Passenger Seat Back Heater Sensor Circuit
Table of contents
B2440 CADILLAC 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)
How do I fix code B2440 CADILLAC?
Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector’s pins.
Cost of diagnosing the B2440 CADILLAC code
The cost of diagnosing the B2440 CADILLAC code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle’s make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.
Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
B2440 CADILLAC 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.