DTC B2311 Driver Door Motor 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).

DTC B2311 is set when the ECU for the driver door power window regulator motor assembly malfunctions.

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.

HINT:

Initialization is required only when the power window regulator motor is replaced. However, replacing the motor may cause the motor gear to be engaged in a different position. This can cause a difference to exist between the current door glass position and the position memorized in the ECU. In this case, the jam protection function may work improperly. Return the system to the pre-initialized condition and reinitializes the system.

To return the system to the pre-initialized condition:

Disconnect the power window regulator motor connector during power window operation. This will return the motor to the pre-initialized condition.

DTC DETECTION CONDITION CHART

DTC No.	DTC Detection Condition	Trouble Area
B2311	When either condition below is met: The power window regulator motor (on driver side) malfunctions When the ECU in the power widow regulator motor (on driver side) determines that the fully closed window position has deviated approximately 20 mm (0.79 in.) or more from the normal position	Battery disconnection when the engine switch is on (IG) Power window regulator motor (on driver side) Incorrect installation of power window components Overheated power window regulator motor (on driver side)