Pinpoint Test Ai : DTC B272F

WARNING: This page is about a different car, the 2018 Ford F-550 Super Duty, 2018 Ford F-450 Super Duty, 2018 Ford F-350 Super Duty, and 2018 Ford F-250 Super Duty. However, it is still accessible from the selected car via links, so may be relevant.

WARNING: Incorrect repair techniques or actions can cause an accidental Supplemental Restraint System (SRS) deployment. Never compromise or depart from these instructions. Failure to precisely follow all instructions could result in serious personal injury from an accidental deployment.

AI1 CHECK THE BLOWER MOTOR CIRCUITS FOR A SHORT TO VOLTAGE

REFER to: Supplemental Restraint System (SRS) Depowering .

Disconnect: Passenger Side Airbag In-line C3053 .

Disconnect: SCME C3265C .

Disconnect: Passenger Cushion Blower Motor C3040 .

Disconnect: Passenger Backrest Blower Motor C3039 .

Ignition ON.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C3265C-8	Courtesy of FORD MOTOR COMPANY	Ground
C3265C-7	Courtesy of FORD MOTOR COMPANY	Ground

Is any voltage present?

Yes	REPAIR the circuit in question. GO to AI5

GO to AI2

AI2 CHECK THE BLOWER MOTOR CIRCUITS FOR AN OPEN

Ignition OFF.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C3265C-8	Courtesy of FORD MOTOR COMPANY	C3040-3
C3265C-7	Courtesy of FORD MOTOR COMPANY	C3040-4

Are the resistances less than 3 ohms?

Yes

GO to AI3

No	REPAIR the circuit in question. GO to AI5

AI3 CHECK THE RESISTANCE OF THE CUSHION AND BACKREST BLOWER MOTORS

NOTE: The ohmmeter must be connected with the positive lead to pin 3 and the negative lead to pin 4 when measuring. Ohmmeter leads incorrectly connected results in false readings and leads to incorrect identification of components that are not faulty.

Measure the component side resistance between:

Positive Lead	Measurement / Action	Negative Lead
Courtesy of FORD MOTOR COMPANY C3040-3, Component Side	Courtesy of FORD MOTOR COMPANY	Courtesy of FORD MOTOR COMPANY C3040-4, Component Side

Measure the component side resistance between:

Positive Lead	Measurement / Action	Negative Lead
Courtesy of FORD MOTOR COMPANY C3039-3, Component Side	Courtesy of FORD MOTOR COMPANY	Courtesy of FORD MOTOR COMPANY C3039-4, Component Side

Are the resistances between 4, 000 and 10, 000 ohms?

Yes

GO to AI4

If the backrest blower motor resistance measurement failed, INSTALL a new backrest blower motor. Refer to: Front Seat Backrest Blower Motor . Go to AI5. If the cushion blower motor resistance measurement failed, INSTALL a new cushion blower motor. Refer to: Front Seat Cushion Blower Motor . Go to AI5

AI4 CHECK THE SCME (FRONT SEAT CLIMATE CONTROL MODULE) OPERATION

Ignition OFF.

Disconnect and inspect all of the SCME connectors.

Repair:
- corrosion (install new connector or terminals - clean module pins)
- damaged or bent pins - install new terminals/pins as necessary
- pushed-out pins - install new pins as necessary

Reconnect the SCME connectors. Make sure they seat and latch correctly.

NOTE: Do not reconnect Passenger Side Airbag In-line C3053 at this time.

Reconnect all previously disconnected connectors.

Ignition ON.

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 SCME. Refer to: Front Seat Climate Control Module [SCME] . Go to AI5

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. GO to AI5

AI5 VERIFY THE SRS (SUPPLEMENTAL RESTRAINT SYSTEM) PROVES OUT SUCCESSFULLY
- REFER to: Supplemental Restraint System (SRS) Depowering .
- Connect: Passenger Side Airbag In-line C3053 .
- Connect all previously disconnected connectors.
- REFER to: Supplemental Restraint System (SRS) Repowering .
Did the SRS prove out successfully?

Yes Repair is complete. RETURN the vehicle to the customer.

No REFER to: Airbag Supplemental Restraint System (SRS) .