Lighting and Horns: Service Precautions

2006 Lexus RX 400h AWD V6-3.3L (3MZ-FE) HybridSECTION Service Precautions
LIGHTING SYSTEM

PRECAUTION

1. PRECAUTION FOR DISCONNECTING THE BATTERY CABLE

NOTE: When disconnecting the negative (-) battery terminal, initialize the following systems after the terminal is reconnected.
- Lighting System (Adaptive Front-Lighting System)
- Power Window Control System
- Power Back Door System
- Sliding Roof System
- Back Door Closer System
- Power Door Lock Control System
- Electrical Back Door Outside Handle System
- SFI System

2. PRECAUTION FOR HEADLIGHT BULB REPLACEMENT (HALOGEN BULB)
a. Halogen bulbs have pressurized gas inside and require special handling. They can burst if scratched or dropped. Hold the bulb only by its plastic or metal case. Do not touch the glass part of a bulb with bare hands.

3. PRECAUTION FOR HEADLIGHT BULB REPLACEMENT (HID BULB)
a. When any defects such as deformation, crack, dent, chipping, etc. are identified on the HID headlight (especially, on the light control ECU), replace it with a new one.
b. Even if the operation seems to be normal, the fail-safe function may be defective.
c. Be careful not to scratch or drop bulbs of the HID headlight and halogen bulbs (for high beam headlights and fog lights) as they have pressurized gas inside and can be easily broken.
d. Touching the high voltage socket of the HID headlight with the headlight dimmer switch ON could generate momentary high voltage of 20,000 V and lead to a serious injury.
e. Never connect a tester to the high voltage socket of the HID headlight for measurement, as this may lead to a serious injury because of high voltage.
f. When servicing the HID headlight, keep it away from water including rain, turn off the light control switch, and disconnect the battery terminal and the connector of the light control ECU in advance to avoid electric shock.
g. When operating the HID headlight, operate it after assembling is completed and never turn on the lights without a bulb installed.
h. Do not turn on the HID headlight using another power source except the vehicle's.
RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.