PINPOINT TEST P : The Blower Motor Does Not Operate Correctly

P1 CHECK THE HVAC MODULE FOR DTCs
- Ignition ON.
- Using a scan tool, perform the HVAC module self-test.
Is DTC B10B9:12 present?

Yes GO to P7.

No GO to P2.

P2 CHECK THE BLOWER MOTOR OPERATION USING ACTIVE COMMANDS

Using a scan tool, view HVAC Module PIDs.

Select panel mode on the HVAC controls.

Select the lowest blower motor setting.

Monitor blower motor speed while using the scan tool to operate the HVAC module active command BLOWRSPD, increasing and decreasing the percentage value.

Does the blower motor speed change between low and high when the active command is changed?

Yes	INSTALL a new FCIM. For Premium, REFER to Information and Entertainment Systems - Premium . For Premium Plus, REFER to Information and Entertainment Systems - Premium Plus . For Sony® Sound, REFER to Information and Entertainment Systems - Sony Sound .
No	GO to P3.

P3 CHECK THE BLOWER MOTOR RELAY COIL SWITCH GROUND CIRCUIT FOR A SHORT TO GROUND

Ignition OFF.

Disconnect: Blower Motor Relay.

Disconnect: HVAC Module C228A.

Measure:

Positive Lead	Measurement / Action	Negative Lead
Blower Motor Relay Socket Pin 1 Courtesy of FORD MOTOR COMPANY	Courtesy of FORD MOTOR COMPANY	Ground

Is the resistance greater than 10, 000 ohms?

Yes	GO to P4.
No	REPAIR the circuit.

P4 CHECK THE BLOWER MOTOR VOLTAGE CIRCUIT FOR A SHORT TO VOLTAGE

Disconnect: Blower Motor.

Ignition ON.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C2004-1	Courtesy of FORD MOTOR COMPANY	Ground

Is any voltage present?

Yes	GO to P5.
No	GO to P6.

P5 CHECK FOR VOLTAGE AT THE BLOWER MOTOR WITH THE BLOWER MOTOR RELAY DISCONNECTED

Disconnect: Blower Motor.

Ignition ON.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C2004-1	Courtesy of FORD MOTOR COMPANY	Ground

Is any voltage present?

Yes	REPAIR the circuit.
No	INSTALL a new blower motor relay.

P6 CHECK THE BLOWER MOTOR SPEED CONTROLLER FUNCTIONALITY

Ignition OFF.

Install a known good blower motor speed controller.

Ignition ON.

Operate the blower motor.

Does the blower motor function correctly?

Yes	INSTALL a new blower motor speed controller. REFER to Climate Control - DATC .
No	GO to P8.

P7 CHECK THE BLOWER MOTOR SPEED CONTROL COMMAND CIRCUIT FOR A SHORT TO VOLTAGE

Ignition OFF.

Disconnect: Blower Motor Speed Control.

Disconnect: HVAC Module C228A.

Ignition ON.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C271-3	Courtesy of FORD MOTOR COMPANY	Ground

Is any voltage present?

Yes	REPAIR the circuit.
No	CONNECT blower motor speed control. GO to P8.

P8 CHECK FOR CORRECT HVAC MODULE OPERATION

Ignition OFF.

Disconnect and inspect all HVAC module 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 HVAC module 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 TSBs. If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no TSBs address this concern, INSTALL a new HVAC module. Refer to Heating Ventilation Air Conditioning (HVAC) 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.

Yes	GO to P7.
No	GO to P2.