Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2000 Lexus GS 300FACTORY OEM SERVICE PROCEDURE
Anti-Lock Brake DTCS
ANTI-LOCK BRAKE DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION
| DTC | Description |
|---|---|
| C0278/11 | Open Or Short In ABS Solenoid Relay Circuit |
| C0279/12 | Battery Voltage Short In ABS Solenoid Relay Circuit |
| C0226/21 | Open Or Short In Hydraulic Brake Booster (Actuator) Solenoid Circuit (Right Front) |
| C0236/22 | Open Or Short In Hydraulic Brake Booster (Actuator) Solenoid Circuit (Left Front) |
| C0246/23 | Open Or Short In Hydraulic Brake Booster (Actuator) Solenoid Circuit (Right Rear) |
| C0256/24 | Open Or Short In Hydraulic Brake Booster (Actuator) Solenoid Circuit (Left Rear) |
| C1201/51 | Engine Control System Malfunction |
| C1203/53 | ECM Communication Circuit Malfunction |
| C1225/25 | Open Or Short In Hydraulic Brake Booster TRAC & VSC (Actuator) Solenoid Circuit SA1 |
| C1226/26 | Open Or Short In Hydraulic Brake Booster TRAC & VSC (Actuator) Solenoid Circuit SA2 |
| C1227/27 | Open Or Short In Hydraulic Brake Booster TRAC & VSC (Actuator) Solenoid Circuit SA3 |
| C1228/28 | Open Or Short In Hydraulic Brake Booster TRAC & VSC (Actuator) Solenoid Circuit STR |
| C0200/31 | Speed Sensor Signal (Right Front) |
| C0205/32 | Speed Sensor Signal (Left Front) |
| C0210/33 | Speed Sensor Signal (Right Rear) |
| C0215/34 | Speed Sensor Signal (Left Rear) |
| C1241/41 | IG1 Power Source Voltage Low Or High |
| C1242/42 | Open Circuit In IG2 Power Source |
| C1243/43 | Deceleration Sensor Malfunction (Constant Output) |
| C1244/44 | Open Or Short In Deceleration Sensor Circuit |
| C1245/45 | Deceleration Sensor Malfunction |
| C1246/46 | Master Cylinder Pressure Sensor Malfunction |
| C1249/49 | Open Brakelight Switch Circuit |
| C1251/51 | ABS Pump Motor Locked Or Open Ground Circuit |
| C1252/52 | ABS Pump Motor Malfunction |
| C1253/53 | ABS Pump Motor Relay Circuit Malfunction |
| C1254/54 | Pressure Switch Circuit Malfunction |
| C1256/56 | Accumulator Low Pressure Malfunction |
| C1257/57 | Power Supply Drive Circuit Malfunction |
| C1279/79 | Deceleration Sensor Is Faulty |
| C1281/81 | Master Cylinder Pressure Sensor Output Signal Is Faulty |
Factory Service Tools
Use the Manual With the Right Hardware
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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.