Pinpoint Test Ar: DTC B272D

• Enter the following diagnostic mode on the scan tool: Self Test - DCSM  .

Was DTC B272A or B272B retrieved in the self-test? 

• Yes  : For DTC B272A, GO to PINPOINT TEST AO . For DTC B272B, GO to PINPOINT TEST AP .
• No  : GO to AR2  .

• Enter the following diagnostic mode on the scan tool: DataLogger - DCSM  PIDs.
  • Passenger cushion thermal electric device (TED) temperature (PCSHTMP)
  • Passenger back TED  temperature (PBKTMP)
  • Seat cushion thermal electric device temperature (CSHTEMP)
  • Seat back thermal electric device temperature (BK_TEMP)
• NOTE: Make sure the temperature of the climate controlled seats has stabilized before monitoring the PIDs. Not allowing stabilization can cause incorrect readings and lead to incorrect identification of components that are not faulty.

  Monitor the TED  temperature PIDs with the climate controlled seats off. Compare the PIDs of the front passenger seat to those of the driver seat, this can help identify if there is a concern with the front passenger seat cushion or backrest PID readings.

Are both front passenger seat TED temperature PIDs within 10°C (18°F) of the ambient temperature? 

• Yes  : GO to AR3  .
• No  : If the front passenger seat cushion PID varies 10°C (18°F) or more from ambient temperature, GO to  AR16.

  If the front passenger seat backrest PID varies 10°C (18°F) or more from ambient temperature, GO to  AR31.

• Ignition OFF.
• Ignition ON.
• NOTE: A crushed seat cushion foam pad or climate controlled seat manifold may be the cause of the fault. It may be necessary to sit on the seat or place something of reasonable size and weight on the seat to recreate the fault.
  NOTE: If the seat shuts down before a 15 minute heat cycle has timed out, carry out the DCSM  self-test and go to the DUAL CLIMATE CONTROLLED SEAT MODULE (DCSM) DTC CHART  to continue diagnostics.

  After cycling the ignition switch and with the engine running, set the driver seat to high heat. Allow the seat to heat for at least 15 minutes while monitoring the TED  temperature PIDs of the driver seat. If necessary, when the seat times out after 15 minutes, set the driver seat to high heat once again.

Do the driver seat cushion TED and backrest TED PIDs vary more than 60°C (108°F) from each other? 

• Yes  : If the front passenger seat cushion PID is 60°C (108°F) hotter than the backrest PID, GO to  AR5.

  If the front passenger seat backrest PID is 60°C (108°F) hotter than the cushion PID, GO to  AR20.

• No  : GO to AR4  .

• Check the TEDs  cooling performance on the passenger seat. Refer to COMPONENT TEST - THERMO-ELECTRIC DEVICE (TED) COOLING PERFORMANCE .

Did the TEDs pass the component test? 

• Yes  : The DTC may have been set by extreme cabin temperatures or excessive sun load on the seat causing the system to enter recovery mode. Occupant size and weight characteristics can also be a factor. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation. If a concern cannot be found or duplicated, RETURN the vehicle to the customer.
• No  : CHECK the affected seat cushion or backrest for correct installation of the climate controlled seat components (TED, manifold, air ducts and foam pad). CHECK for air flow restrictions (TED  inlets and outlets, TED  -to-manifold connections, filters and ducts) and REPAIR as needed. CHECK for an intermittent wiring fault. REPAIR as needed. CLEAR the DTCs. REPEAT the self-test.

• Ignition OFF.
• Depower the SRS  . Refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING .
• Remove the seat. Refer to SEAT - FRONT .
• Remove the seat cushion cover. Refer to SEAT CUSHION COVER - FRONT .
• Inspect the seat cushion for the following:
  • Is the cushion blower obstructed?
  • Is the blower filter restricted or plugged?
  • Is the TED  correctly installed?
  • Is the seat cushion foam pad crushed or restricted?
  • Is the climate controlled seat manifold crushed or restricted?

Is the TED correctly installed and are there no signs of damage to the foam pad and manifold? 

• Yes  : This indicates the concern is not the fault of the cushion components. GO to AR6  .
• No  : Correctly INSTALL the cushion TED  or INSTALL a new seat cushion foam pad and/or climate controlled seat manifold. CLEAR the DTCs. REPEAT the self-test.

  REPOWER the SRS  . REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

• Ignition OFF.
• Disconnect: DCSM  C3036A.
• NOTE: Do not connect the seat side air bag electrical connector at this time.

  Position the front passenger seat in the vehicle and connect the seat-to-floor connectors.

• 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 DCSM C3036A-D  , circuit RHS06 (WH), harness side and ground.
  Fig 1: Measuring Voltage Between DCSM (C3036A-D), Circuit RHS06 (WH), Harness Side And Ground

  Courtesy of FORD MOTOR CO.

Is any voltage present? 

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

  DISCONNECT the battery ground cable.

  CONNECT passenger seat side air bag module C327.

  REPOWER the SRS  . REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

• No  : GO to AR7  .

• Ignition OFF.
• Measure the resistance between DCSM C3036A-C  , circuit CHS06 (BU/BN), harness side and ground.
  Fig 2: Measuring Resistance Between DCSM (C3036A-C), Circuit CHS06 (BU/BN), Harness Side And Ground

  Courtesy of FORD MOTOR CO.

Is the resistance greater than 10, 000 ohms? 

• Yes  : GO to AR8  .
• No  : REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.

  DISCONNECT the battery ground cable.

  CONNECT passenger seat side air bag module C327.

  REPOWER the SRS  . REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

• Measure the resistance between DCSM C3036A-C  , circuit CHS06 (BU/BN), harness side and DCSM C3036A-D  , circuit RHS06 (WH), harness side.
  Fig 3: Measuring Resistance Between DCSM (C3036A-C), Circuit CHS06 (BU/BN) And DCSM (C3036A-D), Circuit RHS06 (WH)

  Courtesy of FORD MOTOR CO.

Is the resistance between 0.9 and 10 ohms? 

• Yes  : GO to  AR10.
• No  : GO to AR9  .

• Disconnect: Passenger Backrest TED  C3326.
• Measure the resistance between passenger backrest TED  C3326 pin 1 and pin 3, component side.
  Fig 4: Measuring Resistance Between Passenger Backrest TED (C3326) Pin 1 And Pin 3

  Courtesy of FORD MOTOR CO.

Is the resistance between 0.9 and 10 ohms? 

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

  DISCONNECT the battery ground cable.

  CONNECT passenger seat side air bag module C327.

  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.

  REPOWER the SRS  . REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

• Disconnect: DCSM  C3036C.
• Ignition ON.
• Measure the voltage between:
  • DCSM C3036C-8  , circuit CHS08 (BN/YE), harness side and ground.
  • DCSM C3036C-3  , circuit VHS23 (BN/BU), harness side and ground.
    Fig 5: Measuring Voltage Between DCSM (C3036C-8), Circuit CHS08 (BN/YE), Harness Side And Ground

    Courtesy of FORD MOTOR CO.

Is voltage present on either circuit? 

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

  DISCONNECT the battery ground cable.

  CONNECT passenger seat side air bag module C327.

  REPOWER the SRS  . REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

• No  : GO to AR11  .

• Ignition OFF.
• Measure the resistance between:
  • DCSM C3036C-8  , circuit CHS08 (BN/YE), harness side and ground.
  • DCSM C3036C-3  , circuit VHS23 (BN/BU), harness side and ground.
    Fig 6: Measuring Resistance Between DCSM (C3036C-8), Circuit CHS08 (BN/YE), Harness Side And Ground

    Courtesy of FORD MOTOR CO.

Are the resistances greater than 10, 000 ohms? 

• Yes  : GO to AR12  .
• No  : REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.

  DISCONNECT the battery ground cable.

  CONNECT passenger seat side air bag module C327.

  REPOWER the SRS  . REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

• NOTE: Connect the ohmmeter with the positive lead to Dual Climate Controlled Seat Module (DCSM) C3036C-8  , circuit CHS08 (BN/YE) and the negative lead to DCSM C3036C-7  , circuit RHS08 (VT/WH) when measuring. Ohmmeter leads incorrectly connected can result in false readings and leads to incorrect identification of components that are not faulty.

  Measure the resistance between DCSM C3036C-8  , circuit CHS08 (BN/YE), harness side and DCSM C3036C-7  , circuit RHS08 (VT/WH), harness side.

  Fig 7: Measuring Resistance Between DCSM (C3036C-8), Circuit CHS08 (BN/YE) And DCSM (C3036C-7), Circuit RHS08 (VT/WH)

  Courtesy of FORD MOTOR CO.

Is the resistance between 4, 000 ohms and 10, 000 ohms? 

• Yes  : GO to  AR14.
• No  : GO to AR13  .

• Disconnect: Passenger Cushion TED  C3328.
• NOTE: Connect the ohmmeter with the positive lead to pin 2 and the negative lead to pin 4 when measuring. Ohmmeter leads incorrectly connected can result in false readings and lead to incorrect identification of components that are not faulty.

  Measure the resistance between passenger cushion TED  C3328 pin 2 and pin 4, component side.

  Fig 8: Measuring Resistance Between Passenger Cushion TED (C3328) Pin 2 And Pin 4

  Courtesy of FORD MOTOR CO.

Is the resistance between 4, 000 ohms and 10, 000 ohms? 

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

  DISCONNECT the battery ground cable.

  CONNECT passenger seat side air bag module C327.

  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.

  REPOWER the SRS  . REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

• NOTE: Connect the ohmmeter with the positive lead to C3036C-3  , circuit VHS23 (BN/BU), harness side and the negative lead to C3036C-7  , circuit RHS08 (VT/WH), harness side when measuring. Ohmmeter leads incorrectly connected can result in false readings and leads to incorrect identification of components that are not faulty.

  Measure the resistance between DCSM C3036C-3  , circuit VHS23 (BN/BU), harness side and DCSM C3036C-7  , circuit RHS08 (VT/WH), harness side.

  Fig 9: Measuring Resistance Between DCSM (C3036C-3), Circuit VHS23 (BN/BU) And DCSM (C3036C-7), Circuit RHS08 (VT/WH)

  Courtesy of FORD MOTOR CO.

Is the resistance between 240, 000 ohms and 420, 000 ohms? 

• Yes  : GO to  AR16.
• No  : GO to AR15  .

• Disconnect: Passenger Cushion TED  C3328.
• 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 can result in false readings and lead to incorrect identification of components that are not faulty.

  Measure the resistance between passenger cushion TED  C3328 pin 7 and pin 4, component side.

  Fig 10: Measuring Resistance Between Passenger Cushion TED (C3328) Pin 7 And Pin 4

  Courtesy of FORD MOTOR CO.

Is the resistance between 240, 000 ohms and 420, 000 ohms? 

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

  DISCONNECT the battery ground cable.

  CONNECT passenger seat side air bag module C327.

  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.

  REPOWER the SRS  . REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

• Ignition OFF.
• Depower the SRS  . Refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING .
• Disconnect: Passenger Seat Side Air Bag C327.
• Disconnect: DCSM  C3036B.
• 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 DCSM C3036B-2  , circuit VHS27 (WH/OG), harness side and ground.
  Fig 11: Measuring Voltage Between DCSM (C3036B-2), Circuit VHS27 (WH/OG), Harness Side And Ground

  Courtesy of FORD MOTOR CO.

Is any voltage present? 

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

  DISCONNECT the battery ground cable.

  CONNECT passenger seat side air bag module C327.

  REPOWER the SRS  . REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

• No  : GO to AR17  .

• Ignition OFF.
• Measure the resistance between DCSM C3036B-2  , circuit VHS27 (WH/OG), harness side and ground.
  Fig 12: Measuring Resistance Between DCSM (C3036B-2), Circuit VHS27 (WH/OG), Harness Side And Ground

  Courtesy of FORD MOTOR CO.

Is the resistance greater than 10, 000 ohms? 

• Yes  : GO to AR18  .
• No  : REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.

  DISCONNECT the battery ground cable.

  CONNECT passenger seat side air bag module C327.

  REPOWER the SRS  . REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

• Measure the resistance between DCSM C3036B-2  , circuit VHS27 (WH/OG), harness side and DCSM C3036B-3  , circuit RHS10 (BU/OG), harness side. Note the ambient temperature and refer to the following chart.

  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 13: Measuring Resistance Between DCSM (C3036B-2), Circuit VHS27 (WH/OG) And DCSM (C3036B-3), Circuit RHS10 (BU/OG)
Courtesy of FORD MOTOR CO.

Is the resistance within the limits indicated? 

• 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 passenger seat side air bag module C327.

  REPOWER the SRS  . REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

• No  : GO to AR19  .

• Disconnect: Passenger Cushion TED  C3328.
• Measure the resistance between passenger cushion TED  pin 5 and pin 8, component side. Note the ambient temperature and refer to the following chart.

  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 14: Measuring Resistance Between Passenger Cushion TED Pin 5 And Pin 8
Courtesy of FORD MOTOR CO.

Is the resistance within the limits indicated? 

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

  DISCONNECT the battery ground cable.

  CONNECT passenger seat side air bag module C327.

  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.

  REPOWER the SRS  . REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

• Ignition OFF.
• Depower the SRS  . Refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING .
• Remove the seat. Refer to SEAT - FRONT .
• Remove the seat backrest cover. Refer to SEAT BACKREST COVER - FRONT, WITHOUT FOLD FLAT .
• Inspect the seat backrest for the following:
  • Is the backrest blower obstructed?
  • Is the blower filter restricted or plugged?
  • Is the TED  correctly installed?
  • Is the seat backrest foam pad crushed or restricted?
  • Is the climate controlled seat manifold crushed or restricted?

Is the TED correctly installed and are there no signs of damage to the foam pad and manifold? 

• Yes  : This indicates the concern is not the fault of the backrest components. GO to AR21  .
• No  : Correctly INSTALL the backrest TED  or INSTALL a new seat backrest foam pad and/or climate controlled seat manifold. CONNECT the battery ground cable.

  REPEAT the self-test. CLEAR the DTCs.

  REPOWER the SRS  . REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

• Ignition OFF.
• Disconnect: DCSM  C3036A.
• NOTE: Do not connect the seat side air bag electrical connector at this time.

  Position the front passenger seat in the vehicle and connect the seat-to-floor connectors.

• 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 DCSM C3036A-B  , circuit RHS07 (BU), harness side and ground.
  Fig 15: Measuring Voltage Between DCSM (C3036A-B), Circuit RHS07 (BU), Harness Side And Ground

  Courtesy of FORD MOTOR CO.

Is any voltage present? 

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

  DISCONNECT the battery ground cable.

  CONNECT passenger seat side air bag module C327.

  REPOWER the SRS  . REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

• No  : GO to AR22  .

• Ignition OFF.
• Measure the resistance between DCSM C3036A-A  , circuit CHS07 (GY/BU), harness side and ground.
  Fig 16: Measuring Resistance Between DCSM (C3036A-A), Circuit CHS07 (GY/BU), Harness Side And Ground

  Courtesy of FORD MOTOR CO.

Is the resistance greater than 10, 000 ohms? 

• Yes  : GO to AR23  .
• No  : REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.

  DISCONNECT the battery ground cable.

  CONNECT passenger seat side air bag module C327.

  REPOWER the SRS  . REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

• Measure the resistance between DCSM C3036A-A  circuit CHS07 (GY/BU), harness side and DCSM C3036A-B  , circuit RHS07 (BU), harness side.
  Fig 17: Measuring Resistance Between DCSM (C3036A-A) Circuit CHS07 (GY/BU) And DCSM (C3036A-B), Circuit RHS07 (BU)

  Courtesy of FORD MOTOR CO.

Is the resistance between 0.9 and 10 ohms? 

• Yes  : GO to  AR25.
• No  : GO to AR24  .

• Disconnect: Passenger Cushion TED  C3328.
• Measure the resistance between passenger cushion TED  C3328 pin 1 and pin 3, component side.
  Fig 18: Measuring Resistance Between Passenger Cushion TED (C3328) Pin 1 And Pin 3

  Courtesy of FORD MOTOR CO.

Is the resistance between 0.9 and 10 ohms? 

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

  DISCONNECT the battery ground cable.

  CONNECT passenger seat side air bag module C327.

  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.

  REPOWER the SRS  . REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

• Disconnect: DCSM  C3036C.
• Ignition ON.
• Measure the voltage between:
  • DCSM C3036C-8  , circuit CHS08 (BN/YE), harness side and ground.
  • DCSM C3036C-4  , circuit VHS21 (BU/WH), harness side and ground.
    Fig 19: Measuring Voltage Between DCSM (C3036C-8), Circuit CHS08 (BN/YE), Harness Side And Ground

    Courtesy of FORD MOTOR CO.

Is voltage present on either circuit? 

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

  DISCONNECT the battery ground cable.

  CONNECT passenger seat side air bag module C327.

  REPOWER the SRS  . REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

• No  : GO to AR26  .

• Ignition OFF.
• Measure the resistance between:
  • DCSM C3036C-8  , circuit CHS08 (BN/YE), harness side and ground.
  • DCSM C3036C-4  , circuit VHS21 (BU/WH), harness side and ground.
    Fig 20: Measuring Resistance Between DCSM (C3036C-8), Circuit CHS08 (BN/YE), Harness Side And Ground

    Courtesy of FORD MOTOR CO.

Are the resistances greater than 10, 000 ohms? 

• Yes  : GO to AR27  .
• No  : REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.

  DISCONNECT the battery ground cable.

  CONNECT passenger seat side air bag module C327.

  REPOWER the SRS  . REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

• NOTE: Connect the ohmmeter with the positive lead to Dual Climate Controlled Seat Module (DCSM) C3036C-8  , circuit CHS08 (BN/YE) and the negative lead to DCSM C3036C-7  , circuit RHS08 (VT/WH) when measuring. Ohmmeter leads incorrectly connected can result in false readings and lead to incorrect identification of components that are not faulty.

  Measure the resistance between DCSM C3036C-8  , circuit CHS08 (BN/YE), harness side and DCSM C3036C-7  , circuit RHS08 (VT/WH), harness side.

  Fig 21: Measuring Resistance Between DCSM (C3036C-8), Circuit CHS08 (BN/YE) And DCSM (C3036C-7), Circuit RHS08 (VT/WH)

  Courtesy of FORD MOTOR CO.

Is the resistance between 4, 000 ohms and 10, 000 ohms? 

• Yes  : GO to  AR29.
• No  : GO to AR28  .

• Disconnect: Passenger Backrest TED  C3326.
• NOTE: Connect the ohmmeter with the positive lead to pin 2 and the negative lead to pin 4 when measuring. Ohmmeter leads incorrectly connected can result in false readings and lead to incorrect identification of components that are not faulty.

  Measure the resistance between passenger backrest TED  C3326 pin 2 and pin 4, component side.

  Fig 22: Measuring Resistance Between Passenger Backrest TED (C3326) Pin 2 And Pin 4

  Courtesy of FORD MOTOR CO.

Is the resistance between 4, 000 ohms and 10, 000 ohms? 

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

  DISCONNECT the battery ground cable.

  CONNECT passenger seat side air bag module C327.

  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.

  REPOWER the SRS  . REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

• NOTE: Connect the ohmmeter with the positive lead to C3036C-4  , circuit VHS21 (BU/WH), harness side and the negative lead to C3036C-7  , circuit RHS08 (VT/WH), harness side when measuring. Ohmmeter leads incorrectly connected can result in false readings and lead to incorrect identification of components that are not faulty.

  Measure the resistance between DCSM C3036C-4  , circuit VHS21 (BU/WH), harness side and DCSM C3036C-7  , circuit RHS08 (VT/WH), harness side.

  Fig 23: Measuring Resistance Between DCSM (C3036C-4) Circuit VHS21 (BU/WH) And DCSM (C3036C-7), Circuit RHS08 (VT/WH)

  Courtesy of FORD MOTOR CO.

Is the resistance between 240, 000 ohms and 420, 000 ohms? 

• Yes  : GO to  AR31.
• No  : GO to AR30  .

• Disconnect: Passenger Backrest TED  C3326.
• NOTE: Connect the ohmmeter with the positive lead to pin 7 and the negative lead to pin 4 when measuring. Ohmmeter leads incorrectly connected can result in false readings and lead to incorrect identification of components that are not faulty.

  Measure the resistance between passenger backrest TED  C3326 pin 7 and pin 4, component side.

  Fig 24: Measuring Resistance Between Passenger Backrest TED (C3326) Pin 7 And Pin 4

  Courtesy of FORD MOTOR CO.

Is the resistance between 240, 000 ohms and 420, 000 ohms? 

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

  DISCONNECT the battery ground cable.

  CONNECT passenger seat side air bag module C327.

  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.

  REPOWER the SRS  . REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

• Ignition OFF.
• Depower the SRS  . Refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING .
• Disconnect: Passenger Seat Side Air Bag C327.
• Disconnect: DCSM  C3036B.
• 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 DCSM C3036B-4  , circuit VHS36 (YE/BU), harness side and ground.
  Fig 25: Measuring Voltage Between DCSM (C3036B-4), Circuit VHS36 (YE/BU), Harness Side And Ground

  Courtesy of FORD MOTOR CO.

Is any voltage present? 

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

  DISCONNECT the battery ground cable.

  CONNECT passenger seat side air bag module C327.

  REPOWER the SRS  . REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

• No  : GO to AR32  .

• Ignition OFF.
• Measure the resistance between DCSM C3036B-4  , circuit VHS36 (YE/BU), harness side and ground.
  Fig 26: Measuring Resistance Between DCSM (C3036B-4), Circuit VHS36 (YE/BU), Harness Side And Ground

  Courtesy of FORD MOTOR CO.

Is the resistance greater than 10, 000 ohms? 

• Yes  : GO to AR33  .
• No  : REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.

  DISCONNECT the battery ground cable.

  CONNECT passenger seat side air bag module C327.

  REPOWER the SRS  . REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

• Measure the resistance between DCSM C3036B-4  , circuit VHS36 (YE/BU), harness side and DCSM C3036B-5  , circuit RHS20 (GN/BU), harness side. Note the ambient temperature and refer to the following chart.

  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 27: Measuring Resistance Between DCSM (C3036B-4), Circuit VHS36 (YE/BU) And DCSM (C3036B-5), Circuit RHS20 (GN/BU)
Courtesy of FORD MOTOR CO.

Is the resistance within the limits indicated? 

• 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 passenger seat side air bag module C327.

  REPOWER the SRS  . REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

• No  : GO to AR34  .

• Disconnect: Passenger Backrest TED  C3326.
• Measure the resistance between passenger backrest TED  pin 5 and pin 8, component side. Note the ambient temperature and refer to the following chart.

  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 28: Measuring Resistance Between Passenger Backrest TED Pin 5 And Pin 8
Courtesy of FORD MOTOR CO.

Is the resistance within the limits indicated? 

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

  DISCONNECT the battery ground cable.

  CONNECT passenger seat side air bag module C327.

  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.

  REPOWER the SRS  . REFER to SUPPLEMENTAL RESTRAINT SYSTEM .