LEMON Manuals: Even more car manuals for everyone
Home >> Ford >> 2000 >> Contour SE, 2.5 L, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 440 (Seating) >> Diagnosis And Testing >> Seats >> Symptom Chart >> Pinpoint Test M: The Right Rear Heated Seat Is Inoperative >> Overview

Pinpoint Test M: The Right Rear Heated Seat Is Inoperative: Overview

WARNING: This page is about a different car, the 2004 Lincoln LS. However, it is still accessible from the selected car via links, so may be relevant.
  1. M1 CHECK THE HEATED SEAT SWITCH INPUT TO THE HEATED SEAT MODULE 
    • Key in OFF position.
    • Disconnect: Right Rear Heated Seat Module C3163.
    • Measure the resistance between right rear heated seat module C3163-8, circuit 8-HC21 (WH/GN), and C3163-11, circuit 10-HC21A (GY/OG), harness side and ground while pressing the heated seat switch.
      Fig 1: Measuring Resistance Between Right Rear Heated Seat Module C3163-8, Circuit 8-HC21 (WH/GN)
      G03203764Courtesy of FORD MOTOR CO.
    • Are the resistances less than 5 ohms when the heated seat switch is pressed? 
    1. Yes  : GO to  M3.
    2. No  : GO to M2.
  2. M2 CHECK HEATED SEAT SWITCH GROUND CIRCUIT 31-HC21 (BK/GN) 
    • Disconnect: Right Rear Heated Seat Switch C822.
    • Measure the resistance between right rear heated seat switch C822-1, circuit 31-HC21 (BK/GN), harness side and ground.
      Fig 2: Measuring Resistance Between Right Rear Heated Seat Switch C822-1, Circuit 31-HC21 (BK/GN), Harness Side And Ground
      G03203765Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    1. Yes  : INSTALL a new heated seat switch. TEST the system for normal operation.
    2. No  : REPAIR circuit 31-HC21 (BK/GN). TEST the system for normal operation.
  3. M3 CHECK CIRCUIT 30-HC21 (RD/GN) FOR VOLTAGE TO THE HEATED SEAT MODULE 
    • Measure the voltage between right rear heated seat module C3163-12, circuit 30-HC21 (RD/GN), harness side and ground.
      Fig 3: Measuring Voltage Between Right Rear Heated Seat Module C3163-12, Circuit 30-HC21 (RD/GN), Harness Side And Ground
      G03203766Courtesy of FORD MOTOR CO.
    • Is the voltage greater than 10 volts? 
    1. Yes  : GO to M4.
    2. No  : REPAIR circuit 30-HC21 (RD/GN). TEST the system for normal operation.
  4. M4 CHECK CIRCUIT 20-HC21D (PK/BK) FOR VOLTAGE TO THE HEATED SEAT MODULE 
    • Key in ON position.
    • Measure the voltage between right rear heated seat module C3163-5, circuit 20-HC21D (PK/BK), harness side and ground.
      Fig 4: Measuring Voltage Between Right Rear Heated Seat Module C3163-5, Circuit 20-HC21D (PK/BK), Harness Side And Ground
      G03203767Courtesy of FORD MOTOR CO.
    • Is the voltage greater than 10 volts? 
    1. Yes  : GO to M5.
    2. No  : REPAIR circuit 20-HC21D (PK/BK). TEST the system for normal operation.
  5. M5 CHECK HEATED SEAT MODULE GROUND CIRCUIT 31-HC21 (BK/GN) 
    • Key in OFF position.
    • Measure the resistance between right rear heated seat module C3163-1, circuit 31-HC21 (BK/GN), harness side and ground.
      Fig 5: Measuring Resistance Between Right Rear Heated Seat Module C3163-1, Circuit 31-HC21 (BK/GN), Harness Side And Ground
      G03203768Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    1. Yes  : GO to M6.
    2. No  : REPAIR circuit 31-HC21 (BK/GN). TEST the system for normal operation.
  6. M6 CHECK THE SEAT CUSHION HEATER AND THE SEAT BACK HEATER CIRCUITS 
    • Measure the resistance between the right rear heated seat module C3163-6, circuit 20-HC17 (PK), harness side and C3163-7, circuit 31S-HC16 (BK/BU), harness side; and between the right rear heated seat module C3163-6, circuit 20-HC17 (PK), harness side and ground.
      Fig 6: Measuring Resistance Between Right Rear Heated Seat Module C3163-6, Circuit 20-HC17 (PK), Harness Side
      G03203769Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 1.6 ohms and less than 10 ohms between C3163-6 and C3163-7 and greater than 10,000 ohms between C3163-6 and ground? 
    1. Yes  : GO to M7.
    2. No  : GO to  M12.
  7. M7 CHECK THE SEAT CUSHION HEATER AND THE SEAT BACK HEATER CIRCUITS FOR A SHORT TO VOLTAGE 
    • Key in ON position.
    • Measure the voltage between the right rear heated seat module C3163-6, circuit 20-HC17 (PK), harness side and ground and between C3163-7, circuit 31S-HC16 (BK/BU), harness side and ground.
      Fig 7: Measuring Voltage Between Right Rear Heated Seat Module C3163-6, Circuit 20-HC17 (PK), Harness Side And Ground
      G03203770Courtesy of FORD MOTOR CO.
    • Is voltage present on either circuit? 
    1. Yes  : REPAIR the circuit 20-HC17 (PK),31S-HC16 (BK/BU) or 20S-HC16 (PK/BU). TEST the system for normal operation.
    2. No  : GO to M8.
  8. M8 CHECK THE HEATED SEAT TEMPERATURE SENSOR AND CIRCUITS FOR A SHORT TO VOLTAGE 
    • Measure the voltage between the right rear heated seat module C3163-3, circuit 9-HC23 (BN/YE), harness side and ground and between C3163-4, circuit 8-HC23 (WH/BK), harness side and ground.
      Fig 8: Measuring Voltage Between Right Rear Heated Seat Module C3163-3, Circuit 9-HC23 (BN/YE), Harness Side And Ground
      G03203771Courtesy of FORD MOTOR CO.
    • Is voltage present on either circuit? 
    1. Yes  : REPAIR the affected circuit. TEST the system for normal operation.
    2. No  : GO to M9.
  9. M9 CHECK THE HEATED SEAT TEMPERATURE SENSOR AND CIRCUITS 
    • Key in OFF position.
    • Measure the resistance between the right rear heated seat module C3163-3, circuit 9-HC23 (BN/YE), harness side and C3163-4, circuit 8-HC23 (WH/BK), harness side; and between the right rear heated seat module C3163-3, circuit 9-HC23 (BN/YE), harness side and ground.
      Fig 9: Measuring Resistance Between Right Rear Heated Seat Module C3163-3, Circuit 9-HC23 (BN/YE), Harness Side
      G03203772Courtesy of FORD MOTOR CO.
    • Is the resistance less than 300,000 ohms and greater than 50 ohms between C3163-3 and C3163-4 and greater than 10,000 ohms between C3163-3 and ground? 
    1. Yes  : INSTALL a new right rear heated seat module. TEST the system for normal operation.
    2. No  : GO to M10.
  10. M10 CHECK CIRCUIT 9-HC23 (BN/YE) FOR AN OPEN OR SHORT TO GROUND 
    • Disconnect: Right Rear Seat Cushion Heater C3169.
    • Measure the resistance between the right rear heated seat module C3163-3, circuit 9-HC23 (BN/YE), harness side and the right rear seat cushion heater C3169-3, circuit 9-HC23 (BN/YE), harness side; and between the right rear heated seat module C3163-3, circuit 9-HC23 (BN/YE), harness side and ground.
      Fig 10: Measuring Resistance Between Right Rear Heated Seat Module C3163-3, Circuit 9-HC23 (BN/YE), Harness Side
      G03203773Courtesy 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? 
    1. Yes  : GO to M11.
    2. No  : REPAIR circuit 9-HC23 (BN/YE). TEST the system for normal operation.
  11. M11 CHECK CIRCUIT 8-HC23 (WH/BK) FOR AN OPEN OR SHORT TO GROUND 
    • Measure the resistance between the right rear heated seat module C3163-4, circuit 8-HC23 (WH/BK), harness side and the right rear seat cushion heater C3169-2, circuit 8-HC23 (WH/BK), harness side; and between the right rear heated seat module C3163-4, circuit 8-HC23 (WH/BK), harness side and ground.
      Fig 11: Measuring Resistance Between Right Rear Heated Seat Module C3163-4, Circuit 8-HC23 (WH/BK), Harness Side
      G03203774Courtesy 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? 
    1. Yes  : INSTALL a new right rear seat cushion heater. TEST the system for normal operation.
    2. No  : REPAIR circuit 8-HC23 (WH/BK). TEST the system for normal operation.
  12. M12 CHECK CIRCUIT 20-HC17 (PK) FOR OPEN OR SHORT TO GROUND 
    • Disconnect: Right Rear Seat Cushion Heater C3169.
    • Measure the resistance between right rear heated seat module C3163-6, circuit 20-HC17 (PK), harness side and right rear seat cushion heater C3169-1, circuit 20-HC17 (PK), harness side; and between right rear heated seat module C3163-6, circuit 20-HC17 (PK), harness side and ground.
      Fig 12: Measuring Resistance Between Right Rear Heated Seat Module C3163-6, Circuit 20-HC17 (PK), Harness Side
      G03203775Courtesy 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? 
    1. Yes  : GO to M13.
    2. No  : REPAIR circuit 20-HC17 (PK).TEST the system for normal operation.
  13. M13 CHECK CIRCUIT 31S-HC16 (BK/BU) FOR AN OPEN OR A SHORT TO GROUND 
    • Disconnect: Right Rear Seat Back Heater C3170.
    • Measure the resistance between right rear heated seat module C3163-7, circuit 31S-HC16 (BK/BU), harness side and right rear seat back heater C3170-2, circuit 31S-HC16 (BK/BU), harness side; and between right rear heated seat module C3163-7, circuit 31S-HC16 (BK/BU), harness side and ground.
      Fig 13: Measuring Resistance Between Right Rear Heated Seat Module C3163-7, Circuit 31S-HC16 (BK/BU), Harness Side
      G03203776Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms between the heated seat module and the seat back heater, and greater than 10,000 ohms between the heated seat module and ground? 
    1. Yes  : GO to M14.
    2. No  : REPAIR circuit 31S-HC16 (BK/BU). TEST the system for normal operation.
  14. M14 CHECK CIRCUIT 20S-HC16 (PK/BU) FOR AN OPEN OR A SHORT TO GROUND 
    • Measure the resistance between right rear seat cushion heater C3169-4, circuit 20S-HC16 (PK/BU), harness side and right rear seat back heater C3170-1, circuit 20S-HC16 (PK/BU), harness side; and between right rear seat cushion heater C3169-4, circuit 20S-HC16 (PK/BU), harness side and ground.
      Fig 14: Measuring Resistance Between Right Rear Seat Cushion Heater C3169-4, Circuit 20S-HC16 (PK/BU), Harness Side
      G03203777Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms between the seat cushion heater and the seat back heater, and greater than 10,000 ohms between the seat cushion heater and ground? 
    1. Yes  : GO to M15.
    2. No  : REPAIR circuit 20S-HC16 (PK/BU). TEST the system for normal operation.
  15. M15 CHECK THE SEAT BACK HEATER 
    • Disconnect: Right Seat Back Heater Connector.
    • Measure the resistance between right rear seat back heater pin 1 and pin 2, seat back heater component side.
      Fig 15: Measuring Resistance Between Right Rear Seat Back Heater Pin 1 And Pin 2, Seat Back Heater Component Side
      G03203778Courtesy of FORD MOTOR CO.
    • Is the resistance between 0.6 and 0.9 ohm? 
    1. Yes  : INSTALL a new right rear seat cushion heater. TEST the system for normal operation.
    2. No  : INSTALL a new right rear seat back heater. TEST the system for normal operation.
scientia non olet · About LEMON Manuals