DTC B2312 Driver Side Door Master Switch Malfunction: Description

The portion of the power window control system that is located in the driver door consists of a power window master switch, regulator, and a motor with an integrated ECU. The driver door power window regulator motor is controlled by the ECU when the power window master switch is operated (models with jam protection).

When the ECU determines that the power window master switch is stuck, DTC B2312 is set.

NOTE: The power window control system uses a serial communication protocol (LIN) to communicate with the main body ECU. Inspect the communication function by following HOW TO PROCEED WITH TROUBLESHOOTING. Troubleshoot the power window control system after confirming that the communication system is functioning properly.

DTC DETECTION CONDITION CHART

DTC No.	DTC Detection Condition	Trouble Area
B2312	The power window regulator master switch is stuck	Power window regulator motor (on driver side) Power window regulator master switch Wire harness Power window regulator master switch is held in same position for more than 20 seconds