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 SYSTEMOPERATION CHECK
2006 Lexus RX 400h AWD V6-3.3L (3MZ-FE) Hybrid
Operation Check
2006 Lexus RX 400h AWD V6-3.3L (3MZ-FE) HybridSECTION Operation Check
OPERATION CHECK
1. INPUT SIGNAL CHECK
a. Connect the intelligent tester to the DLC3.
b. Check the cruise control main switch using the DATA LIST function in the intelligent tester (ON-OFF, CANCEL, -/SET, +/RES, and MODE).
2. INSPECT MODE SWITCH
a. Turn the ignition switch on.
HINT: Dynamic laser cruise is default mode.
b. After pushing the ON-OFF button on, push the cruise control main switch to MODE for at least 1 second without any other control. Make sure that "NORMAL." is indicated and no indication is shown in the display.
NOTE: Do not push any other switches before pushing the main switch to MODE. If another switch is pushed, turn the main switch OFF and repeat the procedure above.
HINT: If the system cannot switch to the constant speed control mode, push the ON-OFF button off once, and perform the same procedures as shown above. If a malfunction is still detected in the system, and then start the engine and perform the above procedure.
3. INSPECT STEERING PAD SWITCH ASSEMBLY
a. Turn the switch on.
b. Push on the ON-OFF button of the cruise control main switch.
c. Push on the distance control switch of the steering pad switch.
d. Check the the indication multi-information display of the combination meter, changes from "LONG", "MIDDLE" to "SHORT" in order.
HINT: The indication is immediately set to "LONG" each time the engine is started.
1. INPUT SIGNAL CHECK
a. Connect the intelligent tester to the DLC3.
b. Check the cruise control main switch using the DATA LIST function in the intelligent tester (ON-OFF, CANCEL, -/SET, +/RES, and MODE).
2. INSPECT MODE SWITCH
a. Turn the ignition switch on.
HINT: Dynamic laser cruise is default mode.
b. After pushing the ON-OFF button on, push the cruise control main switch to MODE for at least 1 second without any other control. Make sure that "NORMAL." is indicated and no indication is shown in the display.
NOTE: Do not push any other switches before pushing the main switch to MODE. If another switch is pushed, turn the main switch OFF and repeat the procedure above.
HINT: If the system cannot switch to the constant speed control mode, push the ON-OFF button off once, and perform the same procedures as shown above. If a malfunction is still detected in the system, and then start the engine and perform the above procedure.
3. INSPECT STEERING PAD SWITCH ASSEMBLY
a. Turn the switch on.
b. Push on the ON-OFF button of the cruise control main switch.
c. Push on the distance control switch of the steering pad switch.
d. Check the the indication multi-information display of the combination meter, changes from "LONG", "MIDDLE" to "SHORT" in order.
HINT: The indication is immediately set to "LONG" each time the engine is started.
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:
- • 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.