2010 Cadillac Truck SRX FWD V6-3.0L Page 507
Circuit/System Description
The heated seat temperature sensor that set this diagnostic trouble code (DTC) is located in the seat cushion just under the seat cover with the seat
heating element. The seat heating control module supplies a 5 V reference voltage through the temperature sensor signal circuit and a ground
through the low reference circuit to the sensor. The module monitors the voltage of the sensor signal circuit to determine the temperature of the
seat. The temperature sensor varies in resistance based on the temperature of the heating element causing the signal voltage to change. Once the seat
reaches the set temperature, the module will then cycle the control circuit of the heating elements ON and OFF in order to maintain the desired seat
temperature based on the feedback voltage from the sensor.
Conditions for Running the DTC
* DTC B1325 must not be present.
* The seat heating control module must be powered.
Conditions for Setting the DTC
B1925 02 or B2170 02
The temperature sensor voltage drops below 0.6 V for more than 1 second.
B1925 05 or B2170 05
The temperature sensor voltage is greater than 5 V for more than 1 second.
Action Taken When the DTC Sets
The heated seat function for the affected seat will be disabled.
Conditions for Clearing the DTC
* The current DTC will clear and set the code to history 3 seconds after the reference voltage returns to normal operating range and the ignition
is cycled OFF then back to ACC or RUN.
* The history DTC will clear after 40 consecutive fault-free ignition cycles have occurred.
Reference Information
Schematic Reference
Heated/Cooled Seat Schematics (See: Body and Frame/Seats/Seat Temperature Element/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: Body and Frame/Seats/Seat Temperature Element/Description and Operation/Heated/Vented
Seat)
Electrical Information Reference
* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit
Testing/Circuit Testing)
* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic
Procedures/Connector Repairs/Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General
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