LEMON Manuals: Even more car manuals for everyone
Home >> Lincoln >> 2010 >> MKZ AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1258 (Seat System - Seats) >> Diagnosis And Testing >> Seats >> Pinpoint Tests >> Pinpoint Test B: The Power Seat Does Not Move Horizontally/Vertically >> Pinpoint Test B: The Power Seat Does Not Move Horizontally/Vertically

Pinpoint Test B: The Power Seat Does Not Move Horizontally/Vertically

WARNING: This page is about a different car, the 2010 Mercury Mariner and 2010 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: The air bag warning indicator illuminates when the correct Restraints Control Module (RCM) fuse is removed and the ignition is ON.
NOTE: The Supplemental Restraint System (SRS) must be fully operational and free of faults before releasing the vehicle to the customer.
  1. B1 CHECK THE HORIZONTAL MOTOR FOR CORRECT OPERATION 
    • Operate the seat forward and rearward.
    • Does the seat move forward and rearward? 
    • Yes:  GO to B2  .
    • No:  GO to  B9.
  2. B2 DETERMINE THE SEAT HEIGHT ADJUST FAILURE 
    • Adjust both front and rear seat height up and down to determine the failure.
    • Does the seat operate in either set of directions? 
    • Yes:  If only front height adjustment operates, GO to B3  .

      If only rear height adjustment operates, GO to  B6.

    • No:  INSTALL a new driver seat control switch. REFER to SEAT CONTROL SWITCH . TEST the system for normal operation.
  3. B3 CHECK VOLTAGE TO THE REAR HEIGHT MOTOR 
    • Ignition OFF.
    • Depower the SRS  . Refer to Supplemental Restraint System (SRS) Depowering and Repowering in the General Procedures portion of SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING .
    • Disconnect: Driver Seat Side Air Bag C367.
    • Disconnect: Driver Safety Belt Buckle Pretensioner C3201.
    • Disconnect: Power Seat Motor Assembly C353.
      • WARNING: Make sure no one is in the vehicle and there is nothing blocking or placed in front of any air bag module when the battery is connected. Failure to follow these instructions may result in serious personal injury in the event of an accidental deployment.
    • Connect the battery ground cable. Refer to BATTERY DISCONNECT .
    • Measure voltage between power seat motor C353-2, circuit CPS27 (BU/BN), harness side and C353-3, circuit CPS26 YE/BU), harness side, while pressing the seat control switch rear height adjust up and down.
      Fig 1: Measuring Voltage Between Power Seat Motor C353-2 And C353-3
      G06391282Courtesy of FORD MOTOR CO.
    • Is the voltage greater than 10 volts when the seat control switch is operated in both directions and 0 volt in the rest position? 
  4. B4 CHECK THE REAR HEIGHT MOTOR CIRCUIT FOR AN OPEN 
    • Disconnect: Seat Control Switch C352.
    • Measure the resistance between seat control switch C352-5, circuit CPS27 (BU/BN), harness side and power seat motor assembly C353-2, circuit CPS27 (BU/BN), harness side.
      Fig 2: Checking Rear Height Motor Circuit CPS27 (BU/BN) For An Open
      G06099618Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    • Yes:  GO to B5  .
    • No:  REPAIR the circuit. TEST the system for normal operation.

      DISCONNECT the battery ground cable. CONNECT driver seat safety belt buckle pretensioner C3201 and driver seat side air bag C367.

      REPOWER the SRS  . REFER to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING .

  5. B5 CHECK THE REAR HEIGHT MOTOR CIRCUIT FOR AN OPEN 
    • Measure the resistance between seat control switch C352-7, circuit CPS26 (YE/BU), harness side and power seat motor assembly C353-3, circuit CPS26 (YE/BU), harness side.
      Fig 3: Checking Rear Height Motor Circuit CPS26 (YE/BU) For An Open
      G06099620Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
  6. B6 CHECK VOLTAGE TO THE FRONT HEIGHT MOTOR 
    • Ignition OFF.
    • Depower the SRS  . Refer to Supplemental Restraint System (SRS) Depowering and Repowering in the General Procedures portion of SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING .
    • Disconnect: Driver Seat Side Air Bag C367.
    • Disconnect: Driver Safety Belt Buckle Pretensioner C3201.
    • Disconnect: Power Seat Motor Assembly C353.
      • WARNING: Make sure no one is in the vehicle and there is nothing blocking or placed in front of any air bag module when the battery is connected. Failure to follow these instructions may result in serious personal injury in the event of an accidental deployment.
    • Connect the battery ground cable. Refer to BATTERY DISCONNECT .
    • Measure the voltage between power seat front height motor C353-5, circuit CPS24 (GY), harness side and C353-6, circuit CPS25 (WH/VT), while operating the seat control switch front height adjust up and down.
      Fig 4: Measuring Voltage Between Power Seat Front Height Motor C353-5 And C353-6
      G06391285Courtesy of FORD MOTOR CO.
    • Is the voltage greater than 10 volts when the seat control switch is operated in both directions and 0 volt in the rest position? 
  7. B7 CHECK THE FRONT HEIGHT MOTOR CIRCUIT FOR AN OPEN 
    • Disconnect: Seat Control Switch C352.
    • Measure the resistance between seat control switch C352-1, circuit CPS25 (WH/VT), harness side and power seat motor assembly C353-6, circuit CPS25 (WH/VT), harness side.
      Fig 5: Checking Front Height Motor Circuit CPS25 (WH/VT) For An Open
      G06099622Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    • Yes:  GO to B8  .
    • No:  REPAIR the circuit. TEST the system for normal operation.

      DISCONNECT the battery ground cable. CONNECT driver seat safety belt buckle pretensioner C3201 and driver seat side air bag C367.

      REPOWER the SRS  . REFER to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING .

  8. B8 CHECK THE FRONT HEIGHT MOTOR CIRCUIT FOR AN OPEN 
    • Measure the resistance between seat control switch C352-8, circuit CPS24 (GY), harness side and power seat motor assembly C353-5, circuit CPS24 (GY), harness side.
      Fig 6: Checking Front Height Motor Circuit CPS24 (GY) For An Open
      G06099624Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
  9. B9 CHECK VOLTAGE TO THE HORIZONTAL MOTOR 
    • Ignition OFF.
    • Depower the SRS  . Refer to Supplemental Restraint System (SRS) Depowering and Repowering in the General Procedures portion of SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING .
    • Disconnect: Driver Seat Side Air Bag C367.
    • Disconnect: Driver Safety Belt Buckle Pretensioner C3201.
    • Disconnect: Power Seat Motor Assembly C353.
      • WARNING: Make sure no one is in the vehicle and there is nothing blocking or placed in front of any air bag module when the battery is connected. Failure to follow these instructions may result in serious personal injury in the event of an accidental deployment.
    • Connect the battery ground cable. Refer to BATTERY DISCONNECT .
    • Measure the voltage between power seat motor C353-4, circuit CPS23 (GN/VT), harness side and C353-1, circuit CPS28 (GN), harness side, while pushing the driver seat control switch forward and rearward.
      Fig 7: Measuring Voltage Between Power Seat Motor C353-4 And C353-1
      G06391288Courtesy of FORD MOTOR CO.
    • Is the voltage greater than 10 volts when the seat control switch is operated in both directions and 0 volt in the rest position? 
  10. B10 CHECK THE HORIZONTAL MOTOR CIRCUIT FOR AN OPEN 
    • Disconnect: Seat Control Switch C352.
    • Measure the resistance between seat control switch C352-3, circuit CPS23 (GN/VT), harness side and power seat motor assembly C353-4, circuit CPS23 (GN/VT), harness side.
      Fig 8: Checking Horizontal Motor Circuit CPS23 (GN/VT) For An Open
      G06099626Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    • Yes:  GO to B11  .
    • No:  REPAIR the circuit. TEST the system for normal operation.

      DISCONNECT the battery ground cable. CONNECT driver seat safety belt buckle pretensioner C3201 and driver seat side air bag C367.

      REPOWER the SRS  . REFER to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING .

  11. B11 CHECK THE HORIZONTAL MOTOR CIRCUIT FOR AN OPEN 
    • Measure the resistance between seat control switch C352-6, circuit CPS28 (GN), harness side and power seat motor assembly C353-1, circuit CPS28 (GN), harness side.
      Fig 9: Checking Horizontal Motor Circuit CPS28 (GN) For An Open
      G06099628Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
scientia non olet · About LEMON Manuals