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HOMESERVICE MANUALSFORD2021EDGE SE, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 473 (ENGINE CONTROLS - PINPOINT TESTS (DIESEL))PINPOINT TESTS AH: COOLING FANTEST PROCEDURE

2021 Ford Edge SE, 4WD

Test Procedure

2021 Ford Edge SE, 4WDSECTION Test Procedure

WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2019 Ford Transit-350 HD, 2019 Ford Transit-350, 2019 Ford Transit-250, 2019 Ford Transit-150, and 2019 Ford F-550 Super Duty. However, it is still accessible from the selected car via links, so may be relevant.

AH1 PRELIMINARY DIAGNOSIS

Are DTCs P0480, P0483, P0494, P0495, P0528, P0529, P0691, P0692, P0693, or P0694 present?

Yes	No
For Transit with DTCs P0691 or P0692, GO to AH3. For Transit with DTCs P0693 or P0694, GO to AH8. F-150, F-650/F-750 and F-Series Super Duty with DTCs P0483, P0494, P0495, P0528 or P0529, GO to AH18. For all others, GO to AH27.	For F-150, F-650/F-750 and F-Series Super Duty symptoms without DTCs, GO to AH18. For Transit symptoms without DTCs, GO to AH2. For all others, RETURN to SYMPTOM CHARTS for further direction.

AH2 VERIFY A/C STATUS

Verify the A/C system is OFF.
Ignition ON, engine running.
Access the PCM and monitor the AC_REQ (MODE) PID.

Is A/C being requested?

Yes	No
REFER to the Climate Control System article, to diagnose the A/C system.	GO to AH3.

AH3 CHECK THE VOLTAGE TO THE FC1 RELAY

Ignition OFF.
FC1 Relay connector disconnected.
Ignition ON, engine OFF.

Measure the voltage between:

(+) FC1 Relay Connector, Harness Side	(-)
VPWR - Pin 1	Ground
B+ - Pin 3	Ground

Are the voltages greater than 10.5 V?

Yes	No
GO to AH4.	REPAIR the open circuit. Clear the PCM DTCs. REPEAT the self-test.

AH4 CHECK FC1 RELAY

Carry out the Relay Component Test. Refer to Component Testing Wiring Diagrams.

Is a concern present?

Yes	No
INSTALL a new FC1 relay. Clear the PCM DTCs. REPEAT the self-test.	GO to AH5.

AH5 CHECK THE LFC CIRCUIT FOR AN OPEN

Ignition OFF.
PCM-B connector disconnected.

Measure the resistance between:

(+) FC1 Relay Connector, Harness Side	(-) PCM-B Connector, Harness Side
LFC - Pin 2	LFC

Is the resistance less than 5 ohms?

Yes	No
GO to AH6.	REPAIR the open circuit. Clear the PCM DTCs. REPEAT the self-test.

AH6 CHECK THE LFC CIRCUIT FOR A SHORT TO GROUND

Measure the resistance between:

(+) FC1 Relay Connector, Harness Side	(-)
LFC - Pin 2	Ground

Is the resistance greater than 10K ohms?

Yes	No
GO to AH7.	REPAIR the short circuit. Clear the PCM DTCs. REPEAT the self-test.

AH7 CHECK THE LFC CIRCUIT FOR A SHORT TO VOLTAGE

Ignition ON, engine OFF.

Measure the voltage between:

(+) FC1 Relay Connector, Harness Side	(-)
LFC - Pin 2	Ground

Is any voltage present?

Yes	No
REPAIR the short circuit. Clear the PCM DTCs. REPEAT the self-test.	For all others, GO to AH8.

AH8 CHECK THE VOLTAGE TO THE FC2 RELAY

Ignition OFF.
FC2 Relay connector disconnected.
Ignition ON, engine OFF.

Measure the voltage between:

(+) FC2 Relay Connector, Harness Side	(-)
VPWR - Pin 1	Ground
B+ - Pin 3	Ground

Are the voltages greater than 10.5 V?

Yes	No
GO to AH9.	REPAIR the open circuit. Clear the PCM DTCs. REPEAT the self-test.

AH9 CHECK THE FC2 RELAY

Carry out the Relay Component Test. Refer to Component Testing Wiring Diagrams.

Is a concern present?

Yes	No
INSTALL a new FC2 relay. Clear the PCM DTCs. REPEAT the self-test.	GO to AH10.

AH10 CHECK THE HFC CIRCUIT FOR AN OPEN

Ignition OFF.
PCM-B connector disconnected.

Measure the resistance between:

(+) FC2 Relay Connector, Harness Side	(-) PCM-B Connector, Harness Side
HFC - Pin 2	HFC

Is the resistance less than 5 ohms?

Yes	No
GO to AH11.	REPAIR the open circuit. Clear the PCM DTCs. REPEAT the self-test.

AH11 CHECK THE HFC CIRCUIT FOR A SHORT TO GROUND

Measure the resistance between:

(+) FC2 Relay Connector, Harness Side	(-)
HFC - Pin 2	Ground

Are the resistances greater than 10K ohms?

Yes	No
GO to AH12.	REPAIR the short circuit. Clear the PCM DTCs. REPEAT the self-test.

AH12 CHECK THE HFC CIRCUIT FOR A SHORT TO VOLTAGE

Ignition ON, engine OFF.

Measure the voltage between:

(+) FC2 Relay Connector, Harness Side	(-)
HFC - Pin 2	Ground

Is any voltage present?

Yes	No
REPAIR the short circuit. Clear the PCM DTCs. REPEAT the self-test.	For all others, GO to AH13.

AH13 CHECK THE FANPWR CIRCUIT FOR AN OPEN

Ignition OFF.
Cooling Fan Motor 1 connector disconnected.

Measure the resistance between:

(+) FC2 Relay Connector, Harness Side	(-) Cooling Fan Motor 1 Connector, Harness Side
FANPWR - Pin 5	FANPWR - Pin 2

Measure the resistance between:

(+) FC1 Relay Connector, Harness Side	(-) Cooling Fan Motor 1 Connector, Harness Side
FANPWR - Pin 5	FANPWR - Pin 2

Are the resistances less than 5 ohms?

Yes	No
GO to AH14.	REPAIR the open circuit. Clear the PCM DTCs. REPEAT the self-test.

AH14 CHECK THE FANPWR CIRCUIT FOR A SHORT TO VOLTAGE

Ignition ON, engine OFF.

Measure the voltage between:

(+) Cooling Fan Motor 1 Connector, Harness Side	(-)
FANPWR - Pin 2	Ground

Is any voltage present?

Yes	No
REPAIR the short circuit. Clear the PCM DTCs. REPEAT the self-test.	GO to AH15.

AH15 CHECK GROUND CIRCUITS

Ignition OFF.

Measure the resistance between:

(+) Cooling Fan Motor 1 Connector, Harness Side	(-)
GND - Pin 1	Ground

Is the resistance less than 5 ohms?

Yes	No
GO to AH16.	REPAIR the open circuit. Clear the PCM DTCs. REPEAT the self-test.

AH16 COMMAND THE FANS ON AND CHECK FOR VOLTAGE TO THE COOLING FAN MOTORS

Ignition OFF.
PCM-B connector connected.
FC1 Relay connector connected.
FC2 Relay connector connected.
Ignition ON, engine OFF.
Access the PCM and control the FAN1 (MODE) PID.
Command the PID ON.

Measure the voltage between:

(+) Cooling Fan Motor 1 Connector, Harness Side	(-)
FANPWR - Pin 2	Ground

Record the voltage.
Command the PID OFF.
Access the PCM and control the FAN2 (MODE) PID.
Command the PID ON.

Measure the voltage between:

(+) Cooling Fan Motor 1 Connector, Harness Side	(-)
FANPWR - Pin 2	Ground

Record the voltage.

Are the voltages greater than 10.5 V?

Yes	No
GO to AH17.	GO to PINPOINT TEST ZZ .

AH17 CHECK FOR CORRECT FAN OPERATION

Ignition OFF.
Cooling Fan Motor 1 connector connected.
Ignition ON, engine OFF.
Access the PCM and control the FAN1 (MODE) PID.
Command the PID ON.
Check for fan operation.
Command the PID OFF.
Access the PCM and control the FAN2 (MODE) PID.
Command the PID ON.
Check for fan operation.

Does the fan operate when commanded ON?

Yes	No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.	INSTALL a new Cooling Fan motor. REFER to the Engine Cooling article, Cooling Fan. Clear the PCM DTCs. REPEAT the self-test.

AH18 CHECK THE FAN SPEED SENSOR FOR VOLTAGE

Ignition OFF.
Cooling Fan connector disconnected.
Ignition ON, engine OFF.

Measure the voltage between:

(+) Cooling Fan Connector, Harness Side	(-) Cooling Fan Connector, Harness Side
VBPWR - Pin 2	GND - Pin 5

Is the voltage greater than 10.5 V?

Yes	No
GO to AH23.	GO to AH19.

AH19 CHECK THE VBPWR CIRCUIT FOR VOLTAGE

Measure the voltage between:

(+) Cooling Fan Connector, Harness Side	(-)
VBPWR - Pin 2	Ground

Is the voltage greater than 10.5 V?

Yes	No
GO to AH22.	GO to AH20.

AH20 CHECK THE VBPWR CIRCUIT FOR AN OPEN

Ignition OFF.
PCM-B connector disconnected.

Measure the resistance between:

(+) Cooling Fan Connector, Harness Side	(-) PCM-B Connector, Harness Side
VBPWR - Pin 2	VBPWR

Is the resistance less than 5 ohms?

Yes	No
GO to AH21.	REPAIR the open circuit. Clear the PCM DTCs. REPEAT the self-test.

AH21 CHECK THE VBPWR CIRCUIT FOR A SHORT TO GROUND

Measure the resistance between:

(+) Cooling Fan Connector, Harness Side	(-)
VBPWR - Pin 2	Ground

Is the resistance greater than 10K ohms?

Yes	No
For DTC P0494 or cooling fan always on, GO to AH33. For DTC P0495 or cooling fan does not run, GO to AH34. For all others, GO to PINPOINT TEST ZZ .	REPAIR the short circuit. Clear the PCM DTCs. REPEAT the self-test.

AH22 CHECK THE GND CIRCUIT FOR AN OPEN

Ignition OFF.

Measure the resistance between:

(+) Cooling Fan Connector, Harness Side	(-)
GND - Pin 5	Ground

Is the resistance less than 5 ohms?

Yes	No
For DTC P0494 or cooling fan always on, GO to AH33. For DTC P0495 or cooling fan does not run, GO to AH34. For all others, GO to PINPOINT TEST ZZ .	REPAIR the open circuit. Clear the PCM DTCs. REPEAT the self-test.

AH23 CHECK THE FAN SPEED SENSOR SIGNAL CIRCUIT FOR AN OPEN

Ignition OFF.
PCM-B connector disconnected.

Measure the resistance between:

(+) Cooling Fan Connector, Harness Side	(-) PCM-B Connector, Harness Side
FSS - Pin 4	FSS

Is the resistance less than 5 ohms?

Yes	No
GO to AH24.	REPAIR the open circuit. Clear the PCM DTCs. REPEAT the self-test.

AH24 CHECK THE SIGNAL CIRCUIT FOR A SHORT TO GROUND

Measure the resistance between:

(+) Cooling Fan Connector, Harness Side	(-)
FSS - Pin 4	Ground

Is the resistance greater than 10K ohms?

Yes	No
GO to AH25.	REPAIR the short circuit. Clear the PCM DTCs. REPEAT the self-test.

AH25 CHECK THE SIGNAL CIRCUIT FOR A SHORT TO VOLTAGE

Ignition ON, engine OFF.

Measure the voltage between:

(+) Cooling Fan Connector, Harness Side	(-)
FSS - Pin 4	Ground

Is any voltage present?

Yes	No
REPAIR the short circuit. Clear the PCM DTCs. REPEAT the self-test.	GO to AH26.

AH26 CHECK THE SIGNAL CIRCUIT FOR VOLTAGE

Ignition OFF.
PCM-B connector connected.
Ignition ON, engine OFF.

Measure the voltage between:

(+) Cooling Fan Connector, Harness Side	(-)
FSS - Pin 4	Ground

Is the voltage greater than 10.5 V?

Yes	No
For DTC P0494 or cooling fan always on, GO to AH33. For DTC P0495 or cooling fan does not run. GO to AH34. For all others, GO to PINPOINT TEST RD .	GO to AH35.

AH27 CHECK THE VPWR CIRCUIT FOR VOLTAGE

Ignition ON, engine OFF.

Measure the voltage between:

(+) Cooling Fan Connector, Harness Side	(-)
VPWR - Pin 1	Ground

Is the voltage greater than 10.5 V?

Yes	No
GO to AH28.	REPAIR the open circuit. Clear the PCM DTCs. REPEAT the self-test.

AH28 CHECK THE FCV CIRCUIT FOR AN OPEN CIRCUIT

Ignition OFF.
PCM-B connector disconnected.

Measure the resistance between:

(+) Cooling Fan Connector, Harness Side	(-) PCM-B Connector, Harness Side
FCV - Pin 6	FCV

Is the resistance less than 5 ohms?

Yes	No
GO to AH29.	REPAIR the open circuit. Clear the PCM DTCs. REPEAT the self-test.

AH29 CHECK THE FCV CIRCUIT FOR A SHORT TO GROUND

Measure the resistance between:

(+) Cooling Fan Connector, Harness Side	(-)
FCV - Pin 6	Ground

Is the resistance greater than 10K ohms?

Yes	No
GO to AH30.	REPAIR the short circuit. Clear the PCM DTCs. REPEAT the self-test.

AH30 CHECK THE FCV CIRCUIT FOR A SHORT TO VOLTAGE

Ignition ON, engine OFF.

Measure the voltage between:

(+) Cooling Fan Connector, Harness Side	(-)
FCV - Pin 6	Ground

Is any voltage present?

Yes	No
REPAIR the short circuit. Clear the PCM DTCs. REPEAT the self-test.	GO to AH31.

AH31 CHECK THE COOLING FAN RESISTANCE

Ignition OFF.
Cooling Fan connector disconnected.

Measure the resistance between:

(+) Cooling Fan Connector, Component Side	(-) Cooling Fan Connector, Component Side
VPWR - Pin 1	FCV - Pin 6

Is the resistance between 9 - 14 ohms?

Yes	No
GO to AH32.	INSTALL a new Cooling Fan. REFER to the Engine Cooling article, Cooling Fan. Clear the PCM DTCs. REPEAT the self-test.

AH32 CHECK THE FCV CIRCUIT FOR AN INTERNAL SHORT TO GROUND

Measure the resistance between:

(+) Cooling Fan Connector, Component Side	(-)
FCV - Pin 6	Ground

Is the resistance greater than 10K ohms?

Yes	No
GO to PINPOINT TEST ZZ .	INSTALL a new Cooling Fan. REFER to the Engine Cooling article, Cooling Fan. Clear the PCM DTCs. REPEAT the self-test.

AH33 CHECK THE COOLING FAN OPERATION

Ignition ON, engine running.
Access the PCM and monitor the FANSS (RPM) and RPM (RPM) PIDs.
Engine at normal operating temperature.
Access the PCM and control the RPM_DSD (RPM) PID.
Increase and maintain the engine speed to 2, 500 RPM.
Access the PCM and control the FANDC (PER) PID.
Command the cooling fan duty cycle to 0%.
Allow the fan speed to stabilize below 600 RPM.

Does the fan speed stabilize less than 600 RPMs before two minutes?

Yes	No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. Clear the PCM DTCs. REPEAT the self-test.	INSTALL a new Cooling Fan Clutch. REFER to the Engine Cooling article, Cooling Fan. Clear the PCM DTCs. REPEAT the self-test.

AH34 CHECK COOLING FAN OPERATION

Ignition ON, engine running.
Access the PCM and monitor the FANSS (RPM) and RPM (RPM) PIDs.
Engine at normal operating temperature.
Access the PCM and control the RPM_DSD (RPM) PID.
Increase and maintain the engine speed to 2, 500 RPM.
Access the PCM and control the FANDC (PER) PID.
Command the cooling fan duty cycle to 70%.
Allow the fan speed to stabilize above 2, 800 RPM.

Is the fan speed greater than 2, 800 RPMs and less than 3, 600 RPMs within 30 seconds?

Yes	No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. Clear the PCM DTCs. REPEAT the self-test.	INSTALL a new Cooling Fan Clutch. REFER to the Engine Cooling article, Cooling Fan. Clear the PCM DTCs. REPEAT the self-test.

AH35 CHECK FOR CORRECT PCM OPERATION

Disconnect all PCM connectors.
Visually inspect for:
- pushed out pins
- corrosion
Connect all the PCM connectors and make sure they seat correctly.
Carry out the PCM self-test.
Verify the concern is still present.

Is the concern still present?

Yes	No
INSTALL a new PCM. REFER to FLASH ELECTRICALLY ERASABLE PROGRAMMABLE READ ONLY MEMORY (EEPROM) .	The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.

RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.