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.
1994 Lexus LS 400FACTORY OEM SERVICE PROCEDURE
Traction Control System
- Description
- Operation
- Bleeding Brake System
- Trouble Shooting
- Diagnosis & Testing
- Component Testing
- Removal & Installation
- Overhaul
- Adjustments
- Torque Specifications
- Diagnostic Charts
- DTC 24 - TRAC Sub-Throttle Actuator Circuit
- DTC 25, 26 & 27 - TRAC Sub-Throttle Valve
- DTC 31, 32, 33 & 34 - Speed Sensor Circuit
- DTC 41 - IG Power Source Circuit
- DTC 43 - Abs & TRAC Ecu Malfunction
- DTC 44 - Ne Signal Circuit
- DTC 45 & 46 - Main Throttle Position Sensor Circuit
- DTC 47 & 48 - Sub-Throttle Position Sensor Circuit
- DTC 49 - Engine Communication Circuit
- DTC 51 - Engine Malfunction Detection Circuit
- DTC 61 - Abs & TRAC Ecu Communication Circuit Malfunction
- TRAC Off Indicator, TRAC Cut Switch Circuit
- TRAC Indicator Light Circuit
- Tc TERMINAL CIRCUIT
- Wiring Diagrams
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.
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