Pinpoint Test Ac : The SCMG (Driver Multi-Contour Seat Module) Does Not Respond To The Diagnostic Scan Tool

WARNING: This page is about a different car, the 2020 Lincoln Corsair. However, it is still accessible from the selected car via links, so may be relevant.

Refer to MODULE COMMUNICATIONS NETWORK for schematic and connector information. Refer to Memory Seats for schematic and connector information.
Normal Operation and Fault Conditions

The SCMG communicates on the MS-CAN.

Possible Sources
- Fuse
- Wiring, terminals and connector
- SCMG
Visual Inspection and Pre-checks
- Verify BJB fuse 61 (15A) is OK.

AC1 CHECK THE SCMG (DRIVER MULTI-CONTOUR SEAT MODULE) VOLTAGE SUPPLY CIRCUIT FOR AN OPEN

Ignition OFF.

Disconnect: SCMG C3385.

Ignition ON.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C3385-1	Courtesy of FORD MOTOR COMPANY	Ground

Is the voltage greater than 11 volts?

Yes

GO to AC3

No	VERIFY BJB fuse 61 (15A) is OK. If OK, GO to AC2 If not OK, REFER to the OEM ELECTRICAL WIRING DIAGRAM INTRODUCTION to identify the possible causes of the circuit short.

AC2 CHECK THE MULTI-CONTOUR SEAT RELAY CIRCUIT FOR AN OPEN

Ignition OFF.

Disconnect BJB C1035A.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C1035A-11	Courtesy of FORD MOTOR COMPANY	C3385-1

Is the resistance less than 3 ohms?

Yes	REFER to the OEM ELECTRICAL WIRING DIAGRAM INTRODUCTION to identify the possible voltage supply circuit concern.

No	REPAIR the open circuit.

AC3 CHECK THE SCMG (DRIVER MULTI-CONTOUR SEAT MODULE) GROUND CIRCUIT FOR AN OPEN

Ignition OFF.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C3385-16	Courtesy of FORD MOTOR COMPANY	Ground

Is the resistance less than 3 ohms?

Yes

GO to AC4

No	REPAIR the circuit.

AC4 CHECK THE MS-CAN (MEDIUM SPEED-CONTROLLER AREA NETWORK) CIRCUITS BETWEEN THE SCMG (DRIVER MULTI-CONTOUR SEAT MODULE) AND THE GWM (GATEWAY MODULE A) FOR AN OPEN

Disconnect: GWM C2431.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C3385-8	Courtesy of FORD MOTOR COMPANY	C2431-23
C3385-7	Courtesy of FORD MOTOR COMPANY	C2431-22

Are the resistances less than 3 ohms?

Yes

GO to AC5

No	REPAIR the circuit in question.

AC5 CHECK FOR CORRECT SCMG (DRIVER MULTI-CONTOUR SEAT MODULE) OPERATION

Ignition OFF.

Disconnect and inspect the SCMG connector and related in-line connectors.

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

Reconnect the SCMG connector and related in-line connectors. Make sure they seat and latch correctly.

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, General Service Bulletin (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 SCMG. REFER to: Driver Multi-Contour Seat Module [SCMG] - Vehicles With: Multi-Contour Seats .

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.