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.
2003 Lexus ES 300FACTORY OEM SERVICE PROCEDURE
System Tests: Notes
SYMPTOM INDEX
| Symptom | Perform Test |
|---|---|
| Malfunction In Speedometer | A |
| Malfunction In Tachometer | B |
| Malfunction In Water Temperature Receiver Gauge | C |
| Malfunction In Fuel Receiver Gauge | D |
| Operating Light Control Rheostat Does Not Change Light Brightness | E |
| Entire Instrument Panel Does Not Operate | F |
| Buzzer Does Not Sound (Key Reminder Warning, Seat Belt Warning) | G |
| Seat Belt Warning Lamp For Driver's Seat Does Not Operate | H |
| Seat Belt Warning Lamp For Front Passenger's Seat Does Not Flash | I |
| Malfunction In Clock Display | J |
| Multi-Information Display Screen Does Not Change When Steering Pad Switch Is Operated | K |
| Malfunction In Average Fuel Consumption/Instantaneous Fuel Consumption/Possible Running Distance Display | L |
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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