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

Seats

Pinpoint Tests

Pinpoint Test F: The Power Seat Does Not Move Horizontally/Vertically - 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 powered by battery voltage on circuit CBX05 (VT/RD) and is supplied ground on circuit GD903 (BK/WH). When pressed, the seat control switch supplies that 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 that same power seat track motor, which moves the seat in the opposite direction. There is a power seat track motor that moves the seat horizontally (forward/reverse) and a motor in the power recliner mechanism that moves the seat backrest forward or rearward.

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

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

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.

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F1 CHECK THE HORIZONTAL MOTOR FOR CORRECT OPERATION

- Operate the power seat forward and backward.
- Will the seat move horizontally?

Yes
GO to F2.

No
GO to F3.

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F2 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 F6.

If only rear height adjust operates, GO to F9.

No
INSTALL a new passenger 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 passenger safety belt buckle pretensioner C3066.

CONNECT passenger seat side air bag module C3137.

REPOWER the SRS. REFER to Air Bag Systems.

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F3 CHECK THE VOLTAGE TO THE HORIZONTAL MOTOR

- Ignition OFF.
- Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering in the General Procedures of Air Bag Systems.
- Disconnect: Passenger Seat Safety Belt Buckle Pretensioner C3066.
- Disconnect: Passenger Seat Side Air Bag C3137.
- Disconnect: 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.
- Measure the voltage between horizontal motor C332-1, circuit CPS38 (GN/BU), harness side and C332-2, circuit CPS33 (WH), 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 passenger seat track assembly. REFER to Seat Track - Front Seat Track - Front. TEST the system for normal operation.

DISCONNECT the battery ground cable. CONNECT passenger safety belt buckle pretensioner C3066.

CONNECT passenger seat side air bag module C3137.

REPOWER the SRS. REFER to Air Bag Systems.

No
GO to F4.

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F4 CHECK HORIZONTAL MOTOR CIRCUIT CPS38 (GN/BU) FOR AN OPEN

- Disconnect: Seat Control Switch C3190a.
- Measure the resistance between seat control switch C3190-6, circuit CPS38 (GN/BU), harness side and horizontal motor C332-1, circuit CPS38 (GN/BU), harness side.

- Is the resistance less than 5 ohms?

Yes
GO to F5.

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

DISCONNECT the battery ground cable. CONNECT passenger safety belt buckle pretensioner C3066.

CONNECT passenger seat side air bag module C3137.

REPOWER the SRS. REFER to Air Bag Systems.

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F5 CHECK HORIZONTAL MOTOR CIRCUIT CPS33 (WH) FOR AN OPEN

- Measure the resistance between seat control switch C3190-3, circuit CPS33 (WH), harness side and 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 - Front Seat Control Switch - Front. TEST the system for normal operation.

DISCONNECT the battery ground cable. CONNECT passenger safety belt buckle pretensioner C3066.

CONNECT passenger seat side air bag module C3137.

REPOWER the SRS. REFER to Air Bag Systems.

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

DISCONNECT the battery ground cable. CONNECT passenger safety belt buckle pretensioner C3066.

CONNECT passenger seat side air bag module C3137.

REPOWER the SRS. REFER to Air Bag Systems.

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F6 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 of Air Bag Systems.
- Disconnect: Passenger Seat Safety Belt Buckle Pretensioner C3066.
- Disconnect: Passenger Seat Side Air Bag C3137.
- 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.
- Measure the voltage between rear height motor C3075-1, circuit CPS37 (WH/BU), harness side and C3075-5, circuit CPS36 (YE/GY), 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 - Front Seat Track - Front. TEST the system for normal operation.

DISCONNECT the battery ground cable. CONNECT passenger safety belt buckle pretensioner C3066.

CONNECT passenger seat side air bag module C3137.

REPOWER the SRS. REFER to Air Bag Systems.

No
GO to F7.

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F7 CHECK REAR HEIGHT MOTOR CIRCUIT CPS37 (WH/BU) FOR AN OPEN

- Disconnect: Seat Control Switch C3190.
- Measure the resistance between seat control switch C3190-7, circuit CPS37 (WH/BU), harness side and rear height motor C3075-1, circuit CPS37 (WH/BU), harness side.

- Is the resistance less than 5 ohms?

Yes
GO to F8.

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

DISCONNECT the battery ground cable. CONNECT passenger safety belt buckle pretensioner C3066.

CONNECT passenger seat side air bag module C3137.

REPOWER the SRS. REFER to Air Bag Systems.

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F8 CHECK REAR HEIGHT MOTOR CIRCUIT CPS36 (YE/GY) FOR AN OPEN

- Measure the resistance between seat control switch C3190-5, circuit CPS36 (YE/GY), harness side and 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 - Front Seat Control Switch - Front. TEST the system for normal operation.

DISCONNECT the battery ground cable. CONNECT passenger safety belt buckle pretensioner C3066.

CONNECT passenger seat side air bag module C3137.

REPOWER the SRS. REFER to Air Bag Systems.

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

DISCONNECT the battery ground cable. CONNECT passenger safety belt buckle pretensioner C3066.

CONNECT passenger seat side air bag module C3137.

REPOWER the SRS. REFER to Air Bag Systems.

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F9 CHECK THE VOLTAGE TO THE FRONT HEIGHT MOTOR

- Ignition OFF.
- Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering in the General Procedures of Air Bag Systems.
- Disconnect: Passenger Seat Safety Belt Buckle Pretensioner C3066.
- Disconnect: Passenger Seat Side Air Bag C3137.
- Disconnect: 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.
- Measure the voltage between front height motor C3074-1, circuit CPS35 (VT/GN), harness side and C3074-2, circuit CPS34 (GY/BU), 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 passenger seat track assembly. REFER to Seat Track - Front Seat Track - Front. TEST the system for normal operation.

DISCONNECT the battery ground cable. CONNECT passenger safety belt buckle pretensioner C3066.

CONNECT passenger seat side air bag module C3137.

REPOWER the SRS. REFER to Air Bag Systems.

No
GO to F10.

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F10 CHECK FRONT HEIGHT MOTOR CIRCUIT CPS35 (VT/GN) FOR AN OPEN

- Disconnect: Seat Control Switch C3190.
- Measure the resistance between seat control switch C3190-8, 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 F11.

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

DISCONNECT the battery ground cable. CONNECT passenger safety belt buckle pretensioner C3066.

CONNECT passenger seat side air bag module C3137.

REPOWER the SRS. REFER to Air Bag Systems.

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F11 CHECK FRONT HEIGHT MOTOR CIRCUIT CPS34 (GY/BU) FOR AN OPEN

- Measure the resistance between seat control switch C3190-1, circuit CPS34 (GY/BU), harness side, and front height motor C3074-2, circuit CPS34 (GY/BU), harness side.