2008 Lexus SC 430FACTORY OEM SERVICE PROCEDURE

Diagnostic Trouble Code Chart

WARNING: This page is about a different car, the 2007 Lexus SC 430. However, it is still accessible from the selected car via links, so may be relevant.

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
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
Factory Service Tools

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When to See a Mechanic

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

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