Pinpoint Test K : The BECMB (Battery Energy Control Module B) Does Not Respond To The Diagnostic Scan Tool

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.

K1 CHECK THE BECMB (BATTERY ENERGY CONTROL MODULE B) VOLTAGE SUPPLY CIRCUIT FOR AN OPEN

Disconnect BECMB C2518 .

Ignition ON.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C2518-4	Courtesy of FORD MOTOR COMPANY	Ground
C2518-11	Courtesy of FORD MOTOR COMPANY	Ground

Is the voltage greater than 11 volts?

Yes

GO to K2

No	VERIFY BCM fuse 14 (30A) or fuse 19 (7.5A) is OK. If OK, REPAIR the circuit. If not OK, Refer to the Wiring Diagram Information to identify the possible causes of the circuit short.

K2 CHECK THE BECMB (BATTERY ENERGY CONTROL MODULE B) GROUND CIRCUIT FOR AN OPEN

Ignition OFF.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C2518-1	Courtesy of FORD MOTOR COMPANY	Ground

Is the resistance less than 3 ohms?

Yes

GO to K3

No	REPAIR the circuit.

K3 CHECK THE HS-CAN1 (HIGH-SPEED CONTROLLER AREA NETWORK 1) CIRCUITS BETWEEN THE BECMB (BATTERY ENERGY CONTROL MODULE B) AND THE DLC (DATA LINK CONNECTOR) FOR AN OPEN

Measure:

Positive Lead	Measurement / Action	Negative Lead
C2518-8	Courtesy of FORD MOTOR COMPANY	C251-6
C2518-2	Courtesy of FORD MOTOR COMPANY	C251-14

Are the resistances less than 3 ohms?

Yes

GO to K4

No	REPAIR the circuit in question.

K4 CHECK FOR CORRECT BECMB (BATTERY ENERGY CONTROL MODULE B) OPERATION

Ignition OFF.

Disconnect and inspect the BECMB connector.

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 BECMB connector. Make sure it seats and latches 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 BECMB. REFER to: Battery Energy Control Module B (BECMB) .

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.