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

Seats

Pinpoint Tests

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

Refer to Wiring Diagram Set 120 (Fusion/Milan/MKZ, Fusion Hybrid/Milan Hybrid), Power Seats for schematic and connector information. Diagrams By Number

Normal Operation

The passenger seat control switch is supplied battery voltage on circuit SBB31 (WH/RD) and ground on circuit GD139 (BK/YE). When pressed, the seat control switch supplies voltage and ground to the appropriate power seat track motor to move the seat.

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).

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

PINPOINT TEST K: 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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K1 CHECK THE HORIZONTAL MOTOR FOR CORRECT OPERATION

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

Yes
GO to K5.

No
GO to K2.

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K2 CHECK VOLTAGE TO THE PASSENGER 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: Passenger Seat Side Air Bag C313 .
- Disconnect: Passenger Seat Motor C3015 .
- 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 motor C3015-6, circuit CPS38 (GN/BU), harness side and C3015-3, circuit CPS33 (WH), harness side, while operating the seat control switch horizontal adjust 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 Seat Track. TEST the system for normal operation.

DISCONNECT the battery ground cable. CONNECT passenger seat side air bag module C313. REPOWER the SRS. REFER to Restraint Systems.

No
GO to K3.

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K3 CHECK THE HORIZONTAL MOTOR CIRCUIT FOR AN OPEN AND SHORT TO GROUND

- Disconnect: Passenger Seat Control Switch C330 .
- Measure the resistance between:
- passenger seat control switch C330-3, circuit CPS33 (WH), harness side and passenger seat motor C3015-3, circuit CPS33 (WH), harness side.
- passenger seat control switch C330-3, circuit CPS33 (WH), harness side and ground.

- Is the resistance less than 5 ohms between the passenger seat motor and the passenger seat control switch; and greater than 10,000 ohms between the passenger seat control switch and ground?

Yes
GO to K4.

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

DISCONNECT the battery ground cable. CONNECT passenger seat side air bag module C313. REPOWER the SRS. REFER to Restraint Systems.

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K4 CHECK THE HORIZONTAL MOTOR CIRCUIT FOR AN OPEN AND SHORT TO GROUND

- Measure the resistance between:
- passenger seat control switch C330-6, circuit CPS38 (GN/BU), harness side and passenger seat motor C3015-6, circuit CPS38 (GN/BU), harness side.
- passenger seat control switch C330-6, circuit CPS38 (GN/BU), harness side and ground.

- Is the resistance less than 5 ohms between the passenger seat motor and the passenger seat control switch; and greater than 10,000 ohms between the passenger seat control switch and ground?

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 C313. 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 C313. REPOWER the SRS. REFER to Restraint Systems.

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K5 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 K6.

If only rear height adjust operates, GO to K9.

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 C313. REPOWER the SRS. REFER to Restraint Systems.

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K6 CHECK VOLTAGE TO THE PASSENGER SEAT 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 C313 .
- Disconnect: Passenger Seat Motor C3015 .
- 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 motor C3015-1, circuit CPS37 (WH/BU), harness side and C3015-4, 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 Seat Track. TEST the system for normal operation.

DISCONNECT the battery ground cable. CONNECT passenger seat side air bag module C313. REPOWER the SRS. REFER to Restraint Systems.

No
GO to K7.

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K7 CHECK THE REAR HEIGHT MOTOR CIRCUIT FOR AN OPEN AND SHORT TO GROUND

- Disconnect: Passenger Seat Control Switch C330 .
- Measure the resistance between:
- passenger seat control switch C330-5, circuit CPS36 (YE/GY), harness side and passenger seat motor C3015-4, circuit CPS36 (YE/GY), harness side.
- passenger seat control switch C330-5, circuit CPS36 (YE/GY), harness side and ground.

- Is the resistance less than 5 ohms between the passenger seat motor and the passenger seat control switch; and greater than 10,000 ohms between the passenger seat control switch and ground?

Yes
GO to K8.

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

DISCONNECT the battery ground cable. CONNECT passenger seat side air bag module C313. REPOWER the SRS. REFER to Restraint Systems.

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K8 CHECK THE REAR HEIGHT MOTOR CIRCUIT FOR AN OPEN AND SHORT TO GROUND

- Measure the resistance between:
- passenger seat control switch C330-7, circuit CPS37 (WH/BU), harness side and passenger seat motor C3015-1, circuit CPS37 (WH/BU), harness side.
- passenger seat control switch C330-7, circuit CPS37 (WH/BU), harness side and ground.

- Is the resistance less than 5 ohms between the passenger seat motor and the passenger seat control switch; and greater than 10,000 ohms between the passenger seat control switch and ground?

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 C313. 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 C313. REPOWER the SRS. REFER to Restraint Systems.

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K9 CHECK VOLTAGE TO THE PASSENGER SEAT 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 C313 .
- Disconnect: Passenger Seat Motor C3015 .
- 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 motor C3015-2, circuit CPS35 (VT/GN), harness side and C3015-5, circuit CPS34 (GY/BU), harness side, while operating the seat control switch front 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 Seat Track. TEST the system for normal operation.

DISCONNECT the battery ground cable. CONNECT passenger seat side air bag module C313. REPOWER the SRS. REFER to Restraint Systems.

No
GO to K10.

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K10 CHECK THE FRONT HEIGHT MOTOR CIRCUIT FOR AN OPEN AND SHORT TO GROUND

- Disconnect: Passenger Seat Control Switch C330 .
- Measure the resistance between:
- passenger seat control switch C330-1, circuit CPS34 (GY/BU), harness side and passenger seat motor C3015-5, circuit CPS34 (GY/BU), harness side.
- passenger seat control switch C330-1, circuit CPS34 (GY/BU), harness side and ground.

- Is the resistance less than 5 ohms between the passenger seat motor and the passenger seat control switch; and greater than 10,000 ohms between the passenger seat control switch and ground?

Yes
GO to K11.

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

DISCONNECT the battery ground cable. CONNECT passenger seat side air bag module C313. REPOWER the SRS. REFER to Restraint Systems.

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K11 CHECK THE FRONT HEIGHT MOTOR CIRCUIT FOR AN OPEN AND SHORT TO GROUND

- Measure the resistance between:
- passenger seat control switch C330-8, circuit CPS35 (VT/GN) harness side and passenger seat motor C3015-2, circuit CPS35 (VT/GN), harness side.
- passenger seat control switch C330-8, circuit CPS35 (VT/GN), harness side and ground.