2010 Cadillac Truck SRX FWD V6-3.0L Page 515

2010 Cadillac Truck SRX FWD V6-3.0L 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.