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Pinpoint Test Al: DTC B2729

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: The air bag warning indicator illuminates when the correct Restraints Control Module (RCM) fuse is removed and the ignition is ON.
NOTE: The Supplemental Restraint System (SRS) must be fully operational and free of faults before releasing the vehicle to the customer.
  1. AL1 CHECK THE DCSM FOR ON-DEMAND DTCs 
    • Start the vehicle and set the driver seat to HIGH heat.
    • Enter the following diagnostic mode on the scan tool: Self Test - DCSM.
    • Was DTC B2729 retrieved on-demand during the self-test? 
    1. Yes  : GO to AL2  .
    2. No  : GO to  AL5.
  2. AL2 CHECK THE DRIVER SEAT CUSHION TED THERMISTOR CIRCUITS FOR A SHORT TO GROUND 
    • Ignition OFF.
    • Depower the SRS. Refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING article .
    • Disconnect: Driver Seat Side Air Bag C327 and Passenger Seat Side Air Bag C313.
    • Disconnect: DCSM C3305B.
    • Disconnect: Driver Seat Cushion TED C3300.
      • 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.
    • Measure the resistance between:
      • DCSM C3305B-7, circuit VHS26 (VT), harness side and ground.
      • DCSM C3305B-8, circuit RHS05 (YE/VT), harness side and ground.
      Fig 1: Measuring Resistance Between DCSM C3305B-7, Circuit VHS26 (VT), Harness Side And Ground
      G07788826Courtesy of FORD MOTOR CO.
    • Are the resistances greater than 10,000 ohms? 
    1. Yes  : GO to AL3  .
    2. No  : REPAIR the circuit(s). CLEAR the DTCs. REPEAT the self-test.

      DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C327 and passenger seat side air bag module C313.

      REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM -- FUSION, MILAN & MKZ article.

  3. AL3 CHECK THE DRIVER SEAT CUSHION TED THERMISTOR AND WIRING 
    • Connect: Driver Seat Cushion TED C3300.
    • Measure the resistance between DCSM C3305B-7, circuit VHS26 (VT), harness side and DCSM C3305B-8, circuit RHS05 (YE/VT), harness side. Note the ambient temperature and refer to the following table.
      TEMPERATURE RESISTANCE REFERENCE TABLE

      Temperature Resistance
      0-10°C (32-50°F) 2,782-1,663 ohms
      10-20°C (50-68°F) 1,837-1,140 ohms
      20-30°C (68-86°F) 1,260-806 ohms
      30-40°C (86-104°F) 893-570 ohms
      40-50°C (104-122°F) 630-428 ohms
      Fig 2: Measuring Resistance Between DCSM C3305B-7, Circuit VHS26 (VT) And DCSM C3305B-8, Circuit RHS05 (YE/VT)
      G07788827Courtesy of FORD MOTOR CO.
    • Is the resistance within the limits indicated? 
    1. Yes  : GO to  AL18.
    2. No  : GO to AL4  .
  4. AL4 CHECK THE DRIVER SEAT CUSHION TED THERMISTOR 
    • Disconnect: Driver Seat Cushion TED C3300.
    • Measure the resistance between driver seat cushion TED C3300 pin 5 and pin 8, component side. Note the ambient temperature and refer to the following table.
      TEMPERATURE RESISTANCE REFERENCE TABLE

      Temperature Resistance
      0-10°C (32-50°F) 2,782-1,663 ohms
      10-20°C (50-68°F) 1,837-1,140 ohms
      20-30°C (68-86°F) 1,260-806 ohms
      30-40°C (86-104°F) 893-570 ohms
      40-50°C (104-122°F) 630-428 ohms
      Fig 3: Measuring Resistance Between Driver Seat Cushion TED C3300 Pin 5 And Pin 8, Component Side
      G07788828Courtesy of FORD MOTOR CO.
    • Is the resistance within the limits indicated? 
    1. Yes  : REPAIR circuit VHS26 (VT) or RHS05 (YE/VT) for an open or high resistance. CLEAR the DTCs. REPEAT the self-test.

      DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C327 and passenger seat side air bag module C313.

      REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM -- FUSION, MILAN & MKZ article.

    2. No  : INSTALL a new driver seat cushion TED. REFER to SEAT CUSHION THERMO-ELECTRIC DEVICE  in this service information. CLEAR the DTCs. REPEAT the self-test.

      DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C327 and passenger seat side air bag module C313.

      REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM -- FUSION, MILAN & MKZ article.

  5. AL5 CONFIRM THE FAULT WHILE MONITORING THE DCSM SEAT BACK THERMAL ELECTRIC DEVICE TEMPERATURE (BK_TEMP) AND SEAT CUSHION THERMAL ELECTRIC DEVICE TEMPERATURE (CSHTEMP) PIDs 
    • Set the driver seat to OFF.
    • Enter the following diagnostic mode on the scan tool: Clear DTCs - DCSM.
    • Enter the following diagnostic mode on the scan tool: DataLogger - DCSM.
    • Monitor the DCSM PIDs BK_TEMP and CSHTEMP.
      • NOTE: A crushed seat cushion foam pad or a crushed climate controlled seat manifold may be the cause of the fault making it necessary to occupy the seat to recreate and identify the fault.
    • Attempt to recreate the fault. Start the vehicle and set the driver seat to HIGH heat for at least 15 minutes while occupying the seat.
    • Do the PIDs increase incrementally (gradually) and stay within 15°C (27°F) of each other? 
    1. Yes  : Fault not present at this time. Fault may have been set due to a past failure, incorrect use of the climate controlled seat system by repeated switching between heat and cool modes or due to excessive passenger compartment temperature. CLEAR the DTCs. REPEAT the self-test.
    2. No  : If the CSHTEMP PID increases incrementally and is greater than 15°C (27°F) of the BK_TEMP PID, GO to AL6  .

      If the CSHTEMP PID increases quickly (temperature "jumps" and does not increase incrementally) and is greater than 15°C (27°F) of the BK_TEMP PID, GO to  AL16.

  6. AL6 COMPARE OPERATION OF THE DRIVER AND PASSENGER SEATS 
    • With the engine running, set both front seats to HIGH cool.
    • Note the airflow exhausting from the driver seat cushion TED and compare it to the airflow exhausting from the passenger seat cushion TED.
    • Carry out a wiggle test of the wire harnesses between the DCSM and the driver seat cushion TED while monitoring blower operation of the TED. The blower should operate consistently and not change speeds
    • Is the airflow exhausting from the driver seat cushion TED comparable to the airflow exhausting from the passenger seat cushion TED with no change in operation when carrying out the wiggle test? 
    1. Yes  : GO to AL7  .
    2. No  : If the airflow exhausting from the driver seat cushion TED is not comparable to the airflow exhausting from the passenger seat cushion TED, GO to  AL8.

      If the driver seat cushion TED blower operation changed while carrying out the wiggle test, IDENTIFY and REPAIR the wiring fault. CLEAR the DTCs.

      REPEAT the self-test.

  7. AL7 COMPARE OPERATION OF THE DRIVER AND PASSENGER SEATS WHILE OCCUPIED 
    • Note the airflow exhausting from the driver seat cushion TED with the driver seat occupied and compare it to the airflow exhausting from the passenger seat cushion TED with the passenger seat occupied.
    • Is the airflow exhausting from the driver seat cushion TED comparable to the airflow exhausting from the passenger seat cushion TED? 
    1. Yes  : GO to  AL16.
    2. No  : INSTALL a new driver seat cushion foam pad and/or climate controlled seat manifold. CLEAR the DTCs. REPEAT the self-test.
  8. AL8 CHECK THE DRIVER SEAT CUSHION BLOWER FOR AN OBSTRUCTION OR RESTRICTED FILTER 
    • Ignition OFF.
    • Inspect the blower of the driver seat cushion TED assembly for an obstruction or for a restricted filter.
    • Is the blower obstructed or the filter restricted? 
    1. Yes  : REMOVE the obstruction or INSTALL a new filter. CLEAR the DTCs. REPEAT the self-test.
    2. No  : GO to AL9  .
  9. AL9 CHECK THE DRIVER SEAT CUSHION BLOWER SPEED CONTROL CIRCUIT FOR AN OPEN 
    • Depower the SRS. Refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING article .
    • Disconnect: Driver Seat Side Air Bag C327 and Passenger Seat Side Air Bag C313.
    • Disconnect: DCSM C3305C.
    • Disconnect: Driver Seat Cushion TED C3300.
      • 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.
    • Measure the resistance between DCSM C3305C-11, circuit VHS18 (BN/GN), harness side and driver seat cushion TED C3300-7, circuit VHS18 (BN/GN), harness side.
      Fig 4: Measuring Resistance Between DCSM C3305C-11, Circuit VHS18 (BN/GN) And Driver Seat Cushion TED C3300-7, Circuit VHS18 (BN/GN)
      G07788829Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    1. Yes  : GO to AL10  .
    2. No  : REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.

      DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C327 and passenger seat side air bag module C313.

      REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM -- FUSION, MILAN & MKZ article.

  10. AL10 CHECK THE DRIVER SEAT CUSHION BLOWER CIRCUIT FOR A SHORT TO VOLTAGE 
    • Ignition ON.
    • Measure the voltage between DCSM C3305C-15, circuit RHS03 (GY/OG), harness side and ground.
      Fig 5: Measuring Voltage Between DCSM C3305C-15, Circuit RHS03 (GY/OG), Harness Side And Ground
      G07788830Courtesy of FORD MOTOR CO.
    • Is any voltage present? 
    1. Yes  : REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.

      DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C327 and passenger seat side air bag module C313.

      REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM -- FUSION, MILAN & MKZ article.

    2. No  : GO to AL11  .
  11. AL11 CHECK THE DRIVER SEAT CUSHION BLOWER CIRCUIT FOR A SHORT TO GROUND 
    • Ignition OFF.
    • Measure the resistance between DCSM C3305C-16, circuit CHS03 (GN/BN), harness side and ground.
      Fig 6: Measuring Resistance Between DCSM C3305C-16, Circuit CHS03 (GN/BN), Harness Side And Ground
      G07788831Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 10,000 ohms? 
    1. Yes  : GO to AL12  .
    2. No  : REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.

      DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C327 and passenger seat side air bag module C313.

      REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM -- FUSION, MILAN & MKZ article.

  12. AL12 CHECK THE DRIVER SEAT CUSHION BLOWER CIRCUITS FOR AN OPEN 
    • Measure the resistance between:
      • DCSM C3305C-16, circuit CHS03 (GN/BN), harness side and driver seat cushion TED C3300-2, circuit CHS03 (GN/BN), harness side.
      • DCSM C3305C-15, circuit RHS03 (GY/OG), harness side and driver seat cushion TED C3300-4, circuit RHS03 (GY/OG), harness side.
      Fig 7: Measuring Resistance Between DCSM C3305C-16, Circuit CHS03 (GN/BN) And Driver Seat Cushion TED C3300-2, Circuit CHS03 (GN/BN)
      G07788832Courtesy of FORD MOTOR CO.
    • Are the resistances less than 5 ohms? 
    1. Yes  : GO to AL13  .
    2. No  : REPAIR the circuit(s). CLEAR the DTCs. REPEAT the self-test.

      DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C327 and passenger seat side air bag module C313.

      REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM -- FUSION, MILAN & MKZ article.

  13. AL13 CHECK THE DRIVER SEAT CUSHION BLOWER RESISTANCE 
      NOTE: The ohmmeter must be connected with the positive lead to pin 2 and the negative lead to pin 4 when measuring. Ohmmeter leads incorrectly connected results in false readings and leads to incorrect identification of components that are not damaged.
      Fig 8: Measuring Resistance Between Driver Seat Cushion TED C3300 Pin 2 And Pin 4, Component Side
      G07788833Courtesy of FORD MOTOR CO.
    • Measure the resistance between driver seat cushion TED C3300 pin 2 and pin 4, component side.
    • Is the resistance between 4,000 ohms and 10,000 ohms? 
    1. Yes  : GO to AL14  .
    2. No  : INSTALL a new driver seat cushion TED. REFER to SEAT CUSHION THERMO-ELECTRIC DEVICE  in this service information. CLEAR the DTCs. REPEAT the self-test.

      DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C327 and passenger seat side air bag module C313.

      REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM -- FUSION, MILAN & MKZ article.

  14. AL14 CHECK THE DRIVER SEAT CUSHION BLOWER SPEED CONTROL RESISTANCE 
      NOTE: The ohmmeter must be connected with the positive lead to pin 7 and the negative lead to pin 4 when measuring. Ohmmeter leads incorrectly connected results in false readings and leads to incorrect identification of components that are not damaged. Measure the resistance between driver seat cushion TED C3300 pin 7 and pin 4, component side.
      Fig 9: Measuring Resistance Between Driver Seat Cushion TED C3300 Pin 7 And Pin 4, Component Side
      G07788834Courtesy of FORD MOTOR CO.
    • Is the resistance between 240K ohms and 400K ohms? 
    1. Yes  : GO to AL15  .
    2. No  : INSTALL a new driver seat cushion TED. REFER to SEAT CUSHION THERMO-ELECTRIC DEVICE  in this service information. CLEAR the DTCs. REPEAT the self-test.

      DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C327 and passenger seat side air bag module C313.

      REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM -- FUSION, MILAN & MKZ article.

  15. AL15 CHECK THE DRIVER SEAT CUSHION TED INSTALLATION AND FOR CRUSHED SEAT CUSHION 
    • Ignition OFF.
    • Remove the driver seat. Refer to SEAT - FRONT  in this service information.
    • Remove the driver seat cushion cover. Refer to SEAT CUSHION COVER 
      • Front in this service information.
      • Inspect the driver seat cushion for the following:
      • Is the driver seat cushion TED correctly installed?
      • Is the driver seat cushion seat cushion foam pad crushed or restricted?
      • Is the driver seat cushion climate controlled seat manifold crushed or restricted?
    • Is the driver seat cushion TED correctly installed and are there no signs of damage to the foam pad and manifold? 
    1. Yes  : INSTALL the driver seat cushion cover and seat and GO to  AL18.
    2. No  : CORRECTLY install the driver seat cushion TED or INSTALL a new driver seat cushion foam pad and/or climate controlled seat manifold. CONNECT the battery ground cable. REFER to BATTERY, MOUNTING & CABLES -- FUSION, MILAN & MKZ article. CLEAR the DTCs. REPEAT the self-test.

      DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C327 and passenger seat side air bag module C313.

      REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM -- FUSION, MILAN & MKZ article.

  16. AL16 CHECK THE DRIVER SEAT CUSHION TED THERMISTOR AND WIRING 
    • Ignition OFF.
    • Depower the SRS. Refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING article .
    • Disconnect: Driver Seat Side Air Bag C327 and Passenger Seat Side Air Bag C313.
    • Disconnect: DCSM C3305B.
      • 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.
    • Measure the resistance between DCSM C3305B-7, circuit VHS26 (VT), harness side and C3305B-8 circuit RHS05 (YE/VT), harness side. Note the ambient temperature and refer to the following table.
      TEMPERATURE RESISTANCE REFERENCE TABLE

      Temperature Resistance
      0-10°C (32-50°F) 2,782-1,663 ohms
      10-20°C (50-68°F) 1,837-1,140 ohms
      20-30°C (68-86°F) 1,260-806 ohms
      30-40°C (86-104°F) 893-570 ohms
      40-50°C (104-122°F) 630-428 ohms
      Fig 10: Measuring Resistance Between DCSM C3305B-7, Circuit VHS26 (VT) And C3305B-8 Circuit RHS05 (YE/VT)
      G07788835Courtesy of FORD MOTOR CO.
    • Is the resistance within the limits indicated? 
    1. Yes  : GO to  AL18.
    2. No  : GO to AL17  .
  17. AL17 CHECK THE DRIVER SEAT CUSHION TED THERMISTOR 
    • Measure the resistance between driver seat cushion TED C3300 pin 5 and pin 8, component side. Note the ambient temperature and refer to the following table.
      TEMPERATURE RESISTANCE REFERENCE TABLE

      Temperature Resistance
      0-10°C (32-50°F) 2,782-1,663 ohms
      10-20°C (50-68°F) 1,837-1,140 ohms
      20-30°C (68-86°F) 1,260-806 ohms
      30-40°C (86-104°F) 893-570 ohms
      40-50°C (104-122°F) 630-428 ohms
      Fig 11: Measuring Resistance Between Driver Seat Cushion TED C3300 Pin 5 And Pin 8, Component Side
      G07788836Courtesy of FORD MOTOR CO.
    • Is the resistance within the limits indicated? 
    1. Yes  : REPAIR circuit VHS26 (VT) or RHS05 (YE/VT) for an open or high resistance. CLEAR the DTCs. REPEAT the self-test.

      DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C327 and passenger seat side air bag module C313.

      REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM -- FUSION, MILAN & MKZ article.

    2. No  : INSTALL a new TED. REFER to SEAT CUSHION THERMO-ELECTRIC DEVICE  in this service information. CLEAR the DTCs. REPEAT the self-test.

      DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C327 and passenger seat side air bag module C313.

      REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM -- FUSION, MILAN & MKZ article.

  18. AL18 CHECK THE DRIVER SEAT CUSHION TED HEATING/COOLING CIRCUITRY CURRENT DRAW 
    • Connect: All DCSM, TED and body harness-to-seat harness connectors.
      • NOTE: It may be necessary to open the seat wire harness conduit to allow placing the inductive current probe around the circuit as described in the following step. Care must be taken when opening up the wire harness so as not to damage any wiring or connectors. Do not damage any wiring or induce stress on any wiring or connectors. Close up the wire harness once repairs to the seat are complete.
      NOTE: Use a commercially available inductive current probe (such as Electronic Specialties Current Probe/Multimeter 685 or a Fluke I410 [used with a digital multimeter]) or the low current probe from the Vehicle Measurement Module available for use with Integrated Diagnostic System (IDS). If these are unavailable, the inductive current probe feature from a battery tester may be substituted.
    • Place an inductive current probe around circuit CHS02 (YE/BU) near DCSM C3305A-G and monitor the current draw.
    • Start the vehicle and set the driver seat to HIGH heat.
    • Is the current draw less than 11 amps? 
    1. Yes  : GO to AL19  .
    2. No  : INSTALL a new driver seat cushion TED. REFER to SEAT CUSHION THERMO-ELECTRIC DEVICE  in this service information. CLEAR the DTCs. REPEAT the self-test.

      DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C327 and passenger seat side air bag module C313.

      REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM -- FUSION, MILAN & MKZ article.

  19. AL19 CHECK RESISTANCE OF THE DRIVER SEAT CUSHION TED AND WIRING 
    • Ignition OFF.
    • Disconnect: DCSM C3305A.
    • Measure the resistance between DCSM C3305A-G circuit CHS02 (YE/BU), harness side and C3305A-H, circuit RHS02 (BU/OG), harness side.
      Fig 12: Measuring Resistance Between DCSM C3305A-G Circuit CHS02 (YE/BU) And C3305A-H, Circuit RHS02 (BU/OG)
      G07788837Courtesy of FORD MOTOR CO.
    • Is the resistance between 0.9 and 10 ohms? 
    1. Yes  : GO to  AL21.
    2. No  : GO to AL20  .
  20. AL20 CHECK THE RESISTANCE OF THE DRIVER SEAT CUSHION TED 
    • Disconnect: Driver Seat Cushion TED C3300.
    • Measure the resistance between driver seat cushion TED C3300 pin 1 and pin 3, component side.
      Fig 13: Measuring Resistance Between Driver Seat Cushion TED C3300 Pin 1 And Pin 3, Component Side
      G07788838Courtesy of FORD MOTOR CO.
    • Is the resistance between 0.9 and 10 ohms? 
    1. Yes  : REPAIR circuit CHS02 (YE/BU) or RHS02 (BU/OG) for an open or high resistance. CLEAR the DTCs. REPEAT the self-test.

      DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C327 and passenger seat side air bag module C313.

      REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM -- FUSION, MILAN & MKZ article.

    2. No  : INSTALL a new driver seat cushion TED. REFER to SEAT CUSHION THERMO-ELECTRIC DEVICE  in this service information. CLEAR the DTCs. REPEAT the self-test.

      DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C327 and passenger

      seat side air bag module C313.

      REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM -- FUSION, MILAN & MKZ article.

  21. AL21 CHECK FOR CORRECT DCSM OPERATION 
    • Inspect the DCSM and driver seat cushion TED harness and component side connectors and the body harness-to-seat harness connectors for:
      • corrosion
      • damaged pins
      • pushed-out pins
    • Connect: All DCSM, TED and Body Harness-to-Seat Harness Connectors.
    • Make sure the connectors are seated correctly.
    • Start the engine.
    • Set the driver seat to OFF.
    • Enter the following diagnostic mode on the scan tool: Clear DTCs - DCSM.
    • Attempt to recreate the fault. With the engine still running set the driver seat to HIGH heat for at least 15 minutes.
    • Is the concern still present? 
    1. Yes  : INSTALL a new DCSM. REFER to DUAL CLIMATE CONTROLLED SEAT MODULE (DCSM)  in this service information. REPEAT the self-test. TEST the system for normal operation.

      DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C327 and passenger seat side air bag module C313.

      REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM -- FUSION, MILAN & MKZ article.

    2. No  : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.

      DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C327 and passenger seat side air bag module C313.

      REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM -- FUSION, MILAN & MKZ article.

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