Pinpoint Test U : The SCME (Front Seat Climate Control Module) Does Not Respond To The Diagnostic Scan Tool

WARNING: This page is about a different car, the 2015 Lincoln MKC. However, it is still accessible from the selected car via links, so may be relevant.

U1 CHECK THE SCME (FRONT SEAT CLIMATE CONTROL MODULE) VOLTAGE SUPPLY CIRCUITS FOR AN OPEN

Ignition OFF.

Disconnect: SCME C3265A .

Ignition ON.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C3265A-E	Courtesy of FORD MOTOR COMPANY	Ground
C3265A-F	Courtesy of FORD MOTOR COMPANY	Ground

Are the voltages greater than 11 volts?

Yes

GO to U2

No	VERIFY the RJB fuse 11 (30A) is OK. If OK, REPAIR the circuit. If not OK, REFER to OEM ELECTRICAL WIRING DIAGRAM INTRODUCTION to identify the possible causes of the circuit short.

U2 CHECK THE SCME (FRONT SEAT CLIMATE CONTROL MODULE) GROUND CIRCUIT FOR AN OPEN

Ignition OFF.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C3265A-M	Courtesy of FORD MOTOR COMPANY	Ground

Is the resistance less than 3 ohms?

Yes

GO to U3

No	REPAIR the circuit.

U3 CHECK THE MS-CAN (MEDIUM SPEED-CONTROLLER AREA NETWORK) CIRCUITS BETWEEN THE SCME (FRONT SEAT CLIMATE CONTROL MODULE) AND THE GWM (GATEWAY MODULE A) FOR AN OPEN

Disconnect: SCME C3265C

Disconnect: GWM C2431 .

Measure:

Positive Lead	Measurement / Action	Negative Lead
C3265C-1	Courtesy of FORD MOTOR COMPANY	C2431-23
C3265C-2	Courtesy of FORD MOTOR COMPANY	C2431-22

Are the resistances less than 3 ohms?

Yes

GO to U4

No	REPAIR the circuit in question.

U4 CHECK FOR CORRECT SCME (FRONT SEAT CLIMATE CONTROL MODULE) OPERATION

Ignition OFF.

Disconnect and inspect all the SCME 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 SCME 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 Technical Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, INSTALL a new SCME. REFER to: Front Seat Climate Control Module [SCME]

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.