What is the problem with intermittent heated seats?
So the problem is intermittent heated seats that may include trouble code B3941. The B3941 front seat heaters circuit trouble code sets with the driver’s door module (DDM) or passenger door module (PDM) detects that the voltage to the seat heater element is shorted to ground.
How does the heated seat module work on a car?
The heated seat module is also programmed to provide self-diagnostics, if a problem with the heated seat system is detected. If the module detects certain failures within the heated seat system, it will provide a visual indication of the failure by flashing the indicator lamps in the appro- priate heated seat switch.
When does the heated seat system turn off?
The heated seat system will only operate when the surface temperature of the seat cushion is below the designed temperature set points of the sys- tem. The heated seat system will also automatically turn off whenever the ignition switch is turned to any position except On, or if the engine quits run- ning.
What are the sensors on a heated seat?
The heated seat sensors are Negative Thermal Coefficient (NTC) thermistors. The sensors for both front seats receive a voltage feed from a single output of the heated seat module, but the module receives individual sensor inputs from the driver side and passenger side sen- sors. The heated seat elements and sensors should not be repaired.
So the problem is intermittent heated seats that may include trouble code B3941. The B3941 front seat heaters circuit trouble code sets with the driver’s door module (DDM) or passenger door module (PDM) detects that the voltage to the seat heater element is shorted to ground.
How are the heated seats on a car controlled?
There’s just one “memory seat module” controlling both seats, and also controlling the adjustable brake and accelerator pedals. The control switches for the heated seats in each door don’t have a physical circuit to the “memory seat module” but rather communicate using the chassis serial bus.
How does the seat heater on a GM SUV work?
Power is supplied to the seat heater elements by the door modules. Ground for the heater elements is pulse width modulated so the module can vary the on/off time of the circuit and thereby adjust the heat.
What does it mean when heated seats Don’t Turn on?
In the heated seats don’t turn on scenario, the driver can push the heated seats button and the heaters will not come on. But if the driver turns the key to OFF and then back to ON, they will work. Other times, the heated seats will turn on normally.