2007 Lexus SC 430FACTORY OEM SERVICE PROCEDURE

Diagnostic Trouble Code Chart

HINT:

If a trouble code is displayed during the DTC check, inspect the trouble areas listed for that code. For details of the code, refer to the "see page" below.

DTC DETECTION CONDITION CHART

DTC No. Detection Item Trouble Area
B1221Β  Power Window Switch Circuit on Driver Door
  • Power window regulator master switch assembly
  • Multiplex network door ECU front LH (driver door ECU)
  • Wire harness
B1223Β  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
B1231Β  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
B1232Β  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
B1233Β  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
B1234Β  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
Factory Service Tools

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.

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