Cobalt L4-2.2L (2008)
Seat Heater: Symptom Related Diagnostic Procedures
Symptoms - Seat Heating and Cooling
Symptoms - Seat Heating and Cooling
Important: Review the system description in order to familiarize yourself with the system functions. Refer to Heated Seats Description and
Operation.
Visual/Physical Inspection
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Inspect for aftermarket devices which could affect the operation of the heated seat system.
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Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.
Intermittent
Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for Intermittent Conditions and Poor Connections.
See: Testing and Inspection/Component Tests and General Diagnostics
Symptom List
Refer to Heated Seat Inoperative in order to diagnose the symptom.
Heated Seat Inoperative
Heated Seat Inoperative
Diagnostic Instructions
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Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. See: Testing and Inspection/Initial Inspection and
Diagnostic Overview/Diagnostic System Check - Vehicle
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Review Strategy Based Diagnosis for an overview of the diagnostic approach.
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Diagnostic Procedure Instructions provides an overview of each diagnostic category.
Diagnostic Fault Information
Circuit/System Description
Battery positive voltage is supplied at all times to the heated seat module through the battery positive voltage circuit and the HTD SEATS fuse located in
the underhood fuse block. When commanded ON, the heated seat module uses this voltage to heat the seat heating elements. The heated seat module and
the seat heating elements are grounded through the module ground circuit to G301.
When the heated seat switch is placed in either the high or low temperature position, battery positive voltage is applied through the heated seat switch
signal circuit to the heated seat module. At the same time, battery voltage is also applied through one of two resistors in the switch and the heated seat
