Interior, A/C - Seat Heater(s) Inoperative
TSB 09-4-803/09/09
INOPERATIVE HEATED SEAT(S) - BUILT
BEFORE 12/14/2007
FORD:
2005-2007 Five Hundred, Freestyle
2008 Taurus X, Taurus
MERCURY:
2005-2007 Montego
2008 Sable
ISSUE
Some 2005-2007 Freestyle, Five Hundred, Montego and 2008 Taurus, Sable and Taurus X vehicles built before 12/14/2007 may exhibit an inoperative heated seat(s). This concern may be caused by an intermittent open element in the heated seat mat.
ACTION
Follow the Service Procedure steps to correct the condition.
SERVICE PROCEDURE
The heated seat system is controlled by the heated seat module located underneath the front passenger seat cushion. The heated seat switches are part of the heating ventilation air conditioning (HVAC) module but the heated seat system operates independently from the climate control system. The heated seat module regulates seat temperature by monitoring resistance of a thermistor type thermostat located in the cushion heater mat. The heated seat module is designed to remain on, heating the seat and maintaining temperature until switched off. For vehicles built before 5/1/2006, the module will time-out and switch off after 10 minutes.
1. Refer to Workshop Manual (WSM), Section 501-10 for pin point test on inoperative heated seat(s).
a. When testing the heater mats resistance and circuits for an intermittent open, technicians should sit in the seat while testing the circuit resistance, move the seat in multiple seating positions and apply pressure to several areas of the heated seat mat to ensure the mat element is not open intermittently.
2. Refer to WSM 501-10 for heated seat element replacement when an open electrical circuit has been identified.
Parts Block
WARRANTY STATUS: Eligible Under Provisions Of New Vehicle Limited Warranty Coverage
IMPORTANT: Warranty coverage limits/policies are not altered by a TSB. Warranty coverage limits are determined by the identified causal part.
OPERATION DESCRIPTION TIME
MT090408 Use SLTS Operations If Actual
Available Or Labor Time
Performed As Actual Time
DEALER CODING
CONDITION
BASIC PART NO. CODE
14D696 28
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