Pinpoint Test G: The Power Seat Does Not Move Horizontally/Vertically - Passenger, Without Power Recline
Seats
Pinpoint Test G: The Power Seat Does Not Move Horizontally/Vertically - Passenger, Without Power Recline
Refer to Wiring Diagram Set 120, Power Seats for schematic and connector information Electrical Diagrams.
Normal Operation
When the passenger seat control switch is activated, voltage and ground is supplied to the applicable seat track motor or seat recliner 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 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 G : THE POWER SEAT DOES NOT MOVE HORIZONTALLY/VERTICALLY - PASSENGER, WITHOUT POWER 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.
G1 CHECK THE HORIZONTAL MOTOR FOR CORRECT OPERATION
- Operate the passenger seat forward and rearward.
Will the seat move horizontally?
Yes
GO to G5.
No
GO to G2.
G2 CHECK FOR 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 C327.
- Disconnect: Passenger Seat Horizontal Motor C332.
- 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 horizontal motor C332-1, circuit CPS38 (GN/BU), harness side and C332-2, circuit CPS33 (WH), harness side, while pushing the passenger 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 passenger seat side air bag module C327.
REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.
No
GO to G3.
G3 CHECK THE HORIZONTAL MOTOR CIRCUIT FOR AN OPEN
- Disconnect: Passenger Seat Control Switch C355.
- Measure the resistance between passenger seat control switch C355-6, circuit CPS38 (GN/BU), harness side and passenger seat horizontal motor C332-1, circuit CPS38 (GN/BU), harness side.
Is the resistance less than 5 ohms between the passenger seat horizontal motor and the passenger seat control switch?
Yes
GO to G4.
No
REPAIR the circuit. TEST the system for normal operation.
DISCONNECT the battery ground cable. CONNECT passenger seat side air bag module C327.
REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.
G4 CHECK THE HORIZONTAL MOTOR CIRCUIT FOR AN OPEN
- Measure the resistance between passenger seat control switch C355-3, circuit CPS33 (WH), harness side and passenger seat horizontal motor C332-2, circuit CPS33 (WH), harness side.
Is the resistance less than 5 ohms between the passenger seat horizontal motor and the passenger 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 passenger seat side air bag module C327.
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 C327.
REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.
G5 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 G6.
If only the rear height adjust motor operates, GO to G9.
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 passenger seat side air bag module C327.
REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.
G6 CHECK FOR 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 C327.
- Disconnect: Passenger Seat Rear Height Motor C3075.
- 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 rear height motor C3075-2, circuit CPS36 (YE/GY), harness side and C3075-1, circuit CPS37 (WH/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 passenger seat side air bag module C327.
REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.
No
GO to G7.
G7 CHECK THE REAR HEIGHT MOTOR CIRCUIT FOR AN OPEN
- Disconnect: Passenger Seat Control Switch C355.
- Measure the resistance between passenger seat control switch C355-5, circuit CPS36 (YE/GY), harness side and passenger seat rear height motor C3075-2, circuit CPS36 (YE/GY), harness side.
Is the resistance less than 5 ohms between the passenger seat rear height motor and the passenger seat control switch?
Yes
GO to G8.
No
REPAIR the circuit. TEST the system for normal operation.
DISCONNECT the battery ground cable. CONNECT passenger seat side air bag module C327.
REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.
G8 CHECK THE REAR HEIGHT MOTOR CIRCUIT FOR AN OPEN
- Measure the resistance between passenger seat control switch C355-7, circuit CPS37 (WH/BU), harness side and passenger seat rear height motor C3075-1, circuit CPS37 (WH/BU), harness side.
Is the resistance less than 5 ohms between the passenger seat rear height motor and the passenger 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 passenger seat side air bag module C327.
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 C327.
REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.
G9 CHECK FOR 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 C327.
- Disconnect: Passenger Seat Front Height Motor C3074.
- 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 front height motor C3074-1, circuit CPS35 (VT/GN), harness side and C3074-2, circuit CPS34 (GY/BU), 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 passenger seat side air bag module C327.
REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.
No
GO to G10.
G10 CHECK THE FRONT HEIGHT MOTOR CIRCUIT FOR AN OPEN
- Disconnect: Passenger Seat Control Switch C355.
- Measure the resistance between passenger seat control switch C355-1, circuit CPS34 (GY/BU), harness side and passenger seat front height motor C3074-2, circuit CPS34 (GY/BU), harness side.
Is the resistance less than 5 ohms between the passenger seat front height motor and the passenger seat control switch?
Yes
GO to G11.
No
REPAIR the circuit. TEST the system for normal operation.
DISCONNECT the battery ground cable. CONNECT passenger seat side air bag module C327.
REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.
G11 CHECK THE FRONT HEIGHT MOTOR CIRCUIT FOR AN OPEN
- Measure the resistance between passenger seat control switch C355-8, circuit CPS35 (VT/GN), harness side, and passenger seat front height motor C3074-1, circuit CPS35 (VT/GN), harness side.
Is the resistance less than 5 ohms between the passenger seat front height motor and the passenger 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 passenger seat side air bag module C327.
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 C327.
REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.