Pinpoint Test B: The Power Seat Does Not Move Horizontally/Vertically

Seats

Pinpoint Tests

Pinpoint Test B: The Power Seat Does Not Move Horizontally/Vertically

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

Normal Operation

The driver seat control switch is supplied voltage on circuit SBB19 (BU/RD) and ground on circuit GD182 (BK/GY). When pressed, the seat control switch supplies voltage and ground to horizontal motor circuits CPS23 (GN/VT) and CPS28 (GN), front height motor circuits CPS24 (GY) and CPS25 (WH/VT) or rear height motor circuits CPS26 (YE/BU) and CPS27 (BU/BN).

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

PINPOINT TEST B: THE POWER SEAT DOES NOT MOVE HORIZONTALLY/VERTICALLY

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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B1 CHECK THE HORIZONTAL MOTOR FOR CORRECT OPERATION

- Operate the seat forward and rearward.
- Does the seat move forward and rearward?

Yes
GO to B2.

No
GO to B9.

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B2 DETERMINE THE SEAT HEIGHT ADJUST FAILURE

- Adjust both front and rear seat height up and down to determine the failure.
- Does the seat operate in either set of directions?

Yes
If only front height adjustment operates, GO to B3.

If only rear height adjustment operates, GO to B6.

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

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B3 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. Supplemental Restraint System (SRS) Depowering and Repowering
- Disconnect: Driver Seat Side Air Bag C367.
- Disconnect: Driver Safety Belt Buckle Pretensioner C3201.
- Disconnect: Power Seat Motor Assembly C353.

- 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 voltage between power seat motor C353-2, circuit CPS27 (BU/BN), harness side and C353-3, circuit CPS26 YE/BU), harness side, while pressing 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 power seat track. REFER to Seat Track Seat Track. TEST the system for normal operation.

DISCONNECT the battery ground cable. CONNECT driver seat safety belt buckle pretensioner C3201 and driver seat side air bag C367.

REPOWER the SRS. REFER to Restraint Systems.

No
GO to B4.

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B4 CHECK THE REAR HEIGHT MOTOR CIRCUIT FOR AN OPEN

- Disconnect: Seat Control Switch C352.
- Measure the resistance between seat control switch C352-5, circuit CPS27 (BU/BN), harness side and power seat motor assembly C353-2, circuit CPS27 (BU/BN), harness side.

- Is the resistance less than 5 ohms?

Yes
GO to B5.

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

DISCONNECT the battery ground cable. CONNECT driver seat safety belt buckle pretensioner C3201 and driver seat side air bag C367.

REPOWER the SRS. REFER to Restraint Systems.

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B5 CHECK THE REAR HEIGHT MOTOR CIRCUIT FOR AN OPEN

- Measure the resistance between seat control switch C352-7, circuit CPS26 (YE/BU), harness side and power seat motor assembly C353-3, circuit CPS26 (YE/BU), harness side.

- Is the resistance less than 5 ohms?

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

DISCONNECT the battery ground cable. CONNECT driver seat safety belt buckle pretensioner C3201 and driver seat side air bag C367.

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 safety belt buckle pretensioner C3201 and driver seat side air bag C367.

REPOWER the SRS. REFER to Restraint Systems.

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B6 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. Supplemental Restraint System (SRS) Depowering and Repowering
- Disconnect: Driver Seat Side Air Bag C367.
- Disconnect: Driver Safety Belt Buckle Pretensioner C3201.
- Disconnect: Power Seat Motor Assembly C353.

- 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 power seat front height motor C353-5, circuit CPS24 (GY), harness side and C353-6, circuit CPS25 (WH/VT), 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 operated in both directions and 0 volt in the rest position?

Yes
INSTALL a new power seat track. REFER to Seat Track Seat Track. TEST the system for normal operation.

DISCONNECT the battery ground cable. CONNECT driver seat safety belt buckle pretensioner C3201 and driver seat side air bag C367.

REPOWER the SRS. REFER to Restraint Systems.

No
GO to B7.

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B7 CHECK THE FRONT HEIGHT MOTOR CIRCUIT FOR AN OPEN

- Disconnect: Seat Control Switch C352.
- Measure the resistance between seat control switch C352-1, circuit CPS25 (WH/VT), harness side and power seat motor assembly C353-6, circuit CPS25 (WH/VT), harness side.

- Is the resistance less than 5 ohms?

Yes
GO to B8.

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

DISCONNECT the battery ground cable. CONNECT driver seat safety belt buckle pretensioner C3201 and driver seat side air bag C367.

REPOWER the SRS. REFER to Restraint Systems.

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B8 CHECK THE FRONT HEIGHT MOTOR CIRCUIT FOR AN OPEN

- Measure the resistance between seat control switch C352-8, circuit CPS24 (GY), harness side and power seat motor assembly C353-5, circuit CPS24 (GY), harness side.

- Is the resistance less than 5 ohms?

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

DISCONNECT the battery ground cable. CONNECT driver seat safety belt buckle pretensioner C3201 and driver seat side air bag C367.

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 safety belt buckle pretensioner C3201 and driver seat side air bag C367.

REPOWER the SRS. REFER to Restraint Systems.

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B9 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. Supplemental Restraint System (SRS) Depowering and Repowering
- Disconnect: Driver Seat Side Air Bag C367.
- Disconnect: Driver Safety Belt Buckle Pretensioner C3201.
- Disconnect: Power Seat Motor Assembly C353.

- 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 power seat motor C353-4, circuit CPS23 (GN/VT), harness side and C353-1, circuit CPS28 (GN), 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 power seat track. REFER to Seat Track Seat Track. TEST the system for normal operation.

DISCONNECT the battery ground cable. CONNECT driver seat safety belt buckle pretensioner C3201 and driver seat side air bag C367.

REPOWER the SRS. REFER to Restraint Systems.

No
GO to B10.

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B10 CHECK THE HORIZONTAL MOTOR CIRCUIT FOR AN OPEN

- Disconnect: Seat Control Switch C352.
- Measure the resistance between seat control switch C352-3, circuit CPS23 (GN/VT), harness side and power seat motor assembly C353-4, circuit CPS23 (GN/VT), harness side.

- Is the resistance less than 5 ohms?

Yes
GO to B11.

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

DISCONNECT the battery ground cable. CONNECT driver seat safety belt buckle pretensioner C3201 and driver seat side air bag C367.

REPOWER the SRS. REFER to Restraint Systems.

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B11 CHECK THE HORIZONTAL MOTOR CIRCUIT FOR AN OPEN

- Measure the resistance between seat control switch C352-6, circuit CPS28 (GN), harness side and power seat motor assembly C353-1, circuit CPS28 (GN), harness side.