Pinpoint Test Ag : The Battery Energy Control Module B (Extended Power Module) Does Not Respond To The Diagnostic Scan Tool

WARNING: This page is about a different car, the 2019 Lincoln MKC. However, it is still accessible from the selected car via links, so may be relevant.

AG1 CHECK THE BECMB (BATTERY ENERGY CONTROL MODULE B) VOLTAGE SUPPLY CIRCUIT FOR AN OPEN

Ignition OFF.

Disconnect: BECMB C3733.

Ignition ON.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C3733-4	Courtesy of FORD MOTOR COMPANY	Ground
C3733-11	Courtesy of FORD MOTOR COMPANY	Ground

Is the voltage greater than 11 volts?

Yes

GO to AG2

No	VERIFY BJB fuse 41 (10A) or BCM fuse 14 (10A) is OK. If OK, REPAIR the circuit. If not OK, REFER to OEM Electrical Wiring Diagram Introduction to identify the possible causes of the circuit short.

AG2 CHECK THE BECMB (BATTERY ENERGY CONTROL MODULE B) GROUND CIRCUIT FOR AN OPEN

Ignition OFF.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C3733-1	Courtesy of FORD MOTOR COMPANY	Ground

Is the resistance less than 3 ohms?

Yes

GO to AG3

No	REPAIR the circuit.

AG3 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
C3733-8	Courtesy of FORD MOTOR COMPANY	C251-6
C3733-2	Courtesy of FORD MOTOR COMPANY	C251-14

Are the resistances less than 3 ohms?

Yes

GO to AG4

No	REPAIR the circuit in question.

AG4 CHECK FOR CORRECT BECMB (BATTERY ENERGY CONTROL MODULE B) OPERATION

Ignition OFF.

Disconnect and inspect the BECMB connector 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 BECMB connector 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, 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.