SRX AWD V6-3.0L (2010)
Seat Heater: Testing and Inspection
Front Heated Seat Malfunction (With Memory A45)
Front Heated Seat Malfunction (With Memory A45)
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 front passenger heated seats are controlled by separate heated seat switches that are located in the radio/HVAC controls. When a heated
seat switch is pressed, a serial data message is sent from the radio/HVAC controls to the HVAC control module indicating the heated seat command. The
HVAC control module serves as a gateway to transmit the message to the seat memory control module via the serial data line. In response to this
message, the seat memory control module applies battery voltage through the element supply voltage circuit to the appropriate seat heating elements. The
seat memory control module then sends a serial data message back to the HVAC control module to gateway the information to the radio/HVAC controls
to either illuminate or turn off the appropriate temperature indicator.
Reference Information
Schematic Reference
Heated/Cooled Seat Schematics (See: Diagrams/Electrical Diagrams)
Connector End View Reference
Component Connector End Views (See: Diagrams/Connector Views/Connector End Views By Name)
Description and Operation
Heated/Vented Seat Description and Operation (See: Description and Operation/Heated/Vented Seat)
Electrical Information Reference
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Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit
Testing/Circuit Testing)
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Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Connector
