LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Lexus >> 2008 >> SC 430 >> Repair and Diagnosis >> Body & Frame >> Windows >> Windshield/WINDOWGLASS >> Power Window Control System >> Diagnostic Trouble Code Chart
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Diagnostic Trouble Code Chart

HINT:

If a trouble code is displayed during the DTC check, inspect the trouble areas listed for that code.

DTC DETECTION CONDITION CHART

DTC No. Detection Item Trouble Area
B1221  Power Window Switch Circuit on Driver Door
  • Power window regulator master switch assembly
  • Multiplex network door ECU front LH (driver door ECU)
  • Wire harness
B1223  Power Window Switch Circuit on Passenger Door
  • Power window regulator switch assembly (passenger side)
  • Door control switch assembly (passenger side)
  • Multiplex network door ECU front RH (Passenger door ECU)
  • Wire harness
B1231  Jam Protection Limit Switch Circuit on Driver Door
  • Power window regulator motor assembly LH front (driver side)
  • Multiplex network door ECU front LH (driver door ECU)
  • Wire harness
B1232  Jam Protection Pulse Switch Circuit on Driver Door
  • Power window regulator motor assembly LH front (driver side)
  • Multiplex network door ECU front LH (driver door ECU)
  • Wire harness
B1233  Jam Protection Limit Switch Circuit on Passenger Door
  • Power window regulator motor assembly RH front (passenger side)
  • Multiplex network door ECU front RH (Passenger door ECU)
  • Wire harness
B1234  Jam Protection Pulse Switch Circuit on Passenger Door
  • Power window regulator motor assembly RH front (passenger side)
  • Multiplex network door ECU front RH (Passenger door ECU)
  • Wire harness