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.
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HOMESERVICE MANUALSLEXUS2006RX 400H AWD V6-3.3L (3MZ-FE) HYBRIDREPAIR AND DIAGNOSISCRUISE CONTROLTESTING AND INSPECTIONCOMPONENT TESTS AND GENERAL DIAGNOSTICSDYNAMIC LASER CRUISE CONTROL SYSTEMLASER SENSOR POWER SOURCE CIRCUIT
2006 Lexus RX 400h AWD V6-3.3L (3MZ-FE) Hybrid
Laser Sensor Power Source Circuit
2006 Lexus RX 400h AWD V6-3.3L (3MZ-FE) HybridSECTION Laser Sensor Power Source Circuit
Laser Sensor Power Source Circuit
DESCRIPTION
This circuit provides power to operate the laser sensor. The laser sensor emits laser beams towards an object in front and measures the distance and direction of the object by receiving the beam reflections.
Based on the reflections, the sensor calculates the difference in speed between your own vehicle and the object in front. This data is transmitted to the distance control ECU (cruise control ECU).
HINT: The laser sensor monitors the laser emission and reception by itself. This DTC is detected when it cannot monitor.
When rain drops or snowflakes strike the laser sensor face, the distance between the vehicle in front and your own vehicle cannot be measured correctly.
The dynamic laser cruise control system may not be able to detect the vehicle in front and may not properly maintain the correct vehicle-to-vehicle distance.
- The vehicle in front is a tall trailer.
- The back of the vehicle in front is extremely dirty.
- Emissions from the vehicle in from other lanes are heavy.
- The vehicle in front has no reflector.
- The laser sensor is receiving a strong flash of light (sunlight, etc.).
INSPECTION PROCEDURE
DESCRIPTION
This circuit provides power to operate the laser sensor. The laser sensor emits laser beams towards an object in front and measures the distance and direction of the object by receiving the beam reflections.
Based on the reflections, the sensor calculates the difference in speed between your own vehicle and the object in front. This data is transmitted to the distance control ECU (cruise control ECU).
HINT: The laser sensor monitors the laser emission and reception by itself. This DTC is detected when it cannot monitor.
When rain drops or snowflakes strike the laser sensor face, the distance between the vehicle in front and your own vehicle cannot be measured correctly.
The dynamic laser cruise control system may not be able to detect the vehicle in front and may not properly maintain the correct vehicle-to-vehicle distance.
- The vehicle in front is a tall trailer.
- The back of the vehicle in front is extremely dirty.
- Emissions from the vehicle in from other lanes are heavy.
- The vehicle in front has no reflector.
- The laser sensor is receiving a strong flash of light (sunlight, etc.).
Wiring Diagram:
Step 1:
Step 2:
Step 3:
INSPECTION PROCEDURE
RENDER: 1.0x
NO RELATED
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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.