Pinpoint Test F : The LH (Left-Hand) Power Fold Seat Is Inoperative

WARNING: This page is about a different car, the 2018 Lincoln Navigator. However, it is still accessible from the selected car via links, so may be relevant.

F1 CHECK THE THIRD ROW SEAT CONTROL SWITCH RESISTANCE VALUES

Ignition OFF.

Disconnect: SCMJ C4250C and C4250D .

Measure:

Positive Lead	Measurement / Action	Negative Lead
C4250D-7	Courtesy of FORD MOTOR COMPANY	C4250C-4

Switch Position	Resistance
3L	673 - 687 ohms
Both Seats	1, 198 - 1, 222 ohms
3R	219 - 223 ohms
All switches at rest	7, 425 - 7, 575 ohms

Is the resistance within the specified range for each control switch position?

Yes

GO to F2

No	INSTALL a new third row seat control switch. REFER to: Power Fold Seat Control Switch .

F2 CHECK THE THIRD ROW SEAT LIFT/FOLD MOTOR CIRCUITS FOR A SHORT TO VOLTAGE

Disconnect: SCMJ C4250B .

Ignition ON.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C4250B-3	Courtesy of FORD MOTOR COMPANY	Ground
C4250B-4	Courtesy of FORD MOTOR COMPANY	Ground
C4250B-9	Courtesy of FORD MOTOR COMPANY	Ground
C4250B-10	Courtesy of FORD MOTOR COMPANY	Ground

Positive Lead	Measurement / Action	Negative Lead
C4250C-2	Courtesy of FORD MOTOR COMPANY	Ground
C4250C-12	Courtesy of FORD MOTOR COMPANY	Ground
C4250C-14	Courtesy of FORD MOTOR COMPANY	Ground

Are any voltages present?

Yes	REPAIR the circuit in question.

GO to F3

F3 CHECK THE THIRD ROW SEAT LIFT/FOLD MOTOR CIRCUITS FOR A SHORT TO GROUND

Ignition OFF.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C4250B-3	Courtesy of FORD MOTOR COMPANY	Ground
C4250B-4	Courtesy of FORD MOTOR COMPANY	Ground
C4250B-9	Courtesy of FORD MOTOR COMPANY	Ground
C4250B-10	Courtesy of FORD MOTOR COMPANY	Ground

Positive Lead	Measurement / Action	Negative Lead
C4250C-2	Courtesy of FORD MOTOR COMPANY	Ground
C4250C-12	Courtesy of FORD MOTOR COMPANY	Ground
C4250C-14	Courtesy of FORD MOTOR COMPANY	Ground

Are the resistances greater than 10, 000 ohms?

Yes

GO to F4

No	REPAIR the circuit in question.

F4 CHECK THE THIRD ROW SEAT LIFT/FOLD MOTOR CIRCUITS FOR AN OPEN

Disconnect: LH Third Row Seat Lift/Fold Motor 2 C4243 and LH Third Row Seat Lift/Fold Motor 4 C4246 .

Measure:

Positive Lead	Measurement / Action	Negative Lead
C4250B-4	Courtesy of FORD MOTOR COMPANY	C4243-1
C4250B-10	Courtesy of FORD MOTOR COMPANY	C4243-3

Positive Lead	Measurement / Action	Negative Lead
C4250B-3	Courtesy of FORD MOTOR COMPANY	C4246-1
C4250B-9	Courtesy of FORD MOTOR COMPANY	C4246-3

Positive Lead	Measurement / Action	Negative Lead
C4250C-2	Courtesy of FORD MOTOR COMPANY	C4243-4
C4250C-12	Courtesy of FORD MOTOR COMPANY	C4243-2

Positive Lead	Measurement / Action	Negative Lead
C4250C-2	Courtesy of FORD MOTOR COMPANY	C4246-4
C4250C-14	Courtesy of FORD MOTOR COMPANY	C4246-2

Are the resistances less than 3 ohms?

Yes

GO to F5

No	REPAIR the circuit in question.

F5 CHECK THE SCMJ (POWER FOLD SEAT MODULE) OPERATION

Ignition OFF.

Disconnect and inspect the SCMJ connectors.

Repair:
- corrosion (install new connector or terminals - clean module pins)
- damaged or bent pins - install new terminals/pins as necessary
- pushed-out pins - install new pins as necessary

Reconnect the SCMJ connectors. Make sure they seat and latch correctly.

Reconnect all previously disconnected connectors.

Ignition ON.

Operate the system and determine if the concern is still present.

Is the concern still present?

Yes

CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new SCMJ. REFER to: Power Fold Seat Module (PFSM) . TEST the system for normal operation. If the concern is still present, INSTALL a new seat assembly.

No	The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.