Pinpoint Test I : Both Heated Seats Are Inoperative - Without Heated/Ventilated Seats

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.

I1 CHECK FOR FCIM (FRONT CONTROLS INTERFACE MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)
- Ignition OFF.
- Ignition ON.
- Using a diagnostic scan tool, perform FCIM self-test.
Are any FCIM Diagnostic Trouble Codes (DTCs) present?

Yes REFER to DTC Chart: FCIM .

No GO to I2

I2 CHECK THE FCIM (FRONT CONTROLS INTERFACE MODULE) HEATED SEAT CONTROL SWITCH PARAMETER IDENTIFICATIONS (PIDS)
- Start the engine.
- Using a diagnostic scan tool, monitor the FCIM CC_SW_D_HSEATS and CC_SW_P_HSEATS Parameter Identifications (PIDs) while pressing and releasing the driver and passenger heated seat control switches.
Do the Parameter Identifications (PIDs) change when the driver and passenger heated seat control switches are pressed and released?

Yes GO to I3

No INSTALL a new FCIM. Refer to the appropriate Information and Entertainment Systems article for the procedure.

I3 CHECK THE HEATED SEAT VOLTAGE SUPPLY CIRCUIT FOR AN OPEN

Ignition OFF.

Disconnect: FCIM C2402B .

Ignition ON.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C2402B-1	Courtesy of FORD MOTOR COMPANY	Ground

Is the voltage greater than 11 volts?

Yes

GO to I4

No	VERIFY BJB fuse 77 (30A) is OK. If OK, REPAIR the circuit. If not OK, REFER to the Wiring Diagrams information to identify the possible causes of the circuit short.

I4 CHECK THE FCIM (FRONT CONTROLS INTERFACE MODULE) OPERATION

Ignition OFF.

Disconnect and inspect all of the FCIM 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 FCIM 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 FCIM module. Refer to the appropriate Information and Entertainment Systems article for the procedure.

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.