NOTE: A crushed seat backrest foam pad may be the cause of the fault, making it necessary to occupy the seat to recreate and identify the fault. Attempt to recreate the fault. Start the vehicle and set the driver seat to HIGH heat for at least 15 minutes while occupying the seat.
Do the Parameter Identifications (PIDs) increase incrementally (gradually) and stay within 15° C (27° F) of each other?
Yes | Fault not present at this time. Fault may have been set due to a past failure, incorrect use of the climate controlled seat system by repeated switching between heat and cool modes or due to excessive passenger compartment temperature. |
|---|---|
No | If the BKTMP PID increases incrementally and is greater than 15° C (27° F) of the CSHTEMP PID, GO to AG6 If the BKTMP PID increases quickly (temperature "jumps" and does not increase incrementally) and is greater than 15° C (27° F) of the CSHTEMP PID, GO to AG16 |
AG6 COMPARE OPERATION OF THE DRIVER AND PASSENGER SEATS
With the engine running, set both front seats to HIGH cool. Note the airflow exhausting from the driver seat backrest blower motor and compare it to the airflow exhausting from the passenger seat backrest blower motor. Carry out a wiggle test of the wire harnesses between the SCME and the driver seat backrest blower motor while monitoring blower operation. The blower should operate consistently and not change speeds.
Is the airflow exhausting from the driver seat backrest blower motor comparable to the airflow exhausting from the passenger seat backrest blower motor with no change in operation when carrying out the wiggle test?
Yes | GO to AG7 |
|---|---|
No | If the airflow exhausting from the driver seat backrest blower motor is not comparable to the airflow exhausting from the passenger seat backrest blower motor, GO to AG8 If the driver seat backrest blower motor operation changed while carrying out the wiggle test, IDENTIFY and REPAIR the wiring fault. |
AG7 COMPARE OPERATION OF THE DRIVER AND PASSENGER SEATS WHILE OCCUPIED
Note the airflow exhausting from the driver seat backrest blower motor with the driver seat occupied and compare it to the airflow exhausting from the passenger seat backrest blower motor with the passenger seat occupied.
Is the airflow exhausting from the driver seat backrest blower motor comparable to the airflow exhausting from the passenger seat backrest blower motor?
Yes | GO to AG16 |
|---|---|
No | INSTALL a new driver seat backrest foam pad. |
AG8 CHECK THE DRIVER SEAT BACKREST BLOWER FOR AN OBSTRUCTION OR RESTRICTED FILTER
Ignition OFF. Inspect the blower of the driver seat backrest blower motor assembly for an obstruction or for a restricted filter.
Is the blower obstructed or the filter restricted?
Yes | REMOVE the obstruction or INSTALL a new driver seat cushion blower motor. REFER to: Front Seat Cushion Blower Motor (501-10A Front Seats, Removal and Installation). |
|---|---|
No | GO to AG9 |
AG9 CHECK THE DRIVER SEAT BACKREST BLOWER SPEED CONTROL CIRCUIT FOR AN OPEN
REFER to: Supplemental Restraint System (SRS) Depowering (501-20B Supplemental Restraint System, General Procedures). Disconnect: Driver Side Airbag In-line C345. Disconnect: Passenger Side Airbag In-line C219. Disconnect: SCME C3265C. Disconnect: Driver Seat Backrest Blower Motor C3034. Measure:
Click to display connectors
Positive Lead | Measurement / Action | Negative Lead |
|---|---|---|
C3265C-12 | C3034-7 |
Is the resistance less than 3 ohms?
Yes | GO to AG10 |
|---|---|
No | REPAIR the circuit. GO to AG22 |
AG10 CHECK THE DRIVER SEAT BACKREST BLOWER CIRCUIT FOR A SHORT TO VOLTAGE
Ignition ON. Measure:
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.