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

WARNING: This page is about a different car, the 2018 Ford F-550 Super Duty, 2018 Ford F-450 Super Duty, 2018 Ford F-350 Super Duty, and 2018 Ford F-250 Super Duty. However, it is still accessible from the selected car via links, so may be relevant.

I1 CHECK THE BCM (BODY CONTROL MODULE) VOLTAGE SUPPLY CIRCUIT FOR AN OPEN

Ignition OFF.

Disconnect: BCM C2280H

Measure:

Positive Lead	Measurement / Action	Negative Lead
C2280H-1	Courtesy of FORD MOTOR COMPANY	Ground

Is the voltage greater than 11 volts?

Yes	Connect: BCM C2280H . GO to I2

No	VERIFY the BJB fuse 51 (60A) is OK. If OK, repair the circuit in question. If not OK, REFER to the OEM Wiring Diagrams to identify the possible causes of the circuit short.

I2 CHECK THE BCM (BODY CONTROL MODULE) GROUND CIRCUITS FOR AN OPEN

Disconnect: BCM C2280C

Measure:

Positive Lead	Measurement / Action	Negative Lead
C2280C-6	Courtesy of FORD MOTOR COMPANY	Ground
C2280C-7	Courtesy of FORD MOTOR COMPANY	Ground
C2280C-10	Courtesy of FORD MOTOR COMPANY	Ground

Are the resistances less than 3 ohms?

Yes

GO to I3

No	REPAIR the circuit in question.

I3 CHECK THE HS-CAN1 (HIGH SPEED-CONTROLLER AREA NETWORK 1) CIRCUITS BETWEEN THE BCM (BODY CONTROL MODULE) AND THE DLC (DATA LINK CONNECTOR) FOR AN OPEN

Disconnect: BCM C2280G .

Measure:

Positive Lead	Measurement / Action	Negative Lead
C2280G-10	Courtesy of FORD MOTOR COMPANY	C251-6
C2280G-9	Courtesy of FORD MOTOR COMPANY	C251-14

Are the resistances less than 3 ohms?

Yes

GO to I4

No	REPAIR the circuit in question.

I4 CHECK FOR CORRECT BCM (BODY CONTROL MODULE) OPERATION

Disconnect and inspect the BCM connectors 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 BCM connectors 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 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, Refer to BCM Hardware Testing .

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.