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Pinpoint Test Ar: DTC B272F

WARNING: This page is about a different car, the 2011 Mercury Milan, 2011 Lincoln MKZ, and 2011 Ford Fusion. 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: 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 -- FUSION, MILAN & MKZ article.
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.
  1. AR1 CHECK THE TED BLOWER MOTOR CIRCUITS FOR A SHORT TO VOLTAGE 
    • Ignition OFF.
    • Depower the SRS. Refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING article .
    • Disconnect: Passenger Seat Side Air Bag C313.
    • Disconnect: DCSM C3305C.
    • Disconnect: Cushion TED C3303.
    • Disconnect: Backrest TED C3311.
      • WARNING: Make sure no one is in the vehicle and there is nothing blocking or placed in front of any air bag module 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 & CABLES -- FUSION, MILAN & MKZ article.
    • Ignition ON.
    • Measure the voltage between DCSM C3305C, harness side and ground using the following table
      CONNECTOR REFERENCE TABLE

      DCSM Connector Circuit
      C3305C-8 CHS08 (BN/YE)
      C3305C-7 RHS08 (VT/WH)
      Fig 1: Measuring Voltage Between DCSM C3305C, Harness Side And Ground
      G07788924Courtesy of FORD MOTOR CO.
    • Is voltage present on either circuit? 
    1. Yes  : REPAIR the circuit(s). REPEAT the self-test. CLEAR the DTCs.

      DISCONNECT the battery ground cable. CONNECT passenger seat side air bag module C313.

      REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM -- FUSION, MILAN & MKZ article.

    2. No  : GO to AR2  .
  2. AR2 CHECK THE TED BLOWER MOTOR CIRCUITS FOR AN OPEN 
    • Ignition OFF.
    • Measure the resistance between DCSM C3305C, harness side and cushion TED C3300, harness side using the following table.
      CONNECTOR REFERENCE TABLE

      DCSM Connector Circuit Cushion TED Connector
      C3305C-8 CHS08 (BN/YE) C3303-2
      C3305C-7 RHS08 (VT/WH) C3303-4
      Fig 2: Measuring Resistance Between DCSM C3305C And Cushion TED C3300
      G07788925Courtesy of FORD MOTOR CO.
    • Are the resistances less than 5 ohms? 
    1. Yes  : GO to AR3  .
    2. No  : REPAIR the circuit(s). REPEAT the self-test. CLEAR the DTCs.

      DISCONNECT the battery ground cable. CONNECT passenger seat side air bag module C313. REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM -- FUSION, MILAN & MKZ article.

  3. AR3 CHECK THE RESISTANCE OF THE CUSHION AND BACKREST TED BLOWER MOTORS 
      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.
      Fig 3: Measuring Resistance Between Cushion TED C3303 Pins 2 And 4, Component Side
      G07788926Courtesy of FORD MOTOR CO.
    • Measure the resistance between:
      • cushion TED C3303 pins 2 and 4, component side.
      • backrest TED C3311 pins 2 and 4, component side.
    • Are the resistances between 4,000 and 10,000 ohms? 
    1. Yes  : INSTALL a new DCSM. REFER to DUAL CLIMATE CONTROLLED SEAT MODULE (DCSM)  in this service information. REPEAT the self-test. CLEAR the DTCs. DISCONNECT the battery ground cable. CONNECT passenger seat side air bag module C313. REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM -- FUSION, MILAN & MKZ article.
    2. No  : If the cushion TED resistance is not between 4,000 and 10,000 ohms, INSTALL a new cushion TED. REFER to SEAT CUSHION THERMO-ELECTRIC DEVICE  in this service information. REPEAT the self-test. CLEAR the DTCs. If backrest the TED resistance is not between 4,000 and 10,000 ohms, INSTALL a new backrest TED. REFER to SEAT BACKREST THERMO-ELECTRIC DEVICE  in this service information. REPEAT the self-test. CLEAR the DTCs. DISCONNECT the battery ground cable. CONNECT passenger seat side air bag module C313. REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM -- FUSION, MILAN & MKZ article.
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