CTS RWD V6-3.6L (2008)
Vented Seat Malfunction
Vented Seat Malfunction
Diagnostic Instructions
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Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
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Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
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Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure Instructions)
provides an overview of each diagnostic category.
Diagnostic Fault Information
Circuit/System Description
The driver and passenger vented seats are controlled by separate vented seat switches. Both switches are located in the climate control panel (CCP).
When a vented seat switch is pressed, the CCP sends a GMLAN message via the serial data line to the memory seat module (MSM) indicating the vented
seat command. In response to this message, the MSM then sends a pulse width modulation (PWM) signal through the vented seat mode signal circuit to
the appropriate seat blower motors indicating the vented seat command. In response to this signal, the logic in the blower motors set the blower speed to
the switch set point. Both blower motors then run drawing cabin air around and away from occupant.
Reference Information
Schematic Reference
Heated/Cooled Seat Schematics (See: Diagrams/Electrical Diagrams)
Connector End View Reference
Component Connector End Views (See: Diagrams/Connector Views)
Description and Operation
Heated/Vented Seat Description and Operation (See: Description and Operation)
Electrical Information Reference
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Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics)