
    • Disconnect: DCSM C3265B.
    • Disconnect: Passenger Seat Cushion TED C3040.
    • 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 .

    • Measure the resistance between:
      • DCSM C3265B-2, circuit VHS27 (WH/OG), harness side and ground.
      • DCSM C3265B-3, circuit RHS10 (BU/OG), harness side and ground.
        Fig 1: Checking Passenger Seat Cushion TED Thermistor Circuits For Short To Ground
        G06134447Courtesy of FORD MOTOR CO.
    • Are the resistances greater than 10, 000 ohms? 
    • Yes  : GO to AD3.
    • No  : REPAIR the circuit(s). CLEAR the DTCs. REPEAT the self-test.

      DISCONNECT the battery ground cable. CONNECT passenger seat side air bag module C339.

      REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

  3. AD3 CHECK THE PASSENGER SEAT CUSHION TED THERMISTOR AND WIRING 
    • Connect: Passenger Seat Cushion TED C3040.
    • 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 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
      Fig 2: 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  AD18.
    • No  : GO to AD4.
  4. AD4 CHECK THE PASSENGER SEAT CUSHION TED THERMISTOR 
    • Disconnect: Passenger Seat Cushion TED C3040.
    • Measure the resistance between passenger seat cushion TED C3040 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
      Fig 3: Measuring Resistance Between Passenger Seat Cushion TED C3040 Pin 5 And Pin 8
      G06076995Courtesy of FORD MOTOR CO.
    • Is the resistance within the limits indicated? 
    • Yes  : REPAIR circuit VHS27 (WH/OG) or RHS10 (BU/OG) for an open or high resistance. CLEAR the DTCs. REPEAT the self-test.

      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 seat cushion TED. REFER to SEAT CUSHION - FRONT, BUCKET SEAT . CLEAR the DTCs. REPEAT the self-test.

      DISCONNECT the battery ground cable. CONNECT passenger seat side air bag module C339. REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

  5. AD5 CONFIRM THE FAULT WHILE MONITORING THE DCSM SEAT BACK THERMAL ELECTRIC DEVICE TEMPERATURE (PBKTEMP) AND SEAT CUSHION THERMAL ELECTRIC DEVICE TEMPERATURE (PCSHTEMP) PIDs 
    • Set the passenger seat to OFF.
    • Enter the following diagnostic mode on the scan tool: Clear DTCs - DCSM.
    • Enter the following diagnostic mode on the scan tool: DataLogger - DCSM.
    • Monitor the DCSM PIDs PBKTEMP and PCSHTEMP.
    • NOTE: A crushed seat cushion foam pad or a crushed climate controlled seat manifold may be the cause of the fault making it necessary to occupy the seat to recreate and identify the fault.

      Attempt to recreate the fault. Start the vehicle and set the passenger seat to HIGH heat for at least 15 minutes while occupying the seat.

    • Do the PIDs increase incrementally (gradually) and stay within 15°C (27°F) of each other? 
    • Yes  : Fault not present at this time. Fault may have been set due to a past failure, incorrect use of the climate controlled seat system by repeated switching between heat and cool modes or due to excessive passenger compartment temperature. CLEAR the DTCs. REPEAT the self-test.
    • No  : If the PCSHTEMP PID increases incrementally and is greater than 15°C (27°F) of the PBKTEMP PID, GO to AD6.

      If the PCSHTEMP PID increases quickly (temperature "jumps" and does not increase incrementally) and is greater than 15°C (27°F) of the PBKTEMP PID, GO to  AD16.

  6. AD6 COMPARE OPERATION OF THE DRIVER AND PASSENGER SEATS 
    • With the engine running, set both front seats to HIGH cool.
    • Note the airflow exhausting from the passenger seat cushion TED and compare it to the airflow exhausting from the driver seat cushion TED.
    • Carry out a wiggle test of the wire harnesses between the DCSM and the passenger seat cushion TED while monitoring blower operation of the TED. The blower should operate consistently and not change speeds
    • Is the airflow exhausting from the passenger seat cushion TED comparable to the airflow exhausting from the driver seat cushion TED with no change in operation when carrying out the wiggle test? 
    • Yes  : GO to AD7.
    • No  : If the airflow exhausting from the passenger seat cushion TED is not comparable to the airflow exhausting from the driver seat cushion TED, GO to  AD8.

      If the passenger seat cushion TED blower operation changed while carrying out the wiggle test, IDENTIFY and REPAIR the wiring fault. CLEAR the DTCs. REPEAT the self-test.

  7. AD7 COMPARE OPERATION OF THE DRIVER AND PASSENGER SEATS WHILE OCCUPIED 
    • Note the airflow exhausting from the passenger seat cushion TED with the passenger seat occupied and compare it to the airflow exhausting from the driver seat cushion TED with the driver seat occupied.
    • Is the airflow exhausting from the passenger seat cushion TED comparable to the airflow exhausting from the driver seat cushion TED? 
    • Yes  : GO to  AD16.
    • No  : INSTALL a new passenger seat cushion foam pad and/or climate controlled seat manifold. CLEAR the DTCs. REPEAT the self-test.
  8. AD8 CHECK THE PASSENGER SEAT CUSHION BLOWER FOR AN OBSTRUCTION OR RESTRICTED FILTER 
    • Ignition OFF.
    • Inspect the blower of the passenger seat cushion TED assembly for an obstruction or for a restricted filter.
    • Is the blower obstructed or the filter restricted? 
    • Yes  : REMOVE the obstruction or INSTALL a new filter. CLEAR the DTCs. REPEAT the self-test.
    • No  : GO to AD9.
  9. AD9 CHECK THE PASSENGER SEAT CUSHION BLOWER SPEED CONTROL CIRCUIT FOR AN OPEN 
    • Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering in the General Procedures portion of SUPPLEMENTAL RESTRAINT SYSTEM .
    • Disconnect: Passenger Seat Side Air Bag C339.
    • Disconnect: DCSM C3265C.
    • Disconnect: Passenger Seat Cushion TED C3040.
    • 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 .

    • Measure the resistance between DCSM C3265C-3, circuit VHS23 (BN/BU), harness side and passenger seat cushion TED C3040-7, circuit VHS23 (BN/BU), harness side.
      Fig 4: Measuring Resistance Between DCSM C3265C-3 And Passenger Seat Cushion TED C3040-7, Circuit VHS23 (BN/BU)
      G06076954Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    • Yes  : GO to AD10.
    • No  : REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.

      DISCONNECT the battery ground cable. CONNECT passenger seat side air bag module C339. REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

  10. AD10 CHECK THE PASSENGER SEAT CUSHION BLOWER CIRCUIT FOR A SHORT TO VOLTAGE 
    • Ignition ON.
    • Measure the voltage between DCSM C3265C-7, circuit RHS08 (VT/WH), harness side and ground.
      Fig 5: Measuring Voltage Between DCSM C3265C-7, Circuit RHS08 (VT/WH) And Ground
      G07403010Courtesy of FORD MOTOR CO.
    • Is any voltage present? 
    • Yes  : REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.

      DISCONNECT the battery ground cable. CONNECT passenger seat side air bag module C339.

      REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

    • No  : GO to AD11.
  11. AD11 CHECK THE PASSENGER SEAT CUSHION BLOWER CIRCUIT FOR A SHORT TO GROUND 
    • Ignition OFF.
    • Measure the resistance between DCSM C3265C-8, circuit CHS08 (BN/YE), harness side and ground.
      Fig 6: Measuring Resistance Between DCSM C3265C-8, Circuit CHS08 (BN/YE) And Ground
      G06134407Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 10, 000 ohms? 
    • Yes  : GO to AD12.
    • No  : REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.

      DISCONNECT the battery ground cable. CONNECT passenger seat side air bag module C339. REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

  12. AD12 CHECK THE PASSENGER SEAT CUSHION BLOWER CIRCUITS FOR AN OPEN 
    • Measure the resistance between:
      • DCSM C3265C-8, circuit CHS08 (BN/YE), harness side and passenger seat cushion TED C3040-2, circuit CHS08 (BN/YE), harness side.
      • DCSM C3265C-7, circuit RHS08 (VT/WH), harness side and passenger seat cushion TED C3040-4, circuit RHS08 (VT/WH), harness side.
        Fig 7: Checking Passenger Seat Cushion Blower Circuits For Open
        G06173469Courtesy of FORD MOTOR CO.
    • Are the resistances less than 5 ohms? 
    • Yes  : GO to AD13.
    • No  : REPAIR the circuit(s). CLEAR the DTCs. REPEAT the self-test.

      DISCONNECT the battery ground cable. CONNECT passenger seat side air bag module C339. REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

  13. AD13 CHECK THE PASSENGER SEAT CUSHION BLOWER RESISTANCE 
    • 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 results in false readings and leads to incorrect identification of components that are not damaged.

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

      Fig 8: Measuring Resistance Between Passenger Seat Cushion TED C3040 Pin 2 And Pin 4
      G06077017Courtesy of FORD MOTOR CO.
    • Is the resistance between 4, 000 ohms and 10, 000 ohms? 
  14. AD14 CHECK THE PASSENGER SEAT CUSHION BLOWER SPEED CONTROL RESISTANCE 
    • 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 results in false readings and leads to incorrect identification of components that are not damaged.

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

      Fig 9: Measuring Resistance Between Passenger Seat Cushion TED C3040 Pin 7 And Pin 4
      G06076991Courtesy of FORD MOTOR CO.
    • Is the resistance between 240K ohms and 400K ohms? 
  15. AD15 CHECK THE PASSENGER SEAT CUSHION TED INSTALLATION AND FOR CRUSHED SEAT CUSHION 
    • Ignition OFF.
    • Remove the passenger seat. Refer to SEAT - FRONT, BUCKET SEAT .
    • Remove the passenger seat cushion cover. Refer to SEAT CUSHION - FRONT, BUCKET SEAT .
    • Inspect the passenger seat cushion for the following:
      • Is the passenger seat cushion TED correctly installed?
      • Is the passenger seat cushion seat cushion foam pad crushed or restricted?
      • Is the passenger seat cushion climate controlled seat manifold crushed or restricted?
    • Is the passenger seat cushion TED correctly installed and are there no signs of damage to the foam pad and manifold? 
    • Yes  : INSTALL the passenger seat cushion cover and seat and GO to  AD18.
    • No  : CORRECTLY install the passenger seat cushion TED or INSTALL a new passenger seat cushion 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.

      DISCONNECT the battery ground cable. CONNECT passenger seat side air bag module C339. REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

  16. AD16 CHECK THE PASSENGER SEAT CUSHION TED THERMISTOR AND WIRING 
    • Ignition OFF.
    • Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering in the General Procedures portion of SUPPLEMENTAL RESTRAINT SYSTEM .
    • Disconnect: Passenger Seat Side Air Bag C339.
    • Disconnect: DCSM 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 .

    • Measure the resistance between DCSM C3265B-2, circuit VHS27 (WH/OG), harness side and C3305B-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
      Fig 10: Measuring Resistance Between DCSM C3265B-2, Circuit VHS27 (WH/OG) And C3305B-3 Circuit RHS10 (BU/OG)
      G06173467Courtesy of FORD MOTOR CO.
    • Is the resistance within the limits indicated? 
    • Yes  : GO to  AD18.
    • No  : GO to AD17.
  17. AD17 CHECK THE PASSENGER SEAT CUSHION TED THERMISTOR 
    • Measure the resistance between passenger seat cushion TED C3040 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
      Fig 11: Measuring Resistance Between Passenger Seat Cushion TED C3040 Pin 5 And Pin 8
      G06076995Courtesy of FORD MOTOR CO.
    • Is the resistance within the limits indicated? 
    • Yes  : REPAIR circuit VHS27 (WH/OG) or RHS10 (BU/OG) for an open or high resistance. CLEAR the DTCs. REPEAT the self-test.

      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 TED. REFER to SEAT CUSHION - FRONT, BUCKET SEAT . CLEAR the DTCs. REPEAT the self-test.

      DISCONNECT the battery ground cable. CONNECT passenger seat side air bag module C339. REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

  18. AD18 CHECK THE PASSENGER SEAT CUSHION TED HEATING/COOLING CIRCUITRY CURRENT DRAW 
    • Connect: All DCSM, TED and Body Harness-to-Seat Harness Connectors.
    • NOTE: It may be necessary to open the seat wire harness conduit to allow placing the inductive current probe around the circuit as described in the following step. Care must be taken when opening up the wire harness so as not to damage any wiring or connectors. Do not damage any wiring or induce stress on any wiring or connectors. Close up the wire harness once repairs to the seat are complete.
      NOTE: Use a commercially available inductive current probe (such as Electronic Specialties Current Probe/Multimeter 685 or a Fluke I410 [used with a digital multimeter]) or the low current probe from the Vehicle Measurement Module available for use with Integrated Diagnostic System (IDS). If these are unavailable, the inductive current probe feature from a battery tester may be substituted.

      Place an inductive current probe around circuit CHS07 (GY/BU) near DCSM C3265A-A and monitor the current draw.

    • Start the vehicle and set the passenger seat to HIGH heat.
    • Is the current draw less than 11 amps? 
  19. AD19 CHECK RESISTANCE OF THE PASSENGER SEAT CUSHION TED AND WIRING 
    • Ignition OFF.
    • Disconnect: DCSM C3265A.
    • Measure the resistance between DCSM C3265A-A circuit CHS07 (GY/BU), harness side and C3265A-B, circuit RHS07 (BU), harness side.
      Fig 12: Measuring Resistance Between DCSM C3265A-A Circuit CHS07 (GY/BU) And C3265A-B, Circuit RHS07 (BU)
      G06134402Courtesy of FORD MOTOR CO.
    • Is the resistance between 0.9 and 10 ohms? 
    • Yes  : GO to  AD21.
    • No  : GO to AD20.
  20. AD20 CHECK THE RESISTANCE OF THE PASSENGER SEAT CUSHION TED 
    • Disconnect: Passenger Seat Cushion TED C3040.
    • Measure the resistance between passenger seat cushion TED C3040 pin 1 and pin 3, component side.
      Fig 13: Measuring Resistance Between Passenger Seat Cushion TED C3040 Pin 1 And Pin 3
      G06076908Courtesy of FORD MOTOR CO.
    • Is the resistance between 0.9 and 10 ohms? 
    • Yes  : REPAIR circuit CHS07 (GY/BU) or RHS07 (BU) for an open or high resistance. CLEAR the DTCs. REPEAT the self-test.

      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 seat cushion TED. REFER to SEAT CUSHION - FRONT, BUCKET SEAT . CLEAR the DTCs. REPEAT the self-test.

      DISCONNECT the battery ground cable. CONNECT passenger seat side air bag module C339. REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

  21. AD21 CHECK FOR CORRECT DCSM OPERATION 
    • Inspect the DCSM and passenger seat cushion TED harness and component side connectors and the body harness-to-seat harness connectors for:
      • corrosion
      • damaged pins
      • pushed-out pins
    • Connect: All DCSM, TED and Body Harness-to-Seat Harness Connectors.
    • Make sure the connectors are seated correctly.
    • Start the engine.
    • Set the passenger seat to OFF.
    • Enter the following diagnostic mode on the scan tool: Clear DTCs - DCSM.
    • Attempt to recreate the fault. With the engine still running set the passenger seat to HIGH heat for at least 15 minutes.
    • Is the concern still present? 
    • Yes  : INSTALL a new DCSM. REFER to DUAL CLIMATE CONTROLLED SEAT MODULE (DCSM) . REPEAT the self-test. TEST the system for normal operation.

      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.

      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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