Friday, July 30, 2021

2010 Cadillac Truck SRX FWD V6-3.0L Page 507

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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