Pinpoint Test J: The Power Seat Does Not Move Horizontally/Vertically/Recline - Passenger
Seats
Pinpoint Test J: The Power Seat Does Not Move Horizontally/Vertically/Recline - MKZ, Passenger
Refer to Wiring Diagram Set 120, Power Seats for schematic and connector information. [1][2]Diagrams By Number
Normal Operation
The passenger seat control switch is supplied voltage and ground. When the passenger seat control switch is activated, voltage and ground is supplied to the applicable seat track motor to move the seat to the desired position. There are 3 seat track motors that combine to move the seat cushion horizontally (forward/rearward) and vertically (front up/down and rear up/down). If a new motor on the seat track needs to be installed, it is necessary to install an entire seat track assembly. There is an additional motor in the seat recliner mechanism to move the seat backrest forward and rearward.
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Seat control switch
- Seat track
- Seat recliner motor
PINPOINT TEST J : THE POWER SEAT DOES NOT MOVE HORIZONTALLY/VERTICALLY/RECLINE - MKZ, PASSENGER
NOTE: If a seat equipped with a seat mounted side air bag is being serviced, the Supplemental Restraint System (SRS) must be depowered. Refer to Restraints and Safety Systems &/or Air Bag Systems.
NOTE: The air bag warning lamp illuminates when the Restraints Control Module (RCM) fuse is removed and the ignition switch is ON. This is normal operation and does not indicate an SRS (Supplemental Restraint System) fault.
NOTE: The SRS (Supplemental Restraint System) must be fully operational and free of faults before releasing the vehicle to the customer.
J1 CHECK THE HORIZONTAL MOTOR FOR CORRECT OPERATION
- Operate the passenger power seat forward and rearward.
Does the seat move horizontally?
Yes
GO to J2.
No
GO to J3.
J2 CHECK THE RECLINER MOTOR FOR CORRECT OPERATION
- Recline the passenger backrest forward and rearward.
Does the seat backrest recline forward and rearward?
Yes
GO to J6.
No
GO to J13.
J3 CHECK VOLTAGE TO THE PASSENGER SEAT HORIZONTAL MOTOR
- Ignition OFF.
- Depower the SRS (Supplemental Restraint System). Refer to Supplemental Restraint System (SRS) Depowering and Repowering in the General Procedures portion of Restraints and Safety Systems &/or Air Bag Systems.
- Disconnect: Passenger Seat Side Air Bag Module C313.
- Disconnect: Passenger Seat Motor C3015.
- 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.
- NOTE: During the following step, the voltage being measured changes polarity dependent upon which direction the seat control switch is activated.
Measure the voltage between passenger seat motor C3015-6, circuit CPS38 (GN/BU), harness side and C3015-3, circuit CPS33 (WH), harness side, while operating the seat control switch horizontal adjust forward and rearward.
Is the voltage greater than 10 volts when the seat control switch is operated and 0 volt in the rest position?
Yes
INSTALL a new passenger seat track assembly. REFER to Seat Track . TEST the system for normal operation.
DISCONNECT the battery ground cable. CONNECT passenger seat side air bag module C313. REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.
No
GO to J4.
J4 CHECK HORIZONTAL MOTOR CIRCUIT FOR AN OPEN AND SHORT TO GROUND
- Disconnect: Passenger Seat Control Switch C3190.
- Measure the resistance between:
- passenger seat control switch C3190-9, circuit CPS38 (GN/BU), harness side and passenger seat motor C3015-6, circuit CPS38 (GN/BU), harness side.
- passenger seat control switch C3190-9, circuit CPS38 (GN/BU), harness side and ground.
Is the resistance less than 5 ohms between the passenger seat motor and the passenger seat control switch; and greater than 10,000 ohms between the passenger seat control switch and ground?
Yes
GO to J5.
No
REPAIR the circuit. TEST the system for normal operation.
DISCONNECT the battery ground cable. CONNECT passenger seat side air bag module C313. REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.
J5 CHECK HORIZONTAL MOTOR CIRCUIT FOR AN OPEN AND SHORT TO GROUND
- Measure the resistance between:
- passenger seat control switch C3190-4, circuit CPS33 (WH), harness side and passenger seat motor C3015-3, circuit CPS33 (WH), harness side.
- passenger seat control switch C3190-4, circuit CPS33 (WH), harness side and ground.
Is the resistance less than 5 ohms between the passenger seat motor and the passenger seat control switch; and greater than 10,000 ohms between the passenger seat control switch and ground?
Yes
INSTALL a new passenger seat control switch. REFER to Seat Control Switch . TEST the system for normal operation.
DISCONNECT the battery ground cable. CONNECT passenger seat side air bag module C313. REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.
No
REPAIR the circuit. TEST the system for normal operation.
DISCONNECT the battery ground cable. CONNECT passenger seat side air bag module C313. REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.
J6 DETERMINE THE SEAT HEIGHT ADJUST FAILURE
- Operate the front and rear seat height adjustments.
Does the seat front and rear height adjust up and down?
Yes
If only front height adjust operates, GO to J7.
If only rear height adjust operates, GO to J10.
No
INSTALL a new passenger seat control switch. REFER to Seat Control Switch . TEST the system for normal operation.
DISCONNECT the battery ground cable. CONNECT passenger seat side air bag module C313. REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.
J7 CHECK VOLTAGE TO THE PASSENGER SEAT REAR HEIGHT MOTOR
- Ignition OFF.
- Depower the SRS (Supplemental Restraint System). Refer to Supplemental Restraint System (SRS) Depowering and Repowering in the General Procedures portion of Restraints and Safety Systems &/or Air Bag Systems.
- Disconnect: Passenger Seat Side Air Bag Module C313.
- Disconnect: Passenger Seat Motor C3015.
- 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.
- NOTE: During the following step, the voltage being measured changes polarity dependent upon which direction the seat control switch is activated.
Measure the voltage between passenger seat motor C3015-1, circuit CPS37 (WH/BU), harness side and C3015-4, circuit CPS36 (YE/GY), harness side, while operating the seat control switch rear height adjust up and down.
Is the voltage greater than 10 volts when the seat control switch is operated and 0 volt in the rest position?
Yes
INSTALL a new passenger seat track assembly. REFER to Seat Track . TEST the system for normal operation.
DISCONNECT the battery ground cable. CONNECT passenger seat side air bag module C313. REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.
No
GO to J8.
J8 CHECK REAR HEIGHT MOTOR CIRCUIT FOR AN OPEN AND SHORT TO GROUND
- Disconnect: Passenger Seat Control Switch C3190.
- Measure the resistance between:
- passenger seat control switch C3190-12, circuit CPS37 (WH/BU), harness side and passenger seat motor C3015-1, circuit CPS37 (WH/BU), harness side.
- passenger seat control switch C3190-12, circuit CPS37 (WH/BU), harness side and ground.
Is the resistance less than 5 ohms between the passenger seat motor and the passenger seat control switch; and greater than 10,000 ohms between the passenger seat control switch and ground?
Yes
GO to J9.
No
REPAIR the circuit. TEST the system for normal operation.
DISCONNECT the battery ground cable. CONNECT passenger seat side air bag module C313. REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.
J9 CHECK REAR HEIGHT MOTOR CIRCUIT FOR AN OPEN AND SHORT TO GROUND
- Measure the resistance between:
- passenger seat control switch C3190-1, circuit CPS36 (YE/GY), harness side and passenger seat motor C3015-4, circuit CPS36 (YE/GY), harness side.
- passenger seat control switch C3190-4, circuit CPS36 (YE/GY), harness side and ground.
Is the resistance less than 5 ohms between the passenger seat motor and the passenger seat control switch; and greater than 10,000 ohms between the passenger seat control switch and ground?
Yes
INSTALL a new passenger seat control switch. REFER to Seat Control Switch . TEST the system for normal operation.
DISCONNECT the battery ground cable. CONNECT passenger seat side air bag module C313. REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.
No
REPAIR the circuit. TEST the system for normal operation.
DISCONNECT the battery ground cable. CONNECT passenger seat side air bag module C313. REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.
J10 CHECK VOLTAGE TO THE PASSENGER SEAT FRONT HEIGHT MOTOR
- Ignition OFF.
- Depower the SRS (Supplemental Restraint System). Refer to Supplemental Restraint System (SRS) Depowering and Repowering in the General Procedures portion of Restraints and Safety Systems &/or Air Bag Systems.
- Disconnect: Passenger Seat Side Air Bag Module C313.
- Disconnect: Passenger Seat Motor C3015.
- 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.
- NOTE: During the following step, the voltage being measured changes polarity dependent upon which direction the seat control switch is activated.
Measure the voltage between passenger seat motor C3015-2, circuit CPS35 (VT/GN), harness side and C3015-5, circuit CPS34 (GY/BU), while operating the seat control switch front height adjust up and down.
Is the voltage greater than 10 volts when the seat control switch is operated and 0 volt in the rest position?
Yes
INSTALL a new passenger seat track assembly. REFER to Seat Track . TEST the system for normal operation.
DISCONNECT the battery ground cable. CONNECT passenger seat side air bag module C313. REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.
No
GO to J11.
J11 CHECK FRONT HEIGHT MOTOR CIRCUIT FOR AN OPEN AND SHORT TO GROUND
- Disconnect: Passenger Seat Control Switch C3190.
- Measure the resistance between:
- passenger seat control switch C3190-6, circuit CPS35 (VT/GN), harness side and passenger seat motor C3015-2, circuit CPS35 (VT/GN), harness side.
- passenger seat control switch C3190-6, circuit CPS35 (VT/GN), harness side and ground.
Is the resistance less than 5 ohms between the passenger seat motor and the passenger seat control switch; and greater than 10,000 ohms between the passenger seat control switch and ground?
Yes
GO to J12.
No
REPAIR the circuit. TEST the system for normal operation.
DISCONNECT the battery ground cable. CONNECT passenger seat side air bag module C313. REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.
J12 CHECK FRONT HEIGHT MOTOR CIRCUIT FOR AN OPEN AND SHORT TO GROUND
- Measure the resistance between:
- passenger seat control switch C3190-2, circuit CPS34 (GY/BU) harness side, and passenger seat motor C3015-5, circuit CPS34 (GY/BU), harness side.
- passenger seat control switch C3190-2, circuit CPS34 (GY/BU), harness side and ground.
Is the resistance less than 5 ohms between the passenger seat motor and the passenger seat control switch; and greater than 10,000 ohms between the passenger seat control switch and ground?
Yes
INSTALL a new passenger seat control switch. REFER to Seat Control Switch . TEST the system for normal operation.
DISCONNECT the battery ground cable. CONNECT passenger seat side air bag module C313. REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.
No
REPAIR the circuit. TEST the system for normal operation.
DISCONNECT the battery ground cable. CONNECT passenger seat side air bag module C313. REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.
J13 CHECK VOLTAGE TO THE PASSENGER SEAT RECLINER MOTOR
- Ignition OFF.
- Depower the SRS (Supplemental Restraint System). Refer to Supplemental Restraint System (SRS) Depowering and Repowering in the General Procedures portion of Restraints and Safety Systems &/or Air Bag Systems.
- Disconnect: Passenger Seat Side Air Bag Module C313.
- Disconnect: Passenger Seat Recliner Motor C3189.
- 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.
- NOTE: During the following step, the voltage being measured changes polarity dependent upon which direction the seat control switch is activated.
Measure the voltage between passenger seat recliner motor C3189-1, circuit CPS39 (GY/YE), harness side and C3189-5, circuit CPS40 (VT/GY), harness side, while operating the seat control switch recline adjust forward and rearward.
Is the voltage greater than 10 volts when the seat control switch is operated and 0 volt in the rest position?
Yes
INSTALL a new passenger seat recliner motor. REFER to Seat Recliner Motor . TEST the system for normal operation.
DISCONNECT the battery ground cable. CONNECT passenger seat side air bag module C313. REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.
No
GO to J14.
J14 CHECK RECLINER MOTOR CIRCUIT FOR AN OPEN AND SHORT TO GROUND
- Disconnect: Passenger Seat Control Switch C3190.
- Measure the resistance between:
- passenger seat control switch C3190-11, circuit CPS39 (GY/YE), harness side and passenger seat recliner motor C3189-1, circuit CPS39 (GY/YE), harness side.
- passenger seat control switch C3190-11, circuit CPS39 (GY/YE), harness side and ground.
Is the resistance less than 5 ohms between the passenger seat recliner motor and the passenger seat control switch; and greater than 10,000 ohms between the passenger seat control switch and ground?
Yes
GO to J15.
No
REPAIR the circuit. TEST the system for normal operation.
DISCONNECT the battery ground cable. CONNECT passenger seat side air bag module C313. REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.
J15 CHECK RECLINER MOTOR CIRCUIT FOR AN OPEN AND SHORT TO GROUND
- Measure the resistance between:
- passenger seat control switch C3190-8, circuit CPS40 (VT/GY) harness side, and passenger seat recliner motor C3189-5, circuit CPS40 (VT/GY), harness side.
- passenger seat control switch C3190-8, circuit CPS40 (VT/GY), harness side and ground.
Is the resistance less than 5 ohms between the passenger seat recliner motor and the passenger seat control switch; and greater than 10,000 ohms between the seat control switch and ground?
Yes
INSTALL a new passenger seat control switch. REFER to Seat Control Switch . TEST the system for normal operation.
DISCONNECT the battery ground cable. CONNECT passenger seat side air bag module C313. REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.
No
REPAIR the circuit. TEST the system for normal operation.
DISCONNECT the battery ground cable. CONNECT passenger seat side air bag module C313. REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.