LEMON Manuals: Even more car manuals for everyone
Home >> Lincoln >> 2009 >> MKX FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 2160 (Seat System - Seats) >> Diagnosis And Testing >> Seats >> Pinpoint Tests >> Pinpoint Test AA: The Heated Seat is Inoperative - Right Rear Seat Does Heat But the Heated Seat Indicator Does Not Illuminate When Pressed >> Pinpoint Test Aa: The Heated Seat Is Inoperative - Right Rear Seat Does Heat But The Heated Seat Indicator Does Not Illuminate When Pressed

Pinpoint Test Aa: 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 2010 Lincoln MKX and 2010 Ford Edge. However, it is still accessible from the selected car via links, so may be relevant.
WARNING: Never install heated seat parts not intended for use on this vehicle. Parts released for other model years or vehicle lines are not compatible even if they appear visually and physically similar. Installing incorrect parts will result in heated seat system performance outside design specification. Failure to follow this instruction may result in serious personal injury.
  1. AA1 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.
    • Measure the resistance between:
      • heated seat module C3162-3, circuit CHS53 (WH/BN), harness side and ground.
      • heated seat module C3162-6, circuit CHS52 (BU), harness side and ground.
        Fig 1: Measuring Resistance Between Heated Seat Module C3162-3, Circuit CHS53 (WH/BN), Harness Side And Ground
        G06504248Courtesy of FORD MOTOR CO.
    • Are the resistances greater than 10,000 ohms? 
    • Yes:  GO to AA2  .
    • No:  REPAIR the affected circuit. TEST the system for normal operation.
  2. AA2 CHECK CIRCUITS CHS53 (WH/BN) AND CHS52 (BU) FOR AN OPEN 
    • 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.
      • right rear heated seat switch C822-4, circuit CHS52 (BU), harness side and heated seat module C3162-6, circuit CHS52 (BU), harness side.
        Fig 2: Measuring Resistance Between Right Rear Heated Seat Switch C822-3 And Heated Seat Module C3162-3
        G06504249Courtesy of FORD MOTOR CO.
    • Are the resistances less than 5 ohms? 
    • Yes:  GO to AA3  .
    • No:  REPAIR the affected circuit. TEST the system for normal operation.
  3. AA3 CHECK THE HEATED SEAT HI INDICATOR 
    • Connect: Right Rear Heated Seat Switch C822.
    • Ignition ON.
    • 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.
      Fig 3: Connecting Fused Jumper Lead Between Heated Seat Module C329-6, Circuit CHS14 (GN) And C329-1, Circuit SBB16 (VT/RD)
      G06504205Courtesy of FORD MOTOR CO.
    • Does the hi indicator LED illuminate on the right rear heated seat switch? 
  4. AA4 CHECK THE HEATED SEAT LOW INDICATOR 
    • 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.
      Fig 4: Connecting Fused Jumper Lead Between Heated Seat Module C3162- 3, Circuit CHS53 (WH/BN) And C3162-17, Circuit SBB07 (WH/RD)
      G06504251Courtesy of FORD MOTOR CO.
    • Does the low indicator LED illuminate on the right rear heated seat switch? 
scientia non olet · About LEMON Manuals