Pinpoint Test W : The Direct Current/Direct Current (Dc/Dc) Converter Control Module Does Not Respond To The Scan Tool

WARNING: This page is about a different car, the 2015 Ford Focus. 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.

W1 CHECK THE DIRECT CURRENT/DIRECT CURRENT (DC/DC) CONVERTER CONTROL MODULE VOLTAGE SUPPLY CIRCUITS FOR AN OPEN

Ignition OFF.

Disconnect: Direct Current/Direct Current (DC/DC) Converter Control Module C1457B

Ignition ON.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C1457B-1	Courtesy of FORD MOTOR COMPANY	Ground

Is the voltage greater than 11 volts?

Yes

GO to W2

No	VERIFY the High Current BJB MEGA fuse 2 (150A) is OK. If OK, REPAIR the circuit. If not OK, REFER to the OEM WIRING DIAGRAMS (ELECTRIC) article to identify the possible causes of the circuit short.

W2 CHECK THE DIRECT CURRENT/DIRECT CURRENT (DC/DC) CONVERTER CONTROL MODULE GROUND CIRCUIT FOR AN OPEN

Ignition OFF.

Disconnect: Direct Current/Direct Current (DC/DC) Converter Control Module C1457C

Measure:

Positive Lead	Measurement / Action	Negative Lead
C1457C-1	Courtesy of FORD MOTOR COMPANY	Ground

Is the resistance less than 3 ohms?

Yes

GO to W3

No	REPAIR the circuit.

W3 CHECK THE ELECTRIC VEHICLE (EV) HIGH SPEED CONTROLLER AREA NETWORK (HS-CAN) CIRCUITS BETWEEN THE DIRECT CURRENT/DIRECT CURRENT (DC/DC) CONVERTER CONTROL MODULE AND THE DATA LINK CONNECTOR (DLC) FOR AN OPEN

Disconnect: Direct Current/Direct Current (DC/DC) Converter Control Module C1457D

Measure:

Positive Lead	Measurement / Action	Negative Lead
C1457D-9	Courtesy of FORD MOTOR COMPANY	C251-6
C1457D-6	Courtesy of FORD MOTOR COMPANY	C251-14

Are the resistances less than 3 ohms?

Yes

GO to W4

No	REPAIR the circuit in question.

W4 CHECK FOR CORRECT DIRECT CURRENT/DIRECT CURRENT (DC/DC) CONVERTER CONTROL MODULE OPERATION

Ignition OFF.

Disconnect and inspect all the Direct Current/Direct Current (DC/DC) Converter Control Module 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 Direct Current/Direct Current (DC/DC) Converter Control Module 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, INSTALL a new Direct Current/Direct Current (DC/DC) Converter Control Module. REFER to: Direct Current/Direct Current (DC/DC) Converter Control Module .

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.