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 DIAGNOSISA L L DIAGNOSTIC TROUBLE CODES ( DTC )TESTING AND INSPECTIONP CODE CHARTSP0571DYNAMIC LASER CRUISE CONTROL SYSTEMSTOP LIGHT SWITCH CIRCUIT MALFUNCTION
2006 Lexus RX 400h AWD V6-3.3L (3MZ-FE) Hybrid
Stop Light Switch Circuit Malfunction
2006 Lexus RX 400h AWD V6-3.3L (3MZ-FE) HybridSECTION Stop Light Switch Circuit Malfunction
DTC P0571 Stop Light Switch Circuit Malfunction
DESCRIPTION
The hybrid vehicle control ECU receives the brake demand signal from the cruise control ECU (distance control ECU) and transmits it to the skid control ECU.
The skid control ECU receives a signal from the hybrid vehicle control ECU and operates the brake actuator.
The skid control ECU operates the brake actuator and illuminations the stop light by operating the BRK relay at the same time.
INSPECTION PROCEDURE
DESCRIPTION
DTC Detection Condition:
The hybrid vehicle control ECU receives the brake demand signal from the cruise control ECU (distance control ECU) and transmits it to the skid control ECU.
The skid control ECU receives a signal from the hybrid vehicle control ECU and operates the brake actuator.
The skid control ECU operates the brake actuator and illuminations the stop light by operating the BRK relay at the same time.
Wiring Diagram (Part 1):
Wiring Diagram (Part 2):
Step 1-2:
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.