Pinpoint Test A: The Power Seat is Inoperative

Seats

Pinpoint Tests

Pinpoint Test A: The Power Seat is Inoperative

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 a power seat track motor to move the seat to the desired position. 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:
- Fuse
- Wiring, terminals or connectors
- Seat control switch


PINPOINT TEST A: THE POWER SEAT IS INOPERATIVE

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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A1 CHECK THE DRIVER SEAT CONTROL SWITCH FOR VOLTAGE

- Ignition OFF.
- Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering in the General Procedures portion of Supplemental Restraint System Supplemental Restraint System (SRS) Depowering and Repowering.
- Disconnect: Driver Seat Side Air Bag C367.
- Disconnect: Driver Safety Belt Buckle Pretensioner C3201.
- Disconnect: Seat Control Switch C352.

- 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, Mounting and Cables Battery Disconnect.
- Measure the voltage between seat control switch C352-4, circuit SBB19 (BU/RD), harness side and ground.





- Is the voltage greater than 10 volts?

Yes
GO to A2.

No
VERIFY Battery Junction Box (BJB) fuse 19 (30A) is OK. If OK, REPAIR the circuit. If not OK, Refer to the Wiring Diagrams to identify the possible causes of the circuit short. Diagrams By Number

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 Supplemental Restraint System Supplemental Restraint System (SRS) Depowering and Repowering.

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A2 CHECK THE SEAT CONTROL SWITCH GROUND CIRCUIT FOR AN OPEN

- Ignition OFF.
- Measure the resistance between seat control switch C352-2, circuit GD182 (BK/GY), harness side and ground.





- 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 Supplemental Restraint System Supplemental Restraint System (SRS) Depowering and Repowering.

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 Supplemental Restraint System Supplemental Restraint System (SRS) Depowering and Repowering.

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