LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Lexus >> 2013 >> CT 200h Base >> Repair and Diagnosis >> Body & Frame >> Windows >> Power Window Control System (Diagnostic Codes & Symptom Tests) >> 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 assemblies are operated by the multiplex network master switch assembly, power window regulator switch assembly or rear power window regulator switch assemblies. The power window regulator motor assemblies have motor, regulator and ECU functions.

This DTC is output when the ECU built into a regulator motor and master switch determine that the multiplex network master switch assembly, power window regulator switch assembly or rear power window regulator switch assembly is stuck.

MASTER SWITCH (MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY)

DTC No. DTC Detection Condition Trouble Area
B2312
  • Multiplex network master switch assembly stuck
  • Multiplex network master switch assembly held in same position for more than 20 seconds
  • Door control switch (multiplex network master switch assembly) operated for 20 seconds or more
 Multiplex network master switch assembly
D-DOOR MOTOR (POWER WINDOW REGULATOR MOTOR ASSEMBLY (FOR DRIVER SIDE))

DTC No. DTC Detection Condition Trouble Area
B2312
  • Multiplex network master switch assembly stuck
  • Multiplex network master switch assembly held in same position for more than 20 seconds
  • Multiplex network master switch assembly
  • Power window regulator motor assembly (for driver side)
  • Wire harness or connector
P-DOOR MOTOR (POWER WINDOW REGULATOR MOTOR ASSEMBLY (FOR FRONT PASSENGER SIDE))

DTC No. DTC Detection Condition Trouble Area
B2312
  • Power window regulator switch assembly stuck
  • Power window regulator switch assembly held in same position for more than 20 seconds
  • Power window regulator switch assembly
  • Power window regulator motor assembly (for front passenger side)
  • Wire harness or connector
RL-DOOR MOTOR (POWER WINDOW REGULATOR MOTOR ASSEMBLY (FOR REAR LH SIDE))

DTC No. DTC Detection Condition Trouble Area
B2312
  • Rear power window regulator switch assembly (for LH side) stuck
  • Power window regulator switch assembly held in same position for more than 20 seconds
  • Rear power window regulator switch assembly (for LH side)
  • Power window regulator motor assembly (for rear LH side)
  • Wire harness or connector
RR-DOOR MOTOR (POWER WINDOW REGULATOR MOTOR ASSEMBLY (FOR REAR RH SIDE))

DTC No. DTC Detection Condition Trouble Area
B2312
  • Rear power window regulator switch assembly (for RH side) stuck
  • Power window regulator switch assembly held in same position for more than 20 seconds
  • Rear power window regulator switch assembly (for RH side)
  • Power window regulator motor assembly (for rear RH side)
  • Wire harness or connector
scientia non olet · About LEMON Manuals