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Pinpoint Test Ad: DTC B19A2

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. AD1 CHECK THE BACKREST TED BLOWER MOTOR SPEED CONTROL CIRCUIT 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.
      • 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 C3305C-4, circuit VHS21 (BU/WH), harness side and ground.
      Fig 1: Measuring Voltage Between C3305C-4, Circuit VHS21 (BU/WH), Harness Side And Ground
      G07788803Courtesy of FORD MOTOR CO.
    • Is any voltage present? 
    1. Yes  : GO to AD2  .
    2. No  : GO to  AD3.
  2. AD2 CHECK THE BACKREST TED BLOWER MOTOR SPEED CONTROL CIRCUIT FOR A SHORT TO VOLTAGE 
    • Disconnect: Backrest TED C3311.
    • Measure the voltage between DCSM C3305C-4, circuit VHS21 (BU/WH), harness side and ground.
      Fig 2: Measuring Voltage Between DCSM C3305C-4, Circuit VHS21 (BU/WH), Harness Side And Ground
      G07788804Courtesy of FORD MOTOR CO.
    • Is any voltage present? 
    1. Yes  : REPAIR the circuit. 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 AD3  .
  3. AD3 CHECK THE BACKREST TED BLOWER MOTOR SPEED CONTROL AND BLOWER MOTOR FEED CIRCUITS FOR A SHORT TOGETHER 
    • Ignition OFF.
    • Disconnect: Backrest TED C3311.
    • Measure the resistance between DCSM C3305C-4, circuit VHS21 (BU/WH), harness side and C3305C-8, circuit CHS08 (BN/YE), harness side.
      Fig 3: Measuring Resistance Between DCSM C3305C-4, Circuit VHS21 (BU/WH) And C3305C-8, Circuit CHS08 (BN/YE)
      G07788805Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 10,000 ohms? 
    1. Yes  : GO to AD4  .
    2. No  : REPAIR the circuits. 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.

  4. AD4 CHECK THE BACKREST TED RESISTANCE FOR AN INTERNAL SHORT 
    • Measure the resistance between backrest TED C3311 pin 2 and pin 7, component side.
      Fig 4: Measuring Resistance Between Backrest TED C3311 Pin 2 And Pin 7, Component Side
      G07788806Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 2,000,000 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  : 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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