LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Lexus >> 2007 >> SC 430 >> Repair and Diagnosis >> Body & Frame >> Windows >> Windshield/WINDOWGLASS >> Power Window Control System >> DTC B1231 Jam Protection Limit Switch Circuit on Driver Door; DTC B1232 Jam Protection Pulse Switch Circuit on Driver Door >> Description
April 5, 2026: LEMON Manuals is launched! Read the announcement.

DTC B1231 Jam Protection Limit Switch Circuit on Driver Door; DTC B1232 Jam Protection Pulse Switch Circuit on Driver Door: Description

These DTCs are output when the driver door power window regulator motor circuit is malfunctioning.

DTC DETECTION CONDITION CHART

DTC No. DTC Detection Condition Trouble Area
B1231 Open in limit switch of power window regulator motor (for driver side)
  • Front power window regulator motor assembly LH (for driver side)
  • Multiplex network door ECU front LH (driver door ECU)
  • Wire harness
B1232 Open or short in pulse sensor of power window regulator motor (for driver side)
  • Front power window regulator motor assembly LH (for driver side)
  • Multiplex network door ECU front LH (driver door ECU)
  • Wire harness