2008 Lexus SC 430FACTORY OEM SERVICE PROCEDURE

Diagnostic Trouble Code Chart

HINT:

  • If an abnormality is not found when inspecting parts, inspect the ECU and ground points for poor contact.
  • If a trouble code is displayed during the DTC check, inspect the trouble areas listed for that code.

    Vehicle stability control system 

    VEHICLE STABILITY CONTROL SYSTEM

    DTC Code Detection Item Trouble Area
    C0200/31  Right Front Wheel Speed Sensor Signal Malfunction
    • Front speed sensor RH
    • Front speed sensor RH circuit
    • Sensor rotor
    • Sensor installation
    C0205/32  Left Front Wheel Speed Sensor Signal Malfunction
    • Front speed sensor LH
    • Front speed sensor LH circuit
    • Sensor rotor
    • Sensor installation
    C0210/33  Rear Speed Sensor RH Circuit
    • Rear speed sensor RH
    • Rear speed sensor RH circuit
    • Sensor rotor
    • Sensor installation
    C0215/34  Rear Speed Sensor LH Circuit
    • Rear speed sensor LH
    • Rear speed sensor LH circuit
    • Sensor rotor
    • Sensor installation
    C0226/21  SFR Solenoid Circuit
    • Brake actuator
    • SFRH or SFRR circuit
    C0236/22  SFL Solenoid Circuit
    • Brake master cylinder
    • SFLH or SFLR circuit
    C0246/23  SRR Solenoid Circuit
    • Brake actuator
    • SRRH or SRRR circuit
    C0256/24  SRL Solenoid Circuit
    • Brake actuator
    • SRLH or SRLR circuit
    C0278/11  Open or Short Circuit in ABS Solenoid Relay Circuit
    • ABS SOL relay
    • ABS SOL relay circuit
    C0279/12  Short to B+ in ABS Solenoid Relay Circuit
    • ABS SOL relay
    • ABS SOL relay circuit
    C1201/51  Engine Control System Malfunction Engine control system
    C1203/53  ECM Communication Circuit Malfunction
    • TRC +- communication line
    • ENG +- communication line
    • Skid contra! ECU
    • Translate ECU
    C1210/36  Zero Point Calibration of Yaw Rate Sensor Undone
    • Yaw rate sensor
    • Yaw rate sensor circuit
    • P range switch circuit
    C1223/43  ABS Control System Malfunction ABS control system
    C1225/25  SMC Solenoid Circuit
    • Brake actuator
    • SMC (SA1) circuit
    C1226/26  SPC Solenoid Circuit
    • Brake actuator
    • SPC (SA2) circuit
    C1227/27  SRC Solenoid Circuit
    • Brake actuator
    • SRC (SA3) circuit
    C1228/28  STR Solenoid Circuit
    • Brake actuator
    • STR circuit
    C1231/31  Steering Angle Sensor Circuit Malfunction
    • Steering sensor
    • Steering sensor circuit
    • +BI circuit
    C1232/32  Stuck in Deceleration Sensor
    • Deceleration sensor
    • Deceleration sensor circuit
    C1233/33  Open or Short Circuit in Yaw Rate Sensor Circuit
    • Yaw rate sensor
    • Yaw rate sensor circuit
    C1234/34  Yaw Rate Sensor Malfunction
    • Yaw rate sensor
    • Yaw rate sensor circuit
    C1235/35  Foreign Object is Attached on Tip of Front Speed Sensor RH
    • Front speed sensor RH
    • Front speed sensor RH circuit
    • Sensor installation
    C1236/36  Foreign Object is Attached on Tip of Front Speed Sensor LH
    • Front speed sensor LH
    • Front speed sensor LH circuit
    • Sensor installation
    C1238/38  Foreign Object is Attached on Tip of Rear Speed Sensor RH
    • Rear speed sensor RH
    • Rear speed sensor RH circuit
    • Sensor installation
    C1239/39  Foreign Object is Attached on Tip of Rear Speed Sensor LH
    • Rear speed sensor LH
    • Rear speed sensor LH circuit
    • Sensor installation
    C1241/41  Low Battery Positive Voltage or Abnormally High Battery Positive Voltage
    • Battery
    • Voltage regulator
    • Power source circuit
    C1242/42  IG2 Power Source Circuit
    • Battery
    • Voltage regulator
    • Power source circuit
    C1243/43  Acceleration Sensor Stuck Malfunction
    • Deceleration sensor
    • Deceleration sensor circuit
    C1244/44  Open or Short in Deceleration Sensor Circuit
    • Deceleration sensor
    • Deceleration sensor circuit
    C1245/45  Acceleration Sensor Output Malfunction
    • Deceleration sensor
    • Deceleration sensor circuit
    C1246/46  Master Cylinder Pressure Sensor Malfunction
    • Brake actuator (master cylinder pressure sensor)
    • Master cylinder pressure sensor circuit
    • Skid control ECU
    C1249/49  Open in Stop Light Switch Circuit Stop light switch circuit
    C1251/51  Open in Pump Motor Circuit Brake actuator (Brake booster pump motor)
    C1252/52  Brake Booster Pump Motor on Time Abnormally Long
    • Brake actuator (Brake booster pump motor)
    • Brake booster pump motor circuit
    • Pressure switch (PH or PL)
    C1253/53  Hydro Booster Pump Motor Relay Malfunction
    • ABS or TRAC MOTOR relay
    • ABS or TRAC MOTOR relay circuit
    • Brake booster pump motor circuit
    C1254/54  Pressure Switch Circuit
    • Pressure switch (PH or PL)
    • Pressure switch circuit
    C1256/56  Accumulator Low Pressure
    • Brake booster accumulator assembly
    • Pressure switch (PH or PL)
    • Brake actuator (Brake booster pump motor)
    C1257/57  IG Power Source
    • Battery
    • Voltage regulator
    • Power source circuit
    • Skid control ECU
    C1335/35  Steering Angle Sensor Circuit
    • Steering sensor
    • Steering sensor circuit
    C1336/39  Zero Point Calibration of Acceleration Sensor Undone
    • Deceleration sensor
    • Deceleration sensor circuit
    • Zero point calibration not done
    C1369/26  Translate ECU Malfunction Translate ECU
    U0073/42  Control Module Communication Bus OFF Communication line between ECM and translate ECU (CAN communication line)
    U0100/65  Lost Communication with ECM / PCM Communication line between ECM and translate ECU (CAN communication line)
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.

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