Pinpoint Test Kn: Variable Speed Electric Cooling Fan Motor

Normal Operation and Fault Conditions

Refer to the DTC Fault Trigger Conditions.

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Condition
PCM P0480:00	Fan 1 Control Circuit: No Sub Type Information	Sets if the PCM detects the voltage on the fan control variable (FCV) circuit is not within the expected range.

Possible Causes

Cooling fan circuitry concern
Cooling fan relay
Cooling fan clutch solenoid
Cooling fan module (8B658)
Cooling fan assembly (8C607)
PCM (12A650)

KN1 CHECK FOR DIAGNOSTIC TROUBLE CODES (DTC (DIAGNOSTIC TROUBLE CODE))
- NOTE: Check all the cooling fan system fuses. If any cooling fan system fuse is damaged, install all new cooling fan fuses and check the cooling fan system for normal operation before continuing with the pinpoint test.
Is DTC P0480 present?

Yes GO to KN4.

No For symptoms without DTCs: GO to KN2.
For all others:
REFER to the Symptom Charts for further direction.

KN2 VERIFY A/C STATUS
- Verify the A/C system is OFF.
- Start the engine.
Access the PCM and monitor the AC_REQ (Status) PID

Is A/C being requested?

Yes REFER to DIAGNOSIS AND TESTING , to diagnose the A/C system.

No For electric cooling fan (s) always on: GO to KN3.
For all others: GO to KN4.

KN3 CHECK THE AIR CONDITIONING PRESSURE TRANSDUCER SENSOR
- Ignition OFF.
- Disconnect ACP Sensor connector.
- Start the engine.
Does the cooling fan turn off?

Yes REFER to DIAGNOSIS AND TESTING to diagnose the Air Conditioning Pressure (ACP) Sensor.

No GO to KN4.

KN4 COMMAND THE COOLING FAN ON TO CHECK OPERATION
- NOTE: Applying battery voltage to the cooling fan motor circuits may damage the cooling fan.
- NOTE: Some vehicles have more than one cooling fan. Make sure both cooling fans operate correctly.
- Ignition OFF.
- Disconnect CF Module connector.
- Disconnect CF Motor connector.
- Disconnect Cooling Fan Motor 1 connector.
- Disconnect Cooling Fan Motor 2 connector.
- Visually inspect all the connectors for damage, corrosion and pushed out pins.
- Connect CF Module connector.
- Connect CF Motor connector.
- Connect Cooling Fan Motor 1 connector.
- Connect Cooling Fan Motor 2 connector.
- Ignition ON.
Access the PCM and control the FAN_DSD (Percentage, %) PID
- Command the fan to full ON.
- Access the PCM and monitor the FANELC_CMD PID.
- The FANELC_CMD PID value should be greater than 80%.
- Wait 30 seconds for the cooling fan to respond to the commanded speed.
Does the cooling fan continue to run after 30 seconds?

Yes The concern is elsewhere. REFER to the Symptom Charts for further direction.

No GO to KN5.

KN5 CHECK THE VOLTAGE TO THE COOLING FAN

NOTE: Not all vehicles have all components listed.

Ignition OFF.

For Transit Connect,

Disconnect CF Module connector.

Ignition ON.

Measure the voltage between:

Positive Lead	Measurement / Action	Negative Lead
FANPWR Pin 1CF Module Connector	Courtesy of FORD MOTOR COMPANY	Courtesy of FORD MOTOR COMPANY

For all others,

Disconnect Cooling Fan Motor 1 connector.

Disconnect Cooling Fan Motor 2 connector.

Ignition ON.

Measure the voltage between:

Positive Lead	Measurement / Action	Negative Lead
FANPWR#brushless Pin 1Cooling Fan Motor 1 Connector	Courtesy of FORD MOTOR COMPANY	Courtesy of FORD MOTOR COMPANY

Measure the voltage between:

Positive Lead	Measurement / Action	Negative Lead
FANPWR#brushlessCooling Fan Motor 2 Connector Refer to the appropriate Wiring Diagrams	Courtesy of FORD MOTOR COMPANY	Courtesy of FORD MOTOR COMPANY

Is the voltage greater than 10.5 V?

Yes	For Bronco Sport, Corsair, Edge, Escape/Kuga, Expedition, Maverick, Nautilus, Navigator, Ranger and Transit Connect: GO to KN14. For all others: GO to KN9.

No	For Bronco Sport, Corsair, Edge, Escape/Kuga, Expedition, Maverick, Nautilus, Navigator, Ranger and Transit Connect: GO to KN13. For all others: GO to KN6.

KN6 CHECK FOR VOLTAGE TO THE RELAY

NOTE: Not all vehicles have all components listed.

Ignition OFF.

Disconnect FC1 Relay connector.

Disconnect FC2 Relay connector.

Ignition ON.

Measure the voltage between:

Positive Lead	Measurement / Action	Negative Lead
B+#brushless Pin 3FC1 Relay Connector	Courtesy of FORD MOTOR COMPANY	Courtesy of FORD MOTOR COMPANY
VPWR#brushless Pin 1FC1 Relay Connector	Courtesy of FORD MOTOR COMPANY	Courtesy of FORD MOTOR COMPANY

Measure the voltage between:

Positive Lead	Measurement / Action	Negative Lead
B+#brushless FC2 Relay Connector Refer to the appropriate Wiring Diagrams	Courtesy of FORD MOTOR COMPANY	Courtesy of FORD MOTOR COMPANY
VPWR#brushless FC2 Relay Connector Refer to the appropriate Wiring Diagrams	Courtesy of FORD MOTOR COMPANY	Courtesy of FORD MOTOR COMPANY

Is the voltage greater than 10.5 V?

Yes	GO to KN7.

No	REPAIR the open circuit. Clear the PCM DTCs. REPEAT the self-test.

KN7 CHECK THE RELAY
- Carry out the Relay Component Test. Refer to Component Testing.
Is a concern present?

Yes INSTALL a new FC relay in question.Clear the PCM DTCs. REPEAT the self-test.

No GO to KN8.

KN8 CHECK THE RELAY GROUND

NOTE: Not all vehicles have all components listed.

Ignition OFF.

Measure the resistance between:

Positive Lead	Measurement / Action	Negative Lead
GND#brushless Pin 2FC1 Relay Connector	Courtesy of FORD MOTOR COMPANY	Courtesy of FORD MOTOR COMPANY

Measure the resistance between:

Positive Lead	Measurement / Action	Negative Lead
GND#brushlessFC2 Relay Connector Refer to the appropriate Wiring Diagrams	Courtesy of FORD MOTOR COMPANY	Courtesy of FORD MOTOR COMPANY

Is the resistance less than 5 Ohm??

Yes	GO to KN9.

No	REPAIR the open circuit. Clear the PCM DTCs. REPEAT the self-test.

KN9 CHECK FOR AN OPEN CIRCUIT

NOTE: Not all vehicles have all components listed.

Ignition OFF.

Disconnect PCM connector.

Measure the resistance between:

Positive Lead	Measurement / Action	Negative Lead
GND#brushless Pin 2Cooling Fan Motor 1 Connector	Courtesy of FORD MOTOR COMPANY	Courtesy of FORD MOTOR COMPANY

Measure the resistance between:

Positive Lead	Measurement / Action	Negative Lead
FCV#brushless Pin 4Cooling Fan Motor 1 Connector	Courtesy of FORD MOTOR COMPANY	1.5L EcoBoost (129kW/175PS) (CR), 1.5L EcoBoost (132kW/180PS) - I3 (Y1), 2.0L EcoBoost (184kW/250PS) - MI4, 2.0L EcoBoost (177kW/240PS) - MI4: FCV#brushless Pin B19PCM Connector 2.5L Duratec - Hybrid (121kW/164PS) (BG) 2.5L Duratec - Hybrid (FHEV 148kW/201PS, PHEV 165kW/225PS) (BG): FCV#brushless Pin BH3PCM Connector

Measure the resistance between:

Positive Lead	Measurement / Action	Negative Lead
FANPWR#brushless Pin 1Cooling Fan Motor 1 Connector	Courtesy of FORD MOTOR COMPANY	FANPWR#brushless Pin 5FC1 Relay Connector

Measure the resistance between:

Positive Lead	Measurement / Action	Negative Lead
GND#brushlessCooling Fan Motor 2 Connector Refer to the appropriate Wiring Diagrams	Courtesy of FORD MOTOR COMPANY	Courtesy of FORD MOTOR COMPANY

Measure the resistance between:

Positive Lead	Measurement / Action	Negative Lead
FCV#brushlessCooling Fan Motor 2 Connector Refer to the appropriate Wiring Diagrams	Courtesy of FORD MOTOR COMPANY	1.5L EcoBoost (129kW/175PS) (CR), 1.5L EcoBoost (132kW/180PS) - I3 (Y1), 2.0L EcoBoost (184kW/250PS) - MI4, 2.0L EcoBoost (177kW/240PS) - MI4: FCV#brushless Pin B19PCM Connector 2.5L Duratec - Hybrid (121kW/164PS) (BG) 2.5L Duratec - Hybrid (FHEV 148kW/201PS, PHEV 165kW/225PS) (BG): FCV#brushless Pin BH3PCM Connector

Measure the resistance between:

Positive Lead	Measurement / Action	Negative Lead
FANPWR# brushless Cooling Fan Motor 2 Connector Refer to the appropriate Wiring Diagrams	Courtesy of FORD MOTOR COMPANY	FANPWR# brushless FC2 Relay Connector Refer to the appropriate Wiring Diagrams

Are the resistances less than 5 ohms?

Yes	GO to KN10.

No	REPAIR the open circuit. Clear the PCM DTCs. REPEAT the self-test.

KN10 CHECK THE FCV#2 CIRCUIT FOR A SHORT TO GROUND

NOTE: Not all vehicles have all components listed.

Measure the resistance between:

Positive Lead	Measurement / Action	Negative Lead
FCV#brushless Pin 4Cooling Fan Motor 1 Connector	Courtesy of FORD MOTOR COMPANY	Courtesy of FORD MOTOR COMPANY

Measure the resistance between:

Positive Lead	Measurement / Action	Negative Lead
FCV#brushlessCooling Fan Motor 2 Connector Refer to the appropriate Wiring Diagram	Courtesy of FORD MOTOR COMPANY	Courtesy of FORD MOTOR COMPANY

Are the resistances greater than 10k ohms?

Yes	GO to KN11.

No	REPAIR the short circuit. Clear the PCM DTCs. REPEAT the self-test.

KN11 CHECK THE FCV#2 CIRCUIT FOR A SHORT TO VOLTAGE

Not all vehicles have all components listed.

Ignition ON.

Measure the voltage between:

Positive Lead	Measurement / Action	Negative Lead
FCV#brushless Pin 4Cooling Fan Motor 1 Connector	Courtesy of FORD MOTOR COMPANY	Courtesy of FORD MOTOR COMPANY

Measure the voltage between:

Positive Lead	Measurement / Action	Negative Lead
FCV#brushlessCooling Fan Motor 2 Connector Refer to the appropriate Wiring Diagrams	Courtesy of FORD MOTOR COMPANY	Courtesy of FORD MOTOR COMPANY

Is any voltage present?

Yes	REPAIR the short circuit. Clear the PCM DTCs. REPEAT the self-test.

No	GO to KN12.

KN12 CHECK THE FCV#2 CIRCUITS FOR INTERMITTENT CONCERNS

NOTE: Some vehicles have more than one cooling fan. Make sure both cooling fans operate correctly.

NOTE: Not all vehicles have all components listed.

Ignition OFF.

Disconnect CF Module connector.

Disconnect CF Motor connector.

Disconnect Cooling Fan Motor 1 connector.

Disconnect Cooling Fan Motor 2 connector.

Visually inspect all connectors for:
- pushed out pins
- corrosion

Connect CF Module connector.

Connect CF Motor connector.

Connect Cooling Fan Motor 1 connector.

Connect Cooling Fan Motor 2 connector.

Connect PCM connector.

Connect FC Relay connector.

Connect FC1 Relay connector.

Connect FC2 Relay connector.

Ignition ON.

Access the PCM and control the FAN_DSD (Percentage, %) PID

Command the fan to full ON.

Access the PCM and monitor the FANELC_CMD PID.

The FANELC_CMD PID value should be greater than 80%.

Wait 30 seconds for the cooling fan to respond to the commanded speed.

While observing the fan, wiggle, shake, and bend small sections of the wiring harness while working from the cooling fan to the PCM.

Is a concern present?

Yes	REPAIR as necessary. If a wiring concern is not present, INSTALL a new cooling fan. REFER to the Cooling Fan Motor and Shroud . Clear the PCM DTCs. REPEAT the self-test.

No	The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.

KN13 CHECK THE RELAY GROUND CIRCUIT

NOTE: Not all vehicles have all components listed.

Ignition OFF.

Disconnect FC1 Relay connector.

Disconnect FC2 Relay connector.

Disconnect FC3 Relay connector.

Disconnect BJB-B connector.

Disconnect BJB-C connector.

For Edge, Nautilus and Ranger.

Measure the resistance between:

Positive Lead	Measurement / Action	Negative Lead
GND#brushless Pin 2FC1 Relay Connector	Courtesy of FORD MOTOR COMPANY	Courtesy of FORD MOTOR COMPANY

Measure the resistance between:

Positive Lead	Measurement / Action	Negative Lead
GND#brushlessFC2 Relay Connector Refer to the appropriate Wiring Diagrams	Courtesy of FORD MOTOR COMPANY	Courtesy of FORD MOTOR COMPANY

Measure the resistance between:

Positive Lead	Measurement / Action	Negative Lead
GND#brushlessFC3 Relay Connector Refer to the appropriate Wiring Diagrams	Courtesy of FORD MOTOR COMPANY	Courtesy of FORD MOTOR COMPANY

For Expedition and Navigator,

Measure the resistance between:

Positive Lead	Measurement / Action	Negative Lead
GND#brushlessBJB-C Connector Refer to the appropriate Wiring Diagrams	Courtesy of FORD MOTOR COMPANY	Courtesy of FORD MOTOR COMPANY

For all others,

Measure the resistance between:

Positive Lead	Measurement / Action	Negative Lead
GND#brushless Pin 3BJB-B Connector	Courtesy of FORD MOTOR COMPANY	Courtesy of FORD MOTOR COMPANY

Is the resistance less than 5 Ohm??

Yes	GO to KN14.

No	REPAIR the open circuit. Clear the PCM DTCs. REPEAT the self-test.

KN14 CHECK FOR AN OPEN

Ignition OFF.

Disconnect PCM connector.

Disconnect BJB-A connector.

Disconnect BJB-B connector.

Disconnect BJB-C connector.

For Edge, Nautilus and Ranger.

Measure the resistance between:

Positive Lead	Measurement / Action	Negative Lead
GND#brushless Pin 2Cooling Fan Motor 1 Connector	Courtesy of FORD MOTOR COMPANY	Courtesy of FORD MOTOR COMPANY

Measure the resistance between:

Positive Lead	Measurement / Action	Negative Lead
FCV#brushless Pin 4Cooling Fan Motor 1 Connector	Courtesy of FORD MOTOR COMPANY	1.5L EcoBoost (129kW/175PS) (CR), 1.5L EcoBoost (132kW/180PS) - I3 (Y1), 2.0L EcoBoost (184kW/250PS) - MI4, 2.0L EcoBoost (177kW/240PS) - MI4: FCV#brushless Pin B19PCM Connector 2.5L Duratec - Hybrid (121kW/164PS) (BG) 2.5L Duratec - Hybrid (FHEV 148kW/201PS, PHEV 165kW/225PS) (BG): FCV#brushless Pin BH3PCM Connector

Measure the resistance between:

Positive Lead	Measurement / Action	Negative Lead
FANPWR#brushless Pin 1Cooling Fan Motor 1 Connector	Courtesy of FORD MOTOR COMPANY	FANPWR#brushless Pin 5FC1 Relay Connector

Measure the resistance between:

Positive Lead	Measurement / Action	Negative Lead
GND#brushlessCooling Fan Motor 2 Connector Refer to the appropriate Wiring Diagrams	Courtesy of FORD MOTOR COMPANY	Courtesy of FORD MOTOR COMPANY

Measure the resistance between:

Positive Lead	Measurement / Action	Negative Lead
FCV#brushlessCooling Fan Motor 2 Connector Refer to the appropriate Wiring Diagrams	Courtesy of FORD MOTOR COMPANY	1.5L EcoBoost (129kW/175PS) (CR), 1.5L EcoBoost (132kW/180PS) - I3 (Y1), 2.0L EcoBoost (184kW/250PS) - MI4, 2.0L EcoBoost (177kW/240PS) - MI4: FCV#brushless Pin B19PCM Connector 2.5L Duratec - Hybrid (121kW/164PS) (BG) 2.5L Duratec - Hybrid (FHEV 148kW/201PS, PHEV 165kW/225PS) (BG): FCV#brushless Pin BH3PCM Connector

Measure the resistance between:

Positive Lead	Measurement / Action	Negative Lead
FANPWR#brushlessCooling Fan Motor 2 Connector Refer to the appropriate Wiring Diagrams	Courtesy of FORD MOTOR COMPANY	FANPWR#brushlessFC2 Relay Connector Refer to the appropriate Wiring Diagrams

Measure the resistance between:

Positive Lead	Measurement / Action	Negative Lead
FANPWR#brushlessCooling Fan Motor 2 Connector Refer to the appropriate Wiring Diagrams	Courtesy of FORD MOTOR COMPANY	FANPWR#brushlessFC3 Relay Connector Refer to the appropriate Wiring Diagrams

For Expedition and Navigator,

Measure the resistance between:

Positive Lead	Measurement / Action	Negative Lead
GND#brushless Pin 2Cooling Fan Motor 1 Connector	Courtesy of FORD MOTOR COMPANY	Courtesy of FORD MOTOR COMPANY

Measure the resistance between:

Positive Lead	Measurement / Action	Negative Lead
FCV#brushless Pin 4Cooling Fan Motor 1 Connector	Courtesy of FORD MOTOR COMPANY	1.5L EcoBoost (129kW/175PS) (CR), 1.5L EcoBoost (132kW/180PS) - I3 (Y1), 2.0L EcoBoost (184kW/250PS) - MI4, 2.0L EcoBoost (177kW/240PS) - MI4: FCV#brushless Pin B19PCM Connector 2.5L Duratec - Hybrid (121kW/164PS) (BG) 2.5L Duratec - Hybrid (FHEV 148kW/201PS, PHEV 165kW/225PS) (BG): FCV#brushless Pin BH3PCM Connector

Measure the resistance between:

Positive Lead	Measurement / Action	Negative Lead
FANPWR#brushless Pin 1Cooling Fan Motor 1 Connector	Courtesy of FORD MOTOR COMPANY	FANPWR#brushless Pin 20BJB-B Connector

Measure the resistance between:

Positive Lead	Measurement / Action	Negative Lead
GND#brushless Cooling Fan Motor 2 Connector Refer to the appropriate Wiring Diagrams	Courtesy of FORD MOTOR COMPANY	Courtesy of FORD MOTOR COMPANY

Measure the resistance between:

Positive Lead	Measurement / Action	Negative Lead
FCV#brushlessCooling Fan Motor 2 Connector Refer to the appropriate Wiring Diagrams	Courtesy of FORD MOTOR COMPANY	1.5L EcoBoost (129kW/175PS) (CR), 1.5L EcoBoost (132kW/180PS) - I3 (Y1), 2.0L EcoBoost (184kW/250PS) - MI4, 2.0L EcoBoost (177kW/240PS) - MI4: FCV#brushless Pin B19PCM Connector 2.5L Duratec - Hybrid (121kW/164PS) (BG) 2.5L Duratec - Hybrid (FHEV 148kW/201PS, PHEV 165kW/225PS) (BG): FCV#brushless Pin BH3PCM Connector

Measure the resistance between:

Positive Lead	Measurement / Action	Negative Lead
FANPWR#brushlessCooling Fan Motor 2 Connector Refer to the appropriate Wiring Diagrams	Courtesy of FORD MOTOR COMPANY	FANPWR#fan2BJB-C Connector Refer to the appropriate Wiring Diagrams

For Transit Connect,

Measure the resistance between:

Positive Lead	Measurement / Action	Negative Lead
GND Pin 2CF Module Connector	Courtesy of FORD MOTOR COMPANY	Courtesy of FORD MOTOR COMPANY

Measure the resistance between:

Positive Lead	Measurement / Action	Negative Lead
FCV#2 Pin 4CF Module Connector	Courtesy of FORD MOTOR COMPANY	FCV#2PCM Connector

Measure the resistance between:

Positive Lead	Measurement / Action	Negative Lead
FANPWR Pin 1CF Module Connector	Courtesy of FORD MOTOR COMPANY	FANPWR#brushlessBJB-A Connector

For all others,

Measure the resistance between:

Positive Lead	Measurement / Action	Negative Lead
GND#brushless Pin 2Cooling Fan Motor 1 Connector	Courtesy of FORD MOTOR COMPANY	Courtesy of FORD MOTOR COMPANY

Measure the resistance between:

Positive Lead	Measurement / Action	Negative Lead
FCV#brushless Pin 4Cooling Fan Motor 1 Connector	Courtesy of FORD MOTOR COMPANY	1.5L EcoBoost (129kW/175PS) (CR), 1.5L EcoBoost (132kW/180PS) - I3 (Y1), 2.0L EcoBoost (184kW/250PS) - MI4, 2.0L EcoBoost (177kW/240PS) - MI4: FCV#brushless Pin B19PCM Connector 2.5L Duratec - Hybrid (121kW/164PS) (BG) 2.5L Duratec - Hybrid (FHEV 148kW/201PS, PHEV 165kW/225PS) (BG): FCV#brushless Pin BH3PCM Connector

Measure the resistance between:

Positive Lead	Measurement / Action	Negative Lead
FANPWR#brushless Pin 1Cooling Fan Motor 1 Connector	Courtesy of FORD MOTOR COMPANY	FANPWR#brushlessBJB-A Connector

Measure the resistance between:

Positive Lead	Measurement / Action	Negative Lead
FANPWR#brushless Pin 1Cooling Fan Motor 1 Connector	Courtesy of FORD MOTOR COMPANY	FANPWR#brushless Pin 20BJB-B Connector

Are the resistances less than 5 ohms?

Yes	GO to KN15.

No	REPAIR the open circuit. Clear the PCM DTCs. REPEAT the self-test.

KN15 CHECK THE FCV#2 FOR A SHORT TO GROUND

NOTE: Not all vehicles have all components listed.

For Transit Connect,

Measure the resistance between:

Positive Lead	Measurement / Action	Negative Lead
FCV#2 Pin 4CF Module Connector	Courtesy of FORD MOTOR COMPANY	Courtesy of FORD MOTOR COMPANY

For all others,

Measure the resistance between:

Positive Lead	Measurement / Action	Negative Lead
FCV#brushless Pin 4Cooling Fan Motor 1 Connector	Courtesy of FORD MOTOR COMPANY	Courtesy of FORD MOTOR COMPANY

Measure the resistance between:

Positive Lead	Measurement / Action	Negative Lead
FCV#brushlessCooling Fan Motor 2 Connector Refer to the appropriate Wiring Diagrams	Courtesy of FORD MOTOR COMPANY	Courtesy of FORD MOTOR COMPANY

Are the resistances greater than 10k ohms?

Yes	GO to KN16.

No	REPAIR the short circuit. Clear the PCM DTCs. REPEAT the self-test.

KN16 CHECK THE FCV#2 FOR A SHORT TO VOLTAGE

NOTE: Not all vehicles have all components listed.

Ignition ON.

For Transit Connect,

Measure the voltage between:

Positive Lead	Measurement / Action	Negative Lead
FCV#2 Pin 4CF Module Connector	Courtesy of FORD MOTOR COMPANY	Courtesy of FORD MOTOR COMPANY

For all others,

Measure the voltage between:

Positive Lead	Measurement / Action	Negative Lead
FCV#brushless Pin 4Cooling Fan Motor 1 Connector	Courtesy of FORD MOTOR COMPANY	Courtesy of FORD MOTOR COMPANY

Measure the voltage between:

Positive Lead	Measurement / Action	Negative Lead
FCV#brushlessCooling Fan Motor 2 Connector Refer to the appropriate Wiring Diagrams	Courtesy of FORD MOTOR COMPANY	Courtesy of FORD MOTOR COMPANY

Is any voltage present?

Yes	REPAIR the short circuit. Clear the PCM DTCs. REPEAT the self-test.

No	GO to KN17.

KN17 CHECK THE FCV#2 FOR INTERMITTENT CONCERNS

NOTE: Some vehicles have more than one cooling fan. Make sure both cooling fans operate correctly.

NOTE: Not all vehicles have all components listed.

Ignition OFF.

Disconnect BJB-A connector.

Disconnect BJB-B connector.

Disconnect BJB-C connector.

Disconnect Cooling Fan Motor 1 connector.

Disconnect Cooling Fan Motor 2 connector.

Visually inspect all connectors for:
- pushed out pins
- corrosion

Connect BJB-A connector.

Connect BJB-B connector.

Connect BJB-C connector.

Connect Cooling Fan Motor 1 connector.

Connect Cooling Fan Motor 2 connector.

Connect PCM connector.

Ignition ON.

Access the PCM and control the FAN_DSD (Percentage, %) PID

Command the fan to full ON.

Access the PCM and monitor the FANELC_CMD PID.

The FANELC_CMD PID value should be greater than 80%.

Wait 30 seconds for the cooling fan to respond to the commanded speed.

While observing the fan, wiggle, shake, and bend small sections of the wiring harness while working from the cooling fan to the PCM.

Is a concern present?

Yes	REPAIR as necessary. If a wiring concern is not present, INSTALL a new cooling fan. REFER to the Cooling Fan Motor and Shroud .Clear the PCM DTCs. REPEAT the self-test.

No	The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.