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Pinpoint Test Aa: DTC B103B/B1111

WARNING: This page is about a different car, the 2014 Lincoln MKX and 2014 Ford Edge. 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 .
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. AA1 CHECK THE TED CIRCUITS FOR A SHORT TO GROUND 
    • Ignition OFF.
    • Depower the SRS  . Refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING .
    • Disconnect: Driver Seat Side Air Bag C328.
    • Disconnect: Passenger Seat Side Air Bag C327.
    • Disconnect: DCSM  C3036A.
    • 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  C3036A, harness side and ground using the following chart:
      DCSM Connector Circuit
      C3036A-G  CHS02 (YE/BU)
      C3036A-H  RHS02 (BU/OG)
      C3036A-J  CHS01 (GY/VT)
      C3036A-K  RHS01 (WH/VT)
      • Fig 1: Measuring Resistance Between DCSM (C3036A), Harness Side And Ground
      G06134380Courtesy of FORD MOTOR CO.

    Are the resistances greater than 10, 000 ohms? 

    • Yes  : GO to AA2  .
    • No  : If the resistances of C3036A-G  , circuit CHS02 (YE/BU) and/or C3036A-H  , circuit RHS02 (BU/OG) to ground were not  greater than 10, 000 ohms to ground, GO to  AA6.

      If resistances of C3036A-J  , circuit CHS01 (GY/VT) and/or C3036A-K  , circuit RHS01 (WH/VT) to ground were not  greater than 10, 000 ohms to ground, GO to  AA7.

  2. AA2 CHECK THE TED CIRCUITS FOR A SHORT TO VOLTAGE 
    • Ignition ON.
    • Measure the voltage between DCSM  C3036A, harness side and ground using the following chart:
      DCSM Connector Circuit
      C3036A-G  CHS02 (YE/BU)
      C3036A-H  RHS02 (BU/OG)
      C3036A-J  CHS01 (GY/VT)
      C3036A-K  RHS01 (WH/VT)
      • Fig 2: Measuring Voltage Between DCSM (C3036A), Harness Side And Ground
      G06134381Courtesy of FORD MOTOR CO.

    Is voltage present on any circuits? 

    • Yes  : If voltage is present at C3036A-G and/or C3036A-H, GO to  AA8.

      If voltage is present at C3036A-J and/or C3036A-K, GO to  AA9.

    • No  : GO to AA3  .
  3. AA3 CHECK THE TED RESISTANCE 
    • Ignition OFF.
    • NOTE: Make sure the Thermo-Electric Devices (TEDs) are at room temperature and there is no air blowing across the TEDs  . Do not handle a TED  when measuring resistance. These conditions can cause incorrect readings and lead to incorrect identification of components that are not faulty.

      Measure the resistance between:

      • DCSM C3036A-G  , circuit CHS02 (YE/BU), harness side and DCSM C3036A-H  , circuit RHS02 (BU/OG), harness side.
      • DCSM C3036A-J  , circuit CHS01 (GY/VT), harness side and C3036A-K  , circuit RHS01 (WH/VT), harness side and ground.
        Fig 3: Measuring Resistance Between DCSM (C3036A-G), Circuit CHS02 (YE/BU) And DCSM (C3036A-H), Circuit RHS02 (BU/OG)
        G06134382Courtesy of FORD MOTOR CO.

    Are the resistances between 0.9 and 10 ohms? 

    • Yes  : INSTALL a new DCSM  . REFER to DUAL CLIMATE CONTROLLED SEAT MODULE (DCSM) . CLEAR the DTCs. REPEAT the self-test.

      DISCONNECT the battery ground cable.

      CONNECT passenger seat side air bag module C327.

      CONNECT driver seat side air bag module C328.

      REPOWER the SRS  . REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

    • No  : If the resistance between DCSM C3036A-G  and C3036A-H  was not  between 0.9 and 10 ohms, GO to  AA5.

      If the resistance between DCSM C3036A-J  and C3036A-K  was not  between 0.9 and 10 ohms, GO to AA4  .

  4. AA4 CHECK THE RESISTANCE OF THE BACKREST TED 
    • Disconnect: Driver Backrest TED  C3322.
    • Measure the resistance between driver backrest TED  C3322 pin 1 and pin 3, component side.
      Fig 4: Measuring Resistance Between Driver Backrest TED (C3322) Pin 1 And Pin 3
      G09298864Courtesy of FORD MOTOR CO.

    Is the resistance between 0.9 and 10 ohms? 

    • Yes  : REPAIR the affected circuit. CLEAR the DTCs. REPEAT the self-test.

      DISCONNECT the battery ground cable.

      CONNECT passenger seat side air bag module C327.

      CONNECT driver seat side air bag module C328.

      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 air bag module C327.

      CONNECT driver seat side air bag module C328.

      REPOWER the SRS  . REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

  5. AA5 CHECK THE RESISTANCE OF THE CUSHION TED 
    • Disconnect: Driver Cushion TED  C3327.
    • Measure the resistance between driver cushion TED  C3327 pin 1 and pin 3, component side.
      Fig 5: Measuring Resistance Between Driver Cushion TED (C3327) Pin 1 And Pin 3
      G06076908Courtesy of FORD MOTOR CO.

    Is the resistance between 0.9 and 10 ohms? 

    • Yes  : REPAIR the affected circuit. CLEAR the DTCs. REPEAT the self-test.

      DISCONNECT the battery ground cable.

      CONNECT passenger seat side air bag module C327.

      CONNECT driver seat side air bag module C328.

      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 air bag module C327.

      CONNECT driver seat side air bag module C328.

      REPOWER the SRS  . REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

  6. AA6 CHECK THE CUSHION TED CIRCUITS FOR A SHORT TO GROUND 
    • Disconnect: Driver Cushion TED  C3327.
    • Measure the resistance between:
      • DCSM C3036A-G  , circuit CHS02 (YE/BU), harness side and ground.
      • DCSM C3036A-H  , circuit RHS02 (BU/OG), harness side and ground.
        Fig 6: Measuring Resistance Between DCSM (C3036A-G), Circuit CHS02 (YE/BU), Harness Side And Ground
        G06076970Courtesy of FORD MOTOR CO.

    Are the resistances greater than 10, 000 ohms? 

    • Yes  : 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 air bag module C327.

      CONNECT driver seat side air bag module C328.

      REPOWER the SRS  . REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

    • No  : REPAIR the affected circuit. CLEAR the DTCs. REPEAT the self-test.

      DISCONNECT the battery ground cable.

      CONNECT passenger seat side air bag module C327.

      CONNECT driver seat side air bag module C328.

      REPOWER the SRS  . REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

  7. AA7 CHECK THE BACKREST TED CIRCUITS FOR A SHORT TO GROUND 
    • Disconnect: Driver Backrest TED  C3322.
    • Measure the resistance between:
      • DCSM C3036A-J  , circuit CHS01 (GY/VT), harness side and ground.
      • DCSM C3036A-K  , circuit RHS01 (WH/VT), harness side and ground.
        Fig 7: Measuring Resistance Between DCSM (C3036A-J), Circuit CHS01 (GY/VT), Harness Side And Ground
        G06134386Courtesy of FORD MOTOR CO.

    Are the resistances greater than 10, 000 ohms? 

    • Yes  : 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 air bag module C327.

      CONNECT driver seat side air bag module C328.

      REPOWER the SRS  . REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

    • No  : REPAIR the affected circuit. CLEAR the DTCs. REPEAT the self-test.

      DISCONNECT the battery ground cable.

      CONNECT passenger seat side air bag module C327.

      CONNECT driver seat side air bag module C328.

      REPOWER the SRS  . REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

  8. AA8 CHECK THE CUSHION TED CIRCUITS FOR A SHORT TO VOLTAGE 
    • Ignition OFF.
    • Disconnect: Driver Cushion TED  C3327.
    • Ignition ON.
    • Measure the voltage between:
      • DCSM C3036A-G  , circuit CHS02 (YE/BU), harness side and ground.
      • DCSM C3036A-H  , circuit RHS02 (BU/OG), harness side and ground.
        Fig 8: Measuring Voltage Between DCSM (C3036A-G), Circuit CHS02 (YE/BU), Harness Side And Ground
        G06134387Courtesy of FORD MOTOR CO.

    Is voltage present on either circuit? 

    • Yes  : REPAIR the affected circuit. CLEAR the DTCs. REPEAT the self-test.

      DISCONNECT the battery ground cable.

      CONNECT passenger seat side air bag module C327.

      CONNECT driver seat side air bag module C328.

      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 air bag module C327.

      CONNECT driver seat side air bag module C328.

      REPOWER the SRS  . REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

  9. AA9 CHECK THE BACKREST TED CIRCUITS FOR A SHORT TO VOLTAGE 
    • Ignition OFF.
    • Disconnect: Driver Backrest TED  C3322.
    • Ignition ON.
    • Measure the voltage between:
      • DCSM C3036A-J  , circuit CHS01 (GY/VT), harness side and ground.
      • DCSM C3036A-K  , circuit RHS01 (WH/VT), harness side and ground.
        Fig 9: Measuring Voltage Between DCSM (C3036A-J), Circuit CHS01 (GY/VT), Harness Side And Ground
        G06134388Courtesy of FORD MOTOR CO.

    Is voltage present on either circuit? 

    • Yes  : REPAIR the affected circuit. CLEAR the DTCs. REPEAT the self-test.

      DISCONNECT the battery ground cable.

      CONNECT passenger seat side air bag module C327.

      CONNECT driver seat side air bag module C328.

      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 air bag module C327.

      CONNECT driver seat side air bag module C328.

      REPOWER the SRS  . REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

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