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 DIAGNOSISHYBRID DRIVE SYSTEMSTESTING AND INSPECTIONINITIAL INSPECTION AND DIAGNOSTIC OVERVIEWHYBRID CONTROL SYSTEMCHECK FOR INTERMITTENT PROBLEMS
2006 Lexus RX 400h AWD V6-3.3L (3MZ-FE) Hybrid
Check For Intermittent Problems
2006 Lexus RX 400h AWD V6-3.3L (3MZ-FE) HybridSECTION Check For Intermittent Problems
CHECK FOR INTERMITTENT PROBLEMS
a. Perform a simulation test
1. In the simulation test, reproduce the driving condition at the trouble occurrence according to the customer's comments and freeze frame data recorded with DTCs, such as an opening angle of the accelerator pedal, SOC, engine coolant temperature, engine rpm, and Motor/Generator/Rear Motor rpm and torque.
b. Check the connector(s) and terminal(s)
c. Wiggle the harness and connector(s)
d. Heat or cool suspected parts
NOTE: Do not directly heat or cool the MG ECU with the inverter cover removed.
a. Perform a simulation test
1. In the simulation test, reproduce the driving condition at the trouble occurrence according to the customer's comments and freeze frame data recorded with DTCs, such as an opening angle of the accelerator pedal, SOC, engine coolant temperature, engine rpm, and Motor/Generator/Rear Motor rpm and torque.
b. Check the connector(s) and terminal(s)
c. Wiggle the harness and connector(s)
d. Heat or cool suspected parts
NOTE: Do not directly heat or cool the MG ECU with the inverter cover removed.
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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.