B2440 CHEVROLET – Passenger Seat Back Heater Sensor Circuit

B2440 CHEVROLET Possible Symptoms

Engine Light ON (or Service Engine Soon Warning Light)

B2440 CHEVROLET Possible Causes

Faulty Passenger Seat Back Heater Sensor,Passenger Seat Back Heater Sensor harness is open or shorted,Passenger Seat Back Heater Sensor circuit poor electrical connection,Faulty Driver Seat Module (DSM)

B2440 CHEVROLET Description

The Driver Seat Module (DSM) relies on inputs from thermistors located in the Driver and Passenger seat backs to control heated seat temperatures. The thermistors are 2 wire sensors supplied with a 5-volt referenced signal circuit and low reference circuit from the DSM. Resistance through the thermistors varies with temperature causing the heated seat sensor signal circuit voltage levels to decrease as the seat back temperatures rise.