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.
Body Electrical System: Precaution
HINT:
Take care to observe the following precautions when performing inspections or removal and replacement of body electrical related parts.
- HEADLIGHT SYSTEM
- Halogen bulbs have pressurized gas inside and require special handling. They can burst if scratched or dropped. Hold a bulb only by its plastic or metal case. Don't touch the glass part of a bulb with bare hands.
- When high voltage socket of discharge headlight is touched with the light control switch HEAD, high voltage of 20,000 V is momentarily generated. This might lead to a serious accident.
- Never connect the tester to the high voltage socket of discharge headlight for measurement, as this leads to a serious accident because of high voltage.
- When performing operation related to the discharge headlight, make sure to do it in the place with no water of rain to prevent electric shock, with light control switch OFF, battery terminal removed, connector of light control ECU disconnected.
- When performing operation related to the discharge headlight, make sure to do it after assembling has been completely over and never light up without a bulb installed.
- Do not light up the discharge headlight using another power source except vehicle's.
- When there is a defect on the discharge headlight or any shock has been applied to it, replace the light with a new one.
Even if the light operates normally, there is a possibility that the fail-safe function works.
- SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
The LEXUS LS430 is equipped with an SRS (Supplemental Restraint System) such as the driver airbag and front passenger airbag. failure to carry out service operation in the correct sequence could cause the SRS to unexpectedly deployed during servicing, possibly leading to a serious accident. Before servicing (including removal or installation of parts, inspection or replacement), be sure to read the precautionary codices in the RS section.
- COMBINATION METER SYSTEM
The cold cathode tube connectors in the combination meter are charged with high voltage AC current when power is supplied, so do not touch them when they are charged.
- MICRO COMPUTER PRESET DRIVING POSITION SYS
(Power Seat Control System, Power Mirror Control System, Power Tilt and Telescopic Steering System)
If the battery negative (-) terminal is disconnected, the preset driving positions stored in memory are erased, if so be sure to note the positions and reset them after the battery terminal is reconnected.
- AUDIO SYSTEM
If the battery negative (-) terminal is disconnected, the preset AM, FM 1 and FM 2 stations stored in memory are erased, so be sure to not the stations and reset them after the battery terminal is reconnected.
- MOBILE COMMUNICATION SYSTEM
If the vehicle is equipped with a mobile communication system, refer to precautions in the IN section.
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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