Pinpoint Test I: The Power Seat Does Not Move Horizontally/Vertically/Recline - Driver, With Massage

Seating

Pinpoint Test I: The Power Seat Does Not Move Horizontally/Vertically/Recline - Driver, With Massage

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

- Seat track motor (seat track assembly)

- Power recliner motor

PINPOINT TEST I : THE POWER SEAT DOES NOT MOVE HORIZONTALLY/VERTICALLY/RECLINE - DRIVER, WITH MASSAGE

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

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

I1 CHECK THE HORIZONTAL MOTOR FOR CORRECT OPERATION

- Operate the power seat forward and backward.

Will the seat move horizontally?

Yes
GO to I2.

No
GO to I3.

I2 CHECK THE RECLINER MOTOR FOR CORRECT OPERATION

- Recline the backrest forward and backward.

Will the backrest pivot forward and backward?

Yes
GO to I6.

No
GO to I13.

I3 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 depressing the seat control switch forward and backward.

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 I4.

I4 CHECK THE HORIZONTAL MOTOR CIRCUIT FOR AN OPEN

- Disconnect: Driver Seat Control Switch C3387A.

- Measure the resistance between seat control switch C3387A-2, circuit CPS23 (GN/VT), harness side and horizontal motor C362-1, circuit CPS23 (GN/VT), harness side.

Is the resistance less than 5 ohms?

Yes
GO to I5.

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.

I5 CHECK THE HORIZONTAL MOTOR CIRCUIT FOR AN OPEN

- Measure the resistance between seat control switch C3387A-4, circuit CPS28 (GN), harness side and 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.

I6 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 I7.

If only rear height adjust operates, GO to I10.

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.

I7 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 C363-1, circuit CPS27 (BU/BN), harness side and C363-5, circuit CPS26 (YE/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 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 I8.

I8 CHECK THE REAR HEIGHT MOTOR CIRCUIT FOR AN OPEN

- Disconnect: Driver Seat Control Switch C3387A.

- Measure the resistance between seat control switch C3387A-3, circuit CPS27 (BU/BN), harness side and rear height motor C363-1, circuit CPS27 (BU/BN), harness side.

Is the resistance less than 5 ohms?

Yes
GO to I9.

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.

I9 CHECK THE REAR HEIGHT MOTOR CIRCUIT FOR AN OPEN

- Measure the resistance between seat control switch C3387A-5, circuit CPS26 (YE/BU), harness side and 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.

I10 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 depressing 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 I11.

I11 CHECK THE FRONT HEIGHT MOTOR CIRCUIT FOR AN OPEN

- Disconnect: Driver Seat Control Switch C3387A.

- Measure the resistance between seat control switch C3387A-11, circuit CPS25 (WH/VT), harness side and front height motor C382-2, circuit CPS25 (WH/VT), harness side.

Is the resistance less than 5 ohms?

Yes
GO to I12.

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.

I12 CHECK THE FRONT HEIGHT MOTOR CIRCUIT FOR AN OPEN

- Measure the resistance between seat control switch C3387A-10, circuit CPS24 (GY) harness side, and front height motor C382-1, circuit CPS24 (GY), 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.

I13 CHECK FOR VOLTAGE TO THE 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 C3051.

- Disconnect: Driver Seat Safety Belt Buckle Pretensioner C3065.

- Disconnect: Driver Seat Recliner Motor C3187.

- 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 recliner motor C3187-3, circuit CPS08 (VT/OG), harness side and C3187-1, circuit CPS07 (GY/BN), while depressing the seat control switch forward and backward.

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 I14.

I14 CHECK THE RECLINER MOTOR CIRCUITS FOR AN OPEN

- Disconnect: Seat Control Switch C3387A.

- Measure the resistance between seat control switch C3387A-9, circuit CPS29 (WH/BN), harness side and driver seat recliner motor C3187-1, circuit CPS07 (GY/BN), harness side.

Is the resistance less than 5 ohms?

Yes
GO to I15.

No
REPAIR the affected 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.

I15 CHECK THE RECLINER MOTOR CIRCUITS FOR AN OPEN

- Measure the resistance between seat control switch C3387A-8, circuit CPS30 (VT/BN) harness side, and recliner motor C3187-3, circuit CPS08 (VT/OG), harness side.