Glass, Frames and Mechanisms — 2016 workshop reference 1232

K8 CHECK FOR CORRECT FCIM (FRONT CONTROLS INTERFACE MODULE) OPERATION

Ignition OFF. Disconnect and inspect all 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 and all previously disconnected rear window defrost system 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 FCIM. Refer to the appropriate section in Group 415 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.

The Defrost System Does Not Shut Off Automatically

Refer to Wiring Diagrams Cell 56 for schematic and connector information.

Normal Operation and Fault Conditions

REFER to: Glass, Frames and Mechanisms - System Operation and Component Description (501-11 Glass, Frames and Mechanisms, Description and Operation).

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Conditions
	B1C83:14 Rear Defog Relay: Circuit Short To Ground or Open	This DTC sets when the FCIM detects an open or short to ground on the rear window defrost relay control circuit.

DTC

Description

Fault Trigger Conditions

B1C83:14 Rear Defog Relay: Circuit Short To Ground or

Open

This DTC sets when the FCIM detects an open or short to ground on the rear window defrost relay control circuit.

Possible Causes

Wiring, terminals or connectors Rear window defrost relay FCIM

PINPOINT TEST L : THE DEFROST SYSTEM DOES NOT SHUT OFF AUTOMATICALLY

L1 CHECK THE REAR WINDOW DEFROST GRID VOLTAGE

Ignition OFF. Disconnect: Rear Window Defrost Relay. Disconnect: Heated Rear Window Element C402A (coupe) or C402 (convertible). Ignition ON. For coupe, measure:

Click to display connectors

Positive Lead	Measurement / Action	Negative Lead
C402A-1		Ground

For convertible, measure:

Click to display connectors

Positive Lead	Measurement / Action	Negative Lead
C402-1		Ground

Is any voltage present?

Yes	REPAIR the circuit.
No	GO to L2

L2 CHECK THE FCIM (FRONT CONTROLS INTERFACE MODULE) OUTPUT

Source reference 1232

2016 Mustang workshop publication supplied to Mustang Atlas. Original technical text and illustrations; HTML formatting by Mustang Atlas. Source page numbering is retained for traceability. Follow the configuration, revision, warnings, and cross-references in the material. About this edition.