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

Seats

Pinpoint Tests

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

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

Normal Operation

The driver seat control switch is powered by battery voltage on circuit SBB60 (GN/RD) and is supplied ground on circuit GD145 (BK/BU). When pressed, the seat control switch supplies voltage and ground to a power seat track motor to move the seat. When pressed in the opposite direction, the seat control switch reverses the polarity to the same power seat track motor, which moves the seat in the opposite direction. 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). If a new seat track motor needs to be installed, it is necessary to install an entire power seat track.

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

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

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.

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G1 CHECK THE HORIZONTAL MOTOR FOR CORRECT OPERATION

- Operate the driver seat forward and rearward.
- Will the seat move horizontally?

Yes
GO to G5.

No
GO to G2.

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G2 CHECK FOR VOLTAGE TO THE DRIVER SEAT HORIZONTAL MOTOR

- Ignition OFF.
- Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering in the General Procedures portion of Restraint Systems.
- Disconnect: Driver Seat Side Air Bag C328.
- 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. Refer to Battery.
- Measure the voltage between driver seat horizontal motor C362-1, circuit CPS28 (GN), harness side and C362-2, circuit CPS23 (GN/VT), 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 seat track assembly. REFER to Seat Track Seat Track. TEST the system for normal operation.

DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C328.

REPOWER the SRS. REFER to Restraint Systems.

No
GO to G3.

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G3 CHECK HORIZONTAL MOTOR CIRCUIT CPS28 (GN) FOR AN OPEN

- Disconnect: Driver Seat Control Switch C352.
- Measure the resistance between driver seat control switch C352-6, circuit CPS28 (GN), harness side and driver seat horizontal motor C362-1, circuit CPS28 (GN), harness side.

- Is the resistance less than 5 ohms?

Yes
GO to G4.

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

DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C328.

REPOWER the SRS. REFER to Restraint Systems.

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G4 CHECK HORIZONTAL MOTOR CIRCUIT CPS23 (GN/VT) FOR AN OPEN

- Measure the resistance between driver seat control switch C352-3, circuit CPS23 (GN/VT), harness side and driver seat horizontal motor C362-2, circuit CPS23 (GN/VT), harness side.

- Is the resistance less than 5 ohms?

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

DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C328.

REPOWER the SRS. REFER to Restraint Systems.

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

DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C328.

REPOWER the SRS. REFER to Restraint Systems.

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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 Seat Control Switch - Front. TEST the system for normal operation.

DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C328.

REPOWER the SRS. REFER to Restraint Systems.

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G6 CHECK FOR 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 Restraint Systems.
- Disconnect: Driver Seat Side Air Bag C328.
- 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. Refer to Battery.
- Measure the voltage between driver seat rear height motor C363-2, circuit CPS26 (YE/BU), harness side and C363-1, circuit CPS27 (BU/BN), harness side, while depressing the rear height adjust switch 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 Seat Track. TEST the system for normal operation.

DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C328.

REPOWER the SRS. REFER to Restraint Systems.

No
GO to G7.

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G7 CHECK CIRCUIT CPS26 (YE/BU) FOR AN OPEN

- Disconnect: Driver Seat Control Switch C352.
- Measure the resistance between driver seat control switch C352-7, circuit CPS26 (YE/BU), harness side and driver seat rear height motor C363-2, circuit CPS26 (YE/BU), harness side.

- Is the resistance less than 5 ohms?

Yes
GO to G8.

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

DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C328.

REPOWER the SRS. REFER to Restraint Systems.

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G8 CHECK CIRCUIT CPS27 (BU/BN) FOR AN OPEN

- Measure the resistance between driver seat control switch C352-5, circuit CPS27 (BU/BN), harness side and driver seat rear height motor C363-1, circuit CPS27 (BU/BN), 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 seat track assembly. REFER to Seat Track Seat Track. TEST the system for normal operation.

DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C328.

REPOWER the SRS. REFER to Restraint Systems.

No
GO to G10.

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G10 CHECK CIRCUIT CPS24 (GY) FOR AN OPEN

- Disconnect: Driver Seat Control Switch C352.
- Measure the resistance between driver seat control switch C352-8, circuit CPS24 (GY), harness side and driver seat front height motor C382-2, circuit CPS24 (GY), harness side.

- Is the resistance less than 5 ohms?

Yes
GO to G11.

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

DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C328.

REPOWER the SRS. REFER to Restraint Systems.

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G11 CHECK CIRCUIT CPS25 (WH/VT) FOR AN OPEN

- Measure the resistance between driver seat control switch C352-1, circuit CPS25 (WH/VT), harness side, and driver seat front height motor C382-1, circuit CPS25 (WH/VT), harness side.