LEMON Manuals: Even more car manuals for everyone
Home >> Ford >> 2005 >> Escape Hybrid, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 297 (Seat System) >> Diagnosis And Testing >> Seats >> Pinpoint Tests >> Pinpoint Test H: The Heated Seat Is Inoperative - Driver >> Pinpoint Test H: The Heated Seat Is Inoperative - Driver

Pinpoint Test H: The Heated Seat Is Inoperative - Driver

WARNING: This page is about a different car, the 2006 Mercury Grand Marquis and 2006 Ford Crown Victoria. However, it is still accessible from the selected car via links, so may be relevant.
  1. H1 CHECK THE HEATED SEAT SWITCH INPUT TO THE HEATED SEAT MODULE 
    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 supplemental restraint system (SRS) component is being serviced, the SRS must be depowered.
    NOTE: The air bag warning lamp illuminates when the restraints control module (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.
      • 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.
    • For vehicles equipped with seat side air bags, carry out the following:
    • Key in OFF position.
    • Disconnect: Driver Heated Seat Module C359.
    • Measure the resistance between driver heated seat module 0359-8, circuit 1020 (DG/VT), harness side and ground and between 3359-11, circuit 1255 (WH/RD), harness side and ground while pressing the heated seat switch.
      Fig 1: Checking The Heated Seat Switch Input To The Heated Seat Module
      G04585884Courtesy of FORD MOTOR CO.
    • Are the resistances less than 50 ohms when the heated seat switch is pressed and greater than 10,000 ohms when the heated seat switch is not pressed? 

    Yes  : GO to  H3.

    No  : GO to H2.

  2. H2 CHECK HEATED SEAT SWITCH GROUND CIRCUIT 57 (BK) 
    • Disconnect: Driver Heated Seat Switch C538.
    • Measure the resistance between driver heated seat switch C538-1, circuit 57 (BK), harness side and ground.
      Fig 2: Measuring Resistance Between Driver Heated Seat Switch C538-1, Circuit 57 And Ground
      G04585885Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 

    Yes  : INSTALL a new heated seat switch. TEST the system for normal operation. For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver seat side air bag module C315. CONNECT driver seat side air bag module C315. REPOWER the supplemental restraint system (SRS). REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

    No  : REPAIR circuit 57 (BK). TEST the system for normal operation. For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver seat side air bag module C315. CONNECT driver seat side air bag module C315. REPOWER the supplemental restraint system (SRS). REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

  3. H3 CHECK CIRCUIT 1048 (LB/WH) FOR VOLTAGE TO THE HEATED SEAT MODULE 
    • Measure the voltage between driver heated seat module C359-12, circuit 1048 (LB/WH), harness side and ground.
      Fig 3: Measuring Voltage Between Driver Heated Seat Module C359-12, Circuit 1048 And Ground
      G04585886Courtesy of FORD MOTOR CO.
    • Is the voltage greater than 10 volts? 

    Yes  : GO to H4.

    No  : VERIFY the battery junction box (BJB) fuse 15 (20A) is OK. If OK, REPAIR circuit 1048 (LB/WH). TEST the system for normal operation. For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver seat side air bag module C315. CONNECT driver seat side air bag module C315. REPOWER the supplemental restraint system (SRS). REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

  4. H4 CHECK CIRCUIT 1040 (RD/BK) FOR VOLTAGE TO THE HEATED SEAT MODULE 
    • Key in ON position.
    • Measure the voltage between driver heated seat module C359-5, circuit 1040 (RD/BK), harness side and ground.
      Fig 4: Measuring Voltage Between Driver Heated Seat Module C359-5, Circuit 1040 Side And Ground
      G04585887Courtesy of FORD MOTOR CO.
    • Is the voltage greater than 10 volts? 

    Yes  : GO to H5.

    No  : VERIFY the central junction box (CJB) fuse 18 (10A) is OK. If OK, REPAIR circuit 1040 (RD/BK). TEST the system for normal operation. For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver seat side air bag module C315. CONNECT driver seat side air bag module C315. REPOWER the supplemental restraint system (SRS). REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

  5. H5 CHECK HEATED SEAT MODULE GROUND CIRCUIT 57 (BK) 
    • Key in OFF position.
    • Measure the resistance between driver heated seat module C359-1, circuit 57 (BK), harness side and ground.
      Fig 5: Measuring Resistance Between Driver Heated Seat Module C359-1, Circuit 57 And Ground
      G04585888Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 

    Yes  : GO to H6.

    No  : REPAIR circuit 57 (BK). TEST the system for normal operation. For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver seat side air bag module C315. CONNECT driver seat side air bag module C315. REPOWER the supplemental restraint system (SRS). REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

  6. H6 CHECK THE SEAT CUSHION HEATER AND THE SEAT BACK HEATER CIRCUITS 
    • Measure the resistance between driver heated seat module C359-6, circuit 1064 (YE/LB), harness side and C359-7, circuit 1065 (WH/LB), harness side; and between driver heated seat module C359-6, circuit 1064 (YE/LB), harness side and ground.
      Fig 6: Checking The Seat Cushion Heater And The Seat Back Heater Circuits
      G04585889Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 1.6 ohms and less than 10 ohms between C359-6 and C359-7 and greater than 10,000 ohms between C359-6 and ground? 

    Yes  : GO to H7.

    No  : GO to  H12.

  7. H7 CHECK THE SEAT CUSHION HEATER AND THE SEAT BACK HEATER CIRCUITS FOR A SHORT TO VOLTAGE 
    • Key in ON position.
    • Measure the voltage between driver heated seat module C359-6, circuit 1064 (YE/LB), harness side and ground and between C359-7, circuit 1065 (WH/LB), harness side and ground.
      Fig 7: Checking The Seat Cushion Heater And The Seat Back Heater Circuits For A Short To Voltage
      G04585890Courtesy of FORD MOTOR CO.
    • Is voltage present on either circuit? 

    Yes  : REPAIR the affected circuit. TEST the system for normal operation. For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver seat side air bag module C315. CONNECT driver seat side air bag module C315. REPOWER the supplemental restraint system (SRS). REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

    No  : GO to H8.

  8. H8 CHECK THE HEATED SEAT TEMPERATURE SENSOR AND CIRCUITS FOR A SHORT TO VOLTAGE 
    • Measure the voltage between driver heated seat module C359-3, circuit 1061 (BN/LB), harness side and ground and between C359-4, circuit 1060 (BK/LB), harness side and ground.
      Fig 8: Checking The Heated Seat Temperature Sensor And Circuits For A Short To Voltage
      G04585891Courtesy of FORD MOTOR CO.
    • Is voltage present on either circuit? 

    Yes  : REPAIR the affected circuit. TEST the system for normal operation. For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver seat side air bag module C315. CONNECT driver seat side air bag module C315. REPOWER the supplemental restraint system (SRS). REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

    No  : GO to H9.

  9. H9 CHECK THE HEATED SEAT TEMPERATURE SENSOR AND CIRCUITS 
    • Key in OFF position.
    • Measure the resistance between driver heated seat module C359-3, circuit 1061 (BN/LB), harness side and C359-4, circuit 1060 (BK/LB), harness side; and between driver heated seat module C359-3, circuit 1061 (BN/LB), harness side and ground.
      Fig 9: Checking The Heated Seat Temperature Sensor And Circuits
      G04585892Courtesy of FORD MOTOR CO.
    • Is the resistance less than 300,000 ohms and greater than 50 ohms between C359-3 and C359-4 and greater than 10,000 ohms between C359-3 and ground? 

    Yes  : INSTALL a new driver heated seat module. TEST the system for normal operation. For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver seat side air bag module C315. CONNECT driver seat side air bag module C315. REPOWER the supplemental restraint system (SRS). REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

    No  : GO to H10.

  10. H10 CHECK CIRCUIT 1061 (BN/LB) FOR AN OPEN OR SHORT TO GROUND 
    • Disconnect: Driver Seat Cushion Heater C364.
    • Measure the resistance between driver heated seat module C359-3, circuit 1061 (BN/LB), harness side and driver seat cushion heater C364-2, circuit 1061 (BN/LB), harness side; and between driver heated seat module C359-3, circuit 1061 (BN/LB), harness side and ground.
      Fig 10: Checking Circuit 1061 (BN/LB) For An Open Or Short To Ground
      G04585893Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms between the heated seat module and the seat cushion heater and greater than 10,000 ohms between the heated seat module and ground? 

    Yes  : GO to H11.

    No  : REPAIR circuit 1061 (BN/LB). TEST the system for normal operation. For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver seat side air bag module C315. CONNECT driver seat side air bag module C315. REPOWER the supplemental restraint system (SRS). REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

  11. H11 CHECK CIRCUIT 1060 (BK/LB) FOR AN OPEN OR SHORT TO GROUND 
    • Measure the resistance between driver heated seat module C359-4, circuit 1060 (BK/LB), harness side and driver seat cushion heater C364-3, circuit 1060 (BK/LB), harness side; and between driver heated seat module C359-4, circuit 1060 (BK/LB), harness side and ground.
      Fig 11: Checking Circuit 1060 (BK/LB) For An Open Or Short To Ground
      G04585894Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms between the heated seat module and the seat cushion heater and greater than 10,000 ohms between the heated seat module and ground? 

    Yes  : INSTALL a new driver seat cushion heater. TEST the system for normal operation. For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver seat side air bag module C315. CONNECT driver seat side air bag module C315. REPOWER the supplemental restraint system (SRS). REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

    No  : REPAIR circuit 1060 (BK/LB). TEST the system for normal operation. For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver seat side air bag module C315. CONNECT driver seat side air bag module C315. REPOWER the supplemental restraint system (SRS). REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

  12. H12 CHECK CIRCUIT 1064 (YE/LB) FOR AN OPEN OR SHORT TO GROUND 
    • Disconnect: Driver Seat Cushion Heater C364.
    • Measure the resistance between driver heated seat module C359-6, circuit 1064 (YE/LB), harness side and driver seat cushion heater C364-4, circuit 1064 (YE/LB), harness side; and between driver heated seat module C359-6, circuit 1064 (YE/LB), harness side and ground.
      Fig 12: Checking Circuit 1064 (YE/LB) For An Open Or Short To Ground
      G04585895Courtesy of FORD MOTOR CO.
    • Is the resistance less than 1 ohm between the heated seat module and the seat cushion heater, and greater than 10,000 ohms between the heated seat module and ground? 

    Yes  : GO to H13.

    No  : REPAIR circuit 1064 (YE/LB). TEST the system for normal operation. For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver seat side air bag module C315. CONNECT driver seat side air bag module C315. REPOWER the supplemental restraint system (SRS). REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

  13. H13 CHECK CIRCUIT 1065 (WH/LB) FOR AN OPEN OR SHORT TO GROUND 
    • Measure the resistance between driver heated seat module C359-7, circuit 1065 (WH/LB), harness side and driver seat cushion heater C364-1, circuit 1065 (WH/LB), harness side; and between driver heated seat module C359-7, circuit 1065 (WH/LB), harness side and ground.
      Fig 13: Checking Circuit 1065 (WH/LB) For An Open Or Short To Ground
      G04585896Courtesy of FORD MOTOR CO.
    • Is the resistance less than 1 ohm between the heated seat module and the seat cushion heater, and greater than 10,000 ohms between the heated seat module and ground? 

    Yes  : GO to H14.

    No  : REPAIR circuit 1065 (WH/LB). TEST the system for normal operation. For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver seat side air bag module C315. CONNECT driver seat side air bag module C315. REPOWER the supplemental restraint system (SRS). REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

  14. H14 CHECK THE SEAT BACK HEATER 
    • Disconnect: Driver Seat Back Heater Connector.
    • Measure the resistance between driver seat back heater pin 1 and pin 2, seat back heater component side.
      Fig 14: Measuring Resistance Between Driver Seat Back Heater Pin 1 And Pin 2, Seat Back Heater Component Side
      G04585897Courtesy of FORD MOTOR CO.
    • Is the resistance between 0.6 and 0.9 ohm? 

    Yes  : INSTALL a new driver seat cushion heater. TEST the system for normal operation. For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver seat side air bag module C315. CONNECT driver seat side air bag module C315. REPOWER the supplemental restraint system (SRS). REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

    No  : INSTALL a new driver seat back heater. TEST the system for normal operation. For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver seat side air bag module C315. CONNECT driver seat side air bag module C315. REPOWER the supplemental restraint system (SRS). REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

scientia non olet · About LEMON Manuals