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Pinpoint Test U: DTC B19A2

WARNING: This page is about a different car, the 2012 Ford Pickup, 2012 Ford F550 Super Duty, 2012 Ford F450 Super Duty, and 2012 Ford Cab & Chassis. 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.
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.
  1. U1 CHECK THE PASSENGER BACKREST TED BLOWER SPEED CONTROL 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 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.
    • 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 C3265C.
    • Ignition ON.
    • Measure the voltage between C3265C-4, circuit VHS21 (BU/WH), harness side and ground.
      Fig 1: Measuring Voltage Between C3265C-4, Circuit VHS21 (BU/WH) Harnes Side And Ground
      G06076933Courtesy of FORD MOTOR CO.
    • Is any voltage present? 
    • Yes  : GO to U2.
    • No  : GO to  U3.
  2. U2 CHECK THE PASSENGER BACKREST TED BLOWER SPEED CONTROL CIRCUIT FOR A SHORT TO VOLTAGE 
    • Ignition OFF.
    • Disconnect: Passenger Backrest TED C3039.
    • Measure the voltage between DCSM C3265C-4, circuit VHS21 (BU/WH), harness side and ground.
      Fig 2: Measuring Voltage Between C3265C-4, Circuit VHS21 (BU/WH) Harnes Side And Ground
      G06076933Courtesy 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 U3.
  3. U3 CHECK THE PASSENGER BACKREST TED BLOWER SPEED CONTROL AND BLOWER OUTPUT CIRCUITS FOR A SHORT TOGETHER 
    • Ignition OFF.
    • Disconnect: Passenger Backrest TED C3039.
    • Measure the resistance between DCSM C3265C-4, circuit VHS21 (BU/WH), harness side and C3265C-8, circuit CHS08 (BN/YE), harness side.
      Fig 3: Measuring Resistance Between DCSM C3265C-4, Circuit VHS21 (BU/WH) And C3265C-8, Circuit CHS08 (BN/YE), Harness Side
      G06134416Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 10, 000 ohms? 
    • Yes  : GO to U4.
    • No  : REPAIR the circuits. 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 .

  4. U4 CHECK THE PASSENGER BACKREST TED RESISTANCE FOR AN INTERNAL SHORT 
    • Measure the resistance between passenger backrest TED C3039 pins 2 and 7, component side.
      Fig 4: Checking Cushion TED Resistance For Internal Short
      G06076931Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 2M ohms? 
    • Yes  : GO to U5.
    • 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 .

  5. U5 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 B19A2 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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