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Pinpoint Test Ah : DTC B19A1

WARNING: This page is about a different car, the 2017 Lincoln Navigator and 2017 Ford Expedition. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: When taking measurements at Front Seat Climate Control Module (SCME) 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 airbag warning indicator illuminates when the correct RCM fuse is removed and the ignition is ON.
NOTE: The SRS must be fully operational and free of faults before releasing the vehicle to the customer.

  1. AH1 CHECK THE CUSHION TED BLOWER SPEED CONTROL CIRCUIT FOR A SHORT TO VOLTAGE

    • Ignition OFF.
    • Disconnect: Passenger Seat Side Airbag C3052.
    • Disconnect: Front Seat Climate Control Module (SCME) C3265C.
    • 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 .

    • Ignition ON.
    • Measure the voltage between C3265C-3 , circuit RHS08 (VT/WH), harness side and ground.
    1. GFD137453Courtesy of FORD MOTOR COMPANY

    Is any voltage present? 

    Yes  GO to  AH2.
    No  GO to  AH3.

  2. AH2 CHECK THE CUSHION TED BLOWER SPEED CONTROL CIRCUIT FOR A SHORT TO VOLTAGE

    • Disconnect: Passenger Seat Cushion TED C3040.
    • Measure the voltage between Front Seat Climate Control Module (SCME) C3265C-3 , circuit RHS08 (VT/WH), harness side and ground.
    1. GFD137453Courtesy of FORD MOTOR COMPANY

    Is any voltage present? 

    Yes  REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. CONNECT passenger seat side airbag C3052. REPOWER the SRS. REFER to Supplemental Restraint System .
    No  GO to  AH3.

  3. AH3 CHECK CUSHION TED BLOWER SPEED CONTROL AND BLOWER OUTPUT CIRCUITS FOR A SHORT TOGETHER

    • Ignition OFF.
    • Disconnect: Passenger Seat Cushion TED C3040.
    • Measure the resistance between Front Seat Climate Control Module (SCME) C3265C-3 , circuit RHS08 (VT/WH), harness side and C3265C-8 , circuit CHS14 (GN), harness side.
    1. GFD137454Courtesy of FORD MOTOR COMPANY

    Is the resistance greater than 10, 000 ohms? 

    Yes  GO to  AH4.
    No  REPAIR the circuits. CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. CONNECT passenger seat side airbag C3052. REPOWER the SRS. REFER to Supplemental Restraint System .

  4. AH4 CHECK CUSHION TED RESISTANCE FOR AN INTERNAL SHORT

    • Measure the resistance between passenger seat cushion TED C3040 pin 2 and pin 7, component side.
    1. GFD137455Courtesy of FORD MOTOR COMPANY

    Is the resistance greater than 10, 000 ohms? 

    Yes  INSTALL a new Front Seat Climate Control Module (SCME). REFER to Dual Climate Controlled Seat Module (DCSM) . CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. CONNECT passenger seat side airbag C3052. 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 airbag C3052. REPOWER the SRS. REFER to Supplemental Restraint System .
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