Pinpoint Test D: The Power Seat Does Not Move Horizontally/Vertically/Recline - Passenger

Seats

Pinpoint Test D: The Power Seat Does Not Move Horizontally/Vertically/Recline - Passenger

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). 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 D : THE POWER SEAT DOES NOT MOVE HORIZONTALLY/VERTICALLY/RECLINE - PASSENGER

NOTE:
If a seat equipped with a seat mounted side air bag is being repaired, 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.

D1 CHECK THE HORIZONTAL MOTOR FOR CORRECT OPERATION

- Operate the passenger power seat forward and rearward.

Will the seat move horizontally?

Yes
GO to D2.
No
GO to D3.

D2 CHECK THE RECLINER MOTOR FOR CORRECT OPERATION

- Recline the passenger backrest forward and rearward.

Will the seat backrest recline forward and rearward?

Yes
GO to D6.
No
GO to D13.

D3 CHECK VOLTAGE TO THE HORIZONTAL MOTOR

- Ignition OFF.

- Depower the SRS (Supplemental Restraint System). Refer to Restraints and Safety Systems &/or Air Bag Systems.

- Disconnect: Passenger Seat Side Air Bag Module C339.

- 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 pressing the passenger seat control 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 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 C339.

REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.
No
GO to D4.

D4 CHECK THE HORIZONTAL MOTOR CIRCUIT FOR AN OPEN

- Disconnect: Passenger Seat Control Switch C330.

- Measure the resistance between passenger seat control switch C330-9, 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?

Yes
GO to D5.
No
REPAIR the circuit. TEST the system for normal operation.

DISCONNECT the battery ground cable.

CONNECT passenger seat side air bag module C339.

REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.

D5 CHECK THE HORIZONTAL MOTOR CIRCUIT FOR AN OPEN

- Measure the resistance between passenger seat control switch C330-4, circuit CPS33 (WH), harness side and passenger seat horizontal motor C332-2, circuit CPS33 (WH), harness side.

Is the resistance less than 5 ohms?

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 C339.

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 C339.

REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.

D6 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 D7.

If only rear height adjust operates, GO to D10.
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 C339.

REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.

D7 CHECK VOLTAGE TO THE REAR HEIGHT MOTOR

- Ignition OFF.

- Depower the SRS (Supplemental Restraint System). Refer to Restraints and Safety Systems &/or Air Bag Systems.

- Disconnect: Passenger Seat Side Air Bag Module C339.

- Disconnect: 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 C3075-5, circuit CPS36 (YE/GY), harness side and C3075-1, circuit CPS37 (WH/BU), harness side, while depressing the seat control switch rear height adjust up and down.

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 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 C339.

REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.
No
GO to D8.

D8 CHECK THE REAR SEAT HEIGHT MOTOR FOR AN OPEN

- Disconnect: Passenger Seat Control Switch C330.

- Measure the resistance between passenger seat control switch C330-12, 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?

Yes
GO to D9.
No
REPAIR the circuit. TEST the system for normal operation.

DISCONNECT the battery ground cable.

CONNECT passenger seat side air bag module C339.

REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.

D9 CHECK THE REAR SEAT HEIGHT MOTOR CIRCUIT FOR AN OPEN

- Measure the resistance between passenger seat control switch C330-1, circuit CPS36 (YE/GY), harness side and passenger seat rear height motor C3075-5, circuit CPS36 (YE/GY), harness side.

Is the resistance less than 5 ohms?

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 C339.

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 C339.

REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.

D10 CHECK VOLTAGE TO THE FRONT HEIGHT MOTOR

- Ignition OFF.

- Depower the SRS (Supplemental Restraint System). Refer to Restraints and Safety Systems &/or Air Bag Systems.

- Disconnect: Passenger Seat Side Air Bag Module C339.

- 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 seat control switch front height adjust up and down.

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 track assembly. REFER to Seat Track . TEST the system for normal operation.

DISCONNECT the battery ground cable.

CONNECT passenger seat side air bag module C339.

REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.
No
GO to D11.

D11 CHECK THE FRONT HEIGHT MOTOR CIRCUIT FOR AN OPEN

- Disconnect: Passenger Seat Control Switch C330.

- Measure the resistance between passenger seat control switch C330-6, circuit CPS35 (VT/GN), harness side and front height motor C3074-1, circuit CPS35 (VT/GN), harness side.

Is the resistance less than 5 ohms?

Yes
GO to D12.
No
REPAIR the circuit. TEST the system for normal operation.

DISCONNECT the battery ground cable.

CONNECT passenger seat side air bag module C339.

REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.

D12 CHECK THE FRONT HEIGHT MOTOR CIRCUIT FOR AN OPEN

- Measure the resistance between passenger seat control switch C330-2, circuit CPS34 (GY/BU) harness side, and front height motor C3074-2, circuit CPS34 (GY/BU), harness side.

Is the resistance less than 5 ohms?

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 C339.

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 C339.

REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.

D13 CHECK VOLTAGE TO THE SEAT RECLINER MOTOR

- Ignition OFF.

- Depower the SRS (Supplemental Restraint System). Refer to Restraints and Safety Systems &/or Air Bag Systems.

- Disconnect: Passenger Seat Side Air Bag Module C339.

- 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 C3189-3, circuit CPS08 (VT/OG), harness side and C3189-1, circuit CPS07 (GY/BN), while pressing 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 passenger seat side air bag module C339.

REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.
No
GO to D14.

D14 CHECK THE RECLINER MOTOR CIRCUIT FOR AN OPEN

- Disconnect: Passenger Seat Control Switch C330.

- Measure the resistance between passenger seat control switch C330-11, circuit CPS39 (GY/YE), harness side and seat recliner motor C3189-1, circuit CPS07 (GY/BN), harness side.

Is the resistance less than 5 ohms?

Yes
GO to D15.
No
REPAIR the circuit. TEST the system for normal operation.

DISCONNECT the battery ground cable.

CONNECT passenger seat side air bag module C339.

REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.

D15 CHECK THE RECLINER MOTOR CIRCUIT FOR AN OPEN

- Measure the resistance between passenger seat control switch C330-8, circuit CPS40 (VT/GY) harness side, and seat recliner motor C3189-3, circuit CPS08 (VT/OG), harness side.