2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 515
DTC B1925 or B2170 (Without Memory A45)
Diagnostic Instructions
* 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.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
Instructions) provides an overview of each diagnostic category.
DTC Descriptors
DTC B1925 02
- Driver Seat Cushion Heater Sensor Circuit Short to Ground
DTC B1925 05
- Driver Seat Cushion Heater Sensor Circuit High Voltage/Open
DTC B2170 02
- Passenger Seat Cushion Heater Sensor Circuit Short to Ground
DTC B2170 05
- Passenger Seat Cushion Heater Sensor Circuit High Voltage/Open
Diagnostic Fault Information
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.
