Pinpoint Test H: The Power Seat Does Not Move Horizontally/Vertically/Recline - Driver

Seating

Pinpoint Test H: The Power Seat Does Not Move Horizontally/Vertically/Recline - Driver

Refer to Wiring Diagram Set 120, Power Seats for schematic and connector information. Diagrams By Number

Normal Operation

The seat control switch supplies voltage and ground to a power seat track motor or power recliner motor to move the seat or backrest. There are 3 power 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 power 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

- Power seat motor (seat track)

- Power recliner motor

PINPOINT TEST H : THE POWER SEAT DOES NOT MOVE HORIZONTALLY/VERTICALLY/RECLINE - DRIVER

NOTE: The air bag warning indicator illuminates when the correct Restraints Control Module (RCM) fuse is removed and the ignition switch is ON.

NOTE: The Supplemental Restraint System (SRS) must be fully operational and free of faults before releasing the vehicle to the customer.

H1 CHECK THE HORIZONTAL MOTOR FOR CORRECT OPERATION

- Operate the driver power seat forward and rearward.

Will the seat move horizontally?

Yes
GO to H2.

No
GO to H3.

H2 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 H6.

No
GO to H13.

H3 CHECK FOR VOLTAGE TO THE 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 C3051.

- Disconnect: Driver Seat Safety Belt Buckle Pretensioner C3065.

- 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.

- Measure the voltage between horizontal motor C362-1, circuit CPS23 (GN/VT), harness side and C362-2, circuit CPS28 (GN), 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 in both directions and 0 volt in the rest position?

Yes
INSTALL a new driver seat track assembly. REFER to Seat Track - Front . TEST the system for normal operation.

DISCONNECT the battery ground cable.

CONNECT driver seat safety belt buckle pretensioner C3065.

CONNECT driver seat side air bag C3051.

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

No
GO to H4.

H4 CHECK THE HORIZONTAL MOTOR CIRCUIT FOR AN OPEN

- Disconnect: Driver Seat Control Switch C369.

- Measure the resistance between seat control switch C369-4, circuit CPS23 (GN/VT), harness side and driver seat horizontal motor C362-1, circuit CPS23 (GN/VT), harness side.

Is the resistance less than 5 ohms?

Yes
GO to H5.

No
REPAIR the circuit. TEST the system for normal operation.

DISCONNECT the battery ground cable.

CONNECT driver seat safety belt buckle pretensioner C3065.

CONNECT driver seat side air bag C3051.

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

H5 CHECK THE HORIZONTAL MOTOR CIRCUIT FOR AN OPEN

- Measure the resistance between seat control switch C369-9, circuit CPS28 (GN), harness side and driver seat horizontal motor C362-2, circuit CPS28 (GN), harness side.

Is the resistance less than 5 ohms?

Yes
INSTALL a new driver seat control switch. REFER to Seat Control Switch - Front . TEST the system for normal operation.

DISCONNECT the battery ground cable.

CONNECT driver seat safety belt buckle pretensioner C3065.

CONNECT driver seat side air bag C3051.

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 safety belt buckle pretensioner C3065.

CONNECT driver seat side air bag C3051.

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

H6 DETERMINE THE SEAT HEIGHT ADJUST FAILURE

- Adjust both front and rear seat height up and down to determine the failure.

Does the seat front or rear height adjust up and down?

Yes
If only front height adjustment operates, GO to H7.

If only rear height adjustment operates, GO to H10.

No
INSTALL a new driver seat control switch. REFER to Seat Control Switch - Front . TEST the system for normal operation.

DISCONNECT the battery ground cable.

CONNECT driver seat safety belt buckle pretensioner C3065.

CONNECT driver seat side air bag C3051.

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

H7 CHECK FOR 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 C3051.

- Disconnect: Driver Seat Safety Belt Buckle Pretensioner C3065.

- 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.

- Measure the voltage between rear height motor C363-5, circuit CPS26 (YE/BU), harness side and C363-1, circuit CPS27 (BU/BN), 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 in both directions and 0 volt in the rest position?

Yes
INSTALL a new driver seat track assembly. REFER to Seat Track - Front . TEST the system for normal operation.

DISCONNECT the battery ground cable.

CONNECT driver seat safety belt buckle pretensioner C3065.

CONNECT driver seat side air bag C3051.

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

No
GO to H8.

H8 CHECK THE REAR HEIGHT MOTOR CIRCUIT FOR AN OPEN

- Disconnect: Driver Seat Control Switch C369.

- Measure the resistance between seat control switch C369-1, 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 H9.

No
REPAIR the circuit. TEST the system for normal operation.

DISCONNECT the battery ground cable.

CONNECT driver seat safety belt buckle pretensioner C3065.

CONNECT driver seat side air bag C3051.

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

H9 CHECK THE REAR HEIGHT MOTOR CIRCUIT FOR AN OPEN

- Measure the resistance between driver seat control switch C369-12, circuit CPS26 (YE/BU), harness side and driver seat rear height motor C363-5, circuit CPS26 (YE/BU), harness side.

Is the resistance less than 5 ohms?

Yes
INSTALL a new driver seat control switch. REFER to Seat Control Switch - Front . TEST the system for normal operation.

DISCONNECT the battery ground cable.

CONNECT driver seat safety belt buckle pretensioner C3065.

CONNECT driver seat side air bag C3051.

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 safety belt buckle pretensioner C3065.

CONNECT driver seat side air bag C3051.

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

H10 CHECK FOR VOLTAGE TO THE 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 C3051.

- Disconnect: Driver Seat Safety Belt Buckle Pretensioner C3065.

- 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.

- Measure the voltage between front height motor C382-1, circuit CPS24 (GY), harness side and C382-2, circuit CPS25 (WH/VT), while pushing 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 driver seat track assembly. REFER to Seat Track - Front . TEST the system for normal operation.

DISCONNECT the battery ground cable.

CONNECT driver seat safety belt buckle pretensioner C3065.

CONNECT driver seat side air bag C3051.

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

No
GO to H11.

H11 CHECK THE FRONT HEIGHT MOTOR CIRCUIT FOR AN OPEN

- Disconnect: Driver Seat Control Switch C369.

- Measure the resistance between seat control switch C369-2, circuit CPS25 (WH/VT), harness side and driver seat front height motor C382-2, circuit CPS25 (WH/VT), harness side.

Is the resistance less than 5 ohms?

Yes
GO to H12.

No
REPAIR the circuit. TEST the system for normal operation.

DISCONNECT the battery ground cable.

CONNECT driver seat safety belt buckle pretensioner C3065.

CONNECT driver seat side air bag C3051.

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

H12 CHECK THE FRONT HEIGHT MOTOR CIRCUIT FOR AN OPEN

- Measure the resistance between seat control switch C369-6, circuit CPS24 (GY) harness side, and driver seat front height motor C382-1, circuit CPS24 (GY), harness side.

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 driver seat recliner motor. REFER to Seat Recliner Motor . TEST the system for normal operation.

DISCONNECT the battery ground cable.

CONNECT driver seat safety belt buckle pretensioner C3065.

CONNECT driver seat side air bag C3051.

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

No
GO to H14.

H14 CHECK THE RECLINER MOTOR CIRCUIT FOR AN OPEN

- Disconnect: Driver Seat Control Switch C369.

- Measure the resistance between seat control switch C369-8, circuit CPS30 (VT/BN), harness side and driver seat recliner motor C3187-3, circuit CPS08 (VT/OG), harness side.

Is the resistance less than 5 ohms?

Yes
GO to H15.

No
REPAIR the circuit. TEST the system for normal operation.

DISCONNECT the battery ground cable.

CONNECT driver seat safety belt buckle pretensioner C3065.

CONNECT driver seat side air bag C3051.

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

H15 CHECK THE RECLINER MOTOR CIRCUIT FOR AN OPEN

- Measure the resistance between seat control switch C369-11, circuit CPS29 (WH/BN) harness side, and driver seat recliner motor C3187-1, circuit CPS07 (GY/BN), harness side.