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Home >> Lincoln >> 2009 >> MKX FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1111 (Seat System) >> Diagnostic Tests >> Seats >> Pinpoint Tests >> Pinpoint Test AD: The Heated Seat is Inoperative - Right Rear Seat Does Heat But the Heated Seat Indicator Does Not Illuminate When Pressed >> Pinpoint Test Ad: The Heated Seat Is Inoperative - Right Rear Seat Does Heat But The Heated Seat Indicator Does Not Illuminate When Pressed

Pinpoint Test Ad: The Heated Seat Is Inoperative - Right Rear Seat Does Heat But The Heated Seat Indicator Does Not Illuminate When Pressed

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. AD1 CHECK CIRCUITS CHS53 (WH/BN) AND CHS52 (BU) FOR A SHORT TO GROUND 
    • Disconnect: Right Rear Heated Seat Switch C822
    • Disconnect: Heated Seat Module C3162
      • Fig 1: Measuring Resistance Between Heated Seat Module C3162-3 & C3162-6, Circuit CHS53 (WH/BN) & CHS52 (BU)
      GF0030826Courtesy of FORD MOTOR CO.
    • Measure the resistance between heated seat module C3162-3, circuit CHS53 (WH/BN), harness side and ground; and between heated seat module C3162-6, circuit CHS52 (BU), harness side and ground.
    • Are the resistances greater than 10,000 ohms? 
    1. YES  : Go to  AD2.
    2. NO  : REPAIR the affected circuit. TEST the system for normal operation.
  2. AD2 CHECK CIRCUITS CHS53 (WH/BN) AND CHS52 (BU) FOR AN OPEN 
      Fig 2: Measuring Resistance Between Right Rear Heated Seat Switch C822-3, Circuit CHS53 (WH/BN) & Heated Seat Module C3162-3
      GF0030827Courtesy of FORD MOTOR CO.
    • Measure the resistance between right rear heated seat switch C822-3, circuit CHS53 (WH/BN), harness side and heated seat module C3162-3, circuit CHS53 (WH/BN), harness side; and between right rear heated seat switch C822-4, circuit CHS52 (BU), harness side and heated seat module C3162-6, circuit CHS52 (BU), harness side.
    • Are the resistances less than 5 ohms? 
    1. YES  : Go to  AD3.
    2. NO  : REPAIR the affected circuit. TEST the system for normal operation.
  3. AD3 CHECK THE HEATED SEAT HI INDICATOR 
    • Connect: Right Rear Heated Seat Switch C822
    • Key in ON position.
      • Fig 3: Connecting Fused Jumper Lead Between Heated Seat Module C3162-6 & C3162-1, Circuit CHS52 (BU) & SBB07 (WH/RD)
      GF0028300Courtesy of FORD MOTOR CO.
    • Connect a fused jumper lead between heated seat module C3162-6, circuit CHS52 (BU), harness side and C3162-1, circuit SBB07 (WH/RD), harness side.
    • Does the hi indicator LED illuminate on the right rear heated seat switch? 
    1. YES  : Go to  AD4.
    2. NO  : INSTALL a new rear heated seat switch. REFER to Heated Seat Switch - Rear Seat . TEST the system for normal operation.
  4. AD4 CHECK THE HEATED SEAT LOW INDICATOR 
      Fig 4: Connecting Fused Jumper Lead Between Heated Seat Module C3162-6 & C3162-17, Circuit CHS53 (WH/BN) & SBB07 (WH/RD)
      GF0028301Courtesy of FORD MOTOR CO.
    • Connect a fused jumper lead between heated seat module C3162-3, circuit CHS53 (WH/BN), harness side and C3162-17, circuit SBB07 (WH/RD), harness side.
    • Does the low indicator LED illuminate on the right rear heated seat switch? 
    1. YES  : INSTALL a new heated seat module. REFER to Heated Seat Module - Rear Seat . TEST the system for normal operation.
    2. NO  : INSTALL a new rear heated seat switch. REFER to Heated Seat Switch - Rear Seat . TEST the system for normal operation.
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