Pinpoint Test F: The Power Seat Does Not Move Horizontally/Vertically/Recline - Driver, With Power Recline
Seats
Pinpoint Test F: The Power Seat Does Not Move Horizontally/Vertically/Recline - Driver, With Power Recline
Refer to Wiring Diagram Set 120, Power Seats for schematic and connector information Electrical Diagrams.
Normal Operation
When the driver 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). There is an additional motor in the seat recliner mechanism to move the seat backrest forward and rearward. If a new seat track motor needs to be installed, it is necessary to install an entire seat track assembly.
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Seat control switch
- Seat track
- Power seat motor
PINPOINT TEST F : THE POWER SEAT DOES NOT MOVE HORIZONTALLY/VERTICALLY/RECLINE - DRIVER, WITH RECLINE
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.
F1 CHECK THE HORIZONTAL MOTOR FOR CORRECT OPERATION
- Operate the driver seat forward and rearward.
Will the seat move horizontally?
Yes
GO to F2.
No
GO to F3.
F2 CHECK THE RECLINER MOTOR FOR CORRECT OPERATION
- Recline the driver backrest forward and rearward.
Will the seat backrest recline forward and rearward?
Yes
GO to F6.
No
GO to F13.
F3 CHECK FOR VOLTAGE TO THE DRIVER 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: Driver Seat Side Air Bag C328.
- Disconnect: Driver Seat Horizontal Motor C362.
- 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 driver seat horizontal motor C362-1, circuit CPS28 (GN), harness side and C362-2, circuit CPS23 (GN/VT), harness side, while pushing the driver seat control switch 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 seat track assembly. REFER to Seat Track . TEST the system for normal operation.
DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C328.
REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.
No
GO to F4.
F4 CHECK THE HORIZONTAL MOTOR CIRCUIT FOR AN OPEN
- Disconnect: Driver Seat Control Switch C3016.
- Measure the resistance between driver seat control switch C3016-9, circuit CPS28 (GN), harness side and driver seat horizontal motor C362-1, circuit CPS28 (GN), harness side.
Is the resistance less than 5 ohms?
Yes
GO to F5.
No
REPAIR the circuit. TEST the system for normal operation.
DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C328.
REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.
F5 CHECK THE HORIZONTAL MOTOR CIRCUIT FOR AN OPEN
- Measure the resistance between driver seat control switch C3016-4, circuit CPS23 (GN/VT), harness side and driver seat horizontal motor C362-2, circuit CPS23 (GN/VT), harness side.
Is the resistance less than 5 ohms?
Yes
INSTALL a new seat control switch. REFER to Seat Control Switch - Front . TEST the system for normal operation.
DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C328.
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 driver seat side air bag module C328.
REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.
F6 DETERMINE THE SEAT HEIGHT ADJUST FAILURE
- Operate the seat front and rear height adjustments.
Does the seat front and rear height adjust up and down?
Yes
If only the front height adjust motor operates, GO to F7.
If only the rear height adjust motor operates, GO to F10.
No
INSTALL a new seat control switch. REFER to Seat Control Switch - Front . TEST the system for normal operation.
DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C328.
REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.
F7 CHECK VOLTAGE TO THE 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: Driver Seat Side Air Bag C328.
- Disconnect: Driver Seat Rear Height Motor C363.
- 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 driver seat rear height motor C363-1, circuit CPS27 (BU/BN), harness side and C363-2, circuit CPS26 (YE/BU), harness side, while pressing the rear height adjust switch 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 seat track assembly. REFER to Seat Track . TEST the system for normal operation.
DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C328.
REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.
No
GO to F8.
F8 CHECK THE REAR SEAT HEIGHT MOTOR CIRCUIT FOR AN OPEN
- Disconnect: Driver Seat Control Switch C3016.
- Measure the resistance between driver seat control switch C3016-1, circuit CPS27 (BU/BN), harness side and driver seat rear height motor C363-1, circuit CPS27 (BU/BN), harness side.
Is the resistance less than 5 ohms?
Yes
GO to F9.
No
REPAIR the circuit. TEST the system for normal operation.
DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C328.
REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.
F9 CHECK THE REAR SEAT HEIGHT MOTOR CIRCUIT FOR AN OPEN
- Measure the resistance between driver seat control switch C3016-12, circuit CPS26 (YE/BU), harness side and driver seat rear height motor C363-2, circuit CPS26 (YE/BU), harness side.
Is the resistance less than 5 ohms?
Yes
INSTALL a new seat control switch. REFER to Seat Control Switch - Front . TEST the system for normal operation.
DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C328.
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 driver seat side air bag module C328.
REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.
F10 CHECK FOR VOLTAGE TO THE DRIVER 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: Driver Seat Side Air Bag C328.
- Disconnect: Driver Seat Front Height Motor C382.
- 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 driver seat front height motor C382-1, circuit CPS25 (WH/VT), harness side and C382-2, circuit CPS24 (GY), while pressing the front height adjust switch 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 seat track assembly. REFER to Seat Track . TEST the system for normal operation.
DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C328.
REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.
No
GO to F11.
F11 CHECK THE FRONT HEIGHT MOTOR CIRCUIT FOR AN OPEN
- Disconnect: Driver Seat Control Switch C3016.
- Measure the resistance between driver seat control switch C3016-2, circuit CPS25 (WH/VT), harness side and driver seat front height motor C382-1, circuit CPS25 (WH/VT), harness side.
Is the resistance less than 5 ohms?
Yes
GO to F12.
No
REPAIR the circuit. TEST the system for normal operation.
DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C328.
REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.
F12 CHECK THE FRONT HEIGHT MOTOR CIRCUIT FOR AN OPEN
- Measure the resistance between driver seat control switch C3016-6, circuit CPS24 (GY) harness side, and driver seat front height motor C382-2, circuit CPS24 (GY), harness side.
Is the resistance less than 5 ohms?
Yes
INSTALL a new seat control switch. REFER to Seat Control Switch - Front . TEST the system for normal operation.
DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C328.
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 driver seat side air bag module C328.
REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.
F13 CHECK FOR VOLTAGE TO THE DRIVER 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: Driver Seat Side Air Bag C328.
- Disconnect: Driver Seat Recliner Motor C368.
- 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 driver seat recliner motor C368-1, circuit CPS30 (VT/BN), harness side and C368-2, circuit CPS29 (WH/BN), while pushing the recline switch forward and rearward.
Is the voltage greater than 10 volts when the seat control switch is operated in both directions and 0 volt in the rest position?
Yes
INSTALL a new seat recliner motor. REFER to Seat Recliner Motor . TEST the system for normal operation.
DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C328.
REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.
No
GO to F14.
F14 CHECK THE RECLINER MOTOR CIRCUIT FOR AN OPEN
- Disconnect: Driver Seat Control Switch C3016.
- Measure the resistance between driver seat control switch C3016-11, circuit CPS29 (WH/BN), harness side and driver seat recliner motor C368-2, circuit CPS29 (WH/BN), harness side.
Is the resistance less than 5 ohms?
Yes
GO to F15.
No
REPAIR the circuit. TEST the system for normal operation.
DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C328.
REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.
F15 CHECK THE RECLINER MOTOR CIRCUIT FOR AN OPEN
- Measure the resistance between driver seat control switch C3016-8, circuit CPS30 (VT/BN) harness side, and driver seat recliner motor C368-1, circuit CPS30 (VT/BN), harness side.
Is the resistance less than 5 ohms between the driver seat recliner motor and the driver seat control switch?
Yes
INSTALL a new seat control switch. REFER to Seat Control Switch - Front . TEST the system for normal operation.
DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C328.
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 driver seat side air bag module C328.
REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.