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.
1997 Lexus SC 400FACTORY OEM SERVICE PROCEDURE
Anti-Lock Brake System DTCS
ANTI-LOCK BRAKE SYSTEM DTCS (WITH TRACTION CONTROL)
| OEM Code | Description | ||||||
|---|---|---|---|---|---|---|---|
| 11 | Open Or Short In ABS Solenoid Relay Circuit | ||||||
| 12 | Short To Voltage In ABS Solenoid Relay Circuit | ||||||
| 13 | Open Or Short In ABS Motor Relay Circuit | ||||||
| 14 | Short To Voltage In ABS Motor Relay Circuit | ||||||
| 21 | Open Or Short In ABS Actuator Solenoid SFR Circuit | ||||||
| 22 | Open Or Short In ABS Actuator Solenoid SFL Circuit | ||||||
| 23 | Open Or Short In ABS Actuator Solenoid SRR Circuit | ||||||
| 24(1) | Open Or Short In ABS & TRAC Actuator Solenoid SRL Circuit | ||||||
| 25(1) | Open Or Short In ABS & TRAC Actuator Solenoid SMC Circuit | ||||||
| 26(1) | Open Or Short In ABS & TRAC Actuator Solenoid SPC Circuit | ||||||
| 27(1) | Open Or Short In ABS & TRAC Actuator Solenoid SRC Circuit | ||||||
| 31(2) | Right Front Wheel Speed Sensor Signal Malfunction | ||||||
| 32(2) | Left Front Wheel Speed Sensor Signal Malfunction | ||||||
| 33(2) | Right Rear Wheel Speed Sensor Signal Malfunction | ||||||
| 34(2) | Left Rear Wheel Speed Sensor Signal Malfunction | ||||||
| 41 | Low Or High Battery Voltage | ||||||
| 49 | Open In Stop Light Switch Circuit | ||||||
| 51 | ABS Pump Motor Locked Or Open In ABS Pump Motor Ground | ||||||
| 53 (1) | TRAC Motor Pump, Delayed Motor Energize | ||||||
| 54 (1) | TRAC Motor Pump, Excessive Motor Frequency | ||||||
| 55 (1) | Brake Fluid Reservoir Level Low | ||||||
| 56 (1) | Open Or Short In Pressure Sensor Circuit | ||||||
| 57 (1) | Pressure Sensor Malfunction | ||||||
| 61 (1) | TRAC ECU Communication Abnormal | ||||||
| 62 (1) | Wheel Speed Sensor Signal Malfunction | ||||||
| 71 (3) | Right Front Speed Sensor Signal Voltage Low | ||||||
| 72 (3) | Left Front Speed Sensor Signal Voltage Low | ||||||
| 73 (3) | Right Rear Speed Sensor Signal Voltage Low | ||||||
| 74 (3) | Left Rear Speed Sensor Signal Voltage Low | ||||||
| 75 (3) | Abnormal Change In Output Signal From Right Front Speed Sensor | ||||||
| 76 (3) | Abnormal Change In Output Signal From Left Front Speed Sensor | ||||||
| 77 (3) | Abnormal Change In Output Signal From Right Rear Speed Sensor | ||||||
| 78 (3) | Abnormal Change In Output Signal From Left Rear Speed Sensor | ||||||
| Always On | Malfunction In ABS/TRAC ECU | ||||||
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ANTI-LOCK BRAKE SYSTEM DTCS (WITHOUT TRACTION CONTROL)
| OEM Code | Description |
|---|---|
| 11 | ABS SOLENOID RELAY CIRCUIT |
| 12 | ABS SOLENOID RELAY CIRCUIT |
| 13 | ABS MOTOR RELAY CIRCUIT |
| 14 | ABS MOTOR RELAY CIRCUIT |
| 21 | ABS ACTUATOR SOLENOID CIRCUIT |
| 22 | ABS ACTUATOR SOLENOID CIRCUIT |
| 23 | ABS ACTUATOR SOLENOID CIRCUIT |
| 31 | SPEED SENSOR CIRCUIT |
| 32 | SPEED SENSOR CIRCUIT |
| 33 | SPEED SENSOR CIRCUIT |
| 34 | SPEED SENSOR CIRCUIT |
| 41 | IG POWER SUPPLY CIRCUIT |
| 49 | STOP LIGHT SWITCH CIRCUIT |
| 51 | ABS PUMP MOTOR LOCK |
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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