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Pinpoint Test Y: The Heated Seats Are Inoperative - Rear

WARNING: This page is about a different car, the 2007 Lincoln MKX and 2007 Ford Edge. However, it is still accessible from the selected car via links, so may be relevant.
  1. Y1 CHECK THE VOLTAGE TO THE HEATED SEAT MODULE 
    • Disconnect: Heated Seat Module C3162
    • Key in ON position.
      • Fig 1: Measuring Voltage Between Heated Seat Module C3162-2 & C3162-1, Circuit CBP35 (YE/GY) & SBB07 (WH/RD)
      GF0016377Courtesy of FORD MOTOR CO.
    • 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 SBB07 (WH/RD), harness side and ground.
    • Are the voltages greater than 10 volts? 
    1. YES  : Go to  Y2.
    2. NO  : VERIFY battery junction box (BJB) fuse 7 (30A) and smart power distribution junction box (SPDJB) fuse 35 (10A) are OK. If OK, REPAIR the affected circuit. TEST the system for normal operation.
  2. Y2 CHECK THE HEATED SEAT MODULE GROUND 
    • Key in OFF position.
      • Fig 2: Measuring Resistance Between Heated Seat Module C3162-7, Circuit GD133 (BK) & Ground
      GF0016378Courtesy of FORD MOTOR CO.
    • Measure the resistance between heated seat module C3162-7, circuit GD133 (BK), harness side and ground.
    • Is the resistance less than 5 ohms? 
    1. YES  : Go to  Y3.
    2. NO  : REPAIR the circuit. TEST the system for normal operation.
  3. Y3 CHECK THE SENSOR RETURN CIRCUIT FOR SHORT TO VOLTAGE 
    • Key in ON position.
      • Fig 3: Measuring Voltage Between Heated Seat Module C3162-13, Circuit RHS41 (GN/BN) & Ground
      GF0030783Courtesy of FORD MOTOR CO.
    • Measure the voltage between heated seat module C3162-13, circuit RHS41 (GN/BN), harness side and ground.
    • Is voltage greater than 0.2 volt? 
    1. YES  : REPAIR the circuit. TEST the system for normal operation.
    2. NO  : Go to  Y4.
  4. Y4 CHECK THE SENSOR RETURN CIRCUIT FOR SHORT TO GROUND 
    • Key in OFF position.
      • Fig 4: Measuring Resistance Between Heated Seat Module C3162-13, Circuit RHS41 (GN/BN) & Ground
      GF0030784Courtesy of FORD MOTOR CO.
    • Measure the resistance between heated seat module C3162-13, circuit RHS41 (GN/BN), harness side and ground.
    • Is the resistance greater than 10,000 ohms? 
    1. YES  : Go to  Y5.
    2. NO  : REPAIR the circuit. TEST the system for normal operation.
  5. Y5 CHECK THE SENSOR RETURN CIRCUIT FOR AN OPEN 
    • Disconnect: Right Rear Heated Seat C3169
      • Fig 5: Measuring Resistance Between Heated Seat Module C3162-13, Circuit RHS41 (GN/BN) & Right Rear Heated Seat C3169-3
      GF0030803Courtesy of FORD MOTOR CO.
    • 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.
    • Is the resistance less than 5 ohms? 
    1. YES  : INSTALL a new heated seat module. REFER to Heated Seat Module - Rear Seat . TEST the system for normal operation.
    2. NO  : REPAIR the circuit. TEST the system for normal operation.
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