B1402 Code: Meaning, Causes, and Symptoms | OBD2 Codes
B1402 – Driver Power Window Down Switch Circuit Failure
B1402 Possible Symptoms
Engine Light ON (or Service Engine Soon Warning Light)
B1402 Possible Causes
Driver Power Window Regulator Electric Motor,Faulty Master Window Regulator Control Switch,Faulty Front Electronics Module (FEM),Master Window Regulator Control Switch harness is open or shorted,Master Window Regulator Control Switch circuit poor electrical connection
The driver power window is controlled by the Front Electronics Module (FEM). The driver power window regulator control switch and motor are hardwired directly to the FEM. The FEM will read the window regulator control switch actuation and provide the corresponding output to the window motor. If one-touch operation is selected, the FEM powers the driver window motor for seven seconds or until the FEM senses the motor is stalled. If the window track, regulator or glass weatherstrips cause the glass to bind, the FEM may interpret this as a motor stalled condition and halt motor operation.