Pinpoint Test F : The BCM (Body Control Module) Does Not Respond To The Diagnostic Scan Tool

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

NOTE: Failure to disconnect the battery when instructed will result in false resistance readings.

F1 CHECK THE MEDIUM SPEED CONTROLLER AREA NETWORK (MS-CAN) TERMINATION RESISTANCE

Disconnect negative battery cable.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C251-3	Courtesy of FORD MOTOR COMPANY	C251-11

Is the resistance between 54 and 66 ohms?

Yes

GO to F3

GO to F2

F2 CHECK THE MS-CAN (MEDIUM SPEED-CONTROLLER AREA NETWORK) CIRCUITS BETWEEN THE BCM (BODY CONTROL MODULE) AND THE DLC (DATA LINK CONNECTOR) FOR AN OPEN

Disconnect BCM C2280E.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C2280E-6	Courtesy of FORD MOTOR COMPANY	C251-3
C2280E-7	Courtesy of FORD MOTOR COMPANY	C251-11

Are the resistances less than 3 ohms?

Yes	CONNECT negative battery cable. GO to F5

No	REPAIR the circuit in question. CONNECT negative battery cable.

F3 CHECK THE BCM (BODY CONTROL MODULE) VOLTAGE SUPPLY CIRCUITS FOR AN OPEN

Ignition OFF.

Disconnect BCM C2280B.

Connect negative battery cable.

Ignition ON.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C2280B-6	Courtesy of FORD MOTOR COMPANY	Ground

Is the voltage greater than 11 volts?

Yes

GO to F4

No	VERIFY the CJB fuse 21 (7.5A) is OK. If OK, REPAIR the circuit in question. If not OK, REFER to OEM Electrical Wiring Diagram Introduction to identify the possible causes of the circuit short.

F4 CHECK THE BCM (BODY CONTROL MODULE) GROUND CIRCUIT FOR AN OPEN

Ignition OFF.

Disconnect BCM C2280A.

Disconnect negative battery cable.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C2280A-16	Courtesy of FORD MOTOR COMPANY	Ground

Measure:

Positive Lead	Measurement / Action	Negative Lead
C2280B-7	Courtesy of FORD MOTOR COMPANY	Ground
C2280B-16	Courtesy of FORD MOTOR COMPANY	Ground

Are the resistances less than 3 ohms?

Yes	CONNECT negative battery cable. GO to F5

No	REPAIR the circuit. CONNECT negative battery cable.

F5 CHECK FOR CORRECT BCM (BODY CONTROL MODULE) OPERATION

Ignition OFF.

Disconnect and inspect the BCM 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 BCM 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 BCM. REFER to: Body Control Module (BCM) .

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.