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Home >> Ford >> 2000 >> Contour SE, 2.0 3, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 540 (Seat System) >> Diagnosis And Testing >> Seats >> Pinpoint Tests >> Pinpoint Test L: DTC B2729 - Cushion Over-Temp Detected/DTC B2730 - Back Over-Temp Detected/DTC B2731 - Differential Temperature Fault - Passenger Seat >> Pinpoint Test L: DTC B2729- Cushion Over-Temp Detected/DTC B2730 - Back Over-Temp Detected/DTC B2731 - Differential Temperature Fault - Passenger Seat

Pinpoint Test L: DTC B2729- Cushion Over-Temp Detected/DTC B2730 - Back Over-Temp Detected/DTC B2731 - Differential Temperature Fault - Passenger Seat

WARNING: This page is about a different car, the 2004 Mercury Monterey and 2004 Ford Freestar. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: The presence of over-temp faults (DTCs B2729 and B2730) can be induced by incorrect operation of the climate controlled seat system after an initial HEAT setting has been attained. If a HEAT setting is repeatedly turned OFF and ON in an attempt to increase the seat temperature, an over-temp condition can result and the DTC(s) will be set.
  1. L1 CHECK THE SEAT CUSHION TED EXHAUST NOZZLE FOR WASTE AIRFLOW 
    WARNING: The restraint system diagnostic tool is for restraint system service only. Remove from vehicle prior to road use. Failure to remove could result in injury and possible violation of vehicle safety standards.
    NOTE: If a seat equipped with a seat mounted side air bag and/or a safety belt pretensioner (if equipped) system is being serviced, the supplemental restraint system (SRS) must be disabled. Refer to AIR BAG RESTRAINT SYSTEMS .
    NOTE: The air bag warning lamp illuminates when the RCM fuse is removed and the ignition switch is ON. This is normal operation and does not indicate a supplemental restraint system (SRS) fault.
    NOTE: The SRS must be fully operational and free of faults before releasing the vehicle to the customer.
    • Key in OFF position.
    • Disable the SRS. Refer to Supplemental Restraint System (SRS) Disabling and Activating in AIR BAG RESTRAINT SYSTEMS .
    • Disconnect: Passenger Safety Belt Buckle Pretensioner C303.
    • Connect: Restraint System Diagnostic Tool 501-097 to the Passenger Safety Belt Buckle Pretensioner C303.
    • Disconnect: Passenger Seat Side Air Bag C337 (Vehicles With Seat Side Air Bags Only).
    • Connect: Restraint System Diagnostic Tool 418-133 to the Passenger Seat Side Air Bag C337 (Vehicles With Seat Side Air Bags Only).
      • WARNING: Be sure that nobody is in the vehicle and that there is nothing blocking or set in front of any air bag module when the battery ground cable is connected.
    • Connect the battery ground cable.
    • Key in ON position.
    • Set both front seats to the LOW COOL (one LED illuminated) at the dual automatic temperature control (DATC) module.
    • Check for air exhausting from the seat cushion TED exhaust nozzle and compare it to the air exhausting from the opposite seat.
    • Is air exhausting from the seat cushion TED exhaust nozzle comparable to the air exhausting from the opposite seat? 

    Yes 

    GO to  L4

    No 

    GO to L2.

  2. L2 INSPECT THE SEAT CUSHION DUCTS 
    • Key in OFF position.
    • Inspect the seat cushion ducts for damaged, restricted, or disconnected ducts.
    • Are any duct(s) damaged, restricted, or disconnected? 

    Yes 

    REPAIR or INSTALL new duct(s) as needed. CLEAR the DTCs. REPEAT the self test.

    DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from the passenger safety belt buckle pretensioner C303. CONNECT passenger safety belt buckle pretensioner C303.

    For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from passenger seat side air bag C337. CONNECT passenger seat side air bag C337.

    ACTIVATE the supplemental restraint system (SRS). Refer to AIR BAG RESTRAINT SYSTEMS .

    No 

    GO to L3.

  3. L3 INSPECT THE SEAT CUSHION TED FOR CORRECT INSTALLATION 
    • Inspect the TED for correct installation to the seat cushion.
    • Is the seat cushion TED correctly installed? 

    Yes 

    REMOVE the seat and the seat cushion trim cover. INSPECT for a worn, damaged, or incorrectly installed foam wedge, cushion foam, or seat cushion trim cover. INSPECT for collapsed airflow channels in the seat cushion foam. REPAIR or INSTALL a new foam wedge, seat cushion foam, or seat cushion trim cover as needed. CLEAR the DTCs. REPEAT the self test.

    DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from the passenger safety belt buckle pretensioner C303. CONNECT passenger safety belt buckle pretensioner C303.

    For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from passenger seat side air bag C337. CONNECT passenger seat side air bag C337.

    ACTIVATE the supplemental restraint system (SRS). Refer to AIR BAG RESTRAINT SYSTEMS .

    No 

    INSTALL the seat cushion TED correctly. CLEAR the DTCs. REPEAT the self test.

    DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from the passenger safety belt buckle pretensioner C303. CONNECT passenger safety belt buckle pretensioner C303.

    For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from passenger seat side air bag C337. CONNECT passenger seat side air bag C337.

    ACTIVATE the supplemental restraint system (SRS). Refer to AIR BAG RESTRAINT SYSTEMS .

  4. L4 CHECK THE SEAT BACKREST TED EXHAUST NOZZLE FOR WASTE AIRFLOW 
    • Set both front seats to LOW COOL (one LED illuminated) at the dual automatic temperature control (DATC) module.
    • Check for air exhausting from the seat backrest TED exhaust nozzle and compare it to the air exhausting from the opposite seat.
    • Is air exhausting from the seat backrest TED exhaust nozzle comparable to the air exhausting from the opposite seat? 

    Yes 

    GO to  L7

    No 

    GO to L5.

  5. L5 INSPECT THE SEAT BACKREST DUCTS 
    • Inspect the seat backrest ducts for damaged, restricted, or disconnected ducts.
    • Are any duct(s) damaged, restricted, or disconnected? 

    Yes 

    REPAIR or INSTALL new duct(s) as needed. CLEAR the DTCs. REPEAT the self test.

    DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from the passenger safety belt buckle pretensioner C303. CONNECT passenger safety belt buckle pretensioner C303.

    For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from passenger seat side air bag C337. CONNECT passenger seat side air bag C337.

    ACTIVATE the supplemental restraint system (SRS). Refer to AIR BAG RESTRAINT SYSTEMS .

    No 

    GO to L6.

  6. L6 INSPECT THE SEAT BACKREST TED FOR CORRECT INSTALLATION 
    • Inspect the TED for correct installation to the seat cushion.
    • Is the seat backrest TED correctly installed?

    Yes 

    REMOVE the seat and the seat backrest trim cover. INSPECT for a worn, damaged, or incorrectly installed foam wedge, backrest foam, or seat backrest trim cover. INSPECT for collapsed airflow channels in the seat backrest foam. REPAIR or INSTALL a new foam wedge, seat backrest foam, or seat backrest trim cover as needed. CLEAR the DTCs. REPEAT the self test.

    DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from the passenger safety belt buckle pretensioner C303. CONNECT passenger safety belt buckle pretensioner C303.

    For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from passenger seat side air bag C337. CONNECT passenger seat side air bag C337.

    ACTIVATE the supplemental restraint system (SRS). Refer to AIR BAG RESTRAINT SYSTEMS .

    No 

    INSTALL the seat backrest TED correctly. CLEAR the DTCs. REPEAT the self test.

    DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from the passenger safety belt buckle pretensioner C303. CONNECT passenger safety belt buckle pretensioner C303.

    For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from passenger seat side air bag C337. CONNECT passenger seat side air bag C337.

    ACTIVATE the supplemental restraint system (SRS). Refer to AIR BAG RESTRAINT SYSTEMS .

  7. L7 CHECK THE SEAT CUSHION AND SEAT BACKREST TEMPERATURE PIDS 
    • Enter the following diagnostic mode on the diagnostic tool: CCSM Active Command Menu TED HEAT MODE.
      • NOTE: After the active command TED HEAT is commanded to the ON state, the climate controlled seat TED will operate for 15 seconds then turn off.
      NOTE: The CCSM is not the source of the fault if the active command mode is operational.
    • Monitor PIDs CSHTEMP and BKTEMP while commanding the TED HEAT active command ON.
    • Is either PID greater than 185° F (85° C)? 

    Yes 

    If PID CSHTEMP is greater than 185°F (85° C), GO to L8.

    If PIDBK TEMP is greater than 185°F (85° C), GO to  L17.

    No 

    GO to  L12.

  8. L8 CHECK THE SEAT CUSHION TED TEMPERATURE SENSOR CIRCUITS 1548 (DG/LG) AND 2073 (BK/YE) FOR A SHORT TO VOLTAGE 
    • Key in OFF position.
    • Disconnect: Passenger Seat Cushion TED C3040.
    • Disconnect: Passenger CCSM C3036b.
    • Key in ON position.
    • Measure the voltage between passenger seat cushion TED C3040-3, circuit 1548 (DG/LG), harness side and ground; and between passenger seat cushion TED C3040-2, circuit 2073 (BK/YE), harness side and ground.
      Fig 1: Checking The Seat Cushion TED Temperature Sensor Circuits 1548 (DG/LG) And 2073 (BK/YE) For A Short To Voltage
      G03246833Courtesy of FORD MOTOR CO.
    • Are the voltages less than 0.2 volt? 

    Yes 

    GO to L9

    No 

    REPAIR the affected circuits. CLEAR the DTCs. REPEAT the self test.

    DISCONNECT the battery ground cable.

    DISCONNECT the restraint system diagnostic tool from the passenger safety belt buckle pretensioner C303. CONNECT passenger safety belt buckle pretensioner C303.

    For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from passenger seat side air bag C337. CONNECT passenger seat side air bag C337.

    ACTIVATE the supplemental restraint system (SRS). Refer to AIR BAG RESTRAINT SYSTEMS .

  9. L9 CHECK THE SEAT CUSHION TED TEMPERATURE SENSOR CIRCUITS 1548 (DG/LG) AND 2073 (BK/YE) FOR A SHORT TO GROUND 
    • Key in OFF position.
    • Measure the resistance between passenger seat cushion TED C3040-3, circuit 1548 (DG/LG), harness side and ground; and between passenger seat cushion TED C3040-2, circuit 2073 (BK/YE), harness side and ground.
      Fig 2: Checking The Seat Cushion TED Temperature Sensor Circuits 1548 (DG/LG) And 2073 (BK/YE) For A Short To Ground
      G03246834Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 10,000 ohms? 

    Yes 

    GO to L10.

    No 

    REPAIR the affected circuit(s). CLEAR the DTCs. REPEAT the self test.

    DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from the passenger safety belt buckle pretensioner C303.

    CONNECT passenger safety belt buckle pretensioner C303.

    For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from passenger seat side air bag C337. CONNECT passenger seat side air bag C337.

    ACTIVATE the supplemental restrain system (SRS). Refer to AIR BAG RESTRAINT SYSTEMS .

  10. L10 CHECK THE SEAT CUSHION TED TEMPERATURE SENSOR CIRCUITS 1548 (DG/LG) AND 2073 (BK/YE) FOR AN OPEN 
    • Measure the resistance between passenger seat cushion TED C3040-3, circuit, harness side and passenger CCSM C3036b-18, circuit 1548 (DG/LG), harness side; and between passenger seat cushion TED C3040-2, circuit 2073 (BK/YE), harness side and passenger CCSM C3036b-17, circuit 2073 (BK/YE), harness side.
      Fig 3: Checking The Seat Cushion TED Temperature Sensor Circuits 1548 (DG/LG) And 2073 (BK/YE) For An Open
      G03246835Courtesy of FORD MOTOR CO.
    • Are the resistances less than 5 ohms? 

    Yes 

    GO to L11

    No 

    REPAIR the affected circuit. CLEAR the DTCs. REPEAT the self test. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from the passenger safety belt buckle pretensioner C303. CONNECT passenger safety belt buckle pretensioner C303.

    For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from passenger seat side air bag C337. CONNECT passenger seat side air bag C337.

    ACTIVATE the supplemental restraint system (SRS). Refer to AIR BAG RESTRAINT SYSTEMS .

  11. L11 CHECK THE SEAT CUSHION TEMPERATURE SENSOR 
    • Measure the resistance between the seat cushion TED pin 3 and pin 2, component side.
      Fig 4: Measuring Resistance Between Seat Cushion TED Pin 3 And Pin 2, Component Side
      G03246836Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 1,000 ohms? 

    Yes 

    INSTALL a new CCSM. CONFIGURE the CCSM. REFER to MODULE COMMUNICATIONS NETWORK . CLEAR the DTCs. REPEAT the self test.

    DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from the passenger safety belt buckle pretensioner C303. CONNECT passenger safety belt buckle pretensioner C303.

    For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from passenger seat side air bag C337. CONNECT passenger seat side air bag C337.

    ACTIVATE the supplemental restraint system (SRS). Refer to AIR BAG RESTRAINT SYSTEMS .

    No 

    INSTALL a new seat cushion TED. CLEAR the DTCs. REPEAT the self test.

    DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from the passenger safety belt buckle pretensioner C303. CONNECT passenger safety belt buckle pretensioner C303.

    For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from passenger seat side air bag C337. CONNECT passenger seat side air bag C337.

    ACTIVATE the supplemental restraint system (SRS). Refer to AIR BAG RESTRAINT SYSTEMS .

  12. L12 CHECK THE SEAT CUSHION AND SEAT BACKREST TEMPERATURE PIDS 
    • Enter the following diagnostic mode on the diagnostic tool: CCSM Active Command Menu TED HEAT MODE.
      • NOTE: After the active command TED HEAT is commanded to the ON state, the climate controlled seat TED will operate for 15 seconds then turn off.
      NOTE: The CCSM is not the source of the fault if the active command mode is operational.
    • Monitor PIDs CSHTEMP and BK_TEMP while commanding the TED HEAT active command ON.
    • Did the PID values change? 

    Yes 

    REPAIR the climate controlled seat for airflow leaks. INSPECT the fan, TEDs, ducts, foam wedges, foam pads, trim covers and their connection points and REPAIR as needed. CLEAR the DTCs. REPEAT the self test.

    DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from the passenger safety belt buckle pretensioner C303. CONNECT passenger safety belt buckle pretensioner C303.

    For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from passenger seat side air bag C337. CONNECT passenger seat side air bag C337.

    ACTIVATE the supplemental restraint system (SRS). Refer to AIR BAG RESTRAINT SYSTEMS .

    No 

    If PID CSHTEMP does not change, GO to L13. If PID BK_TEMP does not change, GO to  L21

  13. L13 CHECK THE SEAT CUSHION TED HEATING ELEMENT CIRCUITS 2072 (DG/YE) AND 2071 (DB/WH) FOR A SHORT TO VOLTAGE 
    • Key in OFF position.
    • Disconnect: Passenger Seat Cushion TED C3040.
    • Disconnect: Passenger CCSM C3036b. Key in ON position.
    • Measure the voltage between passenger seat cushion TED C3040-4, circuit 2072 (DG/YE), harness side and ground; and between passenger seat cushion TED C3040-6, circuit 2071 (DB/WH), harness side and ground.
      Fig 5: Checking The Seat Cushion TED Heating Element Circuits 2072 (DG/YE) And 2071 (DB/WH) For A Short To Voltage
      G03246837Courtesy of FORD MOTOR CO.
    • Are the voltages less than 0.2 volt? 

    Yes 

    GO to L14

    No 

    REPAIR the affected circuits. CLEAR the DTCs. REPEAT the self test. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from the passenger safety belt buckle pretensioner C303. CONNECT passenger safety belt buckle pretensioner C303.

    For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from passenger seat side air bag C337. CONNECT passenger seat side air bag C337.

    ACTIVATE the supplemental restraint system (SRS). Refer to AIR BAG RESTRAINT SYSTEMS .

  14. L14 CHECK THE SEAT CUSHION TED HEATING ELEMENT CIRCUITS 2072 (DG/YE) AND 2071 (DB/WH) FOR A SHORT TO GROUND 
    • Key in OFF position.
    • Measure the resistance between passenger seat cushion TED C3040-4, circuit 2072 (DG/YE), harness side and ground; and between passenger seat cushion TED C3040-6, circuit 2071 (DB/WH), harness side and ground.
      Fig 6: Checking The Seat Cushion TED Heating Element Circuits 2072 (DG/YE) And 2071 (DB/WH) For A Short To Ground
      G03246838Courtesy of FORD MOTOR CO.
    • Are the resistances greater than 10,000 ohms? 

    Yes 

    GO to L15

    No 

    REPAIR the affected circuit(s). CLEAR the DTCs. REPEAT the self test.

    DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from the passenger safety belt buckle pretensioner C303. CONNECT passenger safety belt buckle pretensioner C303.

    For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from passenger seat side air bag C337. CONNECT passenger seat side air bag C337.

    ACTIVATE the supplemental restraint system (SRS). Refer to AIR BAG RESTRAINT SYSTEMS .

  15. L15 CHECK THE SEAT CUSHION TED HEATING ELEMENT CIRCUITS 2072 (DG/YE) AND 2071 (DB/WH) FOR AN OPEN 
    • Measure the resistance between passenger seat cushion TED C3040-4, circuit 2072 (DG/YE), harness side and passenger CCSM C3036b-2, circuit 2072 (DG/YE), harness side; and between passenger seat cushion TED C3040-6, circuit 2071 (DB/WH), harness side and passenger CCSM C3036b-1, circuit 2071 (DB/WH), harness side.
      Fig 7: Checking The Seat Cushion TED Heating Element Circuits 2072 (DG/YE) And 2071 (DB/WH) For An Open
      G03246839Courtesy of FORD MOTOR CO.
    • Are the resistances less than 5 ohms? 

    Yes 

    GO to L16

    No 

    REPAIR the affected circuit. CLEAR the DTCs. REPEAT the self test. DISCONNECT the restraint system diagnostic tool from the passenger safety belt buckle pretensioner C303. CONNECT passenger safety belt buckle pretensioner C303.

    For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from passenger seat side air bag C337. CONNECT passenger seat side air bag C337.

    ACTIVATE the supplemental restraint system (SRS). Refer to AIR BAG RESTRAINT SYSTEMS .

  16. L16 CHECK THE SEAT CUSHION TED 
    • Measure the resistance between the seat cushion TED pin 4 and pin 6, component side.
      Fig 8: Measuring Resistance Between Seat Cushion TED Pin 4 And Pin 6, Component Side
      G03246840Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 1,000 ohms? 

    Yes 

    INSTALL a new CCSM. CONFIGURE the CCSM. Refer to MODULE COMMUNICATIONS NETWORK . CLEAR the DTCs. REPEAT the self test.

    DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from the passenger safety belt buckle pretensioner C303. CONNECT passenger safety belt buckle pretensioner C303.

    For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from passenger seat side air bag C337. CONNECT passenger seat side air bag C337.

    ACTIVATE the supplemental restraint system (SRS). Refer to AIR BAG RESTRAINT SYSTEMS .

    No 

    INSTALL a new seat cushion TED. CLEAR the DTCs. REPEAT the self test.

    DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from the passenger safety belt buckle pretensioner C303. CONNECT passenger safety belt buckle pretensioner C303.

    For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from passenger seat side air bag C337. CONNECT passenger seat side air bag C337.

    ACTIVATE the supplemental restraint system (SRS). Refer to AIR BAG RESTRAINT SYSTEMS .

  17. L17 CHECK THE SEAT BACKREST TED TEMPERATURE SENSOR CIRCUITS 1549 (DB/OG) AND 2076 (BK/PK) FOR A SHORT TO VOLTAGE 
    • Key in OFF position.
    • Disconnect: Passenger Seat Backrest TED C3039.
    • Disconnect: Passenger CCSM C3036b. Key in ON position.
    • Measure the voltage between passenger seat backrest TED C3039-3, circuit 1549 (DB/OG), harness side and ground; and between passenger seat backrest TED C3039-2, circuit 2076 (BK/PK), harness side and ground.
      Fig 9: Checking The Seat Backrest TED Temperature Sensor Circuits 1549 (DB/OG) AND 2076 (BK/PK) For A Short To Voltage
      G03246841Courtesy of FORD MOTOR CO.
    • Are the voltages less than 0.2 volt? 

    Yes 

    GO to L18

    No 

    REPAIR the affected circuits. CLEAR the DTCs. REPEAT the self test.

    DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from the passenger safety belt buckle pretensioner C303. CONNECT passenger safety belt buckle pretensioner C303.

    For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from passenger seat side air bag C337. CONNECT passenger seat side air bag C337.

    ACTIVATE the supplemental restraint system (SRS). Refer to AIR BAG RESTRAINT SYSTEMS .

  18. L18 CHECK THE SEAT BACKREST TED TEMPERATURE SENSOR CIRCUITS 1549 (DB/OG) AND 2076 (BK/PK) FOR A SHORT TO GROUND 
    • Measure the resistance between passenger seat backrest TED C3039-3, circuit 1549 (DB/OG), harness side and ground; and between passenger seat backrest TED C3039-2, circuit 2076 (BK/PK), harness side and ground.
      Fig 10: Checking The Seat Backrest TED Temperature Sensor Circuits 1549 (DB/OG) And 2076 (BK/PK) For A Short To Ground
      G03246842Courtesy of FORD MOTOR CO.
    • Are the resistances greater than 10,000 ohms? 

    Yes 

    GO to L19

    No 

    REPAIR the affected circuit(s). CLEAR the DTCs. REPEAT the self test.

    DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from the passenger safety belt buckle pretensioner C303. CONNECT passenger safety belt buckle pretensioner C303.

    For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from passenger seat side air bag C337. CONNECT passenger seat side air bag C337.

    ACTIVATE the supplemental restraint system (SRS). Refer to AIR BAG RESTRAINT SYSTEMS .

  19. L19 CHECK THE SEAT BACKREST TED TEMPERATURE SENSOR CIRCUITS 1549 (DB/OG) AND 2076 (BK/PK) FOR AN OPEN 
    • Measure the resistance between passenger seat backrest TED C3039-3, circuit 1549 (DB/OG), harness side and passenger CCSM C3036b-19, circuit 1549 (DB/OG), harness side; and between passenger seat backrest TED C3039-2, circuit 2076 (BK/PK), harness side and passenger CCSM C3036b-20, circuit 2076 (BK/PK), harness side.
      Fig 11: Checking The Seat Backrest TED Temperature Sensor Circuits 1549 (DB/OG) And 2076 (BK/PK) For An Open
      G03246843Courtesy of FORD MOTOR CO.
    • Are the resistances less than 5 ohms? 

    Yes 

    GO to L20

    No 

    REPAIR the affected circuit. CLEAR the DTCs. REPEAT the self test.

    DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from the passenger safety belt buckle pretensioner C303. CONNECT passenger safety belt buckle pretensioner C303.

    For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from passenger seat side air bag C337. CONNECT passenger seat side air bag C337.

    ACTIVATE the supplemental restraint system (SRS). Refer to AIR BAG RESTRAINT SYSTEMS .

  20. L20 CHECK THE SEAT BACKREST TEMPERATURE SENSOR 
    • Measure the resistance between the seat backrest TED pin 2 and pin 3, component side.
      Fig 12: Measuring Resistance Between Seat Backrest TED Pin 2 And Pin 3, Component Side
      G03246844Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 1,000 ohms? 

    Yes 

    INSTALL a new CCSM. CONFIGURE the CCSM. REFER to MODULE COMMUNICATIONS NETWORK . CLEAR the DTCs. REPEAT the self test.

    DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from the passenger safety belt buckle pretensioner C303. CONNECT passenger safety belt buckle pretensioner C303.

    For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from passenger seat side air bag C337. CONNECT passenger seat side air bag C337.

    ACTIVATE the supplemental restraint system (SRS). Refer to AIR BAG RESTRAINT SYSTEMS .

    No 

    INSTALL a new seat backrest TED. CLEAR the DTCs. REPEAT the self test.

    DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from the passenger safety belt buckle pretensioner C303. CONNECT passenger safety belt buckle pretensioner C303.

    For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from passenger seat side air bag C337. CONNECT passenger seat side air bag C337.

    ACTIVATE the supplemental restraint system (SRS). Refer to AIR BAG RESTRAINT SYSTEMS .

  21. L21 CHECK THE SEAT BACKREST TED HEATING ELEMENT CIRCUITS 2075 (WH/LB) AND 2074 (LB/BK) FOR A SHORT TO VOLTAGE 
    • Key in OFF position.
    • Disconnect: Passenger Seat Backrest TED C3039.
    • Disconnect: Passenger CCSM C3036b. Key in ON position.
    • Measure the voltage between passenger seat backrest TED C3039-4, circuit 2075 (WH/LB), harness side and ground; and between passenger seat backrest TED C3039-6, circuit 2074 (LB/BK), harness side and ground.
      Fig 13: Checking The Seat Backrest TED Heating Element Circuits 2075 (WH/LB) And 2074 (LB/BK) For A Short To Voltage
      G03246845Courtesy of FORD MOTOR CO.
    • Are the voltages less than 0.2 volt? 

    Yes 

    GO to L22

    No 

    REPAIR the affected circuits. CLEAR the DTCs. REPEAT the self test.

    DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from the passenger safety belt buckle pretensioner C303. CONNECT passenger safety belt buckle pretensioner C303.

    For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from passenger seat side air bag C337. CONNECT passenger seat side air bag C337.

    ACTIVATE the supplemental restraint system (SRS). Refer to AIR BAG RESTRAINT SYSTEMS .

  22. L22 CHECK THE SEAT BACKREST TED HEATING ELEMENT CIRCUITS 2075 (WH/LB) AND 2074 (LB/BK) FOR A SHORT TO GROUND 
    • Measure the resistance between passenger seat backrest TED C3039-4, circuit 2075 (WH/LB), harness side and ground; and between passenger seat backrest TED C3039-6, circuit 2074 (LB/BK), harness side and ground.
      Fig 14: Checking The Seat Backrest TED Heating Element Circuits 2075 (WH/LB) And 2074 (LB/BK) For A Short To Ground
      G03246846Courtesy of FORD MOTOR CO.
    • Are the resistances greater than 10,000 ohms? 

    Yes 

    GO to L23

    No 

    REPAIR the affected circuit(s). CLEAR the DTCs. REPEAT the self test.

    DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from the passenger safety belt buckle pretensioner C303.CONNECT passenger safety belt buckle pretensioner C303.

    For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from passenger seat side air bag C337. CONNECT passenger seat side air bag C337.

    ACTIVATE the supplemental restraint system (SRS). Refer to AIR BAG RESTRAINT SYSTEMS .

  23. L23 CHECK THE SEAT BACKREST TED HEATING ELEMENT CIRCUITS 2075 (WH/LB) AND 2074 (LB/BK) FOR AN OPEN 
    • Measure the resistance between passenger seat backrest TED C3039-4, circuit 2075 (WH/LB), harness side and passenger CCSM C3036b-12, circuit 2075 (WH/LB), harness side; and between passenger seat backrest TED C3039-6, circuit 2074 (LB/BK), harness side and passenger CCSM C3036b-11, circuit 2074 (LB/BK), harness side and ground.
      Fig 15: Checking The Seat Backrest TED Heating Element Circuits 2075 (WH/LB) And 2074 (LB/BK) For An Open
      G03246847Courtesy of FORD MOTOR CO.
    • Are the resistances less than 5 ohms? For vehicles with seat side 

    Yes 

    GO to L24

    No 

    REPAIR the affected circuit. CLEAR the DTCs. REPEAT the self test. DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from the passenger safety belt buckle pretensioner C303. CONNECT passenger safety belt buckle pretensioner C303.

    For vehicle with seat side air bags, DISCONNECT the restraint system diagnostic tool from passenger seat side air bag C337. CONNECT passenger seat side air bag C337.

    ACTIVATE the supplemental restraint system (SRS). Refer to AIR BAG RESTRAINT SYSTEMS .

  24. L24 CHECK THE SEAT BACKREST TED 
    • Measure the resistance between the seat backrest TED pin 4 and pin 6, component side.
      Fig 16: Measuring Resistance Between Seat Backrest TED Pin 4 And Pin 6, Component Side
      G03246848Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 1,000 ohms? 

    Yes 

    INSTALL a new CCSM. CONFIGURE the CCSM. Refer to MODULE COMMUNICATIONS NETWORK . CLEAR the DTCs. REPEAT the self test.

    DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from the passenger safety belt buckle pretensioner C303. CONNECT passenger safety belt buckle pretensioner C303.

    For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from passenger seat side air bag C337. CONNECT passenger seat side air bag C337.

    ACTIVATE the supplemental restraint system (SRS). Refer to AIR BAG RESTRAINT SYSTEMS .

    No 

    INSTALL a new seat backrest TED. CLEAR the DTCs. REPEAT the self test.

    DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from the passenger safety belt buckle pretensioner C303. CONNECT passenger safety belt buckle pretensioner C303.

    For vehicles with seat side air bags, DISCONNECT the restraint system diagnostic tool from passenger seat side air bag C337. CONNECT passenger seat side air bag C337.

    ACTIVATE the supplemental restraint system (SRS). Refer to AIR BAG RESTRAINT SYSTEMS .

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