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

Seats

Pinpoint Tests

Pinpoint Test E: 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 battery voltage on circuit SBB19 (BU/RD) and ground on circuit GD182 (BK/GY). When pressed, the seat control switch supplies that 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 E: 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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E1 CHECK THE HORIZONTAL MOTOR FOR CORRECT OPERATION

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

Yes
GO to E2.

No
GO to E11.

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E2 DETERMINE THE SEAT HEIGHT ADJUST FAILURE

- Adjust both front and rear seat height up and down to determine the failure.
- Does the seat front or rear height adjust up and down?

Yes
If only front height adjustment operates, GO to E3.

If only rear height adjustment operates, GO to E7.

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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E3 CHECK FOR VOLTAGE TO REAR HEIGHT MOTOR CIRCUIT CPS27 (BU/BN)

- Ignition OFF.
- Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering in the General Procedures portion of Air Bag Systems.
- 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.
- Measure the voltage between power seat motor assembly C353-2 circuit CPS27 (BU/BN), harness side and ground while operating the seat to the rear up position.

- Is the voltage greater than 10 volts?

Yes
GO to E5.

No
GO to E4.

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E4 CHECK REAR HEIGHT MOTOR CIRCUIT CPS27 (BU/BN) 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 voltage greater than 10 volts?

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 Air Bag Systems.

No
GO to E6.

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E6 CHECK REAR HEIGHT MOTOR CIRCUIT CPS26 (YE/BU) FOR AN OPEN

- Disconnect: Seat Control Switch C352.
- 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 Air Bag 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 Air Bag Systems.

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E7 CHECK FOR VOLTAGE TO FRONT HEIGHT MOTOR CIRCUIT CPS25 (WH/VT)

- Ignition OFF.
- Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering in the General Procedures portion of Air Bag Systems.
- 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.
- Measure the voltage between power seat motor assembly C353-6 circuit CPS25 (WH/VT), harness side and ground while operating the seat to the front up position.

- Is the voltage greater than 10 volts?

Yes
GO to E9.

No
GO to E8.

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E8 CHECK FRONT HEIGHT MOTOR CIRCUIT CPS25 (WH/VT) 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 E9.

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 Air Bag Systems.

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E9 CHECK FOR VOLTAGE TO FRONT HEIGHT MOTOR CIRCUIT CPS24 (GY)

- Measure the voltage between power seat motor assembly C353-5 circuit CPS24 (GY), harness side and ground while operating the seat to the front down position.

- Is the voltage greater than 10 volts?

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 Air Bag Systems.

No
GO to E10.

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E10 CHECK FRONT HEIGHT MOTOR CIRCUIT CPS24 (GY) FOR AN OPEN

- Disconnect: Seat Control Switch C352.
- 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 Air Bag 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 Air Bag Systems.

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E11 CHECK FOR VOLTAGE TO HORIZONTAL MOTOR CIRCUIT CPS23 (GN/VT)

- Ignition OFF.
- Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering in the General Procedures portion of Air Bag Systems.
- 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.
- Measure the voltage between power seat motor assembly C353-4 circuit CPS23 (GN/VT), harness side and ground while operating the seat forward.

- Is the voltage greater than 10 volts?

Yes
GO to E13.

No
GO to E12.

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E12 CHECK HORIZONTAL MOTOR CIRCUIT CPS23 (GN/VT) 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 voltage greater than 10 volts?

Yes
INSTALL a new front 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 Air Bag Systems.

No
GO to E14.

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E14 CHECK HORIZONTAL MOTOR CIRCUIT CPS28 (GN) FOR AN OPEN

- Disconnect: Seat Control Switch C352.
- 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.