Test Procedure

KC1 CHECK FOR DIAGNOSTIC TROUBLE CODES (DTCS)

Carry out the PCM self-test.

Are DTCs P025A, P025B, P0627 or U0109 present?

Yes	No
For DTC P0627, GO to KC8. For all others, GO to KC2 .	RETURN to SYMPTOM CHARTS for further direction.

KC2 CHECK THE VOLTAGE TO THE FUEL PUMP CONTROL MODULE

Ignition OFF.
Fuel Pump Control Module connector disconnected.
Ignition ON, engine OFF.

Measure the voltage between:

(+) Fuel Pump Control Module Connector, Harness Side	(-)
VPWR Fuel - Pin 1	Ground

Is the voltage greater than 10.5 V?

Yes	No
GO to KC3 .	GO to KC7.

KC3 CHECK THE GND CIRCUIT FOR AN OPEN

Ignition OFF.

Measure the resistance between:

(+) Fuel Pump Control Module Connector, Harness Side	(-)
GND - Pin 4	Ground

Is the resistance less than 5 ohms?

Yes	No
GO to KC4 .	REPAIR the open circuit. Clear the PCM DTCs. REPEAT the self-test.

KC4 CHECK THE FPC AND FPM CIRCUITS FOR AN OPEN

PCM connector disconnected.

Measure the resistance between:

(+) Fuel Pump Control Module Connector, Harness Side	(-) PCM Connector, Harness Side
FPC - Pin 3	FPC - Pin B37
FPM - Pin 7	FPM - Pin B4

Are the resistances less than 5 ohms?

Yes	No
GO to KC5 .	REPAIR the open circuit. Clear the PCM DTCs. REPEAT the self-test.

KC5 CHECK THE FPC AND FPM CIRCUITS FOR A SHORT TO GROUND

Measure the resistance between:

(+) Fuel Pump Control Module Connector, Harness Side	(-)
FPC - Pin 3	Ground
FPM - Pin 7	Ground

Are the resistances greater than 10K ohms?

Yes	No
GO to KC6 .	REPAIR the short circuit. Clear the PCM DTCs. REPEAT the self-test.

KC6 CHECK THE FPC AND FPM CIRCUITS FOR A SHORT TO VOLTAGE

Ignition ON, engine OFF.

Measure the voltage between:

(+) Fuel Pump Control Module Connector, Harness Side	(-)
FPC - Pin 3	Ground
FPM - Pin 7	Ground

Is any voltage present?

Yes	No
REPAIR the short circuit. Clear the PCM DTCs. REPEAT the self-test.	INSTALL a new Fuel Pump Control Module. REFER to the appropriate article, Fuel Charging and Controls. Clear the PCM DTCs. REPEAT the self-test.

KC7 CHECK THE VPWR FUEL CIRCUIT FOR AN OPEN

Ignition OFF.
For C-MAX,
BCM-E connector disconnected.

Measure the resistance between:

(+) Fuel Pump Control Module Connector, Harness Side	(-) BCM-E Connector, Harness Side
VPWR Fuel - Pin 1	VPWR Fuel - Pin 9

For all others,
Fuel Pump Control Module Relay connector disconnected.

Measure the resistance between:

(+) Fuel Pump Control Module Connector, Harness Side	(-) Fuel Pump Control Module Relay Connector, Harness Side
VPWR Fuel - Pin 1	VPWR Fuel - Pin 5

Is the resistance less than 5 ohms?

Yes	No
For C-MAX, INSTALL a new BCM. REFER to the appropriate article, Multifunction Electronic Modules. Clear the PCM DTCs. REPEAT the self-test. For all others, GO to KC16.	REPAIR the open circuit. Clear the PCM DTCs. REPEAT the self-test.

KC8 CHECK THE FPPWR CIRCUIT, FPRTN CIRCUIT, AND INTERNAL FUEL PUMP RESISTANCE

Ignition OFF.
Fuel Pump Control Module connector disconnected.

Measure the resistance between:

(+) Fuel Pump Control Module Connector, Harness Side	(-) Fuel Pump Control Module Connector, Harness Side
FPPWR - Pin 5	FPRTN - Pin 8

Is the resistance less than 10 ohms?

Yes	No
GO to KC11.	GO to KC9 .

KC9 CHECK THE FPPWR AND FPRTN CIRCUITS FOR AN OPEN

FP connector disconnected.

Measure the resistance between:

(+) Fuel Pump Control Module Connector, Harness Side	(-) FP Connector, Harness Side
FPPWR - Pin 5	FPPWR - Pin 5
FPRTN - Pin 8	FPRTN - Pin 4

Are the resistances less than 5 ohms?

Yes	No
GO to KC10 .	REPAIR the open circuit. Clear the PCM DTCs. REPEAT the self-test.

KC10 CHECK THE FP FOR AN OPEN

Measure the resistance between:

(+) FP Connector, Component Side	(-) FP Connector, Component Side
FPPWR - Pin 5	FPRTN - Pin 4

Is the resistance less than 10 ohms?

Yes	No
GO to KC11 .	INSTALL a new FP. REFER to the appropriate article, Fuel Tank and Lines. Clear the PCM DTCs. REPEAT the self-test.

KC11 CHECK THE FPPWR AND FPRTN CIRCUITS FOR A SHORT TO GROUND

Measure the resistance between:

(+) Fuel Pump Control Module Connector, Harness Side	(-)
FPPWR - Pin 5	Ground
FPRTN - Pin 8	Ground

Are the resistances greater than 10K ohms?

Yes	No
GO to KC12 .	REPAIR the short circuit. Clear the PCM DTCs. REPEAT the self-test.

KC12 CHECK FOR FPPWR AND FPRTN CIRCUITS SHORTED TOGETHER

Measure the resistance between:

(+) FP Connector, Harness Side	(-) FP Connector, Harness Side
FPPWR - Pin 5	FPRTN - Pin 4

Is the resistance greater than 10K ohms?

Yes	No
GO to KC13 .	REPAIR the short circuit. Clear the PCM DTCs. REPEAT the self-test.

KC13 CHECK THE FPPWR AND FPRTN CIRCUITS FOR A SHORT TO VOLTAGE

Ignition ON, engine OFF.

Measure the voltage between:

(+) Fuel Pump Control Module Connector, Harness Side	(-)
FPPWR - Pin 5	Ground
FPRTN - Pin 8	Ground

Is any voltage present?

Yes	No
REPAIR the short circuit. Clear the PCM DTCs. REPEAT the self-test.	GO to KC14 .

KC14 INTERMITTENT CHECK

Ignition OFF.

Measure the resistance between:

(+) Fuel Pump Control Module Connector, Harness Side	(-) FP Connector, Harness Side
FPPWR - Pin 5	FPPWR - Pin 5
FPRTN - Pin 8	FPRTN - Pin 4

While monitoring the resistance measurement, wiggle, shake, and bend small sections of the wiring harness while working from the FP to the fuel pump control module.

Is a concern present?

Yes	No
REPAIR as necessary. Clear the PCM DTCs. REPEAT the self-test.	GO to KC15 .

KC15 CHECK THE FUEL PUMP CONTROL MODULE FOR CORRECT OPERATION

Fuel Pump Control Module connector connected.

Measure the voltage between:

(+) FP Connector, Harness Side	(-) FP Connector, Harness Side
FPPWR - Pin 5	FPRTN - Pin 4

Ignition ON, engine OFF.
Access the PCM and control the FP (MODE) PID.
Command the FP PID ON.

Does the voltage increase with the PID commanded ON?

Yes	No
INSTALL a new FP. REFER to the appropriate article, Fuel Tank and Lines. Clear the PCM DTCs. REPEAT the self-test.	INSTALL a new Fuel Pump Control Module. REFER to the appropriate article, Fuel Charging and Controls. Clear the PCM DTCs. REPEAT the self-test.

KC16 CHECK THE FUEL PUMP CONTROL MODULE RELAY FOR CORRECT OPERATION

Carry out the fuel pump control module relay component test. Refer to the appropriate article Component Testing.

Is a concern present?

Yes	No
INSTALL a new Fuel Pump Control Module relay. Clear the PCM DTCs. REPEAT the self-test.	GO to KC17 .

KC17 CHECK THE B+ CIRCUITS FOR AN OPEN

Measure the voltage between:

(+) Fuel Pump Control Module Relay Connector, Harness Side	(-)
B+ - Pin 1, 3	Ground

Is the voltage greater than 10.5 V?

Yes	No
GO to KC18 .	A B+ circuit concern is present. CHECK the condition of the related fuse/fuse links. If OK, REPAIR the open circuit. If the fuse/fuse link is damaged, CHECK the circuit for a short to ground before installing a new fuse/fuse link.

KC18 CHECK THE FP CIRCUIT FOR AN OPEN

BCM-C connector disconnected.

Measure the resistance between:

(+) Fuel Pump Control Module Relay Connector, Harness Side	(-) BCM-C Connector, Harness Side
FP - Pin 2	FP - Pin 26

Is the resistance less than 5 ohms?

Yes	No
INSTALL a new BCM. REFER to the appropriate article, Multifunction Electronic Modules. Clear the PCM DTCs. REPEAT the self-test.	REPAIR the open circuit. Clear the PCM DTCs. REPEAT the self-test.