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

Seats

Pinpoint Tests

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

Refer to Wiring Diagrams Seating for schematic and connector information. Diagrams By Number

Normal Operation

The seat control switch supplies battery voltage and ground to 1 of 3 power seat track motors through horizontal motor circuits CPS23 (GN/VT) and CPS28 (GN), front height motor circuits CPS24 (GY) and CPS25 (WH/VT) or rear height motor circuits CPS26 (YE/BU) and CPS27 (BU/BN) to move the seat in the desired direction.

This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Seat control switch
- Seat track motor

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

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C1 CHECK THE HORIZONTAL MOTOR FOR CORRECT OPERATION

- Operate the seat control switch forward and rearward.
- Does the seat move horizontally?

Yes
GO to C2.

No
GO to C9.

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C2 DETERMINE THE SEAT HEIGHT ADJUST FAILURE

- Operate the front and rear seat height adjustments.
- Does the seat front or rear height adjust up and down?

Yes
If only the front height adjust operates, GO to C3.

If only the rear height adjust operates, GO to C6.

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

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C3 CHECK THE VOLTAGE TO THE REAR HEIGHT MOTOR

- Ignition OFF.
- Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering in the General Procedures portion of Supplemental Restraint System Supplemental Restraint System (SRS) Depowering and Repowering.
- Disconnect: Driver Seat Side Air Bag C367.
- Disconnect: Driver Power Seat Motor Assembly C353.

- 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. Refer to Battery, Mounting and Cables Service and Repair.
- Measure the voltage between driver power seat motor assembly C353-8, circuit CPS26 (YE/BU) and C353-2, circuit CPS27 (BU/BN), harness side, while operating the seat control switch rear height up and down.

- Is the voltage greater than 10 volts when the seat control switch is toggled in both directions and 0 volt in the rest position?

Yes
INSTALL a new power seat track. REFER to Seat Track - Power Seat Track - Power. TEST the system for normal operation.

DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C367. REPOWER the SRS. REFER to Supplemental Restraint System Supplemental Restraint System (SRS) Depowering and Repowering.

No
GO to C4.

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C4 CHECK THE REAR HEIGHT MOTOR CIRCUIT FOR AN OPEN

- Disconnect: Driver Seat Control Switch C360.
- Measure the resistance between driver seat control switch C360-5, circuit CPS26 (YE/BU), harness side and driver power seat motor assembly C353-8, circuit CPS26 (YE/BU), harness side.

- Is the resistance less than 5 ohms?

Yes
GO to C5.

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

DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C367. REPOWER the SRS. REFER to Supplemental Restraint System Supplemental Restraint System (SRS) Depowering and Repowering.

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C5 CHECK THE REAR HEIGHT MOTOR CIRCUIT FOR AN OPEN

- Measure the resistance between driver seat control switch C360-7, circuit CPS27 (BU/BN), harness side and driver power seat motor assembly C353-2, circuit CPS27 (BU/BN), harness side.

- Is the resistance less than 5 ohms?

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

DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C367. REPOWER the SRS. REFER to Supplemental Restraint System Supplemental Restraint System (SRS) Depowering and Repowering.

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

DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C367. REPOWER the SRS. REFER to Supplemental Restraint System Supplemental Restraint System (SRS) Depowering and Repowering.

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C6 CHECK FOR VOLTAGE TO THE FRONT HEIGHT MOTOR

- Ignition OFF.
- Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering in the General Procedures portion of Supplemental Restraint System Supplemental Restraint System (SRS) Depowering and Repowering.
- Disconnect: Driver Seat Side Air Bag C367.
- Disconnect: Driver Power Seat Motor Assembly C353.

- 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. Refer to Battery, Mounting and Cables Service and Repair.
- Measure the voltage between driver power seat motor assembly C353-1, circuit CPS24 (GY) and C353-7, circuit CPS25 (WH/VT), harness side while operating the driver seat control switch front height up and down.

- Is the voltage greater than 10 volts when the seat control switch is toggled in both directions and 0 volt in the rest position?

Yes
INSTALL a new power seat track. REFER to Seat Track - Power Seat Track - Power. TEST the system for normal operation.

DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C367. REPOWER the SRS. REFER to Supplemental Restraint System Supplemental Restraint System (SRS) Depowering and Repowering.

No
GO to C7.

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C7 CHECK THE FRONT HEIGHT MOTOR CIRCUIT FOR AN OPEN

- Disconnect: Driver Seat Control Switch C360.
- Measure the resistance between driver seat control switch C360-1, circuit CPS24 (GY), harness side and driver power seat motor assembly C353-1, circuit CPS24 (GY), harness side.

- Is the resistance less than 5 ohms?

Yes
GO to C8.

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

DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C367. REPOWER the SRS. REFER to Supplemental Restraint System Supplemental Restraint System (SRS) Depowering and Repowering.

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C8 CHECK THE FRONT HEIGHT MOTOR CIRCUIT FOR AN OPEN

- Measure the resistance between driver seat control switch C360-8, circuit CPS25 (WH/VT), harness side and driver power seat motor assembly C353-7, circuit CPS25 (WH/VT), harness side.

- Is the resistance less than 5 ohms?

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

DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C367. REPOWER the SRS. REFER to Supplemental Restraint System Supplemental Restraint System (SRS) Depowering and Repowering.

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

DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C367. REPOWER the SRS. REFER to Supplemental Restraint System Supplemental Restraint System (SRS) Depowering and Repowering.

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C9 CHECK FOR VOLTAGE TO THE HORIZONTAL MOTOR

- Ignition OFF.
- Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering in the General Procedures portion of Supplemental Restraint System Supplemental Restraint System (SRS) Depowering and Repowering.
- Disconnect: Driver Seat Side Air Bag C367.
- Disconnect: Driver Power Seat Motor Assembly C353.

- 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. Refer to Battery, Mounting and Cables Service and Repair.
- Measure the voltage between driver power seat motor assembly C353-3, circuit CPS23 (GN/VT) and C353-5, circuit CPS28 (GN), harness side while operating the seat control switch forward and rearward.

- Is the voltage greater than 10 volts when the seat control switch is toggled in both directions and 0 volt in the rest position?

Yes
INSTALL a new power seat track. REFER to Seat Track - Power Seat Track - Power. TEST the system for normal operation.

DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C367. REPOWER the SRS. REFER to Supplemental Restraint System Supplemental Restraint System (SRS) Depowering and Repowering.

No
GO to C10.

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C10 CHECK THE HORIZONTAL MOTOR CIRCUIT FOR AN OPEN

- Disconnect: Driver Seat Control Switch C360.
- Measure the resistance between driver seat control switch C360-6, circuit CPS23 (GN/VT), harness side and driver power seat motor assembly C353-3, circuit CPS23 (GN/VT), harness side.

- Is the resistance less than 5 ohms?

Yes
GO to C11.

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

DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C367. REPOWER the SRS. REFER to Supplemental Restraint System Supplemental Restraint System (SRS) Depowering and Repowering.

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C11 CHECK THE HORIZONTAL MOTOR CIRCUIT FOR AN OPEN

- Measure the resistance between driver seat control switch C360-3, circuit CPS28 (GN), harness side and driver power seat motor assembly C353-5, circuit CPS28 (GN), harness side.