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Home >> Ford >> 2015 >> Explorer Limited, 3.5L Eng VIN 8, AWD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Seats >> Seating System - 2ND Row >> Diagnosis And Testing >> Seating >> Pinpoint Tests >> PINPOINT TEST H : The Heated Seat is Inoperative/Does Not Operate Correctly - RH >> PINPOINT TEST H : The Heated Seat is Inoperative/Does Not Operate Correctly - RH

PINPOINT TEST H : The Heated Seat is Inoperative/Does Not Operate Correctly - RH

  1. H1 CHECK THE REAR HEATED SEAT SWITCH OUTPUT

    • Ignition OFF.
    • Disconnect: Heated Seat Module C3304A .
    • While pressing and releasing the RH rear heated seat switch, measure:
      Positive Lead Measurement / Action Negative Lead
      C3304A-8
      GFD33596Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the resistance less than 5 ohms when the heated seat switch is pressed and greater than 10, 000 ohms when the heated seat switch is released? 

    Yes  GO to  H3.
    No  GO to  H2.

  2. H2 CHECK THE HEATED SEAT SWITCH CIRCUIT FOR AN OPEN OR SHORT TO GROUND

    • Disconnect: Auxiliary Climate Control Assembly C3198A .
    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C3304A-8
      GFD33596Courtesy of FORD MOTOR COMPANY
      		 C3198A-13
      C3304A-8
      GFD33596Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the resistance less than 3 ohms between the heated seat module and the auxiliary climate control assembly and greater than 10, 000 ohms between the heated seat module and ground? 

    Yes  INSTALL a new auxiliary climate control assembly. REFER to Auxiliary Climate Control .
    No  REPAIR the circuit.

  3. H3 CHECK FOR VOLTAGE TO THE HEATED SEAT MODULE

    • Disconnect: Heated Seat Module C3304B .
    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C3304B-3
      GFD33595Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the voltage greater than 11 volts? 

    Yes  GO to  H4.
    No  REPAIR the circuit.

  4. H4 CHECK THE HEATER MATS RESISTANCE AND HEATER CIRCUITS FOR AN OPEN

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C3304B-6
      GFD33596Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the resistance between 3 and 5 ohms? 

    Yes  GO to  H9.
    No  GO to  H5.

  5. H5 CHECK THE HEATER MATS GROUND CIRCUIT FOR AN OPEN

    • Disconnect: Right Rear Cushion Heater Mat C3169 .
    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C3169-1
      GFD33596Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the resistance less than 3 ohms? 

    Yes  GO to  H6.
    No  REPAIR the circuit.

  6. H6 CHECK THE HEATER CIRCUIT FOR AN OPEN OR SHORT TO GROUND

    • Disconnect: Right Rear Backrest Heater Mat C3170 .
    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C3304B-6
      GFD33596Courtesy of FORD MOTOR COMPANY
      		 C3170-1
      C3304B-6
      GFD33596Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the resistance less than 3 ohms between the heated seat module and backrest heater mat, and greater than 10, 000 ohms between the heated seat module and ground? 

    Yes  GO to  H7.
    No  REPAIR the circuit.

  7. H7 CHECK BACKREST HEATER MAT FOR AN OPEN

    • Measure the component side  resistance:
      Positive Lead Measurement / Action Negative Lead
      C3170, pin 1, component side
      GFD33596Courtesy of FORD MOTOR COMPANY
      		 C3170, pin 4, component side

    Is the resistance between 0.7 and 1.5 ohms? 

    Yes  GO to  H8.
    No  INSTALL a new backrest heater mat.

  8. H8 CHECK THE CIRCUIT BETWEEN THE CUSHION AND BACKREST HEATER MATS FOR AN OPEN OR A SHORT TO GROUND

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C3170-4
      GFD33596Courtesy of FORD MOTOR COMPANY
      		 C3169-2
      C3170-4
      GFD33596Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the resistance less than 3 ohms between the backrest heater mat and cushion heater mat, and greater than 10, 000 ohms between the backrest heater mat and ground? 

    Yes  INSTALL a new cushion heater mat.
    No  REPAIR the circuit.

  9. H9 CHECK THE TEMPERATURE SENSOR INPUT CIRCUIT FOR A SHORT TO VOLTAGE

    • Ignition ON.
    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C3304A-9
      GFD33595Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is any voltage present? 

    Yes  REPAIR the circuit.
    No  GO to  H10.

  10. H10 CHECK THE TEMPERATURE SENSOR INPUT CIRCUIT FOR A SHORT TO GROUND

    • Ignition OFF.
    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C3304A-9
      GFD33596Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the resistance greater than 10, 000 ohms? 

    Yes  GO to  H11.
    No  REPAIR the circuit.

  11. H11 CHECK THE TEMPERATURE SENSOR CIRCUITS FOR AN OPEN

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C3304A-9
      GFD33596Courtesy of FORD MOTOR COMPANY
      		 C3304A-12

    Is the resistance between 300 ohms and 300, 000 ohms? 

    Yes  INSTALL a new heated seat module. REFER to Heated Seat Module .
    No  GO to  H12.

  12. H12 CHECK THE TEMPERATURE SENSOR FOR AN OPEN

    • Disconnect: Right Rear Seat Backrest C3170 .
    • Measure the component side  resistance:
      Positive Lead Measurement / Action Negative Lead
      C3170, pin 2, component side
      GFD33596Courtesy of FORD MOTOR COMPANY
      		 C3170, pin 3, component side

    Is the resistance between 300 ohms and 300, 000 ohms? 

    Yes  GO to  H13.
    No  INSTALL a new rear seat backrest heater mat.

  13. H13 CHECK THE TEMPERATURE SENSOR CIRCUIT FOR AN OPEN

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C3304A-9
      GFD33596Courtesy of FORD MOTOR COMPANY
      		 C3170-2

    Is the resistance less than 3 ohms? 

    Yes  REPAIR circuit CHS56 (YE/VT) for an open.
    No  REPAIR the circuit.
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