LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Lexus >> 2007 >> LS 460L >> Repair and Diagnosis >> Body & Frame >> Windows >> Windshield/WINDOWGLASS >> Power Window Control System >> DTC B2312 Power Window Switch Malfunction >> Description
April 5, 2026: LEMON Manuals is launched! Read the announcement.

DTC B2312 Power Window Switch Malfunction: Description

The power window regulator motor assembly consists of the motor, regulator and ECU. The power window regulator motor assembly is driven by operating the power window regulator switch.

This DTC is output when the ECU built into the regulator motor assembly determines that the power window switch is stuck.

HINT:

This DTC may occur for all the windows.

NOTE:
  • When the power window regulator motor is reinstalled or replaced, the power window control system must be initialized.
  • After a door glass or a door glass run has been replaced, the jam protection function may operate unexpectedly when the AUTO UP function is used. In such cases, the AUTO UP function can be resumed by repeating the following operation at least 5 times:
    1. Close the power window by fully pulling up the power window switch and holding it in the AUTO UP position.
    2. Open the power window by fully pushing down the switch.

Master switch: 

MASTER SWITCH DTC DETECTION CONDITION CHART

DTC Code DTC Detection Condition Trouble Area
B2312 Master switch stuck
  • Master switch
  • Master switch held in same position for more than 20 seconds

Power window regulator motor (for Driver side): 

POWER WINDOW REGULATOR MOTOR (FOR DRIVER SIDE) DTC DETECTION CONDITION CHART

DTC Code DTC Detection Condition Trouble Area
B2312 Master switch stuck
  • Master switch
  • Power window regulator motor
  • Wire harness
  • Master switch held in same position for more than 20 seconds

Power window regulator motor (for Front passenger side): 

POWER WINDOW REGULATOR MOTOR (FOR FRONT PASSENGER SIDE)

DTC Code DTC Detection Condition Trouble Area
B2312 Power window regulator switch stuck
  • Power window regulator switch
  • Power window regulator motor
  • Wire harness
  • Power window regulator switch held in same position for more than 20 seconds

Power window regulator motor (for Rear LH): 

POWER WINDOW REGULATOR MOTOR (FOR REAR LH)

DTC Code DTC Detection Condition Trouble Area
B2312 Power window regulator switch stuck
  • Power window regulator switch
  • Power window regulator motor
  • Wire harness
  • Power window regulator switch held in same position for more than 20 seconds

Power window regulator motor (for Rear RH): 

POWER WINDOW REGULATOR MOTOR (FOR REAR RH)

DTC Code DTC Detection Condition Trouble Area
B2312 Power window regulator switch stuck
  • Power window regulator switch
  • Power window regulator motor
  • Wire harness
  • Power window regulator switch held in same position for more than 20 seconds