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

Seats

Pinpoint Tests

Pinpoint Test G: 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

When pressed in 1 of 6 available directions, the seat control switch supplies battery voltage and ground to 1 of 3 seat track assembly motors through horizontal motor circuits CPS33 (WH) and CPS38 (GN/BU), front height motor circuits CPS34 (GY/BU) and CPS35 (VT/GN) or rear height motor circuits CPS36 (YE/GY) and CPS37 (WH/BU). The seat control switch is normally closed to ground on all 6 of the seat motor circuits, so if one circuit becomes closed to voltage, the circuit on the opposite side of the same motor is still closed to ground. The seat motor will then operate, moving the seat track in the selected direction.

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

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

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G1 CHECK THE HORIZONTAL MOTOR FOR CORRECT OPERATION

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

Yes
GO to G5.

No
GO to G2.

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G2 CHECK THE VOLTAGE TO THE PASSENGER SEAT HORIZONTAL MOTOR

- Disconnect: Passenger Seat Motor C3015.
- Measure the voltage between passenger seat motor C3015-4, circuit CPS33 (WH), harness side and C3015-1, circuit CPS38 (GN/BU), 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 passenger seat track assembly. REFER to Seat Track - Front, Bucket Seat Seat Track - Front, Bucket Seat. TEST the system for normal operation.

No
GO to G3.

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G3 CHECK THE HORIZONTAL MOTOR CIRCUIT CPS38 (GN/BU) FOR AN OPEN

- Disconnect: Passenger Seat Control Switch C330.
- Measure the resistance between passenger seat control switch C330-3, circuit CPS38 (GN/BU), harness side and passenger seat motor C3015-1, circuit CPS38 (GN/BU), harness side.

- Is the resistance less than 5 ohms?

Yes
GO to G4.

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

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G4 CHECK THE HORIZONTAL MOTOR CIRCUIT CPS33 (WH) FOR AN OPEN

- Measure the resistance between passenger seat control switch C330-6, circuit CPS33 (WH), harness side and passenger seat motor C3015-4, 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.

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

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G5 DETERMINE THE SEAT HEIGHT ADJUST FAILURE

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

Yes
If only the front height adjust operates, GO to G6.

If only the rear height adjust operates, GO to G9.

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

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G6 CHECK THE VOLTAGE TO THE PASSENGER SEAT REAR HEIGHT MOTOR

- Ignition OFF.
- Disconnect: Passenger Seat Motor C3015.
- Measure the voltage between passenger seat motor C3015-2, circuit CPS37 (WH/BU), harness side and C3015-3, circuit CPS36 (YE/GY), harness side, while operating the seat control switch rear height adjust 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 passenger seat track assembly. REFER to Seat Track - Front, Bucket Seat Seat Track - Front, Bucket Seat. TEST the system for normal operation.

No
GO to G7.

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G7 CHECK THE REAR HEIGHT MOTOR CIRCUIT CPS37 (WH/BU) FOR AN OPEN

- Disconnect: Passenger Seat Control Switch C330.
- Measure the resistance between passenger seat control switch C330-1, circuit CPS37 (WH/BU), harness side and passenger seat motor C3015-2, circuit CPS37 (WH/BU), harness side.

- Is the resistance less than 5 ohms?

Yes
GO to G8.

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

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G8 CHECK THE REAR HEIGHT MOTOR CIRCUIT CPS36 (YE/GY) FOR AN OPEN

- Measure the resistance between passenger seat control switch C330-8, circuit CPS36 (YE/GY), harness side and passenger seat motor C3015-3, circuit CPS36 (YE/GY), harness side.

- 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 passenger seat track assembly. REFER to Seat Track - Front, Bucket Seat Seat Track - Front, Bucket Seat. TEST the system for normal operation.

No
GO to G10.

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G10 CHECK THE FRONT HEIGHT MOTOR CIRCUIT CPS35 (VT/GN) FOR AN OPEN

- Disconnect: Passenger Seat Control Switch C330.
- Measure the resistance between passenger seat control switch C330-7, circuit CPS35 (VT/GN), harness side and passenger seat motor C3015-5, circuit CPS35 (VT/GN), harness side.

- Is the resistance less than 5 ohms?

Yes
GO to G11.

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

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G11 CHECK CIRCUIT CPS34 (GY/BU) FOR AN OPEN

- Measure the resistance between passenger seat control switch C330-5, circuit CPS34 (GY/BU) harness side, and passenger seat motor C3015-6, circuit CPS34 (GY/BU), harness side.