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 INSPECTIONDIAGNOSTIC TROUBLE CODE DESCRIPTIONSAIR CONDITIONING SYSTEM
2006 Lexus RX 400h AWD V6-3.3L (3MZ-FE) Hybrid
Air Conditioning System
2006 Lexus RX 400h AWD V6-3.3L (3MZ-FE) HybridSECTION Air Conditioning System
DIAGNOSTIC TROUBLE CODE CHART
HINT:
- *1: If the cabin temperature is approx. -18.6 degrees C (-1.48 degrees F) or lower, DTC B1411/11 may be output even though the system is normal.
- *2: If the ambient temperature is approx. -52.9 degrees C (-63.22 degrees F) or lower, a malfunction code may be output even though the system is normal.
- *3: If the check is performed in a dark place, DTC B1421/ 21 (solar sensor circuit abnormal) or DTC B1424/24 (solar sensor circuit abnormal) could be displayed.
- *4: The A/C amplifier memorizes the DTC of the respective malfunction that has occurred for a period of the time indicated in the brackets.
- *5: Short in circuit
- *6: Open in circuit
B1411/11-B1424/24:
B1431/31-B1446/46:
B1462/62-B1499/99:
HINT:
- *1: If the cabin temperature is approx. -18.6 degrees C (-1.48 degrees F) or lower, DTC B1411/11 may be output even though the system is normal.
- *2: If the ambient temperature is approx. -52.9 degrees C (-63.22 degrees F) or lower, a malfunction code may be output even though the system is normal.
- *3: If the check is performed in a dark place, DTC B1421/ 21 (solar sensor circuit abnormal) or DTC B1424/24 (solar sensor circuit abnormal) could be displayed.
- *4: The A/C amplifier memorizes the DTC of the respective malfunction that has occurred for a period of the time indicated in the brackets.
- *5: Short in circuit
- *6: Open in circuit
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.