Y4 CHECK THE SCME (FRONT SEAT CLIMATE CONTROL MODULE) OPERATION
Reconnect the SCME connectors. Make sure they seat and latch correctly.
NOTE: Do not reconnect Driver Side Airbag In-line C345 or Passenger Side Airbag In-line C219 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] (501-10A Front Seats, Removal and Installation). GO to Y5 |
|---|---|
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 Y5 |
Y5 VERIFY THE SUPPLEMENTAL RESTRAINT SYSTEM (SRS) PROVES OUT SUCCESSFULLY
REFER to: Supplemental Restraint System (SRS) Depowering (501-20B Supplemental Restraint System, General Procedures). Connect: Driver Side Airbag In-line C345. Connect: Passenger Side Airbag In-line C219. Connect all previously disconnected connectors.
REFER to: Supplemental Restraint System (SRS) Repowering (501-20B Supplemental Restraint System, General Procedures).
Did the SRS prove out successfully?
Yes | Repair is complete. RETURN the vehicle to the customer. |
|---|---|
No | REFER to: Airbag Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, Diagnosis and Testing). |
DTC B272A
Refer to Wiring Diagrams Cell 119 for schematic and connector information.
Normal Operation and Fault Conditions
The SCME monitors seat cushion temperature while it supplies voltage and ground to both blower motors. The SCME also supplies a variable voltage signal to control the blower speed. Cabin air enters the blower through a filter attached to the blower motor housing. Heated or cooled air exits the blower motor and flows through a duct to the foam pad.
DTC Fault Trigger Conditions
DTC | Description | Fault Trigger Conditions |
|---|---|---|
B272A Passenger Cushion Over-Temp Detected | If the passenger seat cushion blower motor temperature exceeds 70° C (158° F) in cool mode or 85° C (185° F) in heat mode for more than 4 seconds, the SCME shuts down the passenger seat system and sets this DTC. |
Possible Causes
Wiring, terminals or connectors Restricted blower motor filter Crushed or restricted cushion foam pad Cushion blower motor SCME
PINPOINT TEST Z : DTC B272A
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.
Z1 CHECK THE SCME (FRONT SEAT CLIMATE CONTROL MODULE) FOR ON-DEMAND DIAGNOSTIC TROUBLE CODES (DTCS)
Start the vehicle and set the passenger seat to HIGH heat. Using a diagnostic scan tool, perform the SCME self-test.
2016 Mustang workshop publication supplied to Mustang Atlas. Original technical text and illustrations; HTML formatting by Mustang Atlas. Source page numbering is retained for traceability. Follow the configuration, revision, warnings, and cross-references in the material. About this edition.