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PINPOINT TEST W: DTCs B103B AND B1111

WARNING: This page is about a different car, the 2010 Mercury Milan, 2010 Lincoln MKZ, and 2010 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: The air bag warning indicator illuminates when the correct Restraints Control Module (RCM) fuse is removed and the ignition switch is ON.
NOTE: The Supplemental Restraint System (SRS) must be fully operational and free of faults before releasing the vehicle to the customer.
  1. W1 CHECK 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 C327.
    • Disconnect: Passenger Seat Side Air Bag Module C313.
    • Disconnect: DCSM  C3305a.
    • Measure the resistance between DCSM  C3305a, harness side and ground using the following table below:
      CONNECTOR REFERENCE TABLE

      Connector Circuit
      C3305a-G CHS02 (YE/BU)
      C3305a-H RHS02 (BU/OG)
      C3305a-J CHS01 (GY/VT)
      C3305a-K RHS01 (WH/VT)
      Fig 1: Measuring Resistance Between DCSM C3305A, Harness Side And Ground
      G06259313Courtesy of FORD MOTOR CO.
    • Are the resistances greater than 10,000 ohms? 
  1. W2 CHECK TED CIRCUITS FOR A SHORT TO VOLTAGE 
    • Connect the battery ground cable. Refer to BATTERY, MOUNTING AND CABLES .
      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.
    • Ignition ON.
    • Measure the voltage between DCSM  C3305a, harness side and ground using the following table below:
      CONNECTOR REFERENCE TABLE

      Connector Circuit
      C3305a-G CHS02 (YE/BU)
      C3305a-H RHS02 (BU/OG)
      C3305a-J CHS01 (GY/VT)
      C3305a-K RHS01 (WH/VT)
      Fig 2: Measuring Voltage Between DCSM C3305A, Harness Side And Ground
      G06259314Courtesy of FORD MOTOR CO.
    • Is voltage present on any circuits? 
  1. W3 CHECK THE RESISTANCE OF THE TED AND WIRING 
    • Ignition OFF.
    • Measure the resistance between:
      • DCSM  C3305a-G, circuit CHS02 (YE/BU), harness side and DCSM  C3305a-H, circuit RHS02 (BU/OG), harness side.
        • DCSM  C3305a-J, circuit CHS01 (GY/VT), harness side and C3305a-K, circuit RHS01 (WH/VT), harness side.
        Fig 3: Checking Resistance Of TED And Wiring
        G06259315Courtesy 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) . REPEAT the self-test. CLEAR the DTCs.

      DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C327. CONNECT passenger seat side air bag module C313. REPOWER the SRS  . REFER to GENERAL PROCEDURES

    • No  : If the resistance between DCSM  C3305a-G and C3305a-H is not  between 0.9 and 10 ohms, GO to  W5.

      If the resistance between DCSM  C3305a-J and C3305a-K is not  between 0.9 and 10 ohms, GO to  W4.

    1. W4 CHECK THE BACKREST TED RESISTANCE 
      • Disconnect: Backrest TED  C3310.
      • Measure the resistance between backrest TED  C3310 pin 1 and pin 3, component side.
        Fig 4: Measuring Resistance Between Backrest TED C3310 Pin 1 And Pin 3, Component Side
        G06259316Courtesy of FORD MOTOR CO.
      • Is the resistance between 0.9 and 10 ohms? 
    • Yes  : REPAIR the circuit(s). REPEAT the self-test. CLEAR the DTCs.

      DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C327. CONNECT passenger seat side air bag module C313. REPOWER the SRS  . REFER to GENERAL PROCEDURES

    • No  : INSTALL a new backrest TED  . REFER to SEAT BACKREST THERMO-ELECTRIC DEVICE . REPEAT the self-test. CLEAR the DTCs.

      DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C327. CONNECT passenger seat side air bag module C313. REPOWER the SRS  . REFER to GENERAL PROCEDURES

    1. W5 CHECK THE CUSHION TED RESISTANCE 
      • Disconnect: Cushion TED  C3300.
      • Measure the resistance between cushion TED  C3300 pin 1 and pin 3, component side.
        Fig 5: Measuring Resistance Between Cushion TED C3300 Pin 1 And Pin 3, Component Side
        G06259317Courtesy of FORD MOTOR CO.
      • Is the resistance between 0.9 and 10 ohms? 
    • Yes  : REPAIR the circuit(s). REPEAT the self-test. CLEAR the DTCs.

      DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C327. CONNECT passenger seat side air bag module C313. REPOWER the SRS  . REFER to GENERAL PROCEDURES

    • No  : INSTALL a new cushion TED  . REFER to SEAT CUSHION THERMO-ELECTRIC DEVICE . REPEAT the self-test. CLEAR the DTCs.

      DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C327. CONNECT passenger seat side air bag module C313. REPOWER the SRS  . REFER to GENERAL PROCEDURES

    1. W6 CHECK CUSHION TED CIRCUITS FOR A SHORT TO GROUND 
      • Disconnect: Cushion TED  C3300.
      • Measure the resistance between:
        • DCSM  C3305a-G, circuit CHS02 (YE/BU), harness side and ground.
        • DCSM  C3305a-H, circuit RHS02 (BU/OG), harness side and ground.
        Fig 6: Checking Cushion Ted Circuits For Short To Ground
        G06259318Courtesy 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 . REPEAT the self-test. CLEAR the DTCs.

      DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C327. CONNECT passenger seat side air bag module C313. REPOWER the SRS  . REFER to GENERAL PROCEDURES

    • No  : REPAIR the circuit(s). REPEAT the self-test. CLEAR the DTCs.

      DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C327. CONNECT passenger seat side air bag module C313. REPOWER the SRS  . REFER to GENERAL PROCEDURES

    1. W7 CHECK BACKREST TED CIRCUITS FOR A SHORT TO GROUND 
      • Disconnect: Backrest TED  C3310.
      • Measure the resistance between:
        • DCSM  C3305a-J, circuit CHS01 (GY/VT), harness side and ground.
        • DCSM  C3305a-K, circuit RHS01 (WH/VT), harness side and ground.
        Fig 7: Checking Backrest TED Circuits For Short To Ground
        G06259319Courtesy 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 . REPEAT the self-test. CLEAR the DTCs.

      DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C327. CONNECT passenger seat side air bag module C313. REPOWER the SRS  . REFER to GENERAL PROCEDURES

    • No  : REPAIR the circuit(s). REPEAT the self-test. CLEAR the DTCs.

      DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C327. CONNECT passenger seat side air bag module C313. REPOWER the SRS  . REFER to GENERAL PROCEDURES

    1. W8 CHECK CUSHION TED CIRCUITS FOR A SHORT TO VOLTAGE 
      • Disconnect: Cushion TED  C3300.
      • Ignition ON.
      • Measure the voltage between:
        • DCSM  C3305a-G, circuit CHS02 (YE/BU), harness side and ground.
        • DCSM  C3305a-H, circuit RHS02 (BU/OG), harness side and ground.
        Fig 8: Checking Cushion TED Circuits For Short To Voltage
        G06259320Courtesy of FORD MOTOR CO.
      • Is voltage present on either circuit? 
    • Yes  : REPAIR the circuit(s). REPEAT the self-test. CLEAR the DTCs.

      DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C327. CONNECT passenger seat side air bag module C313. REPOWER the SRS  . REFER to GENERAL PROCEDURES

    • No  : INSTALL a new cushion TED  . REFER to SEAT CUSHION THERMO-ELECTRIC DEVICE . REPEAT the self-test. CLEAR the DTCs.

      DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C327. CONNECT passenger seat side air bag module C313. REPOWER the SRS  . REFER to GENERAL PROCEDURES

    1. W9 CHECK BACKREST TED CIRCUITS FOR A SHORT TO VOLTAGE 
    • Disconnect: Backrest TED  C3310.
    • Ignition ON.
    • Measure the voltage between:
      • DCSM  C3305a-J, circuit CHS01 (GY/VT), harness side and ground.
      • DCSM  C3305a-K, circuit RHS01 (WH/VT), harness side and ground.
      Fig 9: Checking Backrest TED Circuits For Short To Voltage
      G06259321Courtesy of FORD MOTOR CO.
    • Is voltage present on either circuit? 
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