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Pinpoint Test T: The Heated Seats Are Inoperative - Rear

WARNING: This page is about a different car, the 2008 Mercury Sable, 2008 Ford Taurus X, and 2008 Ford Taurus. However, it is still accessible from the selected car via links, so may be relevant.
  1. T1 CHECK THE VOLTAGE TO THE HEATED SEAT MODULE 
    • Disconnect: Heated Seat Module C3162
    • Key in ON position.
    • Measure the voltage between heated seat module C3162-2, circuit CBP35 (YE/GY), harness side and ground; and between heated seat module C3162-1, circuit SBB05 (GY/RD), harness side and ground.
      • Fig 1: Measuring Voltage
      GF0016377Courtesy of FORD MOTOR CO.
    • Are the voltages greater than 10 volts? 
    1. YES  : Go to  T2.
    2. NO  : VERIFY battery junction box (BJB) fuse 5 (20A) and SJB fuse 35 (10A) are OK. If OK, REPAIR the affected circuit. TEST the system for normal operation.
  2. T2 CHECK THE HEATED SEAT MODULE GROUND 
    • Key in OFF position.
    • Measure the resistance between heated seat module C3162-7, circuit GD133 (BK), harness side and ground.
      • Fig 2: Measuring Resistance
      GF0016378Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    1. YES  : Go to  T3.
    2. NO  : REPAIR the circuit. TEST the system for normal operation.
  3. T3 CHECK THE SENSOR RETURN CIRCUIT FOR SHORT TO VOLTAGE 
    • Key in ON position.
    • Measure the voltage between heated seat module C3162-13, circuit RHS41 (GN/BN), harness side and ground.
      • Fig 3: Measuring Voltage
      GF0030783Courtesy of FORD MOTOR CO.
    • Is voltage greater than 0.2 volt? 
    1. YES  : REPAIR the circuit. TEST the system for normal operation.
    2. NO  : Go to  T4.
  4. T4 CHECK THE SENSOR RETURN CIRCUIT FOR SHORT TO GROUND 
    • Key in OFF position.
    • Measure the resistance between heated seat module C3162-13, circuit RHS41 (GN/BN), harness side and ground.
      • Fig 4: Measuring Resistance
      GF0030784Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 10,000 ohms? 
    1. YES  : Go to  T5.
    2. NO  : REPAIR the circuit. TEST the system for normal operation.
  5. T5 CHECK THE SENSOR RETURN CIRCUIT FOR AN OPEN 
    • Disconnect: Right Rear Heated Seat C3169
    • Measure the resistance between heated seat module C3162-13, circuit RHS41 (GN/BN), harness side and right rear heated seat C3169-3, circuit RHS41 (GN/BN), harness side.
      • Fig 5: Measuring Resistance
      GF0045414Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    1. YES  : INSTALL a new heated seat module. REFER to Heated Seat Module - Rear . TEST the system for normal operation.
    2. NO  : REPAIR the circuit. TEST the system for normal operation.
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