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

Seats

Pinpoint Tests

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

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

Normal Operation

The passenger seat control switch is supplied battery voltage on circuit CBX05 (VT/RD) and ground on circuit GD903 (BK/WH). When pressed, the seat control switch supplies voltage and ground to a seat track motor to move the seat in the desired direction. 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 motor on the seat track 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 motor (seat track)
- Seat recliner motor

PINPOINT TEST D: THE POWER SEAT DOES NOT MOVE HORIZONTALLY/VERTICALLY/RECLINE - PASSENGER

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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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.

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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.

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D3 CHECK 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 Restraint 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. Refer to Battery.
- 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 Seat Track. TEST the system for normal operation.

DISCONNECT the battery ground cable.

CONNECT passenger seat side air bag module C339.

REPOWER the SRS. REFER to Restraint Systems.

No
GO to D4.

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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. REFER to Restraint Systems.

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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 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. REFER to Restraint 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. REFER to Restraint Systems.

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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 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. REFER to Restraint Systems.

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D7 CHECK 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: 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. Refer to Battery.
- 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 Seat Track. TEST the system for normal operation.

DISCONNECT the battery ground cable.

CONNECT passenger seat side air bag module C339.

REPOWER the SRS. REFER to Restraint Systems.

No
GO to D8.

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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. REFER to Restraint Systems.

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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 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. REFER to Restraint 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. REFER to Restraint Systems.

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D10 CHECK 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 Restraint 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. Refer to Battery.
- 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 Seat Track. TEST the system for normal operation.

DISCONNECT the battery ground cable.

CONNECT passenger seat side air bag module C339.

REPOWER the SRS. REFER to Restraint Systems.

No
GO to D11.

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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. REFER to Restraint Systems.

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D12 CHECK THE FRONT HEIGHT MOTOR CIRCUIT FOR AN OPEN

- Measure the resistance between passenger seat control switch C330-2, circuit CPS24 (GY) harness side, and front height motor C3074-2, 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 seat recliner motor. REFER to Seat Recliner Motor 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. REFER to Restraint Systems.

No
GO to D14.

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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. REFER to Restraint Systems.

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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.